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Add 'compiler/rustc_codegen_gcc/' from commit 'afae271d5d3719eeb92c18bc004bb6d1965a5f3f'

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git-subtree-dir: compiler/rustc_codegen_gcc
git-subtree-mainline: ae90dcf020
git-subtree-split: afae271d5d
This commit is contained in:
Antoni Boucher 2021-08-12 21:53:49 -04:00
commit f7237f16ae
80 changed files with 15608 additions and 0 deletions
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compiler/rustc_codegen_gcc/.github/FUNDING.yml vendored Normal file
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github: antoyo
patreon: antoyo

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name: CI
on:
- push
- pull_request
jobs:
build:
runs-on: ubuntu-latest
strategy:
fail-fast: false
steps:
- uses: actions/checkout@v2
- name: Install packages
run: sudo apt-get install ninja-build ripgrep
- name: Download artifact
uses: dawidd6/action-download-artifact@v2
with:
workflow: main.yml
name: libgccjit.so
path: gcc-build
repo: antoyo/gcc
- name: Setup path to libgccjit
run: |
echo $(readlink -f gcc-build) > gcc_path
ln gcc-build/libgccjit.so gcc-build/libgccjit.so.0
- name: Set LIBRARY_PATH
run: echo "LIBRARY_PATH=$(cat gcc_path)" >> $GITHUB_ENV
# https://github.com/actions/cache/issues/133
- name: Fixup owner of ~/.cargo/
# Don't remove the trailing /. It is necessary to follow the symlink.
run: sudo chown -R $(whoami):$(id -ng) ~/.cargo/
- name: Cache cargo installed crates
uses: actions/cache@v1.1.2
with:
path: ~/.cargo/bin
key: cargo-installed-crates2-ubuntu-latest
- name: Cache cargo registry
uses: actions/cache@v1
with:
path: ~/.cargo/registry
key: ${{ runner.os }}-cargo-registry2-${{ hashFiles('**/Cargo.lock') }}
- name: Cache cargo index
uses: actions/cache@v1
with:
path: ~/.cargo/git
key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
- name: Cache cargo target dir
uses: actions/cache@v1.1.2
with:
path: target
key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('rust-toolchain') }}
- name: Build
run: |
./prepare_build.sh
./build.sh
./clean_all.sh
- name: Prepare dependencies
run: |
git config --global user.email "user@example.com"
git config --global user.name "User"
./prepare.sh
# Compile is a separate step, as the actions-rs/cargo action supports error annotations
- name: Compile
uses: actions-rs/cargo@v1.0.3
with:
command: build
args: --release
- name: Test
run: |
# Enable backtraces for easier debugging
export RUST_BACKTRACE=1
# Reduce amount of benchmark runs as they are slow
export COMPILE_RUNS=2
export RUN_RUNS=2
./test.sh --release

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target
**/*.rs.bk
*.rlib
*.o
perf.data
perf.data.old
*.events
*.string*
/build_sysroot/sysroot
/build_sysroot/Cargo.lock
/build_sysroot/test_target/Cargo.lock
/rust
/regex
gimple*
*asm
res
test-backend

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compiler/rustc_codegen_gcc/Cargo.toml Normal file
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[package]
name = "rustc_codegen_gcc"
version = "0.1.0"
authors = ["Antoni Boucher <bouanto@zoho.com>"]
edition = "2018"
license = "MIT OR Apache-2.0"
[lib]
crate-type = ["dylib"]
[[test]]
name = "lang_tests"
path = "tests/lib.rs"
harness = false
[dependencies]
gccjit = { git = "https://github.com/antoyo/gccjit.rs" }
# Local copy.
#gccjit = { path = "../gccjit.rs" }
target-lexicon = "0.10.0"
ar = "0.8.0"
[dependencies.object]
version = "0.25.0"
default-features = false
features = ["read", "std", "write"] # We don't need WASM support.
[dev-dependencies]
lang_tester = "0.3.9"
tempfile = "3.1.0"
[profile.dev]
# By compiling dependencies with optimizations, performing tests gets much faster.
opt-level = 3
[profile.dev.package.rustc_codegen_gcc]
# Disabling optimizations for cg_gccjit itself makes compilation after a change faster.
opt-level = 0
# Disable optimizations and debuginfo of build scripts and some of the heavy build deps, as the
# execution time of build scripts is so fast that optimizing them slows down the total build time.
[profile.dev.build-override]
opt-level = 0
debug = false
[profile.release.build-override]
opt-level = 0
debug = false

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Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS

23
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Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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# WIP libgccjit codegen backend for rust
This is a GCC codegen for rustc, which means it can be loaded by the existing rustc frontend, but benefits from GCC: more architectures are supported and GCC's optimizations are used.
**Despite its name, libgccjit can be used for ahead-of-time compilation, as is used here.**
## Motivation
The primary goal of this project is to be able to compile Rust code on platforms unsupported by LLVM.
A secondary goal is to check if using the gcc backend will provide any run-time speed improvement for the programs compiled using rustc.
## Building
**This requires a patched libgccjit in order to work.
The patches in [this repostory](https://github.com/antoyo/libgccjit-patches) need to be applied.
(Those patches should work when applied on master, but in case it doesn't work, they are known to work when applied on 079c23cfe079f203d5df83fea8e92a60c7d7e878.)
You can also use my [fork of gcc](https://github.com/antoyo/gcc) which already includes these patches.**
**Put the path to your custom build of libgccjit in the file `gcc_path`.**
```bash
$ git clone https://github.com/antoyo/rustc_codegen_gcc.git
$ cd rustc_codegen_gcc
$ ./prepare_build.sh # download and patch sysroot src
$ ./build.sh --release
```
To run the tests:
```bash
$ ./prepare.sh # download and patch sysroot src and install hyperfine for benchmarking
$ ./test.sh --release
```
## Usage
`$cg_gccjit_dir` is the directory you cloned this repo into in the following instructions.
### Cargo
```bash
$ CHANNEL="release" $cg_gccjit_dir/cargo.sh run
```
If you compiled cg_gccjit in debug mode (aka you didn't pass `--release` to `./test.sh`) you should use `CHANNEL="debug"` instead or omit `CHANNEL="release"` completely.
### Rustc
> You should prefer using the Cargo method.
```bash
$ rustc +$(cat $cg_gccjit_dir/rust-toolchain) -Cpanic=abort -Zcodegen-backend=$cg_gccjit_dir/target/release/librustc_codegen_gcc.so --sysroot $cg_gccjit_dir/build_sysroot/sysroot my_crate.rs
```
## Env vars
<dl>
<dt>CG_GCCJIT_INCR_CACHE_DISABLED</dt>
<dd>Don't cache object files in the incremental cache. Useful during development of cg_gccjit
to make it possible to use incremental mode for all analyses performed by rustc without caching
object files when their content should have been changed by a change to cg_gccjit.</dd>
<dt>CG_GCCJIT_DISPLAY_CG_TIME</dt>
<dd>Display the time it took to perform codegen for a crate</dd>
</dl>
## Debugging
Sometimes, libgccjit will crash and output an error like this:
```
during RTL pass: expand
libgccjit.so: error: in expmed_mode_index, at expmed.h:249
0x7f0da2e61a35 expmed_mode_index
../../../gcc/gcc/expmed.h:249
0x7f0da2e61aa4 expmed_op_cost_ptr
../../../gcc/gcc/expmed.h:271
0x7f0da2e620dc sdiv_cost_ptr
../../../gcc/gcc/expmed.h:540
0x7f0da2e62129 sdiv_cost
../../../gcc/gcc/expmed.h:558
0x7f0da2e73c12 expand_divmod(int, tree_code, machine_mode, rtx_def*, rtx_def*, rtx_def*, int)
../../../gcc/gcc/expmed.c:4335
0x7f0da2ea1423 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier)
../../../gcc/gcc/expr.c:9240
0x7f0da2cd1a1e expand_gimple_stmt_1
../../../gcc/gcc/cfgexpand.c:3796
0x7f0da2cd1c30 expand_gimple_stmt
../../../gcc/gcc/cfgexpand.c:3857
0x7f0da2cd90a9 expand_gimple_basic_block
../../../gcc/gcc/cfgexpand.c:5898
0x7f0da2cdade8 execute
../../../gcc/gcc/cfgexpand.c:6582
```
To see the code which causes this error, call the following function:
```c
gcc_jit_context_dump_to_file(ctxt, "/tmp/output.c", 1 /* update_locations */)
```
This will create a C-like file and add the locations into the IR pointing to this C file.
Then, rerun the program and it will output the location in the second line:
```
libgccjit.so: /tmp/something.c:61322:0: error: in expmed_mode_index, at expmed.h:249
```
Or add a breakpoint to `add_error` in gdb and print the line number using:
```
p loc->m_line
```
### How to use a custom-build rustc
* Build the stage1 compiler (`rustup toolchain link debug-current stage2 build/x86_64-unknown-linux-gnu/stage1`).
* Clean and rebuild the codegen with `debug-current` in the file `rust-toolchain`.
* Add `~/.rustup/toolchains/debug-current/lib/rustlib/x86_64-unknown-linux-gnu/lib` to `LD_LIBRARY_PATH`.

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#!/bin/bash
#set -x
set -e
export GCC_PATH=$(cat gcc_path)
export LD_LIBRARY_PATH="$GCC_PATH"
export LIBRARY_PATH="$GCC_PATH"
if [[ "$1" == "--release" ]]; then
export CHANNEL='release'
CARGO_INCREMENTAL=1 cargo rustc --release
else
echo $LD_LIBRARY_PATH
export CHANNEL='debug'
cargo rustc
fi
source config.sh
rm -r target/out || true
mkdir -p target/out/gccjit
echo "[BUILD] sysroot"
time ./build_sysroot/build_sysroot.sh $CHANNEL

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[package]
authors = ["bjorn3 <bjorn3@users.noreply.github.com>"]
name = "sysroot"
version = "0.0.0"
[dependencies]
core = { path = "./sysroot_src/library/core" }
compiler_builtins = "0.1"
alloc = { path = "./sysroot_src/library/alloc" }
std = { path = "./sysroot_src/library/std", features = ["panic_unwind", "backtrace"] }
test = { path = "./sysroot_src/library/test" }
[patch.crates-io]
rustc-std-workspace-core = { path = "./sysroot_src/library/rustc-std-workspace-core" }
rustc-std-workspace-alloc = { path = "./sysroot_src/library/rustc-std-workspace-alloc" }
rustc-std-workspace-std = { path = "./sysroot_src/library/rustc-std-workspace-std" }
[profile.release]
debug = true

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#!/bin/bash
# Requires the CHANNEL env var to be set to `debug` or `release.`
set -e
cd $(dirname "$0")
pushd ../ >/dev/null
source ./config.sh
popd >/dev/null
# Cleanup for previous run
# v Clean target dir except for build scripts and incremental cache
rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} 2>/dev/null || true
rm Cargo.lock test_target/Cargo.lock 2>/dev/null || true
rm -r sysroot/ 2>/dev/null || true
# Build libs
export RUSTFLAGS="$RUSTFLAGS -Z force-unstable-if-unmarked -Cpanic=abort"
if [[ "$1" == "--release" ]]; then
sysroot_channel='release'
RUSTFLAGS="$RUSTFLAGS -Zmir-opt-level=3" cargo build --target $TARGET_TRIPLE --release
else
sysroot_channel='debug'
cargo build --target $TARGET_TRIPLE
fi
# Copy files to sysroot
mkdir -p sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
cp -r target/$TARGET_TRIPLE/$sysroot_channel/deps/* sysroot/lib/rustlib/$TARGET_TRIPLE/lib/

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#!/bin/bash
set -e
cd $(dirname "$0")
SRC_DIR=$(dirname $(rustup which rustc))"/../lib/rustlib/src/rust/"
DST_DIR="sysroot_src"
if [ ! -e $SRC_DIR ]; then
echo "Please install rust-src component"
exit 1
fi
rm -rf $DST_DIR
mkdir -p $DST_DIR/library
cp -r $SRC_DIR/library $DST_DIR/
pushd $DST_DIR
echo "[GIT] init"
git init
echo "[GIT] add"
git add .
echo "[GIT] commit"
# This is needed on virgin system where nothing is configured.
# git really needs something here, or it will fail.
# Even using --author is not enough.
git config user.email || git config user.email "none@example.com"
git config user.name || git config user.name "None"
git commit -m "Initial commit" -q
for file in $(ls ../../patches/ | grep -v patcha); do
echo "[GIT] apply" $file
git apply ../../patches/$file
git add -A
git commit --no-gpg-sign -m "Patch $file"
done
popd
echo "Successfully prepared libcore for building"

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#![no_std]

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compiler/rustc_codegen_gcc/cargo.sh Executable file
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#!/bin/bash
if [ -z $CHANNEL ]; then
export CHANNEL='debug'
fi
pushd $(dirname "$0") >/dev/null
source config.sh
# read nightly compiler from rust-toolchain file
TOOLCHAIN=$(cat rust-toolchain)
popd >/dev/null
if [[ $(rustc -V) != $(rustc +${TOOLCHAIN} -V) ]]; then
echo "rustc_codegen_gcc is build for $(rustc +${TOOLCHAIN} -V) but the default rustc version is $(rustc -V)."
echo "Using $(rustc +${TOOLCHAIN} -V)."
fi
cmd=$1
shift
RUSTDOCFLAGS=$RUSTFLAGS cargo +${TOOLCHAIN} $cmd --target $TARGET_TRIPLE $@

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#!/bin/bash --verbose
set -e
rm -rf target/ build_sysroot/{sysroot/,sysroot_src/,target/,Cargo.lock} perf.data{,.old}
rm -rf regex/ simple-raytracer/

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set -e
export CARGO_INCREMENTAL=0
export GCC_PATH=$(cat gcc_path)
unamestr=`uname`
if [[ "$unamestr" == 'Linux' ]]; then
dylib_ext='so'
elif [[ "$unamestr" == 'Darwin' ]]; then
dylib_ext='dylib'
else
echo "Unsupported os"
exit 1
fi
HOST_TRIPLE=$(rustc -vV | grep host | cut -d: -f2 | tr -d " ")
TARGET_TRIPLE=$HOST_TRIPLE
#TARGET_TRIPLE="aarch64-unknown-linux-gnu"
linker=''
RUN_WRAPPER=''
if [[ "$HOST_TRIPLE" != "$TARGET_TRIPLE" ]]; then
if [[ "$TARGET_TRIPLE" == "aarch64-unknown-linux-gnu" ]]; then
# We are cross-compiling for aarch64. Use the correct linker and run tests in qemu.
linker='-Clinker=aarch64-linux-gnu-gcc'
RUN_WRAPPER='qemu-aarch64 -L /usr/aarch64-linux-gnu'
else
echo "Unknown non-native platform"
fi
fi
export RUSTFLAGS=$linker' -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend='$(pwd)'/target/'$CHANNEL'/librustc_codegen_gcc.'$dylib_ext' --sysroot '$(pwd)'/build_sysroot/sysroot'
#export RUSTFLAGS=$linker' -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend='$(pwd)'/target/'$CHANNEL'/librustc_codegen_gcc.'$dylib_ext' --sysroot '$(pwd)'/build_sysroot/sysroot -Clto=fat -Cembed-bitcode=yes'
# FIXME remove once the atomic shim is gone
if [[ `uname` == 'Darwin' ]]; then
export RUSTFLAGS="$RUSTFLAGS -Clink-arg=-undefined -Clink-arg=dynamic_lookup"
fi
RUSTC="rustc $RUSTFLAGS -L crate=target/out --out-dir target/out"
export RUSTC_LOG=warn # display metadata load errors
export LD_LIBRARY_PATH="$(pwd)/target/out:$(pwd)/build_sysroot/sysroot/lib/rustlib/$TARGET_TRIPLE/lib:$GCC_PATH"
export DYLD_LIBRARY_PATH=$LD_LIBRARY_PATH
export CG_CLIF_DISPLAY_CG_TIME=1
export CG_CLIF_INCR_CACHE_DISABLED=1

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#![feature(start, box_syntax, core_intrinsics, alloc_prelude, alloc_error_handler)]
#![no_std]
extern crate alloc;
extern crate alloc_system;
use alloc::prelude::v1::*;
use alloc_system::System;
#[global_allocator]
static ALLOC: System = System;
#[link(name = "c")]
extern "C" {
fn puts(s: *const u8) -> i32;
}
#[panic_handler]
fn panic_handler(_: &core::panic::PanicInfo) -> ! {
unsafe {
core::intrinsics::abort();
}
}
#[alloc_error_handler]
fn alloc_error_handler(_: alloc::alloc::Layout) -> ! {
unsafe {
core::intrinsics::abort();
}
}
#[start]
fn main(_argc: isize, _argv: *const *const u8) -> isize {
let world: Box<&str> = box "Hello World!\0";
unsafe {
puts(*world as *const str as *const u8);
}
0
}

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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![no_std]
#![feature(allocator_api, rustc_private)]
#![cfg_attr(any(unix, target_os = "redox"), feature(libc))]
// The minimum alignment guaranteed by the architecture. This value is used to
// add fast paths for low alignment values.
#[cfg(all(any(target_arch = "x86",
target_arch = "arm",
target_arch = "mips",
target_arch = "powerpc",
target_arch = "powerpc64")))]
const MIN_ALIGN: usize = 8;
#[cfg(all(any(target_arch = "x86_64",
target_arch = "aarch64",
target_arch = "mips64",
target_arch = "s390x",
target_arch = "sparc64")))]
const MIN_ALIGN: usize = 16;
pub struct System;
#[cfg(any(windows, unix, target_os = "redox"))]
mod realloc_fallback {
use core::alloc::{GlobalAlloc, Layout};
use core::cmp;
use core::ptr;
impl super::System {
pub(crate) unsafe fn realloc_fallback(&self, ptr: *mut u8, old_layout: Layout,
new_size: usize) -> *mut u8 {
// Docs for GlobalAlloc::realloc require this to be valid:
let new_layout = Layout::from_size_align_unchecked(new_size, old_layout.align());
let new_ptr = GlobalAlloc::alloc(self, new_layout);
if !new_ptr.is_null() {
let size = cmp::min(old_layout.size(), new_size);
ptr::copy_nonoverlapping(ptr, new_ptr, size);
GlobalAlloc::dealloc(self, ptr, old_layout);
}
new_ptr
}
}
}
#[cfg(any(unix, target_os = "redox"))]
mod platform {
extern crate libc;
use core::ptr;
use MIN_ALIGN;
use System;
use core::alloc::{GlobalAlloc, Layout};
unsafe impl GlobalAlloc for System {
#[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
if layout.align() <= MIN_ALIGN && layout.align() <= layout.size() {
libc::malloc(layout.size()) as *mut u8
} else {
#[cfg(target_os = "macos")]
{
if layout.align() > (1 << 31) {
return ptr::null_mut()
}
}
aligned_malloc(&layout)
}
}
#[inline]
unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
if layout.align() <= MIN_ALIGN && layout.align() <= layout.size() {
libc::calloc(layout.size(), 1) as *mut u8
} else {
let ptr = self.alloc(layout.clone());
if !ptr.is_null() {
ptr::write_bytes(ptr, 0, layout.size());
}
ptr
}
}
#[inline]
unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
libc::free(ptr as *mut libc::c_void)
}
#[inline]
unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
if layout.align() <= MIN_ALIGN && layout.align() <= new_size {
libc::realloc(ptr as *mut libc::c_void, new_size) as *mut u8
} else {
self.realloc_fallback(ptr, layout, new_size)
}
}
}
#[cfg(any(target_os = "android",
target_os = "hermit",
target_os = "redox",
target_os = "solaris"))]
#[inline]
unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
// On android we currently target API level 9 which unfortunately
// doesn't have the `posix_memalign` API used below. Instead we use
// `memalign`, but this unfortunately has the property on some systems
// where the memory returned cannot be deallocated by `free`!
//
// Upon closer inspection, however, this appears to work just fine with
// Android, so for this platform we should be fine to call `memalign`
// (which is present in API level 9). Some helpful references could
// possibly be chromium using memalign [1], attempts at documenting that
// memalign + free is ok [2] [3], or the current source of chromium
// which still uses memalign on android [4].
//
// [1]: https://codereview.chromium.org/10796020/
// [2]: https://code.google.com/p/android/issues/detail?id=35391
// [3]: https://bugs.chromium.org/p/chromium/issues/detail?id=138579
// [4]: https://chromium.googlesource.com/chromium/src/base/+/master/
// /memory/aligned_memory.cc
libc::memalign(layout.align(), layout.size()) as *mut u8
}
#[cfg(not(any(target_os = "android",
target_os = "hermit",
target_os = "redox",
target_os = "solaris")))]
#[inline]
unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
let mut out = ptr::null_mut();
let ret = libc::posix_memalign(&mut out, layout.align(), layout.size());
if ret != 0 {
ptr::null_mut()
} else {
out as *mut u8
}
}
}
#[cfg(windows)]
#[allow(nonstandard_style)]
mod platform {
use MIN_ALIGN;
use System;
use core::alloc::{GlobalAlloc, Layout};
type LPVOID = *mut u8;
type HANDLE = LPVOID;
type SIZE_T = usize;
type DWORD = u32;
type BOOL = i32;
extern "system" {
fn GetProcessHeap() -> HANDLE;
fn HeapAlloc(hHeap: HANDLE, dwFlags: DWORD, dwBytes: SIZE_T) -> LPVOID;
fn HeapReAlloc(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID, dwBytes: SIZE_T) -> LPVOID;
fn HeapFree(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID) -> BOOL;
fn GetLastError() -> DWORD;
}
#[repr(C)]
struct Header(*mut u8);
const HEAP_ZERO_MEMORY: DWORD = 0x00000008;
unsafe fn get_header<'a>(ptr: *mut u8) -> &'a mut Header {
&mut *(ptr as *mut Header).offset(-1)
}
unsafe fn align_ptr(ptr: *mut u8, align: usize) -> *mut u8 {
let aligned = ptr.add(align - (ptr as usize & (align - 1)));
*get_header(aligned) = Header(ptr);
aligned
}
#[inline]
unsafe fn allocate_with_flags(layout: Layout, flags: DWORD) -> *mut u8 {
let ptr = if layout.align() <= MIN_ALIGN {
HeapAlloc(GetProcessHeap(), flags, layout.size())
} else {
let size = layout.size() + layout.align();
let ptr = HeapAlloc(GetProcessHeap(), flags, size);
if ptr.is_null() {
ptr
} else {
align_ptr(ptr, layout.align())
}
};
ptr as *mut u8
}
unsafe impl GlobalAlloc for System {
#[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
allocate_with_flags(layout, 0)
}
#[inline]
unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
allocate_with_flags(layout, HEAP_ZERO_MEMORY)
}
#[inline]
unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
if layout.align() <= MIN_ALIGN {
let err = HeapFree(GetProcessHeap(), 0, ptr as LPVOID);
debug_assert!(err != 0, "Failed to free heap memory: {}",
GetLastError());
} else {
let header = get_header(ptr);
let err = HeapFree(GetProcessHeap(), 0, header.0 as LPVOID);
debug_assert!(err != 0, "Failed to free heap memory: {}",
GetLastError());
}
}
#[inline]
unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
if layout.align() <= MIN_ALIGN {
HeapReAlloc(GetProcessHeap(), 0, ptr as LPVOID, new_size) as *mut u8
} else {
self.realloc_fallback(ptr, layout, new_size)
}
}
}
}

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// Adapted from rustc run-pass test suite
#![feature(arbitrary_self_types, unsize, coerce_unsized, dispatch_from_dyn)]
#![feature(rustc_attrs)]
use std::{
ops::{Deref, CoerceUnsized, DispatchFromDyn},
marker::Unsize,
};
struct Ptr<T: ?Sized>(Box<T>);
impl<T: ?Sized> Deref for Ptr<T> {
type Target = T;
fn deref(&self) -> &T {
&*self.0
}
}
impl<T: Unsize<U> + ?Sized, U: ?Sized> CoerceUnsized<Ptr<U>> for Ptr<T> {}
impl<T: Unsize<U> + ?Sized, U: ?Sized> DispatchFromDyn<Ptr<U>> for Ptr<T> {}
struct Wrapper<T: ?Sized>(T);
impl<T: ?Sized> Deref for Wrapper<T> {
type Target = T;
fn deref(&self) -> &T {
&self.0
}
}
impl<T: CoerceUnsized<U>, U> CoerceUnsized<Wrapper<U>> for Wrapper<T> {}
impl<T: DispatchFromDyn<U>, U> DispatchFromDyn<Wrapper<U>> for Wrapper<T> {}
trait Trait {
// This method isn't object-safe yet. Unsized by-value `self` is object-safe (but not callable
// without unsized_locals), but wrappers arond `Self` currently are not.
// FIXME (mikeyhew) uncomment this when unsized rvalues object-safety is implemented
// fn wrapper(self: Wrapper<Self>) -> i32;
fn ptr_wrapper(self: Ptr<Wrapper<Self>>) -> i32;
fn wrapper_ptr(self: Wrapper<Ptr<Self>>) -> i32;
fn wrapper_ptr_wrapper(self: Wrapper<Ptr<Wrapper<Self>>>) -> i32;
}
impl Trait for i32 {
fn ptr_wrapper(self: Ptr<Wrapper<Self>>) -> i32 {
**self
}
fn wrapper_ptr(self: Wrapper<Ptr<Self>>) -> i32 {
**self
}
fn wrapper_ptr_wrapper(self: Wrapper<Ptr<Wrapper<Self>>>) -> i32 {
***self
}
}
fn main() {
let pw = Ptr(Box::new(Wrapper(5))) as Ptr<Wrapper<dyn Trait>>;
assert_eq!(pw.ptr_wrapper(), 5);
let wp = Wrapper(Ptr(Box::new(6))) as Wrapper<Ptr<dyn Trait>>;
assert_eq!(wp.wrapper_ptr(), 6);
let wpw = Wrapper(Ptr(Box::new(Wrapper(7)))) as Wrapper<Ptr<Wrapper<dyn Trait>>>;
assert_eq!(wpw.wrapper_ptr_wrapper(), 7);
}

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// run-pass
#![allow(dead_code)]
struct Foo<T: ?Sized> {
a: u16,
b: T
}
trait Bar {
fn get(&self) -> usize;
}
impl Bar for usize {
fn get(&self) -> usize { *self }
}
struct Baz<T: ?Sized> {
a: T
}
struct HasDrop<T: ?Sized> {
ptr: Box<usize>,
data: T
}
fn main() {
// Test that zero-offset works properly
let b : Baz<usize> = Baz { a: 7 };
assert_eq!(b.a.get(), 7);
let b : &Baz<dyn Bar> = &b;
assert_eq!(b.a.get(), 7);
// Test that the field is aligned properly
let f : Foo<usize> = Foo { a: 0, b: 11 };
assert_eq!(f.b.get(), 11);
let ptr1 : *const u8 = &f.b as *const _ as *const u8;
let f : &Foo<dyn Bar> = &f;
let ptr2 : *const u8 = &f.b as *const _ as *const u8;
assert_eq!(f.b.get(), 11);
// The pointers should be the same
assert_eq!(ptr1, ptr2);
// Test that nested DSTs work properly
let f : Foo<Foo<usize>> = Foo { a: 0, b: Foo { a: 1, b: 17 }};
assert_eq!(f.b.b.get(), 17);
let f : &Foo<Foo<dyn Bar>> = &f;
assert_eq!(f.b.b.get(), 17);
// Test that get the pointer via destructuring works
let f : Foo<usize> = Foo { a: 0, b: 11 };
let f : &Foo<dyn Bar> = &f;
let &Foo { a: _, b: ref bar } = f;
assert_eq!(bar.get(), 11);
// Make sure that drop flags don't screw things up
let d : HasDrop<Baz<[i32; 4]>> = HasDrop {
ptr: Box::new(0),
data: Baz { a: [1,2,3,4] }
};
assert_eq!([1,2,3,4], d.data.a);
let d : &HasDrop<Baz<[i32]>> = &d;
assert_eq!(&[1,2,3,4], &d.data.a);
}

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#![feature(no_core, unboxed_closures)]
#![no_core]
#![allow(dead_code)]
extern crate mini_core;
use mini_core::*;
fn abc(a: u8) -> u8 {
a * 2
}
fn bcd(b: bool, a: u8) -> u8 {
if b {
a * 2
} else {
a * 3
}
}
fn call() {
abc(42);
}
fn indirect_call() {
let f: fn() = call;
f();
}
enum BoolOption {
Some(bool),
None,
}
fn option_unwrap_or(o: BoolOption, d: bool) -> bool {
match o {
BoolOption::Some(b) => b,
BoolOption::None => d,
}
}
fn ret_42() -> u8 {
42
}
fn return_str() -> &'static str {
"hello world"
}
fn promoted_val() -> &'static u8 {
&(1 * 2)
}
fn cast_ref_to_raw_ptr(abc: &u8) -> *const u8 {
abc as *const u8
}
fn cmp_raw_ptr(a: *const u8, b: *const u8) -> bool {
a == b
}
fn int_cast(a: u16, b: i16) -> (u8, u16, u32, usize, i8, i16, i32, isize, u8, u32) {
(
a as u8, a as u16, a as u32, a as usize, a as i8, a as i16, a as i32, a as isize, b as u8,
b as u32,
)
}
fn char_cast(c: char) -> u8 {
c as u8
}
pub struct DebugTuple(());
fn debug_tuple() -> DebugTuple {
DebugTuple(())
}
fn size_of<T>() -> usize {
intrinsics::size_of::<T>()
}
fn use_size_of() -> usize {
size_of::<u64>()
}
unsafe fn use_copy_intrinsic(src: *const u8, dst: *mut u8) {
intrinsics::copy::<u8>(src, dst, 1);
}
unsafe fn use_copy_intrinsic_ref(src: *const u8, dst: *mut u8) {
let copy2 = &intrinsics::copy::<u8>;
copy2(src, dst, 1);
}
const ABC: u8 = 6 * 7;
fn use_const() -> u8 {
ABC
}
pub fn call_closure_3arg() {
(|_, _, _| {})(0u8, 42u16, 0u8)
}
pub fn call_closure_2arg() {
(|_, _| {})(0u8, 42u16)
}
struct IsNotEmpty;
impl<'a, 'b> FnOnce<(&'a &'b [u16],)> for IsNotEmpty {
type Output = (u8, u8);
#[inline]
extern "rust-call" fn call_once(mut self, arg: (&'a &'b [u16],)) -> (u8, u8) {
self.call_mut(arg)
}
}
impl<'a, 'b> FnMut<(&'a &'b [u16],)> for IsNotEmpty {
#[inline]
extern "rust-call" fn call_mut(&mut self, _arg: (&'a &'b [u16],)) -> (u8, u8) {
(0, 42)
}
}
pub fn call_is_not_empty() {
IsNotEmpty.call_once((&(&[0u16] as &[_]),));
}
fn eq_char(a: char, b: char) -> bool {
a == b
}
unsafe fn transmute(c: char) -> u32 {
intrinsics::transmute(c)
}
unsafe fn deref_str_ptr(s: *const str) -> &'static str {
&*s
}
fn use_array(arr: [u8; 3]) -> u8 {
arr[1]
}
fn repeat_array() -> [u8; 3] {
[0; 3]
}
fn array_as_slice(arr: &[u8; 3]) -> &[u8] {
arr
}
unsafe fn use_ctlz_nonzero(a: u16) -> u16 {
intrinsics::ctlz_nonzero(a)
}
fn ptr_as_usize(ptr: *const u8) -> usize {
ptr as usize
}
fn float_cast(a: f32, b: f64) -> (f64, f32) {
(a as f64, b as f32)
}
fn int_to_float(a: u8, b: i32) -> (f64, f32) {
(a as f64, b as f32)
}
fn make_array() -> [u8; 3] {
[42, 0, 5]
}
fn some_promoted_tuple() -> &'static (&'static str, &'static str) {
&("abc", "some")
}
fn index_slice(s: &[u8]) -> u8 {
s[2]
}
pub struct StrWrapper {
s: str,
}
fn str_wrapper_get(w: &StrWrapper) -> &str {
&w.s
}
fn i16_as_i8(a: i16) -> i8 {
a as i8
}
struct Unsized(u8, str);
fn get_sized_field_ref_from_unsized_type(u: &Unsized) -> &u8 {
&u.0
}
fn get_unsized_field_ref_from_unsized_type(u: &Unsized) -> &str {
&u.1
}
pub fn reuse_byref_argument_storage(a: (u8, u16, u32)) -> u8 {
a.0
}

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#![feature(
no_core, lang_items, intrinsics, unboxed_closures, type_ascription, extern_types,
untagged_unions, decl_macro, rustc_attrs, transparent_unions, auto_traits,
thread_local
)]
#![no_core]
#![allow(dead_code)]
#[no_mangle]
unsafe extern "C" fn _Unwind_Resume() {
intrinsics::unreachable();
}
#[lang = "sized"]
pub trait Sized {}
#[lang = "unsize"]
pub trait Unsize<T: ?Sized> {}
#[lang = "coerce_unsized"]
pub trait CoerceUnsized<T> {}
impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b T {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a mut U> for &'a mut T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for *mut T {}
#[lang = "dispatch_from_dyn"]
pub trait DispatchFromDyn<T> {}
// &T -> &U
impl<'a, T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<&'a U> for &'a T {}
// &mut T -> &mut U
impl<'a, T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<&'a mut U> for &'a mut T {}
// *const T -> *const U
impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*const U> for *const T {}
// *mut T -> *mut U
impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*mut U> for *mut T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U>> for Box<T> {}
#[lang = "receiver"]
pub trait Receiver {}
impl<T: ?Sized> Receiver for &T {}
impl<T: ?Sized> Receiver for &mut T {}
impl<T: ?Sized> Receiver for Box<T> {}
#[lang = "copy"]
pub unsafe trait Copy {}
unsafe impl Copy for bool {}
unsafe impl Copy for u8 {}
unsafe impl Copy for u16 {}
unsafe impl Copy for u32 {}
unsafe impl Copy for u64 {}
unsafe impl Copy for usize {}
unsafe impl Copy for i8 {}
unsafe impl Copy for i16 {}
unsafe impl Copy for i32 {}
unsafe impl Copy for isize {}
unsafe impl Copy for f32 {}
unsafe impl Copy for char {}
unsafe impl<'a, T: ?Sized> Copy for &'a T {}
unsafe impl<T: ?Sized> Copy for *const T {}
unsafe impl<T: ?Sized> Copy for *mut T {}
#[lang = "sync"]
pub unsafe trait Sync {}
unsafe impl Sync for bool {}
unsafe impl Sync for u8 {}
unsafe impl Sync for u16 {}
unsafe impl Sync for u32 {}
unsafe impl Sync for u64 {}
unsafe impl Sync for usize {}
unsafe impl Sync for i8 {}
unsafe impl Sync for i16 {}
unsafe impl Sync for i32 {}
unsafe impl Sync for isize {}
unsafe impl Sync for char {}
unsafe impl<'a, T: ?Sized> Sync for &'a T {}
unsafe impl Sync for [u8; 16] {}
#[lang = "freeze"]
unsafe auto trait Freeze {}
unsafe impl<T: ?Sized> Freeze for PhantomData<T> {}
unsafe impl<T: ?Sized> Freeze for *const T {}
unsafe impl<T: ?Sized> Freeze for *mut T {}
unsafe impl<T: ?Sized> Freeze for &T {}
unsafe impl<T: ?Sized> Freeze for &mut T {}
#[lang = "structural_peq"]
pub trait StructuralPartialEq {}
#[lang = "structural_teq"]
pub trait StructuralEq {}
#[lang = "not"]
pub trait Not {
type Output;
fn not(self) -> Self::Output;
}
impl Not for bool {
type Output = bool;
fn not(self) -> bool {
!self
}
}
#[lang = "mul"]
pub trait Mul<RHS = Self> {
type Output;
#[must_use]
fn mul(self, rhs: RHS) -> Self::Output;
}
impl Mul for u8 {
type Output = Self;
fn mul(self, rhs: Self) -> Self::Output {
self * rhs
}
}
impl Mul for usize {
type Output = Self;
fn mul(self, rhs: Self) -> Self::Output {
self * rhs
}
}
#[lang = "add"]
pub trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "sub"]
pub trait Sub<RHS = Self> {
type Output;
fn sub(self, rhs: RHS) -> Self::Output;
}
impl Sub for usize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for u8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i16 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
#[lang = "rem"]
pub trait Rem<RHS = Self> {
type Output;
fn rem(self, rhs: RHS) -> Self::Output;
}
impl Rem for usize {
type Output = Self;
fn rem(self, rhs: Self) -> Self {
self % rhs
}
}
#[lang = "bitor"]
pub trait BitOr<RHS = Self> {
type Output;
#[must_use]
fn bitor(self, rhs: RHS) -> Self::Output;
}
impl BitOr for bool {
type Output = bool;
fn bitor(self, rhs: bool) -> bool {
self | rhs
}
}
impl<'a> BitOr<bool> for &'a bool {
type Output = bool;
fn bitor(self, rhs: bool) -> bool {
*self | rhs
}
}
#[lang = "eq"]
pub trait PartialEq<Rhs: ?Sized = Self> {
fn eq(&self, other: &Rhs) -> bool;
fn ne(&self, other: &Rhs) -> bool;
}
impl PartialEq for u8 {
fn eq(&self, other: &u8) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u8) -> bool {
(*self) != (*other)
}
}
impl PartialEq for u16 {
fn eq(&self, other: &u16) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u16) -> bool {
(*self) != (*other)
}
}
impl PartialEq for u32 {
fn eq(&self, other: &u32) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u32) -> bool {
(*self) != (*other)
}
}
impl PartialEq for u64 {
fn eq(&self, other: &u64) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u64) -> bool {
(*self) != (*other)
}
}
impl PartialEq for usize {
fn eq(&self, other: &usize) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &usize) -> bool {
(*self) != (*other)
}
}
impl PartialEq for i8 {
fn eq(&self, other: &i8) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &i8) -> bool {
(*self) != (*other)
}
}
impl PartialEq for i32 {
fn eq(&self, other: &i32) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &i32) -> bool {
(*self) != (*other)
}
}
impl PartialEq for isize {
fn eq(&self, other: &isize) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &isize) -> bool {
(*self) != (*other)
}
}
impl PartialEq for char {
fn eq(&self, other: &char) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &char) -> bool {
(*self) != (*other)
}
}
impl<T: ?Sized> PartialEq for *const T {
fn eq(&self, other: &*const T) -> bool {
*self == *other
}
fn ne(&self, other: &*const T) -> bool {
*self != *other
}
}
#[lang = "neg"]
pub trait Neg {
type Output;
fn neg(self) -> Self::Output;
}
impl Neg for i8 {
type Output = i8;
fn neg(self) -> i8 {
-self
}
}
impl Neg for i16 {
type Output = i16;
fn neg(self) -> i16 {
self
}
}
impl Neg for isize {
type Output = isize;
fn neg(self) -> isize {
-self
}
}
impl Neg for f32 {
type Output = f32;
fn neg(self) -> f32 {
-self
}
}
pub enum Option<T> {
Some(T),
None,
}
pub use Option::*;
#[lang = "phantom_data"]
pub struct PhantomData<T: ?Sized>;
#[lang = "fn_once"]
#[rustc_paren_sugar]
pub trait FnOnce<Args> {
#[lang = "fn_once_output"]
type Output;
extern "rust-call" fn call_once(self, args: Args) -> Self::Output;
}
#[lang = "fn_mut"]
#[rustc_paren_sugar]
pub trait FnMut<Args>: FnOnce<Args> {
extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output;
}
#[lang = "panic"]
#[track_caller]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\n\0" as *const str as *const u8);
intrinsics::abort();
}
}
#[lang = "panic_bounds_check"]
#[track_caller]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
#[lang = "eh_personality"]
fn eh_personality() -> ! {
loop {}
}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "deref"]
pub trait Deref {
type Target: ?Sized;
fn deref(&self) -> &Self::Target;
}
#[lang = "owned_box"]
pub struct Box<T: ?Sized>(*mut T);
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Box<U>> for Box<T> {}
impl<T: ?Sized> Drop for Box<T> {
fn drop(&mut self) {
// drop is currently performed by compiler.
}
}
impl<T> Deref for Box<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&**self
}
}
#[lang = "exchange_malloc"]
unsafe fn allocate(size: usize, _align: usize) -> *mut u8 {
libc::malloc(size)
}
#[lang = "box_free"]
unsafe fn box_free<T: ?Sized>(ptr: *mut T) {
libc::free(ptr as *mut u8);
}
#[lang = "drop"]
pub trait Drop {
fn drop(&mut self);
}
#[lang = "manually_drop"]
#[repr(transparent)]
pub struct ManuallyDrop<T: ?Sized> {
pub value: T,
}
#[lang = "maybe_uninit"]
#[repr(transparent)]
pub union MaybeUninit<T> {
pub uninit: (),
pub value: ManuallyDrop<T>,
}
pub mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
pub fn size_of<T>() -> usize;
pub fn size_of_val<T: ?::Sized>(val: *const T) -> usize;
pub fn min_align_of<T>() -> usize;
pub fn min_align_of_val<T: ?::Sized>(val: *const T) -> usize;
pub fn copy<T>(src: *const T, dst: *mut T, count: usize);
pub fn transmute<T, U>(e: T) -> U;
pub fn ctlz_nonzero<T>(x: T) -> T;
pub fn needs_drop<T>() -> bool;
pub fn bitreverse<T>(x: T) -> T;
pub fn bswap<T>(x: T) -> T;
pub fn write_bytes<T>(dst: *mut T, val: u8, count: usize);
pub fn unreachable() -> !;
}
}
pub mod libc {
#[link(name = "c")]
extern "C" {
pub fn puts(s: *const u8) -> i32;
pub fn printf(format: *const i8, ...) -> i32;
pub fn malloc(size: usize) -> *mut u8;
pub fn free(ptr: *mut u8);
pub fn memcpy(dst: *mut u8, src: *const u8, size: usize);
pub fn memmove(dst: *mut u8, src: *const u8, size: usize);
pub fn strncpy(dst: *mut u8, src: *const u8, size: usize);
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
extern {
type VaListImpl;
}
#[lang = "va_list"]
#[repr(transparent)]
pub struct VaList<'a>(&'a mut VaListImpl);
#[rustc_builtin_macro]
#[rustc_macro_transparency = "semitransparent"]
pub macro stringify($($t:tt)*) { /* compiler built-in */ }
#[rustc_builtin_macro]
#[rustc_macro_transparency = "semitransparent"]
pub macro file() { /* compiler built-in */ }
#[rustc_builtin_macro]
#[rustc_macro_transparency = "semitransparent"]
pub macro line() { /* compiler built-in */ }
#[rustc_builtin_macro]
#[rustc_macro_transparency = "semitransparent"]
pub macro cfg() { /* compiler built-in */ }
pub static A_STATIC: u8 = 42;
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[no_mangle]
pub fn get_tls() -> u8 {
#[thread_local]
static A: u8 = 42;
A
}

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// Adapted from https://github.com/sunfishcode/mir2cranelift/blob/master/rust-examples/nocore-hello-world.rs
#![feature(
no_core, unboxed_closures, start, lang_items, box_syntax, never_type, linkage,
extern_types, thread_local
)]
#![no_core]
#![allow(dead_code, non_camel_case_types)]
extern crate mini_core;
use mini_core::*;
use mini_core::libc::*;
unsafe extern "C" fn my_puts(s: *const u8) {
puts(s);
}
#[lang = "termination"]
trait Termination {
fn report(self) -> i32;
}
impl Termination for () {
fn report(self) -> i32 {
unsafe {
NUM = 6 * 7 + 1 + (1u8 == 1u8) as u8; // 44
*NUM_REF as i32
}
}
}
trait SomeTrait {
fn object_safe(&self);
}
impl SomeTrait for &'static str {
fn object_safe(&self) {
unsafe {
puts(*self as *const str as *const u8);
}
}
}
struct NoisyDrop {
text: &'static str,
inner: NoisyDropInner,
}
struct NoisyDropInner;
impl Drop for NoisyDrop {
fn drop(&mut self) {
unsafe {
puts(self.text as *const str as *const u8);
}
}
}
impl Drop for NoisyDropInner {
fn drop(&mut self) {
unsafe {
puts("Inner got dropped!\0" as *const str as *const u8);
}
}
}
impl SomeTrait for NoisyDrop {
fn object_safe(&self) {}
}
enum Ordering {
Less = -1,
Equal = 0,
Greater = 1,
}
#[lang = "start"]
fn start<T: Termination + 'static>(
main: fn() -> T,
argc: isize,
argv: *const *const u8,
) -> isize {
if argc == 3 {
unsafe { puts(*argv); }
unsafe { puts(*((argv as usize + intrinsics::size_of::<*const u8>()) as *const *const u8)); }
unsafe { puts(*((argv as usize + 2 * intrinsics::size_of::<*const u8>()) as *const *const u8)); }
}
main().report();
0
}
static mut NUM: u8 = 6 * 7;
static NUM_REF: &'static u8 = unsafe { &NUM };
macro_rules! assert {
($e:expr) => {
if !$e {
panic(stringify!(! $e));
}
};
}
macro_rules! assert_eq {
($l:expr, $r: expr) => {
if $l != $r {
panic(stringify!($l != $r));
}
}
}
struct Unique<T: ?Sized> {
pointer: *const T,
_marker: PhantomData<T>,
}
impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
unsafe fn zeroed<T>() -> T {
let mut uninit = MaybeUninit { uninit: () };
intrinsics::write_bytes(&mut uninit.value.value as *mut T, 0, 1);
uninit.value.value
}
fn take_f32(_f: f32) {}
fn take_unique(_u: Unique<()>) {}
fn return_u128_pair() -> (u128, u128) {
(0, 0)
}
fn call_return_u128_pair() {
return_u128_pair();
}
fn main() {
take_unique(Unique {
pointer: 0 as *const (),
_marker: PhantomData,
});
take_f32(0.1);
//call_return_u128_pair();
let slice = &[0, 1] as &[i32];
let slice_ptr = slice as *const [i32] as *const i32;
assert_eq!(slice_ptr as usize % 4, 0);
//return;
unsafe {
printf("Hello %s\n\0" as *const str as *const i8, "printf\0" as *const str as *const i8);
let hello: &[u8] = b"Hello\0" as &[u8; 6];
let ptr: *const u8 = hello as *const [u8] as *const u8;
puts(ptr);
let world: Box<&str> = box "World!\0";
puts(*world as *const str as *const u8);
world as Box<dyn SomeTrait>;
assert_eq!(intrinsics::bitreverse(0b10101000u8), 0b00010101u8);
assert_eq!(intrinsics::bswap(0xabu8), 0xabu8);
assert_eq!(intrinsics::bswap(0xddccu16), 0xccddu16);
assert_eq!(intrinsics::bswap(0xffee_ddccu32), 0xccdd_eeffu32);
assert_eq!(intrinsics::bswap(0x1234_5678_ffee_ddccu64), 0xccdd_eeff_7856_3412u64);
assert_eq!(intrinsics::size_of_val(hello) as u8, 6);
let chars = &['C', 'h', 'a', 'r', 's'];
let chars = chars as &[char];
assert_eq!(intrinsics::size_of_val(chars) as u8, 4 * 5);
let a: &dyn SomeTrait = &"abc\0";
a.object_safe();
assert_eq!(intrinsics::size_of_val(a) as u8, 16);
assert_eq!(intrinsics::size_of_val(&0u32) as u8, 4);
assert_eq!(intrinsics::min_align_of::<u16>() as u8, 2);
assert_eq!(intrinsics::min_align_of_val(&a) as u8, intrinsics::min_align_of::<&str>() as u8);
assert!(!intrinsics::needs_drop::<u8>());
assert!(intrinsics::needs_drop::<NoisyDrop>());
Unique {
pointer: 0 as *const &str,
_marker: PhantomData,
} as Unique<dyn SomeTrait>;
struct MyDst<T: ?Sized>(T);
intrinsics::size_of_val(&MyDst([0u8; 4]) as &MyDst<[u8]>);
struct Foo {
x: u8,
y: !,
}
unsafe fn uninitialized<T>() -> T {
MaybeUninit { uninit: () }.value.value
}
zeroed::<(u8, u8)>();
#[allow(unreachable_code)]
{
if false {
zeroed::<!>();
zeroed::<Foo>();
uninitialized::<Foo>();
}
}
}
let _ = box NoisyDrop {
text: "Boxed outer got dropped!\0",
inner: NoisyDropInner,
} as Box<dyn SomeTrait>;
const FUNC_REF: Option<fn()> = Some(main);
match FUNC_REF {
Some(_) => {},
None => assert!(false),
}
match Ordering::Less {
Ordering::Less => {},
_ => assert!(false),
}
[NoisyDropInner, NoisyDropInner];
let x = &[0u32, 42u32] as &[u32];
match x {
[] => assert_eq!(0u32, 1),
[_, ref y @ ..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
}
assert_eq!(((|()| 42u8) as fn(()) -> u8)(()), 42);
extern {
#[linkage = "weak"]
static ABC: *const u8;
}
{
extern {
#[linkage = "weak"]
static ABC: *const u8;
}
}
// TODO: not sure about this assert. ABC is not defined, so should it be really 0?
//unsafe { assert_eq!(ABC as usize, 0); }
&mut (|| Some(0 as *const ())) as &mut dyn FnMut() -> Option<*const ()>;
let f = 1000.0;
assert_eq!(f as u8, 255);
let f2 = -1000.0;
assert_eq!(f2 as i8, -128);
assert_eq!(f2 as u8, 0);
static ANOTHER_STATIC: &u8 = &A_STATIC;
assert_eq!(*ANOTHER_STATIC, 42);
check_niche_behavior();
extern "C" {
type ExternType;
}
struct ExternTypeWrapper {
_a: ExternType,
}
let nullptr = 0 as *const ();
let extern_nullptr = nullptr as *const ExternTypeWrapper;
extern_nullptr as *const ();
let slice_ptr = &[] as *const [u8];
slice_ptr as *const u8;
#[cfg(not(jit))]
test_tls();
}
#[repr(C)]
enum c_void {
_1,
_2,
}
type c_int = i32;
type c_ulong = u64;
type pthread_t = c_ulong;
#[repr(C)]
struct pthread_attr_t {
__size: [u64; 7],
}
#[link(name = "pthread")]
extern "C" {
fn pthread_attr_init(attr: *mut pthread_attr_t) -> c_int;
fn pthread_create(
native: *mut pthread_t,
attr: *const pthread_attr_t,
f: extern "C" fn(_: *mut c_void) -> *mut c_void,
value: *mut c_void
) -> c_int;
fn pthread_join(
native: pthread_t,
value: *mut *mut c_void
) -> c_int;
}
#[thread_local]
#[cfg(not(jit))]
static mut TLS: u8 = 42;
#[cfg(not(jit))]
extern "C" fn mutate_tls(_: *mut c_void) -> *mut c_void {
unsafe { TLS = 0; }
0 as *mut c_void
}
#[cfg(not(jit))]
fn test_tls() {
unsafe {
let mut attr: pthread_attr_t = zeroed();
let mut thread: pthread_t = 0;
assert_eq!(TLS, 42);
if pthread_attr_init(&mut attr) != 0 {
assert!(false);
}
if pthread_create(&mut thread, &attr, mutate_tls, 0 as *mut c_void) != 0 {
assert!(false);
}
let mut res = 0 as *mut c_void;
pthread_join(thread, &mut res);
// TLS of main thread must not have been changed by the other thread.
assert_eq!(TLS, 42);
puts("TLS works!\n\0" as *const str as *const u8);
}
}
// Copied ui/issues/issue-61696.rs
pub enum Infallible {}
// The check that the `bool` field of `V1` is encoding a "niche variant"
// (i.e. not `V1`, so `V3` or `V4`) used to be mathematically incorrect,
// causing valid `V1` values to be interpreted as other variants.
pub enum E1 {
V1 { f: bool },
V2 { f: Infallible },
V3,
V4,
}
// Computing the discriminant used to be done using the niche type (here `u8`,
// from the `bool` field of `V1`), overflowing for variants with large enough
// indices (`V3` and `V4`), causing them to be interpreted as other variants.
pub enum E2<X> {
V1 { f: bool },
/*_00*/ _01(X), _02(X), _03(X), _04(X), _05(X), _06(X), _07(X),
_08(X), _09(X), _0A(X), _0B(X), _0C(X), _0D(X), _0E(X), _0F(X),
_10(X), _11(X), _12(X), _13(X), _14(X), _15(X), _16(X), _17(X),
_18(X), _19(X), _1A(X), _1B(X), _1C(X), _1D(X), _1E(X), _1F(X),
_20(X), _21(X), _22(X), _23(X), _24(X), _25(X), _26(X), _27(X),
_28(X), _29(X), _2A(X), _2B(X), _2C(X), _2D(X), _2E(X), _2F(X),
_30(X), _31(X), _32(X), _33(X), _34(X), _35(X), _36(X), _37(X),
_38(X), _39(X), _3A(X), _3B(X), _3C(X), _3D(X), _3E(X), _3F(X),
_40(X), _41(X), _42(X), _43(X), _44(X), _45(X), _46(X), _47(X),
_48(X), _49(X), _4A(X), _4B(X), _4C(X), _4D(X), _4E(X), _4F(X),
_50(X), _51(X), _52(X), _53(X), _54(X), _55(X), _56(X), _57(X),
_58(X), _59(X), _5A(X), _5B(X), _5C(X), _5D(X), _5E(X), _5F(X),
_60(X), _61(X), _62(X), _63(X), _64(X), _65(X), _66(X), _67(X),
_68(X), _69(X), _6A(X), _6B(X), _6C(X), _6D(X), _6E(X), _6F(X),
_70(X), _71(X), _72(X), _73(X), _74(X), _75(X), _76(X), _77(X),
_78(X), _79(X), _7A(X), _7B(X), _7C(X), _7D(X), _7E(X), _7F(X),
_80(X), _81(X), _82(X), _83(X), _84(X), _85(X), _86(X), _87(X),
_88(X), _89(X), _8A(X), _8B(X), _8C(X), _8D(X), _8E(X), _8F(X),
_90(X), _91(X), _92(X), _93(X), _94(X), _95(X), _96(X), _97(X),
_98(X), _99(X), _9A(X), _9B(X), _9C(X), _9D(X), _9E(X), _9F(X),
_A0(X), _A1(X), _A2(X), _A3(X), _A4(X), _A5(X), _A6(X), _A7(X),
_A8(X), _A9(X), _AA(X), _AB(X), _AC(X), _AD(X), _AE(X), _AF(X),
_B0(X), _B1(X), _B2(X), _B3(X), _B4(X), _B5(X), _B6(X), _B7(X),
_B8(X), _B9(X), _BA(X), _BB(X), _BC(X), _BD(X), _BE(X), _BF(X),
_C0(X), _C1(X), _C2(X), _C3(X), _C4(X), _C5(X), _C6(X), _C7(X),
_C8(X), _C9(X), _CA(X), _CB(X), _CC(X), _CD(X), _CE(X), _CF(X),
_D0(X), _D1(X), _D2(X), _D3(X), _D4(X), _D5(X), _D6(X), _D7(X),
_D8(X), _D9(X), _DA(X), _DB(X), _DC(X), _DD(X), _DE(X), _DF(X),
_E0(X), _E1(X), _E2(X), _E3(X), _E4(X), _E5(X), _E6(X), _E7(X),
_E8(X), _E9(X), _EA(X), _EB(X), _EC(X), _ED(X), _EE(X), _EF(X),
_F0(X), _F1(X), _F2(X), _F3(X), _F4(X), _F5(X), _F6(X), _F7(X),
_F8(X), _F9(X), _FA(X), _FB(X), _FC(X), _FD(X), _FE(X), _FF(X),
V3,
V4,
}
fn check_niche_behavior () {
if let E1::V2 { .. } = (E1::V1 { f: true }) {
intrinsics::abort();
}
if let E2::V1 { .. } = E2::V3::<Infallible> {
intrinsics::abort();
}
}

37
compiler/rustc_codegen_gcc/example/mod_bench.rs Normal file
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@ -0,0 +1,37 @@
#![feature(start, box_syntax, core_intrinsics, lang_items)]
#![no_std]
#[link(name = "c")]
extern {}
#[panic_handler]
fn panic_handler(_: &core::panic::PanicInfo) -> ! {
unsafe {
core::intrinsics::abort();
}
}
#[lang="eh_personality"]
fn eh_personality(){}
// Required for rustc_codegen_llvm
#[no_mangle]
unsafe extern "C" fn _Unwind_Resume() {
core::intrinsics::unreachable();
}
#[start]
fn main(_argc: isize, _argv: *const *const u8) -> isize {
for i in 2..100_000_000 {
black_box((i + 1) % i);
}
0
}
#[inline(never)]
fn black_box(i: u32) {
if i != 1 {
unsafe { core::intrinsics::abort(); }
}
}

279
compiler/rustc_codegen_gcc/example/std_example.rs Normal file
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@ -0,0 +1,279 @@
#![feature(core_intrinsics, generators, generator_trait, is_sorted)]
use std::arch::x86_64::*;
use std::io::Write;
use std::ops::Generator;
extern {
pub fn printf(format: *const i8, ...) -> i32;
}
fn main() {
let mutex = std::sync::Mutex::new(());
let _guard = mutex.lock().unwrap();
let _ = ::std::iter::repeat('a' as u8).take(10).collect::<Vec<_>>();
let stderr = ::std::io::stderr();
let mut stderr = stderr.lock();
// FIXME: this thread panics.
std::thread::spawn(move || {
println!("Hello from another thread!");
});
writeln!(stderr, "some {} text", "<unknown>").unwrap();
let _ = std::process::Command::new("true").env("c", "d").spawn();
println!("cargo:rustc-link-lib=z");
static ONCE: std::sync::Once = std::sync::Once::new();
ONCE.call_once(|| {});
let _eq = LoopState::Continue(()) == LoopState::Break(());
// Make sure ByValPair values with differently sized components are correctly passed
map(None::<(u8, Box<Instruction>)>);
println!("{}", 2.3f32.exp());
println!("{}", 2.3f32.exp2());
println!("{}", 2.3f32.abs());
println!("{}", 2.3f32.sqrt());
println!("{}", 2.3f32.floor());
println!("{}", 2.3f32.ceil());
println!("{}", 2.3f32.min(1.0));
println!("{}", 2.3f32.max(1.0));
println!("{}", 2.3f32.powi(2));
println!("{}", 2.3f32.log2());
assert_eq!(2.3f32.copysign(-1.0), -2.3f32);
println!("{}", 2.3f32.powf(2.0));
assert_eq!(-128i8, (-128i8).saturating_sub(1));
assert_eq!(127i8, 127i8.saturating_sub(-128));
assert_eq!(-128i8, (-128i8).saturating_add(-128));
assert_eq!(127i8, 127i8.saturating_add(1));
assert_eq!(-32768i16, (-32768i16).saturating_add(-32768));
assert_eq!(32767i16, 32767i16.saturating_add(1));
/*assert_eq!(0b0000000000000000000000000010000010000000000000000000000000000000_0000000000100000000000000000000000001000000000000100000000000000u128.leading_zeros(), 26);
assert_eq!(0b0000000000000000000000000010000000000000000000000000000000000000_0000000000000000000000000000000000001000000000000000000010000000u128.trailing_zeros(), 7);
let _d = 0i128.checked_div(2i128);
let _d = 0u128.checked_div(2u128);
assert_eq!(1u128 + 2, 3);
assert_eq!(0b100010000000000000000000000000000u128 >> 10, 0b10001000000000000000000u128);
assert_eq!(0xFEDCBA987654321123456789ABCDEFu128 >> 64, 0xFEDCBA98765432u128);
assert_eq!(0xFEDCBA987654321123456789ABCDEFu128 as i128 >> 64, 0xFEDCBA98765432i128);
let tmp = 353985398u128;
assert_eq!(tmp * 932490u128, 330087843781020u128);
let tmp = -0x1234_5678_9ABC_DEF0i64;
assert_eq!(tmp as i128, -0x1234_5678_9ABC_DEF0i128);
// Check that all u/i128 <-> float casts work correctly.
let houndred_u128 = 100u128;
let houndred_i128 = 100i128;
let houndred_f32 = 100.0f32;
let houndred_f64 = 100.0f64;
assert_eq!(houndred_u128 as f32, 100.0);
assert_eq!(houndred_u128 as f64, 100.0);
assert_eq!(houndred_f32 as u128, 100);
assert_eq!(houndred_f64 as u128, 100);
assert_eq!(houndred_i128 as f32, 100.0);
assert_eq!(houndred_i128 as f64, 100.0);
assert_eq!(houndred_f32 as i128, 100);
assert_eq!(houndred_f64 as i128, 100);*/
let _a = 1u32 << 2u8;
let empty: [i32; 0] = [];
assert!(empty.is_sorted());
println!("{:?}", std::intrinsics::caller_location());
/*unsafe {
test_simd();
}*/
Box::pin(move |mut _task_context| {
yield ();
}).as_mut().resume(0);
println!("End");
}
/*#[target_feature(enable = "sse2")]
unsafe fn test_simd() {
let x = _mm_setzero_si128();
let y = _mm_set1_epi16(7);
let or = _mm_or_si128(x, y);
let cmp_eq = _mm_cmpeq_epi8(y, y);
let cmp_lt = _mm_cmplt_epi8(y, y);
/*assert_eq!(std::mem::transmute::<_, [u16; 8]>(or), [7, 7, 7, 7, 7, 7, 7, 7]);
assert_eq!(std::mem::transmute::<_, [u16; 8]>(cmp_eq), [0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff]);
assert_eq!(std::mem::transmute::<_, [u16; 8]>(cmp_lt), [0, 0, 0, 0, 0, 0, 0, 0]);
test_mm_slli_si128();
test_mm_movemask_epi8();
test_mm256_movemask_epi8();
test_mm_add_epi8();
test_mm_add_pd();
test_mm_cvtepi8_epi16();
test_mm_cvtsi128_si64();
// FIXME(#666) implement `#[rustc_arg_required_const(..)]` support
//test_mm_extract_epi8();
let mask1 = _mm_movemask_epi8(dbg!(_mm_setr_epi8(255u8 as i8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)));
assert_eq!(mask1, 1);*/
}*/
/*#[target_feature(enable = "sse2")]
unsafe fn test_mm_slli_si128() {
#[rustfmt::skip]
let a = _mm_setr_epi8(
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
);
let r = _mm_slli_si128(a, 1);
let e = _mm_setr_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
assert_eq_m128i(r, e);
#[rustfmt::skip]
let a = _mm_setr_epi8(
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
);
let r = _mm_slli_si128(a, 15);
let e = _mm_setr_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
assert_eq_m128i(r, e);
#[rustfmt::skip]
let a = _mm_setr_epi8(
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
);
let r = _mm_slli_si128(a, 16);
assert_eq_m128i(r, _mm_set1_epi8(0));
#[rustfmt::skip]
let a = _mm_setr_epi8(
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
);
let r = _mm_slli_si128(a, -1);
assert_eq_m128i(_mm_set1_epi8(0), r);
#[rustfmt::skip]
let a = _mm_setr_epi8(
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
);
let r = _mm_slli_si128(a, -0x80000000);
assert_eq_m128i(r, _mm_set1_epi8(0));
}
#[target_feature(enable = "sse2")]
unsafe fn test_mm_movemask_epi8() {
#[rustfmt::skip]
let a = _mm_setr_epi8(
0b1000_0000u8 as i8, 0b0, 0b1000_0000u8 as i8, 0b01,
0b0101, 0b1111_0000u8 as i8, 0, 0,
0, 0, 0b1111_0000u8 as i8, 0b0101,
0b01, 0b1000_0000u8 as i8, 0b0, 0b1000_0000u8 as i8,
);
let r = _mm_movemask_epi8(a);
assert_eq!(r, 0b10100100_00100101);
}
#[target_feature(enable = "avx2")]
unsafe fn test_mm256_movemask_epi8() {
let a = _mm256_set1_epi8(-1);
let r = _mm256_movemask_epi8(a);
let e = -1;
assert_eq!(r, e);
}
#[target_feature(enable = "sse2")]
unsafe fn test_mm_add_epi8() {
let a = _mm_setr_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
#[rustfmt::skip]
let b = _mm_setr_epi8(
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
);
let r = _mm_add_epi8(a, b);
#[rustfmt::skip]
let e = _mm_setr_epi8(
16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46,
);
assert_eq_m128i(r, e);
}
#[target_feature(enable = "sse2")]
unsafe fn test_mm_add_pd() {
let a = _mm_setr_pd(1.0, 2.0);
let b = _mm_setr_pd(5.0, 10.0);
let r = _mm_add_pd(a, b);
assert_eq_m128d(r, _mm_setr_pd(6.0, 12.0));
}
fn assert_eq_m128i(x: std::arch::x86_64::__m128i, y: std::arch::x86_64::__m128i) {
unsafe {
assert_eq!(std::mem::transmute::<_, [u8; 16]>(x), std::mem::transmute::<_, [u8; 16]>(y));
}
}
#[target_feature(enable = "sse2")]
pub unsafe fn assert_eq_m128d(a: __m128d, b: __m128d) {
if _mm_movemask_pd(_mm_cmpeq_pd(a, b)) != 0b11 {
panic!("{:?} != {:?}", a, b);
}
}
#[target_feature(enable = "sse2")]
unsafe fn test_mm_cvtsi128_si64() {
let r = _mm_cvtsi128_si64(std::mem::transmute::<[i64; 2], _>([5, 0]));
assert_eq!(r, 5);
}
#[target_feature(enable = "sse4.1")]
unsafe fn test_mm_cvtepi8_epi16() {
let a = _mm_set1_epi8(10);
let r = _mm_cvtepi8_epi16(a);
let e = _mm_set1_epi16(10);
assert_eq_m128i(r, e);
let a = _mm_set1_epi8(-10);
let r = _mm_cvtepi8_epi16(a);
let e = _mm_set1_epi16(-10);
assert_eq_m128i(r, e);
}
#[target_feature(enable = "sse4.1")]
unsafe fn test_mm_extract_epi8() {
#[rustfmt::skip]
let a = _mm_setr_epi8(
-1, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15
);
let r1 = _mm_extract_epi8(a, 0);
let r2 = _mm_extract_epi8(a, 19);
assert_eq!(r1, 0xFF);
assert_eq!(r2, 3);
}*/
#[derive(PartialEq)]
enum LoopState {
Continue(()),
Break(())
}
pub enum Instruction {
Increment,
Loop,
}
fn map(a: Option<(u8, Box<Instruction>)>) -> Option<Box<Instruction>> {
match a {
None => None,
Some((_, instr)) => Some(instr),
}
}

97
compiler/rustc_codegen_gcc/example/subslice-patterns-const-eval.rs Normal file
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@ -0,0 +1,97 @@
// Based on https://github.com/rust-lang/rust/blob/c5840f9d252c2f5cc16698dbf385a29c5de3ca07/src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs
// Test that array subslice patterns are correctly handled in const evaluation.
// run-pass
#[derive(PartialEq, Debug, Clone)]
struct N(u8);
#[derive(PartialEq, Debug, Clone)]
struct Z;
macro_rules! n {
($($e:expr),* $(,)?) => {
[$(N($e)),*]
}
}
// This macro has an unused variable so that it can be repeated base on the
// number of times a repeated variable (`$e` in `z`) occurs.
macro_rules! zed {
($e:expr) => { Z }
}
macro_rules! z {
($($e:expr),* $(,)?) => {
[$(zed!($e)),*]
}
}
// Compare constant evaluation and runtime evaluation of a given expression.
macro_rules! compare_evaluation {
($e:expr, $t:ty $(,)?) => {{
const CONST_EVAL: $t = $e;
const fn const_eval() -> $t { $e }
static CONST_EVAL2: $t = const_eval();
let runtime_eval = $e;
assert_eq!(CONST_EVAL, runtime_eval);
assert_eq!(CONST_EVAL2, runtime_eval);
}}
}
// Repeat `$test`, substituting the given macro variables with the given
// identifiers.
//
// For example:
//
// repeat! {
// ($name); X; Y:
// struct $name;
// }
//
// Expands to:
//
// struct X; struct Y;
//
// This is used to repeat the tests using both the `N` and `Z`
// types.
macro_rules! repeat {
(($($dollar:tt $placeholder:ident)*); $($($values:ident),+);*: $($test:tt)*) => {
macro_rules! single {
($($dollar $placeholder:ident),*) => { $($test)* }
}
$(single!($($values),+);)*
}
}
fn main() {
repeat! {
($arr $Ty); n, N; z, Z:
compare_evaluation!({ let [_, x @ .., _] = $arr!(1, 2, 3, 4); x }, [$Ty; 2]);
compare_evaluation!({ let [_, ref x @ .., _] = $arr!(1, 2, 3, 4); x }, &'static [$Ty; 2]);
compare_evaluation!({ let [_, x @ .., _] = &$arr!(1, 2, 3, 4); x }, &'static [$Ty; 2]);
compare_evaluation!({ let [_, _, x @ .., _, _] = $arr!(1, 2, 3, 4); x }, [$Ty; 0]);
compare_evaluation!(
{ let [_, _, ref x @ .., _, _] = $arr!(1, 2, 3, 4); x },
&'static [$Ty; 0],
);
compare_evaluation!(
{ let [_, _, x @ .., _, _] = &$arr!(1, 2, 3, 4); x },
&'static [$Ty; 0],
);
compare_evaluation!({ let [_, .., x] = $arr!(1, 2, 3, 4); x }, $Ty);
compare_evaluation!({ let [_, .., ref x] = $arr!(1, 2, 3, 4); x }, &'static $Ty);
compare_evaluation!({ let [_, _y @ .., x] = &$arr!(1, 2, 3, 4); x }, &'static $Ty);
}
compare_evaluation!({ let [_, .., N(x)] = n!(1, 2, 3, 4); x }, u8);
compare_evaluation!({ let [_, .., N(ref x)] = n!(1, 2, 3, 4); x }, &'static u8);
compare_evaluation!({ let [_, .., N(x)] = &n!(1, 2, 3, 4); x }, &'static u8);
compare_evaluation!({ let [N(x), .., _] = n!(1, 2, 3, 4); x }, u8);
compare_evaluation!({ let [N(ref x), .., _] = n!(1, 2, 3, 4); x }, &'static u8);
compare_evaluation!({ let [N(x), .., _] = &n!(1, 2, 3, 4); x }, &'static u8);
}

40
compiler/rustc_codegen_gcc/example/track-caller-attribute.rs Normal file
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@ -0,0 +1,40 @@
// Based on https://github.com/anp/rust/blob/175631311716d7dfeceec40d2587cde7142ffa8c/src/test/ui/rfc-2091-track-caller/track-caller-attribute.rs
// run-pass
use std::panic::Location;
#[track_caller]
fn tracked() -> &'static Location<'static> {
Location::caller()
}
fn nested_intrinsic() -> &'static Location<'static> {
Location::caller()
}
fn nested_tracked() -> &'static Location<'static> {
tracked()
}
fn main() {
let location = Location::caller();
assert_eq!(location.file(), file!());
assert_eq!(location.line(), 21);
assert_eq!(location.column(), 20);
let tracked = tracked();
assert_eq!(tracked.file(), file!());
assert_eq!(tracked.line(), 26);
assert_eq!(tracked.column(), 19);
let nested = nested_intrinsic();
assert_eq!(nested.file(), file!());
assert_eq!(nested.line(), 13);
assert_eq!(nested.column(), 5);
let contained = nested_tracked();
assert_eq!(contained.file(), file!());
assert_eq!(contained.line(), 17);
assert_eq!(contained.column(), 5);
}

0
compiler/rustc_codegen_gcc/gcc_path Normal file
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63
compiler/rustc_codegen_gcc/patches/0022-core-Disable-not-compiling-tests.patch Normal file
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@ -0,0 +1,63 @@
From f6befc4bb51d84f5f1cf35938a168c953d421350 Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Sun, 24 Nov 2019 15:10:23 +0100
Subject: [PATCH] [core] Disable not compiling tests
---
library/core/tests/Cargo.toml | 8 ++++++++
library/core/tests/num/flt2dec/mod.rs | 1 -
library/core/tests/num/int_macros.rs | 2 ++
library/core/tests/num/uint_macros.rs | 2 ++
library/core/tests/ptr.rs | 2 ++
library/core/tests/slice.rs | 2 ++
6 files changed, 16 insertions(+), 1 deletion(-)
create mode 100644 library/core/tests/Cargo.toml
diff --git a/library/core/tests/Cargo.toml b/library/core/tests/Cargo.toml
new file mode 100644
index 0000000..46fd999
--- /dev/null
+++ b/library/core/tests/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "core"
+version = "0.0.0"
+edition = "2018"
+
+[lib]
+name = "coretests"
+path = "lib.rs"
diff --git a/library/core/tests/num/flt2dec/mod.rs b/library/core/tests/num/flt2dec/mod.rs
index a35897e..f0bf645 100644
--- a/library/core/tests/num/flt2dec/mod.rs
+++ b/library/core/tests/num/flt2dec/mod.rs
@@ -13,7 +13,6 @@ mod strategy {
mod dragon;
mod grisu;
}
-mod random;
pub fn decode_finite<T: DecodableFloat>(v: T) -> Decoded {
match decode(v).1 {
diff --git a/library/core/tests/slice.rs b/library/core/tests/slice.rs
index 6609bc3..241b497 100644
--- a/library/core/tests/slice.rs
+++ b/library/core/tests/slice.rs
@@ -1209,6 +1209,7 @@ fn brute_force_rotate_test_1() {
}
}
+/*
#[test]
#[cfg(not(target_arch = "wasm32"))]
fn sort_unstable() {
@@ -1394,6 +1395,7 @@ fn partition_at_index() {
v.select_nth_unstable(0);
assert!(v == [0xDEADBEEF]);
}
+*/
#[test]
#[should_panic(expected = "index 0 greater than length of slice")]
--
2.21.0 (Apple Git-122)

49
compiler/rustc_codegen_gcc/patches/0023-core-Ignore-failing-tests.patch Normal file
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@ -0,0 +1,49 @@
From dd82e95c9de212524e14fc60155de1ae40156dfc Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Sun, 24 Nov 2019 15:34:06 +0100
Subject: [PATCH] [core] Ignore failing tests
---
library/core/tests/iter.rs | 4 ++++
library/core/tests/num/bignum.rs | 10 ++++++++++
library/core/tests/num/mod.rs | 5 +++--
library/core/tests/time.rs | 1 +
4 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/library/core/tests/array.rs b/library/core/tests/array.rs
index 4bc44e9..8e3c7a4 100644
--- a/library/core/tests/array.rs
+++ b/library/core/tests/array.rs
@@ -242,6 +242,7 @@ fn iterator_drops() {
assert_eq!(i.get(), 5);
}
+/*
// This test does not work on targets without panic=unwind support.
// To work around this problem, test is marked is should_panic, so it will
// be automagically skipped on unsuitable targets, such as
@@ -283,6 +284,7 @@ fn array_default_impl_avoids_leaks_on_panic() {
assert_eq!(COUNTER.load(Relaxed), 0);
panic!("test succeeded")
}
+*/
#[test]
fn empty_array_is_always_default() {
@@ -304,6 +304,7 @@ fn array_map() {
assert_eq!(b, [1, 2, 3]);
}
+/*
// See note on above test for why `should_panic` is used.
#[test]
#[should_panic(expected = "test succeeded")]
@@ -332,6 +333,7 @@ fn array_map_drop_safety() {
assert_eq!(DROPPED.load(Ordering::SeqCst), num_to_create);
panic!("test succeeded")
}
+*/
#[test]
fn cell_allows_array_cycle() {
-- 2.21.0 (Apple Git-122)

22
compiler/rustc_codegen_gcc/prepare.sh Executable file
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@ -0,0 +1,22 @@
#!/bin/bash --verbose
set -e
source prepare_build.sh
cargo install hyperfine || echo "Skipping hyperfine install"
git clone https://github.com/rust-lang/regex.git || echo "rust-lang/regex has already been cloned"
pushd regex
git checkout -- .
git checkout 341f207c1071f7290e3f228c710817c280c8dca1
popd
git clone https://github.com/ebobby/simple-raytracer || echo "ebobby/simple-raytracer has already been cloned"
pushd simple-raytracer
git checkout -- .
git checkout 804a7a21b9e673a482797aa289a18ed480e4d813
# build with cg_llvm for perf comparison
cargo build
mv target/debug/main raytracer_cg_llvm
popd

5
compiler/rustc_codegen_gcc/prepare_build.sh Executable file
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@ -0,0 +1,5 @@
#!/bin/bash --verbose
set -e
rustup component add rust-src rustc-dev llvm-tools-preview
./build_sysroot/prepare_sysroot_src.sh

1
compiler/rustc_codegen_gcc/rust-toolchain Normal file
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@ -0,0 +1 @@
nightly-2021-07-21

29
compiler/rustc_codegen_gcc/rustup.sh Executable file
View File

@ -0,0 +1,29 @@
#!/bin/bash
set -e
case $1 in
"prepare")
TOOLCHAIN=$(date +%Y-%m-%d)
echo "=> Installing new nightly"
rustup toolchain install --profile minimal nightly-${TOOLCHAIN} # Sanity check to see if the nightly exists
echo nightly-${TOOLCHAIN} > rust-toolchain
echo "=> Uninstalling all old nighlies"
for nightly in $(rustup toolchain list | grep nightly | grep -v $TOOLCHAIN | grep -v nightly-x86_64); do
rustup toolchain uninstall $nightly
done
./clean_all.sh
./prepare.sh
;;
"commit")
git add rust-toolchain
git commit -m "Rustup to $(rustc -V)"
;;
*)
echo "Unknown command '$1'"
echo "Usage: ./rustup.sh prepare|commit"
;;
esac

286
compiler/rustc_codegen_gcc/src/abi.rs Normal file
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@ -0,0 +1,286 @@
use gccjit::{ToRValue, Type};
use rustc_codegen_ssa::traits::{AbiBuilderMethods, BaseTypeMethods};
use rustc_middle::bug;
use rustc_middle::ty::Ty;
use rustc_target::abi::call::{CastTarget, FnAbi, PassMode, Reg, RegKind};
use crate::builder::Builder;
use crate::context::CodegenCx;
use crate::intrinsic::ArgAbiExt;
use crate::type_of::LayoutGccExt;
impl<'a, 'gcc, 'tcx> AbiBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
fn apply_attrs_callsite(&mut self, _fn_abi: &FnAbi<'tcx, Ty<'tcx>>, _callsite: Self::Value) {
// TODO
//fn_abi.apply_attrs_callsite(self, callsite)
}
fn get_param(&self, index: usize) -> Self::Value {
self.cx.current_func.borrow().expect("current func")
.get_param(index as i32)
.to_rvalue()
}
}
impl GccType for CastTarget {
fn gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, '_>) -> Type<'gcc> {
let rest_gcc_unit = self.rest.unit.gcc_type(cx);
let (rest_count, rem_bytes) =
if self.rest.unit.size.bytes() == 0 {
(0, 0)
}
else {
(self.rest.total.bytes() / self.rest.unit.size.bytes(), self.rest.total.bytes() % self.rest.unit.size.bytes())
};
if self.prefix.iter().all(|x| x.is_none()) {
// Simplify to a single unit when there is no prefix and size <= unit size
if self.rest.total <= self.rest.unit.size {
return rest_gcc_unit;
}
// Simplify to array when all chunks are the same size and type
if rem_bytes == 0 {
return cx.type_array(rest_gcc_unit, rest_count);
}
}
// Create list of fields in the main structure
let mut args: Vec<_> = self
.prefix
.iter()
.flat_map(|option_kind| {
option_kind.map(|kind| Reg { kind, size: self.prefix_chunk_size }.gcc_type(cx))
})
.chain((0..rest_count).map(|_| rest_gcc_unit))
.collect();
// Append final integer
if rem_bytes != 0 {
// Only integers can be really split further.
assert_eq!(self.rest.unit.kind, RegKind::Integer);
args.push(cx.type_ix(rem_bytes * 8));
}
cx.type_struct(&args, false)
}
}
pub trait GccType {
fn gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, '_>) -> Type<'gcc>;
}
impl GccType for Reg {
fn gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, '_>) -> Type<'gcc> {
match self.kind {
RegKind::Integer => cx.type_ix(self.size.bits()),
RegKind::Float => {
match self.size.bits() {
32 => cx.type_f32(),
64 => cx.type_f64(),
_ => bug!("unsupported float: {:?}", self),
}
},
RegKind::Vector => unimplemented!(), //cx.type_vector(cx.type_i8(), self.size.bytes()),
}
}
}
pub trait FnAbiGccExt<'gcc, 'tcx> {
// TODO: return a function pointer type instead?
fn gcc_type(&self, cx: &CodegenCx<'gcc, 'tcx>) -> (Type<'gcc>, Vec<Type<'gcc>>, bool);
fn ptr_to_gcc_type(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
/*fn llvm_cconv(&self) -> llvm::CallConv;
fn apply_attrs_llfn(&self, cx: &CodegenCx<'ll, 'tcx>, llfn: &'ll Value);
fn apply_attrs_callsite(&self, bx: &mut Builder<'a, 'll, 'tcx>, callsite: &'ll Value);*/
}
impl<'gcc, 'tcx> FnAbiGccExt<'gcc, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
fn gcc_type(&self, cx: &CodegenCx<'gcc, 'tcx>) -> (Type<'gcc>, Vec<Type<'gcc>>, bool) {
let args_capacity: usize = self.args.iter().map(|arg|
if arg.pad.is_some() {
1
}
else {
0
} +
if let PassMode::Pair(_, _) = arg.mode {
2
} else {
1
}
).sum();
let mut argument_tys = Vec::with_capacity(
if let PassMode::Indirect { .. } = self.ret.mode {
1
}
else {
0
} + args_capacity,
);
let return_ty =
match self.ret.mode {
PassMode::Ignore => cx.type_void(),
PassMode::Direct(_) | PassMode::Pair(..) => self.ret.layout.immediate_gcc_type(cx),
PassMode::Cast(cast) => cast.gcc_type(cx),
PassMode::Indirect { .. } => {
argument_tys.push(cx.type_ptr_to(self.ret.memory_ty(cx)));
cx.type_void()
}
};
for arg in &self.args {
// add padding
if let Some(ty) = arg.pad {
argument_tys.push(ty.gcc_type(cx));
}
let arg_ty = match arg.mode {
PassMode::Ignore => continue,
PassMode::Direct(_) => arg.layout.immediate_gcc_type(cx),
PassMode::Pair(..) => {
argument_tys.push(arg.layout.scalar_pair_element_gcc_type(cx, 0, true));
argument_tys.push(arg.layout.scalar_pair_element_gcc_type(cx, 1, true));
continue;
}
PassMode::Indirect { extra_attrs: Some(_), .. } => {
/*let ptr_ty = cx.tcx.mk_mut_ptr(arg.layout.ty);
let ptr_layout = cx.layout_of(ptr_ty);
argument_tys.push(ptr_layout.scalar_pair_element_gcc_type(cx, 0, true));
argument_tys.push(ptr_layout.scalar_pair_element_gcc_type(cx, 1, true));*/
unimplemented!();
//continue;
}
PassMode::Cast(cast) => cast.gcc_type(cx),
PassMode::Indirect { extra_attrs: None, .. } => cx.type_ptr_to(arg.memory_ty(cx)),
};
argument_tys.push(arg_ty);
}
(return_ty, argument_tys, self.c_variadic)
}
fn ptr_to_gcc_type(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
let (return_type, params, variadic) = self.gcc_type(cx);
let pointer_type = cx.context.new_function_pointer_type(None, return_type, &params, variadic);
pointer_type
}
/*fn llvm_cconv(&self) -> llvm::CallConv {
match self.conv {
Conv::C | Conv::Rust => llvm::CCallConv,
Conv::AmdGpuKernel => llvm::AmdGpuKernel,
Conv::ArmAapcs => llvm::ArmAapcsCallConv,
Conv::Msp430Intr => llvm::Msp430Intr,
Conv::PtxKernel => llvm::PtxKernel,
Conv::X86Fastcall => llvm::X86FastcallCallConv,
Conv::X86Intr => llvm::X86_Intr,
Conv::X86Stdcall => llvm::X86StdcallCallConv,
Conv::X86ThisCall => llvm::X86_ThisCall,
Conv::X86VectorCall => llvm::X86_VectorCall,
Conv::X86_64SysV => llvm::X86_64_SysV,
Conv::X86_64Win64 => llvm::X86_64_Win64,
}
}
fn apply_attrs_llfn(&self, cx: &CodegenCx<'ll, 'tcx>, llfn: &'ll Value) {
// FIXME(eddyb) can this also be applied to callsites?
if self.ret.layout.abi.is_uninhabited() {
llvm::Attribute::NoReturn.apply_llfn(llvm::AttributePlace::Function, llfn);
}
// FIXME(eddyb, wesleywiser): apply this to callsites as well?
if !self.can_unwind {
llvm::Attribute::NoUnwind.apply_llfn(llvm::AttributePlace::Function, llfn);
}
let mut i = 0;
let mut apply = |attrs: &ArgAttributes, ty: Option<&Type>| {
attrs.apply_llfn(llvm::AttributePlace::Argument(i), llfn, ty);
i += 1;
};
match self.ret.mode {
PassMode::Direct(ref attrs) => {
attrs.apply_llfn(llvm::AttributePlace::ReturnValue, llfn, None);
}
PassMode::Indirect(ref attrs, _) => apply(attrs, Some(self.ret.layout.gcc_type(cx))),
_ => {}
}
for arg in &self.args {
if arg.pad.is_some() {
apply(&ArgAttributes::new(), None);
}
match arg.mode {
PassMode::Ignore => {}
PassMode::Direct(ref attrs) | PassMode::Indirect(ref attrs, None) => {
apply(attrs, Some(arg.layout.gcc_type(cx)))
}
PassMode::Indirect(ref attrs, Some(ref extra_attrs)) => {
apply(attrs, None);
apply(extra_attrs, None);
}
PassMode::Pair(ref a, ref b) => {
apply(a, None);
apply(b, None);
}
PassMode::Cast(_) => apply(&ArgAttributes::new(), None),
}
}
}
fn apply_attrs_callsite(&self, bx: &mut Builder<'a, 'll, 'tcx>, callsite: &'ll Value) {
// FIXME(wesleywiser, eddyb): We should apply `nounwind` and `noreturn` as appropriate to this callsite.
let mut i = 0;
let mut apply = |attrs: &ArgAttributes, ty: Option<&Type>| {
attrs.apply_callsite(llvm::AttributePlace::Argument(i), callsite, ty);
i += 1;
};
match self.ret.mode {
PassMode::Direct(ref attrs) => {
attrs.apply_callsite(llvm::AttributePlace::ReturnValue, callsite, None);
}
PassMode::Indirect(ref attrs, _) => apply(attrs, Some(self.ret.layout.gcc_type(bx))),
_ => {}
}
if let abi::Abi::Scalar(ref scalar) = self.ret.layout.abi {
// If the value is a boolean, the range is 0..2 and that ultimately
// become 0..0 when the type becomes i1, which would be rejected
// by the LLVM verifier.
if let Int(..) = scalar.value {
if !scalar.is_bool() {
let range = scalar.valid_range_exclusive(bx);
if range.start != range.end {
bx.range_metadata(callsite, range);
}
}
}
}
for arg in &self.args {
if arg.pad.is_some() {
apply(&ArgAttributes::new(), None);
}
match arg.mode {
PassMode::Ignore => {}
PassMode::Direct(ref attrs) | PassMode::Indirect(ref attrs, None) => {
apply(attrs, Some(arg.layout.gcc_type(bx)))
}
PassMode::Indirect(ref attrs, Some(ref extra_attrs)) => {
apply(attrs, None);
apply(extra_attrs, None);
}
PassMode::Pair(ref a, ref b) => {
apply(a, None);
apply(b, None);
}
PassMode::Cast(_) => apply(&ArgAttributes::new(), None),
}
}
let cconv = self.llvm_cconv();
if cconv != llvm::CCallConv {
llvm::SetInstructionCallConv(callsite, cconv);
}
}*/
}

115
compiler/rustc_codegen_gcc/src/allocator.rs Normal file
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@ -0,0 +1,115 @@
//use crate::attributes;
use gccjit::{FunctionType, ToRValue};
use rustc_ast::expand::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
use rustc_middle::bug;
use rustc_middle::ty::TyCtxt;
use rustc_span::symbol::sym;
use crate::GccContext;
pub(crate) unsafe fn codegen(tcx: TyCtxt<'_>, mods: &mut GccContext, kind: AllocatorKind, has_alloc_error_handler: bool) {
let context = &mods.context;
let usize =
match tcx.sess.target.pointer_width {
16 => context.new_type::<u16>(),
32 => context.new_type::<u32>(),
64 => context.new_type::<u64>(),
tws => bug!("Unsupported target word size for int: {}", tws),
};
let i8 = context.new_type::<i8>();
let i8p = i8.make_pointer();
let void = context.new_type::<()>();
for method in ALLOCATOR_METHODS {
let mut types = Vec::with_capacity(method.inputs.len());
for ty in method.inputs.iter() {
match *ty {
AllocatorTy::Layout => {
types.push(usize);
types.push(usize);
}
AllocatorTy::Ptr => types.push(i8p),
AllocatorTy::Usize => types.push(usize),
AllocatorTy::ResultPtr | AllocatorTy::Unit => panic!("invalid allocator arg"),
}
}
let output = match method.output {
AllocatorTy::ResultPtr => Some(i8p),
AllocatorTy::Unit => None,
AllocatorTy::Layout | AllocatorTy::Usize | AllocatorTy::Ptr => {
panic!("invalid allocator output")
}
};
let name = format!("__rust_{}", method.name);
let args: Vec<_> = types.iter().enumerate()
.map(|(index, typ)| context.new_parameter(None, *typ, &format!("param{}", index)))
.collect();
let func = context.new_function(None, FunctionType::Exported, output.unwrap_or(void), &args, name, false);
if tcx.sess.target.options.default_hidden_visibility {
//llvm::LLVMRustSetVisibility(func, llvm::Visibility::Hidden);
}
if tcx.sess.must_emit_unwind_tables() {
// TODO
//attributes::emit_uwtable(func, true);
}
let callee = kind.fn_name(method.name);
let args: Vec<_> = types.iter().enumerate()
.map(|(index, typ)| context.new_parameter(None, *typ, &format!("param{}", index)))
.collect();
let callee = context.new_function(None, FunctionType::Extern, output.unwrap_or(void), &args, callee, false);
//llvm::LLVMRustSetVisibility(callee, llvm::Visibility::Hidden);
let block = func.new_block("entry");
let args = args
.iter()
.enumerate()
.map(|(i, _)| func.get_param(i as i32).to_rvalue())
.collect::<Vec<_>>();
let ret = context.new_call(None, callee, &args);
//llvm::LLVMSetTailCall(ret, True);
if output.is_some() {
block.end_with_return(None, ret);
}
else {
block.end_with_void_return(None);
}
}
let types = [usize, usize];
let name = "__rust_alloc_error_handler".to_string();
let args: Vec<_> = types.iter().enumerate()
.map(|(index, typ)| context.new_parameter(None, *typ, &format!("param{}", index)))
.collect();
let func = context.new_function(None, FunctionType::Exported, void, &args, name, false);
let kind =
if has_alloc_error_handler {
AllocatorKind::Global
}
else {
AllocatorKind::Default
};
let callee = kind.fn_name(sym::oom);
let args: Vec<_> = types.iter().enumerate()
.map(|(index, typ)| context.new_parameter(None, *typ, &format!("param{}", index)))
.collect();
let callee = context.new_function(None, FunctionType::Extern, void, &args, callee, false);
//llvm::LLVMRustSetVisibility(callee, llvm::Visibility::Hidden);
let block = func.new_block("entry");
let args = args
.iter()
.enumerate()
.map(|(i, _)| func.get_param(i as i32).to_rvalue())
.collect::<Vec<_>>();
let _ret = context.new_call(None, callee, &args);
//llvm::LLVMSetTailCall(ret, True);
block.end_with_void_return(None);
}

270
compiler/rustc_codegen_gcc/src/archive.rs Normal file
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use std::fs::File;
use std::path::{Path, PathBuf};
use rustc_session::Session;
use rustc_codegen_ssa::back::archive::{find_library, ArchiveBuilder};
use rustc_codegen_ssa::METADATA_FILENAME;
use rustc_data_structures::temp_dir::MaybeTempDir;
use rustc_middle::middle::cstore::DllImport;
use rustc_span::symbol::Symbol;
struct ArchiveConfig<'a> {
sess: &'a Session,
dst: PathBuf,
lib_search_paths: Vec<PathBuf>,
use_native_ar: bool,
use_gnu_style_archive: bool,
}
#[derive(Debug)]
enum ArchiveEntry {
FromArchive {
archive_index: usize,
entry_index: usize,
},
File(PathBuf),
}
pub struct ArArchiveBuilder<'a> {
config: ArchiveConfig<'a>,
src_archives: Vec<(PathBuf, ar::Archive<File>)>,
// Don't use `HashMap` here, as the order is important. `rust.metadata.bin` must always be at
// the end of an archive for linkers to not get confused.
entries: Vec<(String, ArchiveEntry)>,
}
impl<'a> ArchiveBuilder<'a> for ArArchiveBuilder<'a> {
fn new(sess: &'a Session, output: &Path, input: Option<&Path>) -> Self {
use rustc_codegen_ssa::back::link::archive_search_paths;
let config = ArchiveConfig {
sess,
dst: output.to_path_buf(),
lib_search_paths: archive_search_paths(sess),
use_native_ar: false,
// FIXME test for linux and System V derivatives instead
use_gnu_style_archive: sess.target.options.archive_format == "gnu",
};
let (src_archives, entries) = if let Some(input) = input {
let mut archive = ar::Archive::new(File::open(input).unwrap());
let mut entries = Vec::new();
let mut i = 0;
while let Some(entry) = archive.next_entry() {
let entry = entry.unwrap();
entries.push((
String::from_utf8(entry.header().identifier().to_vec()).unwrap(),
ArchiveEntry::FromArchive {
archive_index: 0,
entry_index: i,
},
));
i += 1;
}
(vec![(input.to_owned(), archive)], entries)
} else {
(vec![], Vec::new())
};
ArArchiveBuilder {
config,
src_archives,
entries,
}
}
fn src_files(&mut self) -> Vec<String> {
self.entries.iter().map(|(name, _)| name.clone()).collect()
}
fn remove_file(&mut self, name: &str) {
let index = self
.entries
.iter()
.position(|(entry_name, _)| entry_name == name)
.expect("Tried to remove file not existing in src archive");
self.entries.remove(index);
}
fn add_file(&mut self, file: &Path) {
self.entries.push((
file.file_name().unwrap().to_str().unwrap().to_string(),
ArchiveEntry::File(file.to_owned()),
));
}
fn add_native_library(&mut self, name: Symbol, verbatim: bool) {
let location = find_library(name, verbatim, &self.config.lib_search_paths, self.config.sess);
self.add_archive(location.clone(), |_| false)
.unwrap_or_else(|e| {
panic!(
"failed to add native library {}: {}",
location.to_string_lossy(),
e
);
});
}
fn add_rlib(
&mut self,
rlib: &Path,
name: &str,
lto: bool,
skip_objects: bool,
) -> std::io::Result<()> {
let obj_start = name.to_owned();
self.add_archive(rlib.to_owned(), move |fname: &str| {
// Ignore metadata files, no matter the name.
if fname == METADATA_FILENAME {
return true;
}
// Don't include Rust objects if LTO is enabled
if lto && fname.starts_with(&obj_start) && fname.ends_with(".o") {
return true;
}
// Otherwise if this is *not* a rust object and we're skipping
// objects then skip this file
if skip_objects && (!fname.starts_with(&obj_start) || !fname.ends_with(".o")) {
return true;
}
// ok, don't skip this
return false;
})
}
fn update_symbols(&mut self) {
}
fn build(mut self) {
use std::process::Command;
fn add_file_using_ar(archive: &Path, file: &Path) {
Command::new("ar")
.arg("r") // add or replace file
.arg("-c") // silence created file message
.arg(archive)
.arg(&file)
.status()
.unwrap();
}
enum BuilderKind<'a> {
Bsd(ar::Builder<File>),
Gnu(ar::GnuBuilder<File>),
NativeAr(&'a Path),
}
let mut builder = if self.config.use_native_ar {
BuilderKind::NativeAr(&self.config.dst)
} else if self.config.use_gnu_style_archive {
BuilderKind::Gnu(ar::GnuBuilder::new(
File::create(&self.config.dst).unwrap(),
self.entries
.iter()
.map(|(name, _)| name.as_bytes().to_vec())
.collect(),
))
} else {
BuilderKind::Bsd(ar::Builder::new(File::create(&self.config.dst).unwrap()))
};
// Add all files
for (entry_name, entry) in self.entries.into_iter() {
match entry {
ArchiveEntry::FromArchive {
archive_index,
entry_index,
} => {
let (ref src_archive_path, ref mut src_archive) =
self.src_archives[archive_index];
let entry = src_archive.jump_to_entry(entry_index).unwrap();
let header = entry.header().clone();
match builder {
BuilderKind::Bsd(ref mut builder) => {
builder.append(&header, entry).unwrap()
}
BuilderKind::Gnu(ref mut builder) => {
builder.append(&header, entry).unwrap()
}
BuilderKind::NativeAr(archive_file) => {
Command::new("ar")
.arg("x")
.arg(src_archive_path)
.arg(&entry_name)
.status()
.unwrap();
add_file_using_ar(archive_file, Path::new(&entry_name));
std::fs::remove_file(entry_name).unwrap();
}
}
}
ArchiveEntry::File(file) =>
match builder {
BuilderKind::Bsd(ref mut builder) => {
builder
.append_file(entry_name.as_bytes(), &mut File::open(file).expect("file for bsd builder"))
.unwrap()
},
BuilderKind::Gnu(ref mut builder) => {
builder
.append_file(entry_name.as_bytes(), &mut File::open(&file).expect(&format!("file {:?} for gnu builder", file)))
.unwrap()
},
BuilderKind::NativeAr(archive_file) => add_file_using_ar(archive_file, &file),
},
}
}
// Finalize archive
std::mem::drop(builder);
// Run ranlib to be able to link the archive
let status = std::process::Command::new("ranlib")
.arg(self.config.dst)
.status()
.expect("Couldn't run ranlib");
if !status.success() {
self.config.sess.fatal(&format!("Ranlib exited with code {:?}", status.code()));
}
}
fn inject_dll_import_lib(&mut self, _lib_name: &str, _dll_imports: &[DllImport], _tmpdir: &MaybeTempDir) {
unimplemented!();
}
}
impl<'a> ArArchiveBuilder<'a> {
fn add_archive<F>(&mut self, archive_path: PathBuf, mut skip: F) -> std::io::Result<()>
where
F: FnMut(&str) -> bool + 'static,
{
let mut archive = ar::Archive::new(std::fs::File::open(&archive_path)?);
let archive_index = self.src_archives.len();
let mut i = 0;
while let Some(entry) = archive.next_entry() {
let entry = entry.unwrap();
let file_name = String::from_utf8(entry.header().identifier().to_vec()).unwrap();
if !skip(&file_name) {
self.entries.push((
file_name,
ArchiveEntry::FromArchive {
archive_index,
entry_index: i,
},
));
}
i += 1;
}
self.src_archives.push((archive_path, archive));
Ok(())
}
}

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use gccjit::{RValue, ToRValue, Type};
use rustc_ast::ast::{InlineAsmOptions, InlineAsmTemplatePiece};
use rustc_codegen_ssa::mir::operand::OperandValue;
use rustc_codegen_ssa::mir::place::PlaceRef;
use rustc_codegen_ssa::traits::{AsmBuilderMethods, AsmMethods, BaseTypeMethods, BuilderMethods, GlobalAsmOperandRef, InlineAsmOperandRef};
use rustc_data_structures::fx::FxHashMap;
use rustc_hir::LlvmInlineAsmInner;
use rustc_middle::bug;
use rustc_span::Span;
use rustc_target::asm::*;
use crate::builder::Builder;
use crate::context::CodegenCx;
use crate::type_of::LayoutGccExt;
impl<'a, 'gcc, 'tcx> AsmBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
fn codegen_llvm_inline_asm(&mut self, _ia: &LlvmInlineAsmInner, _outputs: Vec<PlaceRef<'tcx, RValue<'gcc>>>, mut _inputs: Vec<RValue<'gcc>>, _span: Span) -> bool {
// TODO
return true;
/*let mut ext_constraints = vec![];
let mut output_types = vec![];
// Prepare the output operands
let mut indirect_outputs = vec![];
for (i, (out, &place)) in ia.outputs.iter().zip(&outputs).enumerate() {
if out.is_rw {
let operand = self.load_operand(place);
if let OperandValue::Immediate(_) = operand.val {
inputs.push(operand.immediate());
}
ext_constraints.push(i.to_string());
}
if out.is_indirect {
let operand = self.load_operand(place);
if let OperandValue::Immediate(_) = operand.val {
indirect_outputs.push(operand.immediate());
}
} else {
output_types.push(place.layout.gcc_type(self.cx()));
}
}
if !indirect_outputs.is_empty() {
indirect_outputs.extend_from_slice(&inputs);
inputs = indirect_outputs;
}
let clobbers = ia.clobbers.iter().map(|s| format!("~{{{}}}", &s));
// Default per-arch clobbers
// Basically what clang does
let arch_clobbers = match &self.sess().target.target.arch[..] {
"x86" | "x86_64" => vec!["~{dirflag}", "~{fpsr}", "~{flags}"],
"mips" | "mips64" => vec!["~{$1}"],
_ => Vec::new(),
};
let all_constraints = ia
.outputs
.iter()
.map(|out| out.constraint.to_string())
.chain(ia.inputs.iter().map(|s| s.to_string()))
.chain(ext_constraints)
.chain(clobbers)
.chain(arch_clobbers.iter().map(|s| (*s).to_string()))
.collect::<Vec<String>>()
.join(",");
debug!("Asm Constraints: {}", &all_constraints);
// Depending on how many outputs we have, the return type is different
let num_outputs = output_types.len();
let output_type = match num_outputs {
0 => self.type_void(),
1 => output_types[0],
_ => self.type_struct(&output_types, false),
};
let asm = ia.asm.as_str();
let r = inline_asm_call(
self,
&asm,
&all_constraints,
&inputs,
output_type,
ia.volatile,
ia.alignstack,
ia.dialect,
);
if r.is_none() {
return false;
}
let r = r.unwrap();
// Again, based on how many outputs we have
let outputs = ia.outputs.iter().zip(&outputs).filter(|&(ref o, _)| !o.is_indirect);
for (i, (_, &place)) in outputs.enumerate() {
let v = if num_outputs == 1 { r } else { self.extract_value(r, i as u64) };
OperandValue::Immediate(v).store(self, place);
}
// Store mark in a metadata node so we can map LLVM errors
// back to source locations. See #17552.
unsafe {
let key = "srcloc";
let kind = llvm::LLVMGetMDKindIDInContext(
self.llcx,
key.as_ptr() as *const c_char,
key.len() as c_uint,
);
let val: &'ll Value = self.const_i32(span.ctxt().outer_expn().as_u32() as i32);
llvm::LLVMSetMetadata(r, kind, llvm::LLVMMDNodeInContext(self.llcx, &val, 1));
}
true*/
}
fn codegen_inline_asm(&mut self, template: &[InlineAsmTemplatePiece], operands: &[InlineAsmOperandRef<'tcx, Self>], options: InlineAsmOptions, _span: &[Span]) {
let asm_arch = self.tcx.sess.asm_arch.unwrap();
let intel_dialect =
match asm_arch {
InlineAsmArch::X86 | InlineAsmArch::X86_64 if !options.contains(InlineAsmOptions::ATT_SYNTAX) => true,
_ => false,
};
// Collect the types of output operands
// FIXME: we do this here instead of later because of a bug in libgccjit where creating the
// variable after the extended asm expression causes a segfault:
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100380
let mut output_vars = FxHashMap::default();
let mut operand_numbers = FxHashMap::default();
let mut current_number = 0;
for (idx, op) in operands.iter().enumerate() {
match *op {
InlineAsmOperandRef::Out { place, .. } => {
let ty =
match place {
Some(place) => place.layout.gcc_type(self.cx, false),
None => {
// If the output is discarded, we don't really care what
// type is used. We're just using this to tell GCC to
// reserve the register.
//dummy_output_type(self.cx, reg.reg_class())
// NOTE: if no output value, we should not create one (it will be a
// clobber).
continue;
},
};
let var = self.current_func().new_local(None, ty, "output_register");
operand_numbers.insert(idx, current_number);
current_number += 1;
output_vars.insert(idx, var);
}
InlineAsmOperandRef::InOut { out_place, .. } => {
let ty =
match out_place {
Some(place) => place.layout.gcc_type(self.cx, false),
None => {
// If the output is discarded, we don't really care what
// type is used. We're just using this to tell GCC to
// reserve the register.
//dummy_output_type(self.cx, reg.reg_class())
// NOTE: if no output value, we should not create one.
continue;
},
};
operand_numbers.insert(idx, current_number);
current_number += 1;
let var = self.current_func().new_local(None, ty, "output_register");
output_vars.insert(idx, var);
}
_ => {}
}
}
// All output operands must come before the input operands, hence the 2 loops.
for (idx, op) in operands.iter().enumerate() {
match *op {
InlineAsmOperandRef::In { .. } | InlineAsmOperandRef::InOut { .. } => {
operand_numbers.insert(idx, current_number);
current_number += 1;
},
_ => (),
}
}
// Build the template string
let mut template_str = String::new();
for piece in template {
match *piece {
InlineAsmTemplatePiece::String(ref string) => {
if string.contains('%') {
for c in string.chars() {
if c == '%' {
template_str.push_str("%%");
}
else {
template_str.push(c);
}
}
}
else {
template_str.push_str(string)
}
}
InlineAsmTemplatePiece::Placeholder { operand_idx, modifier, span: _ } => {
match operands[operand_idx] {
InlineAsmOperandRef::Out { reg, place: Some(_), .. } => {
let modifier = modifier_to_gcc(asm_arch, reg.reg_class(), modifier);
if let Some(modifier) = modifier {
template_str.push_str(&format!("%{}{}", modifier, operand_numbers[&operand_idx]));
} else {
template_str.push_str(&format!("%{}", operand_numbers[&operand_idx]));
}
},
InlineAsmOperandRef::Out { place: None, .. } => {
unimplemented!("Out None");
},
InlineAsmOperandRef::In { reg, .. }
| InlineAsmOperandRef::InOut { reg, .. } => {
let modifier = modifier_to_gcc(asm_arch, reg.reg_class(), modifier);
if let Some(modifier) = modifier {
template_str.push_str(&format!("%{}{}", modifier, operand_numbers[&operand_idx]));
} else {
template_str.push_str(&format!("%{}", operand_numbers[&operand_idx]));
}
}
InlineAsmOperandRef::Const { ref string } => {
// Const operands get injected directly into the template
template_str.push_str(string);
}
InlineAsmOperandRef::SymFn { .. }
| InlineAsmOperandRef::SymStatic { .. } => {
unimplemented!();
// Only emit the raw symbol name
//template_str.push_str(&format!("${{{}:c}}", op_idx[&operand_idx]));
}
}
}
}
}
let block = self.llbb();
let template_str =
if intel_dialect {
template_str
}
else {
// FIXME: this might break the "m" memory constraint:
// https://stackoverflow.com/a/9347957/389119
// TODO: only set on x86 platforms.
format!(".att_syntax noprefix\n\t{}\n\t.intel_syntax noprefix", template_str)
};
let extended_asm = block.add_extended_asm(None, &template_str);
// Collect the types of output operands
let mut output_types = vec![];
for (idx, op) in operands.iter().enumerate() {
match *op {
InlineAsmOperandRef::Out { reg, late, place } => {
let ty =
match place {
Some(place) => place.layout.gcc_type(self.cx, false),
None => {
// If the output is discarded, we don't really care what
// type is used. We're just using this to tell GCC to
// reserve the register.
dummy_output_type(self.cx, reg.reg_class())
},
};
output_types.push(ty);
//op_idx.insert(idx, constraints.len());
let prefix = if late { "=" } else { "=&" };
let constraint = format!("{}{}", prefix, reg_to_gcc(reg));
if place.is_some() {
let var = output_vars[&idx];
extended_asm.add_output_operand(None, &constraint, var);
}
else {
// NOTE: reg.to_string() returns the register name with quotes around it so
// remove them.
extended_asm.add_clobber(reg.to_string().trim_matches('"'));
}
}
InlineAsmOperandRef::InOut { reg, late, in_value, out_place } => {
let ty =
match out_place {
Some(out_place) => out_place.layout.gcc_type(self.cx, false),
None => dummy_output_type(self.cx, reg.reg_class())
};
output_types.push(ty);
//op_idx.insert(idx, constraints.len());
// TODO: prefix of "+" for reading and writing?
let prefix = if late { "=" } else { "=&" };
let constraint = format!("{}{}", prefix, reg_to_gcc(reg));
if out_place.is_some() {
let var = output_vars[&idx];
// TODO: also specify an output operand when out_place is none: that would
// be the clobber but clobbers do not support general constraint like reg;
// they only support named registers.
// Not sure how we can do this. And the LLVM backend does not seem to add a
// clobber.
extended_asm.add_output_operand(None, &constraint, var);
}
let constraint = reg_to_gcc(reg);
extended_asm.add_input_operand(None, &constraint, in_value.immediate());
}
InlineAsmOperandRef::In { reg, value } => {
let constraint = reg_to_gcc(reg);
extended_asm.add_input_operand(None, &constraint, value.immediate());
}
_ => {}
}
}
/*if !options.contains(InlineAsmOptions::PRESERVES_FLAGS) {
match asm_arch {
InlineAsmArch::AArch64 | InlineAsmArch::Arm => {
constraints.push("~{cc}".to_string());
}
InlineAsmArch::X86 | InlineAsmArch::X86_64 => {
constraints.extend_from_slice(&[
"~{dirflag}".to_string(),
"~{fpsr}".to_string(),
"~{flags}".to_string(),
]);
}
InlineAsmArch::RiscV32 | InlineAsmArch::RiscV64 => {}
}
}
if !options.contains(InlineAsmOptions::NOMEM) {
// This is actually ignored by LLVM, but it's probably best to keep
// it just in case. LLVM instead uses the ReadOnly/ReadNone
// attributes on the call instruction to optimize.
constraints.push("~{memory}".to_string());
}
let volatile = !options.contains(InlineAsmOptions::PURE);
let alignstack = !options.contains(InlineAsmOptions::NOSTACK);
let output_type = match &output_types[..] {
[] => self.type_void(),
[ty] => ty,
tys => self.type_struct(&tys, false),
};*/
/*let result = inline_asm_call(
self,
&template_str,
&constraints.join(","),
&inputs,
output_type,
volatile,
alignstack,
dialect,
span,
)
.unwrap_or_else(|| span_bug!(span, "LLVM asm constraint validation failed"));
if options.contains(InlineAsmOptions::PURE) {
if options.contains(InlineAsmOptions::NOMEM) {
llvm::Attribute::ReadNone.apply_callsite(llvm::AttributePlace::Function, result);
} else if options.contains(InlineAsmOptions::READONLY) {
llvm::Attribute::ReadOnly.apply_callsite(llvm::AttributePlace::Function, result);
}
} else {
if options.contains(InlineAsmOptions::NOMEM) {
llvm::Attribute::InaccessibleMemOnly
.apply_callsite(llvm::AttributePlace::Function, result);
} else {
// LLVM doesn't have an attribute to represent ReadOnly + SideEffect
}
}*/
// Write results to outputs
for (idx, op) in operands.iter().enumerate() {
if let InlineAsmOperandRef::Out { place: Some(place), .. }
| InlineAsmOperandRef::InOut { out_place: Some(place), .. } = *op
{
OperandValue::Immediate(output_vars[&idx].to_rvalue()).store(self, place);
}
}
}
}
/// Converts a register class to a GCC constraint code.
// TODO: return &'static str instead?
fn reg_to_gcc(reg: InlineAsmRegOrRegClass) -> String {
match reg {
// For vector registers LLVM wants the register name to match the type size.
InlineAsmRegOrRegClass::Reg(reg) => {
// TODO: add support for vector register.
let constraint =
match reg.name() {
"ax" => "a",
"bx" => "b",
"cx" => "c",
"dx" => "d",
"si" => "S",
"di" => "D",
// TODO: for registers like r11, we have to create a register variable: https://stackoverflow.com/a/31774784/389119
// TODO: in this case though, it's a clobber, so it should work as r11.
// Recent nightly supports clobber() syntax, so update to it. It does not seem
// like it's implemented yet.
name => name, // FIXME: probably wrong.
};
constraint.to_string()
},
InlineAsmRegOrRegClass::RegClass(reg) => match reg {
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg) => unimplemented!(),
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg) => unimplemented!(),
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg) => unimplemented!(),
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg_thumb) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::sreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg_low16)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg_low8) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::sreg_low16)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg_low8)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg_low4) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg) => unimplemented!(),
InlineAsmRegClass::Bpf(_) => unimplemented!(),
InlineAsmRegClass::Hexagon(HexagonInlineAsmRegClass::reg) => unimplemented!(),
InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg) => unimplemented!(),
InlineAsmRegClass::Mips(MipsInlineAsmRegClass::freg) => unimplemented!(),
InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg16) => unimplemented!(),
InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg32) => unimplemented!(),
InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg64) => unimplemented!(),
InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::reg) => unimplemented!(),
InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::reg_nonzero) => unimplemented!(),
InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::freg) => unimplemented!(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg) => unimplemented!(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::freg) => unimplemented!(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::vreg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::mmx_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg) => "r",
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg_abcd) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg_byte) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::xmm_reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::ymm_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::x87_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::zmm_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::kreg) => unimplemented!(),
InlineAsmRegClass::Wasm(WasmInlineAsmRegClass::local) => unimplemented!(),
InlineAsmRegClass::SpirV(SpirVInlineAsmRegClass::reg) => {
bug!("GCC backend does not support SPIR-V")
}
InlineAsmRegClass::Err => unreachable!(),
}
.to_string(),
}
}
/// Type to use for outputs that are discarded. It doesn't really matter what
/// the type is, as long as it is valid for the constraint code.
fn dummy_output_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, reg: InlineAsmRegClass) -> Type<'gcc> {
match reg {
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg) => cx.type_i32(),
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg) => unimplemented!(),
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg)
| InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16) => {
unimplemented!()
}
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg_thumb) => cx.type_i32(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::sreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::sreg_low16) => cx.type_f32(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg_low16)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg_low8) => cx.type_f64(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg_low8)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg_low4) => {
unimplemented!()
}
InlineAsmRegClass::Bpf(_) => unimplemented!(),
InlineAsmRegClass::Hexagon(HexagonInlineAsmRegClass::reg) => cx.type_i32(),
InlineAsmRegClass::Mips(MipsInlineAsmRegClass::reg) => cx.type_i32(),
InlineAsmRegClass::Mips(MipsInlineAsmRegClass::freg) => cx.type_f32(),
InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg16) => cx.type_i16(),
InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg32) => cx.type_i32(),
InlineAsmRegClass::Nvptx(NvptxInlineAsmRegClass::reg64) => cx.type_i64(),
InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::reg) => cx.type_i32(),
InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::reg_nonzero) => cx.type_i32(),
InlineAsmRegClass::PowerPC(PowerPCInlineAsmRegClass::freg) => cx.type_f64(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg) => cx.type_i32(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::freg) => cx.type_f32(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::vreg) => cx.type_f32(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::reg_abcd) => cx.type_i32(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg_byte) => cx.type_i8(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::mmx_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::xmm_reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::ymm_reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::zmm_reg) => cx.type_f32(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::x87_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::kreg) => cx.type_i16(),
InlineAsmRegClass::Wasm(WasmInlineAsmRegClass::local) => cx.type_i32(),
InlineAsmRegClass::SpirV(SpirVInlineAsmRegClass::reg) => {
bug!("LLVM backend does not support SPIR-V")
},
InlineAsmRegClass::Err => unreachable!(),
}
}
impl<'gcc, 'tcx> AsmMethods for CodegenCx<'gcc, 'tcx> {
fn codegen_global_asm(&self, template: &[InlineAsmTemplatePiece], operands: &[GlobalAsmOperandRef], options: InlineAsmOptions, _line_spans: &[Span]) {
let asm_arch = self.tcx.sess.asm_arch.unwrap();
// Default to Intel syntax on x86
let intel_syntax = matches!(asm_arch, InlineAsmArch::X86 | InlineAsmArch::X86_64)
&& !options.contains(InlineAsmOptions::ATT_SYNTAX);
// Build the template string
let mut template_str = String::new();
for piece in template {
match *piece {
InlineAsmTemplatePiece::String(ref string) => {
for line in string.lines() {
// NOTE: gcc does not allow inline comment, so remove them.
let line =
if let Some(index) = line.rfind("//") {
&line[..index]
}
else {
line
};
template_str.push_str(line);
template_str.push('\n');
}
},
InlineAsmTemplatePiece::Placeholder { operand_idx, modifier: _, span: _ } => {
match operands[operand_idx] {
GlobalAsmOperandRef::Const { ref string } => {
// Const operands get injected directly into the
// template. Note that we don't need to escape $
// here unlike normal inline assembly.
template_str.push_str(string);
}
}
}
}
}
let template_str =
if intel_syntax {
format!("{}\n\t.intel_syntax noprefix", template_str)
}
else {
format!(".att_syntax\n\t{}\n\t.intel_syntax noprefix", template_str)
};
// NOTE: seems like gcc will put the asm in the wrong section, so set it to .text manually.
let template_str = format!(".pushsection .text\n{}\n.popsection", template_str);
self.context.add_top_level_asm(None, &template_str);
}
}
fn modifier_to_gcc(arch: InlineAsmArch, reg: InlineAsmRegClass, modifier: Option<char>) -> Option<char> {
match reg {
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::reg) => modifier,
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::preg) => modifier,
InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg)
| InlineAsmRegClass::AArch64(AArch64InlineAsmRegClass::vreg_low16) => {
unimplemented!()
//if modifier == Some('v') { None } else { modifier }
}
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::reg_thumb) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::sreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::sreg_low16) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg_low16)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::dreg_low8) => unimplemented!(),
InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg_low8)
| InlineAsmRegClass::Arm(ArmInlineAsmRegClass::qreg_low4) => {
unimplemented!()
/*if modifier.is_none() {
Some('q')
} else {
modifier
}*/
}
InlineAsmRegClass::Bpf(_) => unimplemented!(),
InlineAsmRegClass::Hexagon(_) => unimplemented!(),
InlineAsmRegClass::Mips(_) => unimplemented!(),
InlineAsmRegClass::Nvptx(_) => unimplemented!(),
InlineAsmRegClass::PowerPC(_) => unimplemented!(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::reg)
| InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::freg) => unimplemented!(),
InlineAsmRegClass::RiscV(RiscVInlineAsmRegClass::vreg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::reg_abcd) => match modifier {
None if arch == InlineAsmArch::X86_64 => Some('q'),
None => Some('k'),
Some('l') => Some('b'),
Some('h') => Some('h'),
Some('x') => Some('w'),
Some('e') => Some('k'),
Some('r') => Some('q'),
_ => unreachable!(),
},
InlineAsmRegClass::X86(X86InlineAsmRegClass::mmx_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::reg_byte) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::xmm_reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::ymm_reg)
| InlineAsmRegClass::X86(X86InlineAsmRegClass::zmm_reg) => unimplemented!() /*match (reg, modifier) {
(X86InlineAsmRegClass::xmm_reg, None) => Some('x'),
(X86InlineAsmRegClass::ymm_reg, None) => Some('t'),
(X86InlineAsmRegClass::zmm_reg, None) => Some('g'),
(_, Some('x')) => Some('x'),
(_, Some('y')) => Some('t'),
(_, Some('z')) => Some('g'),
_ => unreachable!(),
}*/,
InlineAsmRegClass::X86(X86InlineAsmRegClass::x87_reg) => unimplemented!(),
InlineAsmRegClass::X86(X86InlineAsmRegClass::kreg) => unimplemented!(),
InlineAsmRegClass::Wasm(WasmInlineAsmRegClass::local) => unimplemented!(),
InlineAsmRegClass::SpirV(SpirVInlineAsmRegClass::reg) => {
bug!("LLVM backend does not support SPIR-V")
},
InlineAsmRegClass::Err => unreachable!(),
}
}

1
compiler/rustc_codegen_gcc/src/back/mod.rs Normal file
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pub mod write;

234
compiler/rustc_codegen_gcc/src/back/write.rs Normal file
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use std::fs;
use gccjit::OutputKind;
use rustc_codegen_ssa::{CompiledModule, ModuleCodegen};
use rustc_codegen_ssa::back::write::{CodegenContext, EmitObj, ModuleConfig};
use rustc_errors::Handler;
use rustc_session::config::OutputType;
use rustc_span::fatal_error::FatalError;
use rustc_target::spec::SplitDebuginfo;
use crate::{GccCodegenBackend, GccContext};
pub(crate) unsafe fn codegen(cgcx: &CodegenContext<GccCodegenBackend>, _diag_handler: &Handler, module: ModuleCodegen<GccContext>, config: &ModuleConfig) -> Result<CompiledModule, FatalError> {
let _timer = cgcx.prof.generic_activity_with_arg("LLVM_module_codegen", &module.name[..]);
{
let context = &module.module_llvm.context;
//let llcx = &*module.module_llvm.llcx;
//let tm = &*module.module_llvm.tm;
let module_name = module.name.clone();
let module_name = Some(&module_name[..]);
//let handlers = DiagnosticHandlers::new(cgcx, diag_handler, llcx);
/*if cgcx.msvc_imps_needed {
create_msvc_imps(cgcx, llcx, llmod);
}*/
// A codegen-specific pass manager is used to generate object
// files for an GCC module.
//
// Apparently each of these pass managers is a one-shot kind of
// thing, so we create a new one for each type of output. The
// pass manager passed to the closure should be ensured to not
// escape the closure itself, and the manager should only be
// used once.
/*unsafe fn with_codegen<'ll, F, R>(tm: &'ll llvm::TargetMachine, llmod: &'ll llvm::Module, no_builtins: bool, f: F) -> R
where F: FnOnce(&'ll mut PassManager<'ll>) -> R,
{
let cpm = llvm::LLVMCreatePassManager();
llvm::LLVMAddAnalysisPasses(tm, cpm);
llvm::LLVMRustAddLibraryInfo(cpm, llmod, no_builtins);
f(cpm)
}*/
// Two things to note:
// - If object files are just LLVM bitcode we write bitcode, copy it to
// the .o file, and delete the bitcode if it wasn't otherwise
// requested.
// - If we don't have the integrated assembler then we need to emit
// asm from LLVM and use `gcc` to create the object file.
let _bc_out = cgcx.output_filenames.temp_path(OutputType::Bitcode, module_name);
let obj_out = cgcx.output_filenames.temp_path(OutputType::Object, module_name);
if config.bitcode_needed() {
// TODO
/*let _timer = cgcx
.prof
.generic_activity_with_arg("LLVM_module_codegen_make_bitcode", &module.name[..]);
let thin = ThinBuffer::new(llmod);
let data = thin.data();
if config.emit_bc || config.emit_obj == EmitObj::Bitcode {
let _timer = cgcx.prof.generic_activity_with_arg(
"LLVM_module_codegen_emit_bitcode",
&module.name[..],
);
if let Err(e) = fs::write(&bc_out, data) {
let msg = format!("failed to write bytecode to {}: {}", bc_out.display(), e);
diag_handler.err(&msg);
}
}
if config.emit_obj == EmitObj::ObjectCode(BitcodeSection::Full) {
let _timer = cgcx.prof.generic_activity_with_arg(
"LLVM_module_codegen_embed_bitcode",
&module.name[..],
);
embed_bitcode(cgcx, llcx, llmod, Some(data));
}
if config.emit_bc_compressed {
let _timer = cgcx.prof.generic_activity_with_arg(
"LLVM_module_codegen_emit_compressed_bitcode",
&module.name[..],
);
let dst = bc_out.with_extension(RLIB_BYTECODE_EXTENSION);
let data = bytecode::encode(&module.name, data);
if let Err(e) = fs::write(&dst, data) {
let msg = format!("failed to write bytecode to {}: {}", dst.display(), e);
diag_handler.err(&msg);
}
}*/
} /*else if config.emit_obj == EmitObj::ObjectCode(BitcodeSection::Marker) {
unimplemented!();
//embed_bitcode(cgcx, llcx, llmod, None);
}*/
if config.emit_ir {
unimplemented!();
/*let _timer = cgcx
.prof
.generic_activity_with_arg("LLVM_module_codegen_emit_ir", &module.name[..]);
let out = cgcx.output_filenames.temp_path(OutputType::LlvmAssembly, module_name);
let out_c = path_to_c_string(&out);
extern "C" fn demangle_callback(
input_ptr: *const c_char,
input_len: size_t,
output_ptr: *mut c_char,
output_len: size_t,
) -> size_t {
let input =
unsafe { slice::from_raw_parts(input_ptr as *const u8, input_len as usize) };
let input = match str::from_utf8(input) {
Ok(s) => s,
Err(_) => return 0,
};
let output = unsafe {
slice::from_raw_parts_mut(output_ptr as *mut u8, output_len as usize)
};
let mut cursor = io::Cursor::new(output);
let demangled = match rustc_demangle::try_demangle(input) {
Ok(d) => d,
Err(_) => return 0,
};
if write!(cursor, "{:#}", demangled).is_err() {
// Possible only if provided buffer is not big enough
return 0;
}
cursor.position() as size_t
}
let result = llvm::LLVMRustPrintModule(llmod, out_c.as_ptr(), demangle_callback);
result.into_result().map_err(|()| {
let msg = format!("failed to write LLVM IR to {}", out.display());
llvm_err(diag_handler, &msg)
})?;*/
}
if config.emit_asm {
let _timer = cgcx
.prof
.generic_activity_with_arg("LLVM_module_codegen_emit_asm", &module.name[..]);
let path = cgcx.output_filenames.temp_path(OutputType::Assembly, module_name);
context.compile_to_file(OutputKind::Assembler, path.to_str().expect("path to str"));
/*with_codegen(tm, llmod, config.no_builtins, |cpm| {
write_output_file(diag_handler, tm, cpm, llmod, &path, llvm::FileType::AssemblyFile)
})?;*/
}
match config.emit_obj {
EmitObj::ObjectCode(_) => {
let _timer = cgcx
.prof
.generic_activity_with_arg("LLVM_module_codegen_emit_obj", &module.name[..]);
//with_codegen(tm, llmod, config.no_builtins, |cpm| {
//println!("1: {}", module.name);
match &*module.name {
"std_example.7rcbfp3g-cgu.15" => {
println!("Dumping reproducer {}", module.name);
let _ = fs::create_dir("/tmp/reproducers");
// FIXME: segfault in dump_reproducer_to_file() might be caused by
// transmuting an rvalue to an lvalue.
// Segfault is actually in gcc::jit::reproducer::get_identifier_as_lvalue
context.dump_reproducer_to_file(&format!("/tmp/reproducers/{}.c", module.name));
println!("Dumped reproducer {}", module.name);
},
_ => (),
}
/*let _ = fs::create_dir("/tmp/dumps");
context.dump_to_file(&format!("/tmp/dumps/{}.c", module.name), true);
println!("Dumped {}", module.name);*/
//println!("Compile module {}", module.name);
context.compile_to_file(OutputKind::ObjectFile, obj_out.to_str().expect("path to str"));
//})?;
}
EmitObj::Bitcode => {
//unimplemented!();
/*debug!("copying bitcode {:?} to obj {:?}", bc_out, obj_out);
if let Err(e) = link_or_copy(&bc_out, &obj_out) {
diag_handler.err(&format!("failed to copy bitcode to object file: {}", e));
}
if !config.emit_bc {
debug!("removing_bitcode {:?}", bc_out);
if let Err(e) = fs::remove_file(&bc_out) {
diag_handler.err(&format!("failed to remove bitcode: {}", e));
}
}*/
}
EmitObj::None => {}
}
//drop(handlers);
}
Ok(module.into_compiled_module(
config.emit_obj != EmitObj::None,
cgcx.target_can_use_split_dwarf && cgcx.split_debuginfo == SplitDebuginfo::Unpacked,
config.emit_bc,
&cgcx.output_filenames,
))
}
pub(crate) fn link(_cgcx: &CodegenContext<GccCodegenBackend>, _diag_handler: &Handler, mut _modules: Vec<ModuleCodegen<GccContext>>) -> Result<ModuleCodegen<GccContext>, FatalError> {
unimplemented!();
/*use super::lto::{Linker, ModuleBuffer};
// Sort the modules by name to ensure to ensure deterministic behavior.
modules.sort_by(|a, b| a.name.cmp(&b.name));
let (first, elements) =
modules.split_first().expect("Bug! modules must contain at least one module.");
let mut linker = Linker::new(first.module_llvm.llmod());
for module in elements {
let _timer =
cgcx.prof.generic_activity_with_arg("LLVM_link_module", format!("{:?}", module.name));
let buffer = ModuleBuffer::new(module.module_llvm.llmod());
linker.add(&buffer.data()).map_err(|()| {
let msg = format!("failed to serialize module {:?}", module.name);
llvm_err(&diag_handler, &msg)
})?;
}
drop(linker);
Ok(modules.remove(0))*/
}

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compiler/rustc_codegen_gcc/src/base.rs Normal file
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use std::env;
use std::sync::Once;
use std::time::Instant;
use gccjit::{
Context,
FunctionType,
GlobalKind,
};
use rustc_hir::def_id::LOCAL_CRATE;
use rustc_middle::dep_graph;
use rustc_middle::middle::cstore::EncodedMetadata;
use rustc_middle::middle::exported_symbols;
use rustc_middle::ty::TyCtxt;
use rustc_middle::mir::mono::Linkage;
use rustc_codegen_ssa::{ModuleCodegen, ModuleKind};
use rustc_codegen_ssa::base::maybe_create_entry_wrapper;
use rustc_codegen_ssa::mono_item::MonoItemExt;
use rustc_codegen_ssa::traits::DebugInfoMethods;
use rustc_session::config::DebugInfo;
use rustc_span::Symbol;
use crate::{GccContext, create_function_calling_initializers};
use crate::builder::Builder;
use crate::context::CodegenCx;
pub fn global_linkage_to_gcc(linkage: Linkage) -> GlobalKind {
match linkage {
Linkage::External => GlobalKind::Imported,
Linkage::AvailableExternally => GlobalKind::Imported,
Linkage::LinkOnceAny => unimplemented!(),
Linkage::LinkOnceODR => unimplemented!(),
Linkage::WeakAny => unimplemented!(),
Linkage::WeakODR => unimplemented!(),
Linkage::Appending => unimplemented!(),
Linkage::Internal => GlobalKind::Internal,
Linkage::Private => GlobalKind::Internal,
Linkage::ExternalWeak => GlobalKind::Imported, // TODO: should be weak linkage.
Linkage::Common => unimplemented!(),
}
}
pub fn linkage_to_gcc(linkage: Linkage) -> FunctionType {
match linkage {
Linkage::External => FunctionType::Exported,
Linkage::AvailableExternally => FunctionType::Extern,
Linkage::LinkOnceAny => unimplemented!(),
Linkage::LinkOnceODR => unimplemented!(),
Linkage::WeakAny => FunctionType::Exported, // FIXME: should be similar to linkonce.
Linkage::WeakODR => unimplemented!(),
Linkage::Appending => unimplemented!(),
Linkage::Internal => FunctionType::Internal,
Linkage::Private => FunctionType::Internal,
Linkage::ExternalWeak => unimplemented!(),
Linkage::Common => unimplemented!(),
}
}
pub fn compile_codegen_unit<'tcx>(tcx: TyCtxt<'tcx>, cgu_name: Symbol) -> (ModuleCodegen<GccContext>, u64) {
let prof_timer = tcx.prof.generic_activity("codegen_module");
let start_time = Instant::now();
let dep_node = tcx.codegen_unit(cgu_name).codegen_dep_node(tcx);
let (module, _) = tcx.dep_graph.with_task(dep_node, tcx, cgu_name, module_codegen, dep_graph::hash_result);
let time_to_codegen = start_time.elapsed();
drop(prof_timer);
// We assume that the cost to run GCC on a CGU is proportional to
// the time we needed for codegenning it.
let cost = time_to_codegen.as_secs() * 1_000_000_000 + time_to_codegen.subsec_nanos() as u64;
fn module_codegen(tcx: TyCtxt<'_>, cgu_name: Symbol) -> ModuleCodegen<GccContext> {
let cgu = tcx.codegen_unit(cgu_name);
// Instantiate monomorphizations without filling out definitions yet...
//let llvm_module = ModuleLlvm::new(tcx, &cgu_name.as_str());
let context = Context::default();
// TODO: only set on x86 platforms.
context.add_command_line_option("-masm=intel");
for arg in &tcx.sess.opts.cg.llvm_args {
context.add_command_line_option(arg);
}
context.add_command_line_option("-fno-semantic-interposition");
//context.set_dump_code_on_compile(true);
if env::var("CG_GCCJIT_DUMP_GIMPLE").as_deref() == Ok("1") {
context.set_dump_initial_gimple(true);
}
context.set_debug_info(true);
//context.set_dump_everything(true);
//context.set_keep_intermediates(true);
{
let cx = CodegenCx::new(&context, cgu, tcx);
static START: Once = Once::new();
START.call_once(|| {
let initializer_name = format!("__gccGlobalCrateInit{}", tcx.crate_name(LOCAL_CRATE));
let func = context.new_function(None, FunctionType::Exported, context.new_type::<()>(), &[], initializer_name, false);
let block = func.new_block("initial");
create_function_calling_initializers(tcx, &context, block);
block.end_with_void_return(None);
});
//println!("module_codegen: {:?} {:?}", cgu_name, &cx.context as *const _);
let mono_items = cgu.items_in_deterministic_order(tcx);
for &(mono_item, (linkage, visibility)) in &mono_items {
mono_item.predefine::<Builder<'_, '_, '_>>(&cx, linkage, visibility);
}
// ... and now that we have everything pre-defined, fill out those definitions.
for &(mono_item, _) in &mono_items {
mono_item.define::<Builder<'_, '_, '_>>(&cx);
}
// If this codegen unit contains the main function, also create the
// wrapper here
maybe_create_entry_wrapper::<Builder<'_, '_, '_>>(&cx);
// Finalize debuginfo
if cx.sess().opts.debuginfo != DebugInfo::None {
cx.debuginfo_finalize();
}
cx.global_init_block.end_with_void_return(None);
}
ModuleCodegen {
name: cgu_name.to_string(),
module_llvm: GccContext {
context
},
kind: ModuleKind::Regular,
}
}
(module, cost)
}
pub fn write_compressed_metadata<'tcx>(tcx: TyCtxt<'tcx>, metadata: &EncodedMetadata, gcc_module: &mut GccContext) {
use snap::write::FrameEncoder;
use std::io::Write;
// Historical note:
//
// When using link.exe it was seen that the section name `.note.rustc`
// was getting shortened to `.note.ru`, and according to the PE and COFF
// specification:
//
// > Executable images do not use a string table and do not support
// > section names longer than 8 characters
//
// https://docs.microsoft.com/en-us/windows/win32/debug/pe-format
//
// As a result, we choose a slightly shorter name! As to why
// `.note.rustc` works on MinGW, see
// https://github.com/llvm/llvm-project/blob/llvmorg-12.0.0/lld/COFF/Writer.cpp#L1190-L1197
let section_name = if tcx.sess.target.is_like_osx { "__DATA,.rustc" } else { ".rustc" };
let context = &gcc_module.context;
let mut compressed = rustc_metadata::METADATA_HEADER.to_vec();
FrameEncoder::new(&mut compressed).write_all(&metadata.raw_data).unwrap();
let name = exported_symbols::metadata_symbol_name(tcx);
let typ = context.new_array_type(None, context.new_type::<u8>(), compressed.len() as i32);
let global = context.new_global(None, GlobalKind::Exported, typ, name);
global.global_set_initializer(&compressed);
global.set_link_section(section_name);
// Also generate a .section directive to force no
// flags, at least for ELF outputs, so that the
// metadata doesn't get loaded into memory.
let directive = format!(".section {}", section_name);
context.add_top_level_asm(None, &directive);
}

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use gccjit::{FunctionType, RValue};
use rustc_codegen_ssa::traits::BaseTypeMethods;
use rustc_middle::ty::{Instance, TypeFoldable};
use rustc_middle::ty::layout::{FnAbiExt, HasTyCtxt};
use rustc_target::abi::call::FnAbi;
use crate::abi::FnAbiGccExt;
use crate::context::CodegenCx;
/// Codegens a reference to a fn/method item, monomorphizing and
/// inlining as it goes.
///
/// # Parameters
///
/// - `cx`: the crate context
/// - `instance`: the instance to be instantiated
pub fn get_fn<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, instance: Instance<'tcx>) -> RValue<'gcc> {
let tcx = cx.tcx();
//debug!("get_fn(instance={:?})", instance);
assert!(!instance.substs.needs_infer());
assert!(!instance.substs.has_escaping_bound_vars());
assert!(!instance.substs.has_param_types_or_consts());
if let Some(&func) = cx.instances.borrow().get(&instance) {
return func;
}
let sym = tcx.symbol_name(instance).name;
//debug!("get_fn({:?}: {:?}) => {}", instance, instance.monomorphic_ty(cx.tcx()), sym);
let fn_abi = FnAbi::of_instance(cx, instance, &[]);
// TODO
let func =
if let Some(func) = cx.get_declared_value(&sym) {
// Create a fn pointer with the new signature.
let ptrty = fn_abi.ptr_to_gcc_type(cx);
// This is subtle and surprising, but sometimes we have to bitcast
// the resulting fn pointer. The reason has to do with external
// functions. If you have two crates that both bind the same C
// library, they may not use precisely the same types: for
// example, they will probably each declare their own structs,
// which are distinct types from LLVM's point of view (nominal
// types).
//
// Now, if those two crates are linked into an application, and
// they contain inlined code, you can wind up with a situation
// where both of those functions wind up being loaded into this
// application simultaneously. In that case, the same function
// (from LLVM's point of view) requires two types. But of course
// LLVM won't allow one function to have two types.
//
// What we currently do, therefore, is declare the function with
// one of the two types (whichever happens to come first) and then
// bitcast as needed when the function is referenced to make sure
// it has the type we expect.
//
// This can occur on either a crate-local or crate-external
// reference. It also occurs when testing libcore and in some
// other weird situations. Annoying.
if cx.val_ty(func) != ptrty {
//debug!("get_fn: casting {:?} to {:?}", func, ptrty);
// TODO
//cx.const_ptrcast(func, ptrty)
func
}
else {
//debug!("get_fn: not casting pointer!");
func
}
}
else {
cx.linkage.set(FunctionType::Extern);
let func = cx.declare_fn(&sym, &fn_abi);
//cx.linkage.set(FunctionType::Internal);
//debug!("get_fn: not casting pointer!");
// TODO
//attributes::from_fn_attrs(cx, func, instance);
//let instance_def_id = instance.def_id();
// TODO
/*if cx.use_dll_storage_attrs && tcx.is_dllimport_foreign_item(instance_def_id) {
unsafe {
llvm::LLVMSetDLLStorageClass(func, llvm::DLLStorageClass::DllImport);
}
}*/
func
};
cx.instances.borrow_mut().insert(instance, func);
func
}

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use std::convert::TryFrom;
use std::convert::TryInto;
use gccjit::{Block, CType, RValue, Type, ToRValue};
use rustc_codegen_ssa::mir::place::PlaceRef;
use rustc_codegen_ssa::traits::{
BaseTypeMethods,
ConstMethods,
DerivedTypeMethods,
MiscMethods,
StaticMethods,
};
use rustc_middle::bug;
use rustc_middle::mir::Mutability;
use rustc_middle::ty::{layout::TyAndLayout, ScalarInt};
use rustc_mir::interpret::{Allocation, GlobalAlloc, Scalar};
use rustc_span::Symbol;
use rustc_target::abi::{self, HasDataLayout, LayoutOf, Pointer, Size};
use crate::consts::const_alloc_to_gcc;
use crate::context::CodegenCx;
use crate::type_of::LayoutGccExt;
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn const_bytes(&self, bytes: &[u8]) -> RValue<'gcc> {
bytes_in_context(self, bytes)
}
fn const_cstr(&self, symbol: Symbol, _null_terminated: bool) -> RValue<'gcc> {
// TODO: handle null_terminated.
if let Some(&value) = self.const_cstr_cache.borrow().get(&symbol) {
return value.to_rvalue();
}
let global = self.global_string(&*symbol.as_str());
self.const_cstr_cache.borrow_mut().insert(symbol, global.dereference(None));
global
}
fn global_string(&self, string: &str) -> RValue<'gcc> {
// TODO: handle non-null-terminated strings.
let string = self.context.new_string_literal(&*string);
let sym = self.generate_local_symbol_name("str");
// NOTE: TLS is always off for a string litteral.
// NOTE: string litterals do not have a link section.
let global = self.define_global(&sym, self.val_ty(string), false, None)
.unwrap_or_else(|| bug!("symbol `{}` is already defined", sym));
self.global_init_block.add_assignment(None, global.dereference(None), string);
global.to_rvalue()
//llvm::LLVMRustSetLinkage(global, llvm::Linkage::InternalLinkage);
}
pub fn inttoptr(&self, block: Block<'gcc>, value: RValue<'gcc>, dest_ty: Type<'gcc>) -> RValue<'gcc> {
let func = block.get_function();
let local = func.new_local(None, value.get_type(), "intLocal");
block.add_assignment(None, local, value);
let value_address = local.get_address(None);
let ptr = self.context.new_cast(None, value_address, dest_ty.make_pointer());
ptr.dereference(None).to_rvalue()
}
pub fn ptrtoint(&self, block: Block<'gcc>, value: RValue<'gcc>, dest_ty: Type<'gcc>) -> RValue<'gcc> {
// TODO: when libgccjit allow casting from pointer to int, remove this.
let func = block.get_function();
let local = func.new_local(None, value.get_type(), "ptrLocal");
block.add_assignment(None, local, value);
let ptr_address = local.get_address(None);
let ptr = self.context.new_cast(None, ptr_address, dest_ty.make_pointer());
ptr.dereference(None).to_rvalue()
}
/*pub fn const_vector(&self, elements: &[RValue<'gcc>]) -> RValue<'gcc> {
self.context.new_rvalue_from_vector(None, elements[0].get_type(), elements)
}*/
}
pub fn bytes_in_context<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, bytes: &[u8]) -> RValue<'gcc> {
let context = &cx.context;
let typ = context.new_array_type(None, context.new_type::<u8>(), bytes.len() as i32);
let global = cx.declare_unnamed_global(typ);
global.global_set_initializer(bytes);
global.to_rvalue()
}
pub fn type_is_pointer<'gcc>(typ: Type<'gcc>) -> bool {
typ.get_pointee().is_some()
}
impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn const_null(&self, typ: Type<'gcc>) -> RValue<'gcc> {
if type_is_pointer(typ) {
self.context.new_null(typ)
}
else {
self.const_int(typ, 0)
}
}
fn const_undef(&self, typ: Type<'gcc>) -> RValue<'gcc> {
let local = self.current_func.borrow().expect("func")
.new_local(None, typ, "undefined");
if typ.is_struct().is_some() {
// NOTE: hack to workaround a limitation of the rustc API: see comment on
// CodegenCx.structs_as_pointer
let pointer = local.get_address(None);
self.structs_as_pointer.borrow_mut().insert(pointer);
pointer
}
else {
local.to_rvalue()
}
}
fn const_int(&self, typ: Type<'gcc>, int: i64) -> RValue<'gcc> {
self.context.new_rvalue_from_long(typ, i64::try_from(int).expect("i64::try_from"))
}
fn const_uint(&self, typ: Type<'gcc>, int: u64) -> RValue<'gcc> {
self.context.new_rvalue_from_long(typ, u64::try_from(int).expect("u64::try_from") as i64)
}
fn const_uint_big(&self, typ: Type<'gcc>, num: u128) -> RValue<'gcc> {
let num64: Result<i64, _> = num.try_into();
if let Ok(num) = num64 {
// FIXME: workaround for a bug where libgccjit is expecting a constant.
// The operations >> 64 and | low are making the normal case a non-constant.
return self.context.new_rvalue_from_long(typ, num as i64);
}
if num >> 64 != 0 {
// FIXME: use a new function new_rvalue_from_unsigned_long()?
let low = self.context.new_rvalue_from_long(self.u64_type, num as u64 as i64);
let high = self.context.new_rvalue_from_long(typ, (num >> 64) as u64 as i64);
let sixty_four = self.context.new_rvalue_from_long(typ, 64);
(high << sixty_four) | self.context.new_cast(None, low, typ)
}
else if typ.is_i128(self) {
let num = self.context.new_rvalue_from_long(self.u64_type, num as u64 as i64);
self.context.new_cast(None, num, typ)
}
else {
self.context.new_rvalue_from_long(typ, num as u64 as i64)
}
}
fn const_bool(&self, val: bool) -> RValue<'gcc> {
self.const_uint(self.type_i1(), val as u64)
}
fn const_i32(&self, i: i32) -> RValue<'gcc> {
self.const_int(self.type_i32(), i as i64)
}
fn const_u32(&self, i: u32) -> RValue<'gcc> {
self.const_uint(self.type_u32(), i as u64)
}
fn const_u64(&self, i: u64) -> RValue<'gcc> {
self.const_uint(self.type_u64(), i)
}
fn const_usize(&self, i: u64) -> RValue<'gcc> {
let bit_size = self.data_layout().pointer_size.bits();
if bit_size < 64 {
// make sure it doesn't overflow
assert!(i < (1 << bit_size));
}
self.const_uint(self.usize_type, i)
}
fn const_u8(&self, _i: u8) -> RValue<'gcc> {
unimplemented!();
//self.const_uint(self.type_i8(), i as u64)
}
fn const_real(&self, _t: Type<'gcc>, _val: f64) -> RValue<'gcc> {
unimplemented!();
//unsafe { llvm::LLVMConstReal(t, val) }
}
fn const_str(&self, s: Symbol) -> (RValue<'gcc>, RValue<'gcc>) {
let len = s.as_str().len();
let cs = self.const_ptrcast(self.const_cstr(s, false),
self.type_ptr_to(self.layout_of(self.tcx.types.str_).gcc_type(self, true)),
);
(cs, self.const_usize(len as u64))
}
fn const_struct(&self, values: &[RValue<'gcc>], packed: bool) -> RValue<'gcc> {
let fields: Vec<_> = values.iter()
.map(|value| value.get_type())
.collect();
// TODO: cache the type? It's anonymous, so probably not.
let name = fields.iter().map(|typ| format!("{:?}", typ)).collect::<Vec<_>>().join("_");
let typ = self.type_struct(&fields, packed);
let structure = self.global_init_func.new_local(None, typ, &name);
let struct_type = typ.is_struct().expect("struct type");
for (index, value) in values.iter().enumerate() {
let field = struct_type.get_field(index as i32);
let field_lvalue = structure.access_field(None, field);
self.global_init_block.add_assignment(None, field_lvalue, *value);
}
self.lvalue_to_rvalue(structure)
}
fn const_to_opt_uint(&self, _v: RValue<'gcc>) -> Option<u64> {
// TODO
None
//try_as_const_integral(v).map(|v| unsafe { llvm::LLVMConstIntGetZExtValue(v) })
}
fn const_to_opt_u128(&self, _v: RValue<'gcc>, _sign_ext: bool) -> Option<u128> {
// TODO
None
/*try_as_const_integral(v).and_then(|v| unsafe {
let (mut lo, mut hi) = (0u64, 0u64);
let success = llvm::LLVMRustConstInt128Get(v, sign_ext, &mut hi, &mut lo);
success.then_some(hi_lo_to_u128(lo, hi))
})*/
}
fn scalar_to_backend(&self, cv: Scalar, layout: &abi::Scalar, ty: Type<'gcc>) -> RValue<'gcc> {
let bitsize = if layout.is_bool() { 1 } else { layout.value.size(self).bits() };
match cv {
Scalar::Int(ScalarInt::ZST) => {
assert_eq!(0, layout.value.size(self).bytes());
self.const_undef(self.type_ix(0))
}
Scalar::Int(int) => {
let data = int.assert_bits(layout.value.size(self));
// FIXME: there's some issues with using the u128 code that follows, so hard-code
// the paths for floating-point values.
if ty == self.float_type {
return self.context.new_rvalue_from_double(ty, f32::from_bits(data as u32) as f64);
}
else if ty == self.double_type {
return self.context.new_rvalue_from_double(ty, f64::from_bits(data as u64));
}
let value = self.const_uint_big(self.type_ix(bitsize), data);
if layout.value == Pointer {
self.inttoptr(self.current_block.borrow().expect("block"), value, ty)
} else {
self.const_bitcast(value, ty)
}
}
Scalar::Ptr(ptr, _size) => {
let (alloc_id, offset) = ptr.into_parts();
let base_addr =
match self.tcx.global_alloc(alloc_id) {
GlobalAlloc::Memory(alloc) => {
let init = const_alloc_to_gcc(self, alloc);
let value =
match alloc.mutability {
Mutability::Mut => self.static_addr_of_mut(init, alloc.align, None),
_ => self.static_addr_of(init, alloc.align, None),
};
if !self.sess().fewer_names() {
// TODO
//llvm::set_value_name(value, format!("{:?}", ptr.alloc_id).as_bytes());
}
value
},
GlobalAlloc::Function(fn_instance) => {
self.get_fn_addr(fn_instance)
},
GlobalAlloc::Static(def_id) => {
assert!(self.tcx.is_static(def_id));
self.get_static(def_id)
},
};
let ptr_type = base_addr.get_type();
let base_addr = self.const_bitcast(base_addr, self.usize_type);
let offset = self.context.new_rvalue_from_long(self.usize_type, offset.bytes() as i64);
let ptr = self.const_bitcast(base_addr + offset, ptr_type);
let value = ptr.dereference(None);
if layout.value != Pointer {
self.const_bitcast(value.to_rvalue(), ty)
}
else {
self.const_bitcast(value.get_address(None), ty)
}
}
}
}
fn const_data_from_alloc(&self, alloc: &Allocation) -> Self::Value {
const_alloc_to_gcc(self, alloc)
}
fn from_const_alloc(&self, layout: TyAndLayout<'tcx>, alloc: &Allocation, offset: Size) -> PlaceRef<'tcx, RValue<'gcc>> {
assert_eq!(alloc.align, layout.align.abi);
let ty = self.type_ptr_to(layout.gcc_type(self, true));
let value =
if layout.size == Size::ZERO {
let value = self.const_usize(alloc.align.bytes());
self.context.new_cast(None, value, ty)
}
else {
let init = const_alloc_to_gcc(self, alloc);
let base_addr = self.static_addr_of(init, alloc.align, None);
let array = self.const_bitcast(base_addr, self.type_i8p());
let value = self.context.new_array_access(None, array, self.const_usize(offset.bytes())).get_address(None);
self.const_bitcast(value, ty)
};
PlaceRef::new_sized(value, layout)
}
fn const_ptrcast(&self, val: RValue<'gcc>, ty: Type<'gcc>) -> RValue<'gcc> {
self.context.new_cast(None, val, ty)
}
}
pub trait SignType<'gcc, 'tcx> {
fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
}
impl<'gcc, 'tcx> SignType<'gcc, 'tcx> for Type<'gcc> {
fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.is_i8(cx) || self.is_i16(cx) || self.is_i32(cx) || self.is_i64(cx) || self.is_i128(cx)
}
fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.is_u8(cx) || self.is_u16(cx) || self.is_u32(cx) || self.is_u64(cx) || self.is_u128(cx)
}
fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
if self.is_u8(cx) {
cx.i8_type
}
else if self.is_u16(cx) {
cx.i16_type
}
else if self.is_u32(cx) {
cx.i32_type
}
else if self.is_u64(cx) {
cx.i64_type
}
else if self.is_u128(cx) {
cx.i128_type
}
else {
self.clone()
}
}
}
pub trait TypeReflection<'gcc, 'tcx> {
fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
}
impl<'gcc, 'tcx> TypeReflection<'gcc, 'tcx> for Type<'gcc> {
fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.u8_type
}
fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.u16_type
}
fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.uint_type
}
fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.ulong_type
}
fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.ulonglong_type
}
fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.i8_type
}
fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.u8_type
}
fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.i16_type
}
fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.u16_type
}
fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.i32_type
}
fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.u32_type
}
fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.i64_type
}
fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.u64_type
}
fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.context.new_c_type(CType::Int128t)
}
fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.context.new_c_type(CType::UInt128t)
}
fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.context.new_type::<f32>()
}
fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
self.unqualified() == cx.context.new_type::<f64>()
}
}

527
compiler/rustc_codegen_gcc/src/consts.rs Normal file
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@ -0,0 +1,527 @@
use gccjit::{RValue, Type};
use rustc_codegen_ssa::traits::{BaseTypeMethods, ConstMethods, DerivedTypeMethods, StaticMethods};
use rustc_hir as hir;
use rustc_hir::Node;
use rustc_middle::{bug, span_bug};
use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrFlags, CodegenFnAttrs};
use rustc_middle::mir::mono::MonoItem;
use rustc_middle::ty::{self, Instance, Ty};
use rustc_mir::interpret::{self, Allocation, ErrorHandled, Scalar as InterpScalar, read_target_uint};
use rustc_span::Span;
use rustc_span::def_id::DefId;
use rustc_target::abi::{self, Align, HasDataLayout, LayoutOf, Primitive, Size};
use crate::base;
use crate::context::CodegenCx;
use crate::mangled_std_symbols::{ARGC, ARGV, ARGV_INIT_ARRAY};
use crate::type_of::LayoutGccExt;
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn const_bitcast(&self, value: RValue<'gcc>, typ: Type<'gcc>) -> RValue<'gcc> {
if value.get_type() == self.bool_type.make_pointer() {
if let Some(pointee) = typ.get_pointee() {
if pointee.is_vector().is_some() {
panic!()
}
}
}
self.context.new_bitcast(None, value, typ)
}
}
impl<'gcc, 'tcx> StaticMethods for CodegenCx<'gcc, 'tcx> {
fn static_addr_of(&self, cv: RValue<'gcc>, align: Align, kind: Option<&str>) -> RValue<'gcc> {
if let Some(global_value) = self.const_globals.borrow().get(&cv) {
// TODO
/*unsafe {
// Upgrade the alignment in cases where the same constant is used with different
// alignment requirements
let llalign = align.bytes() as u32;
if llalign > llvm::LLVMGetAlignment(gv) {
llvm::LLVMSetAlignment(gv, llalign);
}
}*/
return *global_value;
}
let global_value = self.static_addr_of_mut(cv, align, kind);
// TODO
/*unsafe {
llvm::LLVMSetGlobalConstant(global_value, True);
}*/
self.const_globals.borrow_mut().insert(cv, global_value);
global_value
}
fn codegen_static(&self, def_id: DefId, is_mutable: bool) {
let attrs = self.tcx.codegen_fn_attrs(def_id);
let instance = Instance::mono(self.tcx, def_id);
let name = &*self.tcx.symbol_name(instance).name;
let (value, alloc) =
match codegen_static_initializer(&self, def_id) {
Ok(value) => value,
// Error has already been reported
Err(_) => return,
};
let is_tls = attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
let global = self.get_static(def_id);
// boolean SSA values are i1, but they have to be stored in i8 slots,
// otherwise some LLVM optimization passes don't work as expected
let val_llty = self.val_ty(value);
let value =
if val_llty == self.type_i1() {
//val_llty = self.type_i8();
unimplemented!();
//llvm::LLVMConstZExt(value, val_llty)
}
else {
value
};
let instance = Instance::mono(self.tcx, def_id);
let ty = instance.ty(self.tcx, ty::ParamEnv::reveal_all());
let gcc_type = self.layout_of(ty).gcc_type(self, true);
let global =
if val_llty == gcc_type {
global
}
else {
// If we created the global with the wrong type,
// correct the type.
/*let name = llvm::get_value_name(global).to_vec();
llvm::set_value_name(global, b"");
let linkage = llvm::LLVMRustGetLinkage(global);
let visibility = llvm::LLVMRustGetVisibility(global);*/
let new_global = self.get_or_insert_global(&name, val_llty, is_tls, attrs.link_section);
/*llvm::LLVMRustSetLinkage(new_global, linkage);
llvm::LLVMRustSetVisibility(new_global, visibility);*/
// To avoid breaking any invariants, we leave around the old
// global for the moment; we'll replace all references to it
// with the new global later. (See base::codegen_backend.)
//self.statics_to_rauw.borrow_mut().push((global, new_global));
new_global
};
// TODO
//set_global_alignment(&self, global, self.align_of(ty));
//llvm::LLVMSetInitializer(global, value);
let value = self.rvalue_as_lvalue(value);
let value = value.get_address(None);
let dest_typ = global.get_type();
let value = self.context.new_cast(None, value, dest_typ);
// NOTE: do not init the variables related to argc/argv because it seems we cannot
// overwrite those variables.
// FIXME: correctly support global variable initialization.
let skip_init = [
ARGV_INIT_ARRAY,
ARGC,
ARGV,
];
if !skip_init.iter().any(|symbol_name| name.starts_with(symbol_name)) {
// TODO: switch to set_initializer when libgccjit supports that.
let memcpy = self.context.get_builtin_function("memcpy");
let dst = self.context.new_cast(None, global, self.type_i8p());
let src = self.context.new_cast(None, value, self.type_ptr_to(self.type_void()));
let size = self.context.new_rvalue_from_long(self.sizet_type, alloc.size().bytes() as i64);
self.global_init_block.add_eval(None, self.context.new_call(None, memcpy, &[dst, src, size]));
}
// As an optimization, all shared statics which do not have interior
// mutability are placed into read-only memory.
if !is_mutable {
if self.type_is_freeze(ty) {
// TODO
//llvm::LLVMSetGlobalConstant(global, llvm::True);
}
}
//debuginfo::create_global_var_metadata(&self, def_id, global);
if attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL) {
// Do not allow LLVM to change the alignment of a TLS on macOS.
//
// By default a global's alignment can be freely increased.
// This allows LLVM to generate more performant instructions
// e.g., using load-aligned into a SIMD register.
//
// However, on macOS 10.10 or below, the dynamic linker does not
// respect any alignment given on the TLS (radar 24221680).
// This will violate the alignment assumption, and causing segfault at runtime.
//
// This bug is very easy to trigger. In `println!` and `panic!`,
// the `LOCAL_STDOUT`/`LOCAL_STDERR` handles are stored in a TLS,
// which the values would be `mem::replace`d on initialization.
// The implementation of `mem::replace` will use SIMD
// whenever the size is 32 bytes or higher. LLVM notices SIMD is used
// and tries to align `LOCAL_STDOUT`/`LOCAL_STDERR` to a 32-byte boundary,
// which macOS's dyld disregarded and causing crashes
// (see issues #51794, #51758, #50867, #48866 and #44056).
//
// To workaround the bug, we trick LLVM into not increasing
// the global's alignment by explicitly assigning a section to it
// (equivalent to automatically generating a `#[link_section]` attribute).
// See the comment in the `GlobalValue::canIncreaseAlignment()` function
// of `lib/IR/Globals.cpp` for why this works.
//
// When the alignment is not increased, the optimized `mem::replace`
// will use load-unaligned instructions instead, and thus avoiding the crash.
//
// We could remove this hack whenever we decide to drop macOS 10.10 support.
if self.tcx.sess.target.options.is_like_osx {
// The `inspect` method is okay here because we checked relocations, and
// because we are doing this access to inspect the final interpreter state
// (not as part of the interpreter execution).
//
// FIXME: This check requires that the (arbitrary) value of undefined bytes
// happens to be zero. Instead, we should only check the value of defined bytes
// and set all undefined bytes to zero if this allocation is headed for the
// BSS.
/*let all_bytes_are_zero = alloc.relocations().is_empty()
&& alloc
.inspect_with_uninit_and_ptr_outside_interpreter(0..alloc.len())
.iter()
.all(|&byte| byte == 0);
let sect_name = if all_bytes_are_zero {
CStr::from_bytes_with_nul_unchecked(b"__DATA,__thread_bss\0")
} else {
CStr::from_bytes_with_nul_unchecked(b"__DATA,__thread_data\0")
};*/
unimplemented!();
//llvm::LLVMSetSection(global, sect_name.as_ptr());
}
}
// Wasm statics with custom link sections get special treatment as they
// go into custom sections of the wasm executable.
if self.tcx.sess.opts.target_triple.triple().starts_with("wasm32") {
if let Some(_section) = attrs.link_section {
unimplemented!();
/*let section = llvm::LLVMMDStringInContext(
self.llcx,
section.as_str().as_ptr().cast(),
section.as_str().len() as c_uint,
);
assert!(alloc.relocations().is_empty());
// The `inspect` method is okay here because we checked relocations, and
// because we are doing this access to inspect the final interpreter state (not
// as part of the interpreter execution).
let bytes =
alloc.inspect_with_uninit_and_ptr_outside_interpreter(0..alloc.len());
let alloc = llvm::LLVMMDStringInContext(
self.llcx,
bytes.as_ptr().cast(),
bytes.len() as c_uint,
);
let data = [section, alloc];
let meta = llvm::LLVMMDNodeInContext(self.llcx, data.as_ptr(), 2);
llvm::LLVMAddNamedMetadataOperand(
self.llmod,
"wasm.custom_sections\0".as_ptr().cast(),
meta,
);*/
}
} else {
// TODO
//base::set_link_section(global, &attrs);
}
if attrs.flags.contains(CodegenFnAttrFlags::USED) {
self.add_used_global(global);
}
}
/// Add a global value to a list to be stored in the `llvm.used` variable, an array of i8*.
fn add_used_global(&self, _global: RValue<'gcc>) {
// TODO
//let cast = self.context.new_cast(None, global, self.type_i8p());
//self.used_statics.borrow_mut().push(cast);
}
}
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn static_addr_of_mut(&self, cv: RValue<'gcc>, align: Align, kind: Option<&str>) -> RValue<'gcc> {
let (name, gv) =
match kind {
Some(kind) if !self.tcx.sess.fewer_names() => {
let name = self.generate_local_symbol_name(kind);
// TODO: check if it's okay that TLS is off here.
// TODO: check if it's okay that link_section is None here.
// TODO: set alignment here as well.
let gv = self.define_global(&name[..], self.val_ty(cv), false, None).unwrap_or_else(|| {
bug!("symbol `{}` is already defined", name);
});
//llvm::LLVMRustSetLinkage(gv, llvm::Linkage::PrivateLinkage);
(name, gv)
}
_ => {
let index = self.global_gen_sym_counter.get();
let name = format!("global_{}_{}", index, self.codegen_unit.name());
let typ = self.val_ty(cv).get_aligned(align.bytes());
let global = self.define_private_global(typ);
(name, global)
},
};
// FIXME: I think the name coming from generate_local_symbol_name() above cannot be used
// globally.
// NOTE: global seems to only be global in a module. So save the name instead of the value
// to import it later.
self.global_names.borrow_mut().insert(cv, name);
self.global_init_block.add_assignment(None, gv.dereference(None), cv);
//llvm::SetUnnamedAddress(gv, llvm::UnnamedAddr::Global);
gv
}
pub fn get_static(&self, def_id: DefId) -> RValue<'gcc> {
let instance = Instance::mono(self.tcx, def_id);
let fn_attrs = self.tcx.codegen_fn_attrs(def_id);
if let Some(&global) = self.instances.borrow().get(&instance) {
/*let attrs = self.tcx.codegen_fn_attrs(def_id);
let name = &*self.tcx.symbol_name(instance).name;
let name =
if let Some(linkage) = attrs.linkage {
// This is to match what happens in check_and_apply_linkage.
Cow::from(format!("_rust_extern_with_linkage_{}", name))
}
else {
Cow::from(name)
};
let global = self.context.new_global(None, GlobalKind::Imported, global.get_type(), &name)
.get_address(None);
self.global_names.borrow_mut().insert(global, name.to_string());*/
return global;
}
let defined_in_current_codegen_unit =
self.codegen_unit.items().contains_key(&MonoItem::Static(def_id));
assert!(
!defined_in_current_codegen_unit,
"consts::get_static() should always hit the cache for \
statics defined in the same CGU, but did not for `{:?}`",
def_id
);
let ty = instance.ty(self.tcx, ty::ParamEnv::reveal_all());
let sym = self.tcx.symbol_name(instance).name;
//debug!("get_static: sym={} instance={:?}", sym, instance);
let global =
if let Some(def_id) = def_id.as_local() {
let id = self.tcx.hir().local_def_id_to_hir_id(def_id);
let llty = self.layout_of(ty).gcc_type(self, true);
// FIXME: refactor this to work without accessing the HIR
let global = match self.tcx.hir().get(id) {
Node::Item(&hir::Item { span, kind: hir::ItemKind::Static(..), .. }) => {
if let Some(global) = self.get_declared_value(&sym) {
if self.val_ty(global) != self.type_ptr_to(llty) {
span_bug!(span, "Conflicting types for static");
}
}
let is_tls = fn_attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
let global = self.declare_global(&sym, llty, is_tls, fn_attrs.link_section);
if !self.tcx.is_reachable_non_generic(def_id) {
/*unsafe {
llvm::LLVMRustSetVisibility(global, llvm::Visibility::Hidden);
}*/
}
global
}
Node::ForeignItem(&hir::ForeignItem {
span,
kind: hir::ForeignItemKind::Static(..),
..
}) => {
let fn_attrs = self.tcx.codegen_fn_attrs(def_id);
check_and_apply_linkage(&self, &fn_attrs, ty, sym, span)
}
item => bug!("get_static: expected static, found {:?}", item),
};
//debug!("get_static: sym={} attrs={:?}", sym, attrs);
global
}
else {
// FIXME(nagisa): perhaps the map of externs could be offloaded to llvm somehow?
//debug!("get_static: sym={} item_attr={:?}", sym, self.tcx.item_attrs(def_id));
let attrs = self.tcx.codegen_fn_attrs(def_id);
let span = self.tcx.def_span(def_id);
let global = check_and_apply_linkage(&self, &attrs, ty, sym, span);
let needs_dll_storage_attr = false; /*self.use_dll_storage_attrs && !self.tcx.is_foreign_item(def_id) &&
// ThinLTO can't handle this workaround in all cases, so we don't
// emit the attrs. Instead we make them unnecessary by disallowing
// dynamic linking when linker plugin based LTO is enabled.
!self.tcx.sess.opts.cg.linker_plugin_lto.enabled();*/
// If this assertion triggers, there's something wrong with commandline
// argument validation.
debug_assert!(
!(self.tcx.sess.opts.cg.linker_plugin_lto.enabled()
&& self.tcx.sess.target.options.is_like_msvc
&& self.tcx.sess.opts.cg.prefer_dynamic)
);
if needs_dll_storage_attr {
// This item is external but not foreign, i.e., it originates from an external Rust
// crate. Since we don't know whether this crate will be linked dynamically or
// statically in the final application, we always mark such symbols as 'dllimport'.
// If final linkage happens to be static, we rely on compiler-emitted __imp_ stubs
// to make things work.
//
// However, in some scenarios we defer emission of statics to downstream
// crates, so there are cases where a static with an upstream DefId
// is actually present in the current crate. We can find out via the
// is_codegened_item query.
if !self.tcx.is_codegened_item(def_id) {
unimplemented!();
/*unsafe {
llvm::LLVMSetDLLStorageClass(global, llvm::DLLStorageClass::DllImport);
}*/
}
}
global
};
/*if self.use_dll_storage_attrs && self.tcx.is_dllimport_foreign_item(def_id) {
// For foreign (native) libs we know the exact storage type to use.
unsafe {
llvm::LLVMSetDLLStorageClass(global, llvm::DLLStorageClass::DllImport);
}
}*/
self.instances.borrow_mut().insert(instance, global);
global
}
}
pub fn const_alloc_to_gcc<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, alloc: &Allocation) -> RValue<'gcc> {
let mut llvals = Vec::with_capacity(alloc.relocations().len() + 1);
let dl = cx.data_layout();
let pointer_size = dl.pointer_size.bytes() as usize;
let mut next_offset = 0;
for &(offset, alloc_id) in alloc.relocations().iter() {
let offset = offset.bytes();
assert_eq!(offset as usize as u64, offset);
let offset = offset as usize;
if offset > next_offset {
// This `inspect` is okay since we have checked that it is not within a relocation, it
// is within the bounds of the allocation, and it doesn't affect interpreter execution
// (we inspect the result after interpreter execution). Any undef byte is replaced with
// some arbitrary byte value.
//
// FIXME: relay undef bytes to codegen as undef const bytes
let bytes = alloc.inspect_with_uninit_and_ptr_outside_interpreter(next_offset..offset);
llvals.push(cx.const_bytes(bytes));
}
let ptr_offset =
read_target_uint( dl.endian,
// This `inspect` is okay since it is within the bounds of the allocation, it doesn't
// affect interpreter execution (we inspect the result after interpreter execution),
// and we properly interpret the relocation as a relocation pointer offset.
alloc.inspect_with_uninit_and_ptr_outside_interpreter(offset..(offset + pointer_size)),
)
.expect("const_alloc_to_llvm: could not read relocation pointer")
as u64;
llvals.push(cx.scalar_to_backend(
InterpScalar::from_pointer(
interpret::Pointer::new(alloc_id, Size::from_bytes(ptr_offset)),
&cx.tcx,
),
&abi::Scalar { value: Primitive::Pointer, valid_range: 0..=!0 },
cx.type_i8p(),
));
next_offset = offset + pointer_size;
}
if alloc.len() >= next_offset {
let range = next_offset..alloc.len();
// This `inspect` is okay since we have check that it is after all relocations, it is
// within the bounds of the allocation, and it doesn't affect interpreter execution (we
// inspect the result after interpreter execution). Any undef byte is replaced with some
// arbitrary byte value.
//
// FIXME: relay undef bytes to codegen as undef const bytes
let bytes = alloc.inspect_with_uninit_and_ptr_outside_interpreter(range);
llvals.push(cx.const_bytes(bytes));
}
cx.const_struct(&llvals, true)
}
pub fn codegen_static_initializer<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, def_id: DefId) -> Result<(RValue<'gcc>, &'tcx Allocation), ErrorHandled> {
let alloc = cx.tcx.eval_static_initializer(def_id)?;
Ok((const_alloc_to_gcc(cx, alloc), alloc))
}
fn check_and_apply_linkage<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, attrs: &CodegenFnAttrs, ty: Ty<'tcx>, sym: &str, span: Span) -> RValue<'gcc> {
let is_tls = attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
let llty = cx.layout_of(ty).gcc_type(cx, true);
if let Some(linkage) = attrs.linkage {
//debug!("get_static: sym={} linkage={:?}", sym, linkage);
// If this is a static with a linkage specified, then we need to handle
// it a little specially. The typesystem prevents things like &T and
// extern "C" fn() from being non-null, so we can't just declare a
// static and call it a day. Some linkages (like weak) will make it such
// that the static actually has a null value.
let llty2 =
if let ty::RawPtr(ref mt) = ty.kind() {
cx.layout_of(mt.ty).gcc_type(cx, true)
}
else {
cx.sess().span_fatal(
span,
"must have type `*const T` or `*mut T` due to `#[linkage]` attribute",
)
};
// Declare a symbol `foo` with the desired linkage.
let global1 = cx.declare_global_with_linkage(&sym, llty2, base::global_linkage_to_gcc(linkage));
// Declare an internal global `extern_with_linkage_foo` which
// is initialized with the address of `foo`. If `foo` is
// discarded during linking (for example, if `foo` has weak
// linkage and there are no definitions), then
// `extern_with_linkage_foo` will instead be initialized to
// zero.
let mut real_name = "_rust_extern_with_linkage_".to_string();
real_name.push_str(&sym);
let global2 =
cx.define_global(&real_name, llty, is_tls, attrs.link_section).unwrap_or_else(|| {
cx.sess().span_fatal(span, &format!("symbol `{}` is already defined", &sym))
});
//llvm::LLVMRustSetLinkage(global2, llvm::Linkage::InternalLinkage);
let lvalue = global2.dereference(None);
cx.global_init_block.add_assignment(None, lvalue, global1);
//llvm::LLVMSetInitializer(global2, global1);
global2
}
else {
// Generate an external declaration.
// FIXME(nagisa): investigate whether it can be changed into define_global
// Thread-local statics in some other crate need to *always* be linked
// against in a thread-local fashion, so we need to be sure to apply the
// thread-local attribute locally if it was present remotely. If we
// don't do this then linker errors can be generated where the linker
// complains that one object files has a thread local version of the
// symbol and another one doesn't.
cx.declare_global(&sym, llty, is_tls, attrs.link_section)
}
}

491
compiler/rustc_codegen_gcc/src/context.rs Normal file
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@ -0,0 +1,491 @@
use std::cell::{Cell, RefCell};
use gccjit::{
Block,
Context,
CType,
Function,
FunctionType,
LValue,
RValue,
Struct,
Type,
};
use rustc_codegen_ssa::base::wants_msvc_seh;
use rustc_codegen_ssa::traits::{
BackendTypes,
BaseTypeMethods,
MiscMethods,
};
use rustc_data_structures::base_n;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_middle::bug;
use rustc_middle::mir::mono::CodegenUnit;
use rustc_middle::ty::{self, Instance, ParamEnv, PolyExistentialTraitRef, Ty, TyCtxt};
use rustc_middle::ty::layout::{HasParamEnv, HasTyCtxt, LayoutError, TyAndLayout};
use rustc_session::Session;
use rustc_span::{Span, Symbol, DUMMY_SP};
use rustc_target::abi::{HasDataLayout, LayoutOf, PointeeInfo, Size, TargetDataLayout, VariantIdx};
use rustc_target::spec::{HasTargetSpec, Target, TlsModel};
use crate::callee::get_fn;
use crate::declare::mangle_name;
#[derive(Clone)]
pub struct FuncSig<'gcc> {
pub params: Vec<Type<'gcc>>,
pub return_type: Type<'gcc>,
}
pub struct CodegenCx<'gcc, 'tcx> {
pub check_overflow: bool,
pub codegen_unit: &'tcx CodegenUnit<'tcx>,
pub context: &'gcc Context<'gcc>,
// TODO: First set it to a dummy block to avoid using Option?
pub current_block: RefCell<Option<Block<'gcc>>>,
pub current_func: RefCell<Option<Function<'gcc>>>,
pub normal_function_addresses: RefCell<FxHashSet<RValue<'gcc>>>,
/// The function where globals are initialized.
pub global_init_func: Function<'gcc>,
pub global_init_block: Block<'gcc>,
pub functions: RefCell<FxHashMap<String, Function<'gcc>>>,
pub tls_model: gccjit::TlsModel,
pub bool_type: Type<'gcc>,
pub i8_type: Type<'gcc>,
pub i16_type: Type<'gcc>,
pub i32_type: Type<'gcc>,
pub i64_type: Type<'gcc>,
pub i128_type: Type<'gcc>,
pub isize_type: Type<'gcc>,
pub u8_type: Type<'gcc>,
pub u16_type: Type<'gcc>,
pub u32_type: Type<'gcc>,
pub u64_type: Type<'gcc>,
pub u128_type: Type<'gcc>,
pub usize_type: Type<'gcc>,
pub int_type: Type<'gcc>,
pub uint_type: Type<'gcc>,
pub long_type: Type<'gcc>,
pub ulong_type: Type<'gcc>,
pub ulonglong_type: Type<'gcc>,
pub sizet_type: Type<'gcc>,
pub float_type: Type<'gcc>,
pub double_type: Type<'gcc>,
pub linkage: Cell<FunctionType>,
pub scalar_types: RefCell<FxHashMap<Ty<'tcx>, Type<'gcc>>>,
pub types: RefCell<FxHashMap<(Ty<'tcx>, Option<VariantIdx>), Type<'gcc>>>,
pub tcx: TyCtxt<'tcx>,
pub struct_types: RefCell<FxHashMap<Vec<Type<'gcc>>, Type<'gcc>>>,
pub types_with_fields_to_set: RefCell<FxHashMap<Type<'gcc>, (Struct<'gcc>, TyAndLayout<'tcx>)>>,
/// Cache instances of monomorphic and polymorphic items
pub instances: RefCell<FxHashMap<Instance<'tcx>, RValue<'gcc>>>,
/// Cache generated vtables
pub vtables: RefCell<FxHashMap<(Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>), RValue<'gcc>>>,
/// Cache of emitted const globals (value -> global)
pub const_globals: RefCell<FxHashMap<RValue<'gcc>, RValue<'gcc>>>,
pub init_argv_var: RefCell<String>,
pub argv_initialized: Cell<bool>,
/// Cache of constant strings,
pub const_cstr_cache: RefCell<FxHashMap<Symbol, LValue<'gcc>>>,
/// Cache of globals.
pub globals: RefCell<FxHashMap<String, RValue<'gcc>>>,
// TODO: remove global_names.
pub global_names: RefCell<FxHashMap<RValue<'gcc>, String>>,
/// A counter that is used for generating local symbol names
local_gen_sym_counter: Cell<usize>,
pub global_gen_sym_counter: Cell<usize>,
eh_personality: Cell<Option<RValue<'gcc>>>,
pub pointee_infos: RefCell<FxHashMap<(Ty<'tcx>, Size), Option<PointeeInfo>>>,
/// NOTE: a hack is used because the rustc API is not suitable to libgccjit and as such,
/// `const_undef()` returns struct as pointer so that they can later be assigned a value.
/// As such, this set remembers which of these pointers were returned by this function so that
/// they can be derefered later.
/// FIXME: fix the rustc API to avoid having this hack.
pub structs_as_pointer: RefCell<FxHashSet<RValue<'gcc>>>,
/// Store the pointer of different types for safety.
/// When casting the values back to their original types, check that they are indeed that type
/// with these sets.
/// FIXME: remove when the API supports more types.
#[cfg(debug_assertions)]
lvalues: RefCell<FxHashSet<LValue<'gcc>>>,
}
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn new(context: &'gcc Context<'gcc>, codegen_unit: &'tcx CodegenUnit<'tcx>, tcx: TyCtxt<'tcx>) -> Self {
let check_overflow = tcx.sess.overflow_checks();
// TODO: fix this mess. libgccjit seems to return random type when using new_int_type().
//let isize_type = context.new_int_type((tcx.data_layout.pointer_size.bits() / 8) as i32, true);
let isize_type = context.new_c_type(CType::LongLong);
//let usize_type = context.new_int_type((tcx.data_layout.pointer_size.bits() / 8) as i32, false);
let usize_type = context.new_c_type(CType::ULongLong);
let bool_type = context.new_type::<bool>();
let i8_type = context.new_type::<i8>();
let i16_type = context.new_type::<i16>();
let i32_type = context.new_type::<i32>();
let i64_type = context.new_c_type(CType::LongLong);
let i128_type = context.new_c_type(CType::Int128t).get_aligned(8); // TODO: should this be hard-coded?
let u8_type = context.new_type::<u8>();
let u16_type = context.new_type::<u16>();
let u32_type = context.new_type::<u32>();
let u64_type = context.new_c_type(CType::ULongLong);
let u128_type = context.new_c_type(CType::UInt128t).get_aligned(8); // TODO: should this be hard-coded?
let tls_model = to_gcc_tls_mode(tcx.sess.tls_model());
let float_type = context.new_type::<f32>();
let double_type = context.new_type::<f64>();
let int_type = context.new_c_type(CType::Int);
let uint_type = context.new_c_type(CType::UInt);
let long_type = context.new_c_type(CType::Long);
let ulong_type = context.new_c_type(CType::ULong);
let ulonglong_type = context.new_c_type(CType::ULongLong);
let sizet_type = context.new_c_type(CType::SizeT);
assert_eq!(isize_type, i64_type);
assert_eq!(usize_type, u64_type);
let mut functions = FxHashMap::default();
let builtins = [
"__builtin_unreachable", "abort", "__builtin_expect", "__builtin_add_overflow", "__builtin_mul_overflow",
"__builtin_saddll_overflow", /*"__builtin_sadd_overflow",*/ "__builtin_smulll_overflow", /*"__builtin_smul_overflow",*/
"__builtin_ssubll_overflow", /*"__builtin_ssub_overflow",*/ "__builtin_sub_overflow", "__builtin_uaddll_overflow",
"__builtin_uadd_overflow", "__builtin_umulll_overflow", "__builtin_umul_overflow", "__builtin_usubll_overflow",
"__builtin_usub_overflow", "sqrtf", "sqrt", "__builtin_powif", "__builtin_powi", "sinf", "sin", "cosf", "cos",
"powf", "pow", "expf", "exp", "exp2f", "exp2", "logf", "log", "log10f", "log10", "log2f", "log2", "fmaf",
"fma", "fabsf", "fabs", "fminf", "fmin", "fmaxf", "fmax", "copysignf", "copysign", "floorf", "floor", "ceilf",
"ceil", "truncf", "trunc", "rintf", "rint", "nearbyintf", "nearbyint", "roundf", "round",
"__builtin_expect_with_probability",
];
for builtin in builtins.iter() {
functions.insert(builtin.to_string(), context.get_builtin_function(builtin));
}
let global_init_func = context.new_function(None, FunctionType::Exported, context.new_type::<()>(), &[],
&format!("__gccGlobalInit{}", unit_name(&codegen_unit)), false);
let global_init_block = global_init_func.new_block("initial");
Self {
check_overflow,
codegen_unit,
context,
current_block: RefCell::new(None),
current_func: RefCell::new(None),
normal_function_addresses: Default::default(),
functions: RefCell::new(functions),
global_init_func,
global_init_block,
tls_model,
bool_type,
i8_type,
i16_type,
i32_type,
i64_type,
i128_type,
isize_type,
usize_type,
u8_type,
u16_type,
u32_type,
u64_type,
u128_type,
int_type,
uint_type,
long_type,
ulong_type,
ulonglong_type,
sizet_type,
float_type,
double_type,
linkage: Cell::new(FunctionType::Internal),
#[cfg(debug_assertions)]
lvalues: Default::default(),
instances: Default::default(),
vtables: Default::default(),
const_globals: Default::default(),
init_argv_var: RefCell::new(String::new()),
argv_initialized: Cell::new(false),
const_cstr_cache: Default::default(),
global_names: Default::default(),
globals: Default::default(),
scalar_types: Default::default(),
types: Default::default(),
tcx,
struct_types: Default::default(),
types_with_fields_to_set: Default::default(),
local_gen_sym_counter: Cell::new(0),
global_gen_sym_counter: Cell::new(0),
eh_personality: Cell::new(None),
pointee_infos: Default::default(),
structs_as_pointer: Default::default(),
}
}
pub fn lvalue_to_rvalue(&self, value: LValue<'gcc>) -> RValue<'gcc> {
#[cfg(debug_assertions)]
self.lvalues.borrow_mut().insert(value);
unsafe { std::mem::transmute(value) }
}
pub fn rvalue_as_function(&self, value: RValue<'gcc>) -> Function<'gcc> {
let function: Function<'gcc> = unsafe { std::mem::transmute(value) };
debug_assert!(self.functions.borrow().values().find(|value| **value == function).is_some(),
"{:?} ({:?}) is not a function", value, value.get_type());
function
}
pub fn rvalue_as_lvalue(&self, value: RValue<'gcc>) -> LValue<'gcc> {
let lvalue: LValue<'gcc> = unsafe { std::mem::transmute(value) };
//debug_assert!(self.lvalues.borrow().contains(&lvalue), "{:?} is not an lvalue", value);
lvalue
}
pub fn sess(&self) -> &Session {
&self.tcx.sess
}
}
impl<'gcc, 'tcx> BackendTypes for CodegenCx<'gcc, 'tcx> {
type Value = RValue<'gcc>;
type Function = RValue<'gcc>;
type BasicBlock = Block<'gcc>;
type Type = Type<'gcc>;
type Funclet = (); // TODO
type DIScope = (); // TODO
type DILocation = (); // TODO
type DIVariable = (); // TODO
}
impl<'gcc, 'tcx> MiscMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn vtables(&self) -> &RefCell<FxHashMap<(Ty<'tcx>, Option<PolyExistentialTraitRef<'tcx>>), RValue<'gcc>>> {
&self.vtables
}
fn get_fn(&self, instance: Instance<'tcx>) -> RValue<'gcc> {
let func = get_fn(self, instance);
*self.current_func.borrow_mut() = Some(self.rvalue_as_function(func));
func
}
fn get_fn_addr(&self, instance: Instance<'tcx>) -> RValue<'gcc> {
//let symbol = self.tcx.symbol_name(instance).name;
let func = get_fn(self, instance);
let func = self.rvalue_as_function(func);
let ptr = func.get_address(None);
// TODO: don't do this twice: i.e. in declare_fn and here.
//let fn_abi = FnAbi::of_instance(self, instance, &[]);
//let (return_type, params, _) = fn_abi.gcc_type(self);
// FIXME: the rustc API seems to call get_fn_addr() when not needed (e.g. for FFI).
//let pointer_type = ptr.get_type();
self.normal_function_addresses.borrow_mut().insert(ptr);
ptr
}
fn eh_personality(&self) -> RValue<'gcc> {
// The exception handling personality function.
//
// If our compilation unit has the `eh_personality` lang item somewhere
// within it, then we just need to codegen that. Otherwise, we're
// building an rlib which will depend on some upstream implementation of
// this function, so we just codegen a generic reference to it. We don't
// specify any of the types for the function, we just make it a symbol
// that LLVM can later use.
//
// Note that MSVC is a little special here in that we don't use the
// `eh_personality` lang item at all. Currently LLVM has support for
// both Dwarf and SEH unwind mechanisms for MSVC targets and uses the
// *name of the personality function* to decide what kind of unwind side
// tables/landing pads to emit. It looks like Dwarf is used by default,
// injecting a dependency on the `_Unwind_Resume` symbol for resuming
// an "exception", but for MSVC we want to force SEH. This means that we
// can't actually have the personality function be our standard
// `rust_eh_personality` function, but rather we wired it up to the
// CRT's custom personality function, which forces LLVM to consider
// landing pads as "landing pads for SEH".
if let Some(llpersonality) = self.eh_personality.get() {
return llpersonality;
}
let tcx = self.tcx;
let llfn = match tcx.lang_items().eh_personality() {
Some(def_id) if !wants_msvc_seh(self.sess()) => self.get_fn_addr(
ty::Instance::resolve(
tcx,
ty::ParamEnv::reveal_all(),
def_id,
tcx.intern_substs(&[]),
)
.unwrap().unwrap(),
),
_ => {
let name = if wants_msvc_seh(self.sess()) {
"__CxxFrameHandler3"
} else {
"rust_eh_personality"
};
self.declare_func(name, self.type_i32(), &[], true)
}
};
//attributes::apply_target_cpu_attr(self, llfn);
self.eh_personality.set(Some(llfn));
llfn
}
fn sess(&self) -> &Session {
&self.tcx.sess
}
fn check_overflow(&self) -> bool {
self.check_overflow
}
fn codegen_unit(&self) -> &'tcx CodegenUnit<'tcx> {
self.codegen_unit
}
fn used_statics(&self) -> &RefCell<Vec<RValue<'gcc>>> {
unimplemented!();
//&self.used_statics
}
fn set_frame_pointer_type(&self, _llfn: RValue<'gcc>) {
// TODO
//attributes::set_frame_pointer_type(self, llfn)
}
fn apply_target_cpu_attr(&self, _llfn: RValue<'gcc>) {
// TODO
//attributes::apply_target_cpu_attr(self, llfn)
}
fn create_used_variable(&self) {
unimplemented!();
/*let name = const_cstr!("llvm.used");
let section = const_cstr!("llvm.metadata");
let array =
self.const_array(&self.type_ptr_to(self.type_i8()), &*self.used_statics.borrow());
unsafe {
let g = llvm::LLVMAddGlobal(self.llmod, self.val_ty(array), name.as_ptr());
llvm::LLVMSetInitializer(g, array);
llvm::LLVMRustSetLinkage(g, llvm::Linkage::AppendingLinkage);
llvm::LLVMSetSection(g, section.as_ptr());
}*/
}
fn declare_c_main(&self, fn_type: Self::Type) -> Option<Self::Function> {
if self.get_declared_value("main").is_none() {
Some(self.declare_cfn("main", fn_type))
}
else {
// If the symbol already exists, it is an error: for example, the user wrote
// #[no_mangle] extern "C" fn main(..) {..}
// instead of #[start]
None
}
}
}
impl<'gcc, 'tcx> HasTyCtxt<'tcx> for CodegenCx<'gcc, 'tcx> {
fn tcx(&self) -> TyCtxt<'tcx> {
self.tcx
}
}
impl<'gcc, 'tcx> HasDataLayout for CodegenCx<'gcc, 'tcx> {
fn data_layout(&self) -> &TargetDataLayout {
&self.tcx.data_layout
}
}
impl<'gcc, 'tcx> HasTargetSpec for CodegenCx<'gcc, 'tcx> {
fn target_spec(&self) -> &Target {
&self.tcx.sess.target
}
}
impl<'gcc, 'tcx> LayoutOf for CodegenCx<'gcc, 'tcx> {
type Ty = Ty<'tcx>;
type TyAndLayout = TyAndLayout<'tcx>;
fn layout_of(&self, ty: Ty<'tcx>) -> Self::TyAndLayout {
self.spanned_layout_of(ty, DUMMY_SP)
}
fn spanned_layout_of(&self, ty: Ty<'tcx>, span: Span) -> Self::TyAndLayout {
self.tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap_or_else(|e| {
if let LayoutError::SizeOverflow(_) = e {
self.sess().span_fatal(span, &e.to_string())
} else {
bug!("failed to get layout for `{}`: {}", ty, e)
}
})
}
}
impl<'tcx, 'gcc> HasParamEnv<'tcx> for CodegenCx<'gcc, 'tcx> {
fn param_env(&self) -> ParamEnv<'tcx> {
ParamEnv::reveal_all()
}
}
impl<'b, 'tcx> CodegenCx<'b, 'tcx> {
/// Generates a new symbol name with the given prefix. This symbol name must
/// only be used for definitions with `internal` or `private` linkage.
pub fn generate_local_symbol_name(&self, prefix: &str) -> String {
let idx = self.local_gen_sym_counter.get();
self.local_gen_sym_counter.set(idx + 1);
// Include a '.' character, so there can be no accidental conflicts with
// user defined names
let mut name = String::with_capacity(prefix.len() + 6);
name.push_str(prefix);
name.push_str(".");
base_n::push_str(idx as u128, base_n::ALPHANUMERIC_ONLY, &mut name);
name
}
}
pub fn unit_name<'tcx>(codegen_unit: &CodegenUnit<'tcx>) -> String {
let name = &codegen_unit.name().to_string();
mangle_name(&name.replace('-', "_"))
}
fn to_gcc_tls_mode(tls_model: TlsModel) -> gccjit::TlsModel {
match tls_model {
TlsModel::GeneralDynamic => gccjit::TlsModel::GlobalDynamic,
TlsModel::LocalDynamic => gccjit::TlsModel::LocalDynamic,
TlsModel::InitialExec => gccjit::TlsModel::InitialExec,
TlsModel::LocalExec => gccjit::TlsModel::LocalExec,
}
}

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use gccjit::RValue;
use rustc_codegen_ssa::traits::{CoverageInfoBuilderMethods, CoverageInfoMethods};
use rustc_hir::def_id::DefId;
use rustc_middle::mir::coverage::{
CodeRegion,
CounterValueReference,
ExpressionOperandId,
InjectedExpressionId,
Op,
};
use rustc_middle::ty::Instance;
use crate::builder::Builder;
use crate::context::CodegenCx;
impl<'a, 'gcc, 'tcx> CoverageInfoBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
fn set_function_source_hash(
&mut self,
_instance: Instance<'tcx>,
_function_source_hash: u64,
) -> bool {
unimplemented!();
/*if let Some(coverage_context) = self.coverage_context() {
debug!(
"ensuring function source hash is set for instance={:?}; function_source_hash={}",
instance, function_source_hash,
);
let mut coverage_map = coverage_context.function_coverage_map.borrow_mut();
coverage_map
.entry(instance)
.or_insert_with(|| FunctionCoverage::new(self.tcx, instance))
.set_function_source_hash(function_source_hash);
true
} else {
false
}*/
}
fn add_coverage_counter(&mut self, _instance: Instance<'tcx>, _id: CounterValueReference, _region: CodeRegion) -> bool {
/*if let Some(coverage_context) = self.coverage_context() {
debug!(
"adding counter to coverage_regions: instance={:?}, function_source_hash={}, id={:?}, \
at {:?}",
instance, function_source_hash, id, region,
);
let mut coverage_regions = coverage_context.function_coverage_map.borrow_mut();
coverage_regions
.entry(instance)
.or_insert_with(|| FunctionCoverage::new(self.tcx, instance))
.add_counter(function_source_hash, id, region);
true
} else {
false
}*/
// TODO
false
}
fn add_coverage_counter_expression(&mut self, _instance: Instance<'tcx>, _id: InjectedExpressionId, _lhs: ExpressionOperandId, _op: Op, _rhs: ExpressionOperandId, _region: Option<CodeRegion>) -> bool {
/*if let Some(coverage_context) = self.coverage_context() {
debug!(
"adding counter expression to coverage_regions: instance={:?}, id={:?}, {:?} {:?} {:?}, \
at {:?}",
instance, id, lhs, op, rhs, region,
);
let mut coverage_regions = coverage_context.function_coverage_map.borrow_mut();
coverage_regions
.entry(instance)
.or_insert_with(|| FunctionCoverage::new(self.tcx, instance))
.add_counter_expression(id, lhs, op, rhs, region);
true
} else {
false
}*/
// TODO
false
}
fn add_coverage_unreachable(&mut self, _instance: Instance<'tcx>, _region: CodeRegion) -> bool {
/*if let Some(coverage_context) = self.coverage_context() {
debug!(
"adding unreachable code to coverage_regions: instance={:?}, at {:?}",
instance, region,
);
let mut coverage_regions = coverage_context.function_coverage_map.borrow_mut();
coverage_regions
.entry(instance)
.or_insert_with(|| FunctionCoverage::new(self.tcx, instance))
.add_unreachable_region(region);
true
} else {
false
}*/
// TODO
false
}
}
impl<'gcc, 'tcx> CoverageInfoMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn coverageinfo_finalize(&self) {
// TODO
//mapgen::finalize(self)
}
fn get_pgo_func_name_var(&self, _instance: Instance<'tcx>) -> RValue<'gcc> {
unimplemented!();
/*if let Some(coverage_context) = self.coverage_context() {
debug!("getting pgo_func_name_var for instance={:?}", instance);
let mut pgo_func_name_var_map = coverage_context.pgo_func_name_var_map.borrow_mut();
pgo_func_name_var_map
.entry(instance)
.or_insert_with(|| create_pgo_func_name_var(self, instance))
} else {
bug!("Could not get the `coverage_context`");
}*/
}
/// Functions with MIR-based coverage are normally codegenned _only_ if
/// called. LLVM coverage tools typically expect every function to be
/// defined (even if unused), with at least one call to LLVM intrinsic
/// `instrprof.increment`.
///
/// Codegen a small function that will never be called, with one counter
/// that will never be incremented.
///
/// For used/called functions, the coverageinfo was already added to the
/// `function_coverage_map` (keyed by function `Instance`) during codegen.
/// But in this case, since the unused function was _not_ previously
/// codegenned, collect the coverage `CodeRegion`s from the MIR and add
/// them. The first `CodeRegion` is used to add a single counter, with the
/// same counter ID used in the injected `instrprof.increment` intrinsic
/// call. Since the function is never called, all other `CodeRegion`s can be
/// added as `unreachable_region`s.
fn define_unused_fn(&self, _def_id: DefId) {
unimplemented!();
/*let instance = declare_unused_fn(self, &def_id);
codegen_unused_fn_and_counter(self, instance);
add_unused_function_coverage(self, instance, def_id);*/
}
}

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use gccjit::{FunctionType, RValue};
use rustc_codegen_ssa::mir::debuginfo::{FunctionDebugContext, VariableKind};
use rustc_codegen_ssa::traits::{BuilderMethods, DebugInfoBuilderMethods, DebugInfoMethods};
use rustc_middle::middle::cstore::CrateDepKind;
use rustc_middle::mir;
use rustc_middle::ty::{Instance, Ty};
use rustc_span::{SourceFile, Span, Symbol};
use rustc_span::def_id::LOCAL_CRATE;
use rustc_target::abi::Size;
use rustc_target::abi::call::FnAbi;
use crate::builder::Builder;
use crate::context::CodegenCx;
impl<'a, 'gcc, 'tcx> DebugInfoBuilderMethods for Builder<'a, 'gcc, 'tcx> {
// FIXME(eddyb) find a common convention for all of the debuginfo-related
// names (choose between `dbg`, `debug`, `debuginfo`, `debug_info` etc.).
fn dbg_var_addr(&mut self, _dbg_var: Self::DIVariable, _scope_metadata: Self::DIScope, _variable_alloca: Self::Value, _direct_offset: Size, _indirect_offsets: &[Size]) {
unimplemented!();
/*let cx = self.cx();
// Convert the direct and indirect offsets to address ops.
// FIXME(eddyb) use `const`s instead of getting the values via FFI,
// the values should match the ones in the DWARF standard anyway.
let op_deref = || unsafe { llvm::LLVMRustDIBuilderCreateOpDeref() };
let op_plus_uconst = || unsafe { llvm::LLVMRustDIBuilderCreateOpPlusUconst() };
let mut addr_ops = SmallVec::<[_; 8]>::new();
if direct_offset.bytes() > 0 {
addr_ops.push(op_plus_uconst());
addr_ops.push(direct_offset.bytes() as i64);
}
for &offset in indirect_offsets {
addr_ops.push(op_deref());
if offset.bytes() > 0 {
addr_ops.push(op_plus_uconst());
addr_ops.push(offset.bytes() as i64);
}
}
// FIXME(eddyb) maybe this information could be extracted from `dbg_var`,
// to avoid having to pass it down in both places?
// NB: `var` doesn't seem to know about the column, so that's a limitation.
let dbg_loc = cx.create_debug_loc(scope_metadata, span);
unsafe {
// FIXME(eddyb) replace `llvm.dbg.declare` with `llvm.dbg.addr`.
llvm::LLVMRustDIBuilderInsertDeclareAtEnd(
DIB(cx),
variable_alloca,
dbg_var,
addr_ops.as_ptr(),
addr_ops.len() as c_uint,
dbg_loc,
self.llbb(),
);
}*/
}
/*fn set_source_location(&mut self, scope: Self::DIScope, span: Span) {
unimplemented!();
/*debug!("set_source_location: {}", self.sess().source_map().span_to_string(span));
let dbg_loc = self.cx().create_debug_loc(scope, span);
unsafe {
llvm::LLVMSetCurrentDebugLocation(self.llbuilder, dbg_loc);
}*/
}*/
fn insert_reference_to_gdb_debug_scripts_section_global(&mut self) {
// TODO: replace with gcc_jit_context_new_global_with_initializer() if it's added:
// https://gcc.gnu.org/pipermail/jit/2020q3/001225.html
//
// Call the function to initialize global values here.
// We assume this is only called for the main function.
use std::iter;
for crate_num in self.cx.tcx.crates(()).iter().copied().chain(iter::once(LOCAL_CRATE)) {
// FIXME: better way to find if a crate is of proc-macro type?
if crate_num == LOCAL_CRATE || self.cx.tcx.dep_kind(crate_num) != CrateDepKind::MacrosOnly {
// NOTE: proc-macro crates are not included in the executable, so don't call their
// initialization routine.
let initializer_name = format!("__gccGlobalCrateInit{}", self.cx.tcx.crate_name(crate_num));
let codegen_init_func = self.context.new_function(None, FunctionType::Extern, self.context.new_type::<()>(), &[],
initializer_name, false);
self.llbb().add_eval(None, self.context.new_call(None, codegen_init_func, &[]));
}
}
// TODO
//gdb::insert_reference_to_gdb_debug_scripts_section_global(self)
}
fn set_var_name(&mut self, _value: RValue<'gcc>, _name: &str) {
unimplemented!();
// Avoid wasting time if LLVM value names aren't even enabled.
/*if self.sess().fewer_names() {
return;
}
// Only function parameters and instructions are local to a function,
// don't change the name of anything else (e.g. globals).
let param_or_inst = unsafe {
llvm::LLVMIsAArgument(value).is_some() || llvm::LLVMIsAInstruction(value).is_some()
};
if !param_or_inst {
return;
}
// Avoid replacing the name if it already exists.
// While we could combine the names somehow, it'd
// get noisy quick, and the usefulness is dubious.
if llvm::get_value_name(value).is_empty() {
llvm::set_value_name(value, name.as_bytes());
}*/
}
fn set_dbg_loc(&mut self, _dbg_loc: Self::DILocation) {
unimplemented!();
/*unsafe {
let dbg_loc_as_llval = llvm::LLVMRustMetadataAsValue(self.cx().llcx, dbg_loc);
llvm::LLVMSetCurrentDebugLocation(self.llbuilder, dbg_loc_as_llval);
}*/
}
}
impl<'gcc, 'tcx> DebugInfoMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn create_vtable_metadata(&self, _ty: Ty<'tcx>, _vtable: Self::Value) {
//metadata::create_vtable_metadata(self, ty, vtable)
}
fn create_function_debug_context(&self, _instance: Instance<'tcx>, _fn_abi: &FnAbi<'tcx, Ty<'tcx>>, _llfn: RValue<'gcc>, _mir: &mir::Body<'tcx>) -> Option<FunctionDebugContext<Self::DIScope, Self::DILocation>> {
// TODO
None
}
fn extend_scope_to_file(&self, _scope_metadata: Self::DIScope, _file: &SourceFile) -> Self::DIScope {
unimplemented!();
}
fn debuginfo_finalize(&self) {
//unimplemented!();
}
fn create_dbg_var(&self, _variable_name: Symbol, _variable_type: Ty<'tcx>, _scope_metadata: Self::DIScope, _variable_kind: VariableKind, _span: Span) -> Self::DIVariable {
unimplemented!();
}
fn dbg_scope_fn(&self, _instance: Instance<'tcx>, _fn_abi: &FnAbi<'tcx, Ty<'tcx>>, _maybe_definition_llfn: Option<RValue<'gcc>>) -> Self::DIScope {
unimplemented!();
/*let def_id = instance.def_id();
let containing_scope = get_containing_scope(self, instance);
let span = self.tcx.def_span(def_id);
let loc = self.lookup_debug_loc(span.lo());
let file_metadata = file_metadata(self, &loc.file);
let function_type_metadata = unsafe {
let fn_signature = get_function_signature(self, fn_abi);
llvm::LLVMRustDIBuilderCreateSubroutineType(DIB(self), fn_signature)
};
// Find the enclosing function, in case this is a closure.
let def_key = self.tcx().def_key(def_id);
let mut name = def_key.disambiguated_data.data.to_string();
let enclosing_fn_def_id = self.tcx().closure_base_def_id(def_id);
// Get_template_parameters() will append a `<...>` clause to the function
// name if necessary.
let generics = self.tcx().generics_of(enclosing_fn_def_id);
let substs = instance.substs.truncate_to(self.tcx(), generics);
let template_parameters = get_template_parameters(self, &generics, substs, &mut name);
let linkage_name = &mangled_name_of_instance(self, instance).name;
// Omit the linkage_name if it is the same as subprogram name.
let linkage_name = if &name == linkage_name { "" } else { linkage_name };
// FIXME(eddyb) does this need to be separate from `loc.line` for some reason?
let scope_line = loc.line;
let mut flags = DIFlags::FlagPrototyped;
if fn_abi.ret.layout.abi.is_uninhabited() {
flags |= DIFlags::FlagNoReturn;
}
let mut spflags = DISPFlags::SPFlagDefinition;
if is_node_local_to_unit(self, def_id) {
spflags |= DISPFlags::SPFlagLocalToUnit;
}
if self.sess().opts.optimize != config::OptLevel::No {
spflags |= DISPFlags::SPFlagOptimized;
}
if let Some((id, _)) = self.tcx.entry_fn(LOCAL_CRATE) {
if id.to_def_id() == def_id {
spflags |= DISPFlags::SPFlagMainSubprogram;
}
}
unsafe {
return llvm::LLVMRustDIBuilderCreateFunction(
DIB(self),
containing_scope,
name.as_ptr().cast(),
name.len(),
linkage_name.as_ptr().cast(),
linkage_name.len(),
file_metadata,
loc.line.unwrap_or(UNKNOWN_LINE_NUMBER),
function_type_metadata,
scope_line.unwrap_or(UNKNOWN_LINE_NUMBER),
flags,
spflags,
maybe_definition_llfn,
template_parameters,
None,
);
}
fn get_function_signature<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
) -> &'ll DIArray {
if cx.sess().opts.debuginfo == DebugInfo::Limited {
return create_DIArray(DIB(cx), &[]);
}
let mut signature = Vec::with_capacity(fn_abi.args.len() + 1);
// Return type -- llvm::DIBuilder wants this at index 0
signature.push(if fn_abi.ret.is_ignore() {
None
} else {
Some(type_metadata(cx, fn_abi.ret.layout.ty, rustc_span::DUMMY_SP))
});
// Arguments types
if cx.sess().target.options.is_like_msvc {
// FIXME(#42800):
// There is a bug in MSDIA that leads to a crash when it encounters
// a fixed-size array of `u8` or something zero-sized in a
// function-type (see #40477).
// As a workaround, we replace those fixed-size arrays with a
// pointer-type. So a function `fn foo(a: u8, b: [u8; 4])` would
// appear as `fn foo(a: u8, b: *const u8)` in debuginfo,
// and a function `fn bar(x: [(); 7])` as `fn bar(x: *const ())`.
// This transformed type is wrong, but these function types are
// already inaccurate due to ABI adjustments (see #42800).
signature.extend(fn_abi.args.iter().map(|arg| {
let t = arg.layout.ty;
let t = match t.kind() {
ty::Array(ct, _)
if (*ct == cx.tcx.types.u8) || cx.layout_of(ct).is_zst() =>
{
cx.tcx.mk_imm_ptr(ct)
}
_ => t,
};
Some(type_metadata(cx, t, rustc_span::DUMMY_SP))
}));
} else {
signature.extend(
fn_abi
.args
.iter()
.map(|arg| Some(type_metadata(cx, arg.layout.ty, rustc_span::DUMMY_SP))),
);
}
create_DIArray(DIB(cx), &signature[..])
}
fn get_template_parameters<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
generics: &ty::Generics,
substs: SubstsRef<'tcx>,
name_to_append_suffix_to: &mut String,
) -> &'ll DIArray {
if substs.types().next().is_none() {
return create_DIArray(DIB(cx), &[]);
}
name_to_append_suffix_to.push('<');
for (i, actual_type) in substs.types().enumerate() {
if i != 0 {
name_to_append_suffix_to.push(',');
}
let actual_type =
cx.tcx.normalize_erasing_regions(ParamEnv::reveal_all(), actual_type);
// Add actual type name to <...> clause of function name
let actual_type_name = compute_debuginfo_type_name(cx.tcx(), actual_type, true);
name_to_append_suffix_to.push_str(&actual_type_name[..]);
}
name_to_append_suffix_to.push('>');
// Again, only create type information if full debuginfo is enabled
let template_params: Vec<_> = if cx.sess().opts.debuginfo == DebugInfo::Full {
let names = get_parameter_names(cx, generics);
substs
.iter()
.zip(names)
.filter_map(|(kind, name)| {
if let GenericArgKind::Type(ty) = kind.unpack() {
let actual_type =
cx.tcx.normalize_erasing_regions(ParamEnv::reveal_all(), ty);
let actual_type_metadata =
type_metadata(cx, actual_type, rustc_span::DUMMY_SP);
let name = name.as_str();
Some(unsafe {
Some(llvm::LLVMRustDIBuilderCreateTemplateTypeParameter(
DIB(cx),
None,
name.as_ptr().cast(),
name.len(),
actual_type_metadata,
))
})
} else {
None
}
})
.collect()
} else {
vec![]
};
create_DIArray(DIB(cx), &template_params[..])
}
fn get_parameter_names(cx: &CodegenCx<'_, '_>, generics: &ty::Generics) -> Vec<Symbol> {
let mut names = generics
.parent
.map_or(vec![], |def_id| get_parameter_names(cx, cx.tcx.generics_of(def_id)));
names.extend(generics.params.iter().map(|param| param.name));
names
}
fn get_containing_scope<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
instance: Instance<'tcx>,
) -> &'ll DIScope {
// First, let's see if this is a method within an inherent impl. Because
// if yes, we want to make the result subroutine DIE a child of the
// subroutine's self-type.
let self_type = cx.tcx.impl_of_method(instance.def_id()).and_then(|impl_def_id| {
// If the method does *not* belong to a trait, proceed
if cx.tcx.trait_id_of_impl(impl_def_id).is_none() {
let impl_self_ty = cx.tcx.subst_and_normalize_erasing_regions(
instance.substs,
ty::ParamEnv::reveal_all(),
&cx.tcx.type_of(impl_def_id),
);
// Only "class" methods are generally understood by LLVM,
// so avoid methods on other types (e.g., `<*mut T>::null`).
match impl_self_ty.kind() {
ty::Adt(def, ..) if !def.is_box() => {
// Again, only create type information if full debuginfo is enabled
if cx.sess().opts.debuginfo == DebugInfo::Full
&& !impl_self_ty.needs_subst()
{
Some(type_metadata(cx, impl_self_ty, rustc_span::DUMMY_SP))
} else {
Some(namespace::item_namespace(cx, def.did))
}
}
_ => None,
}
} else {
// For trait method impls we still use the "parallel namespace"
// strategy
None
}
});
self_type.unwrap_or_else(|| {
namespace::item_namespace(
cx,
DefId {
krate: instance.def_id().krate,
index: cx
.tcx
.def_key(instance.def_id())
.parent
.expect("get_containing_scope: missing parent?"),
},
)
})
}*/
}
fn dbg_loc(&self, _scope: Self::DIScope, _inlined_at: Option<Self::DILocation>, _span: Span) -> Self::DILocation {
unimplemented!();
/*let DebugLoc { line, col, .. } = self.lookup_debug_loc(span.lo());
unsafe {
llvm::LLVMRustDIBuilderCreateDebugLocation(
utils::debug_context(self).llcontext,
line.unwrap_or(UNKNOWN_LINE_NUMBER),
col.unwrap_or(UNKNOWN_COLUMN_NUMBER),
scope,
inlined_at,
)
}*/
}
}

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use gccjit::{Function, FunctionType, GlobalKind, LValue, RValue, Type};
use rustc_codegen_ssa::traits::BaseTypeMethods;
use rustc_middle::ty::Ty;
use rustc_span::Symbol;
use rustc_target::abi::call::FnAbi;
use crate::abi::FnAbiGccExt;
use crate::context::{CodegenCx, unit_name};
use crate::intrinsic::llvm;
use crate::mangled_std_symbols::{ARGV_INIT_ARRAY, ARGV_INIT_WRAPPER};
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn get_or_insert_global(&self, name: &str, ty: Type<'gcc>, is_tls: bool, link_section: Option<Symbol>) -> RValue<'gcc> {
if self.globals.borrow().contains_key(name) {
let typ = self.globals.borrow().get(name).expect("global").get_type();
let global = self.context.new_global(None, GlobalKind::Imported, typ, name);
if is_tls {
global.set_tls_model(self.tls_model);
}
if let Some(link_section) = link_section {
global.set_link_section(&link_section.as_str());
}
global.get_address(None)
}
else {
self.declare_global(name, ty, is_tls, link_section)
}
}
pub fn declare_unnamed_global(&self, ty: Type<'gcc>) -> LValue<'gcc> {
let index = self.global_gen_sym_counter.get();
self.global_gen_sym_counter.set(index + 1);
let name = format!("global_{}_{}", index, unit_name(&self.codegen_unit));
self.context.new_global(None, GlobalKind::Exported, ty, &name)
}
pub fn declare_global_with_linkage(&self, name: &str, ty: Type<'gcc>, linkage: GlobalKind) -> RValue<'gcc> {
//debug!("declare_global_with_linkage(name={:?})", name);
let global = self.context.new_global(None, linkage, ty, name)
.get_address(None);
self.globals.borrow_mut().insert(name.to_string(), global);
// NOTE: global seems to only be global in a module. So save the name instead of the value
// to import it later.
self.global_names.borrow_mut().insert(global, name.to_string());
global
}
pub fn declare_func(&self, name: &str, return_type: Type<'gcc>, params: &[Type<'gcc>], variadic: bool) -> RValue<'gcc> {
self.linkage.set(FunctionType::Exported);
let func = declare_raw_fn(self, name, () /*llvm::CCallConv*/, return_type, params, variadic);
// FIXME: this is a wrong cast. That requires changing the compiler API.
unsafe { std::mem::transmute(func) }
}
pub fn declare_global(&self, name: &str, ty: Type<'gcc>, is_tls: bool, link_section: Option<Symbol>) -> RValue<'gcc> {
//debug!("declare_global(name={:?})", name);
// FIXME: correctly support global variable initialization.
if name.starts_with(ARGV_INIT_ARRAY) {
// NOTE: hack to avoid having to update the names in mangled_std_symbols: we save the
// name of the variable now to actually declare it later.
*self.init_argv_var.borrow_mut() = name.to_string();
let global = self.context.new_global(None, GlobalKind::Imported, ty, name);
if let Some(link_section) = link_section {
global.set_link_section(&link_section.as_str());
}
return global.get_address(None);
}
let global = self.context.new_global(None, GlobalKind::Exported, ty, name);
if is_tls {
global.set_tls_model(self.tls_model);
}
if let Some(link_section) = link_section {
global.set_link_section(&link_section.as_str());
}
let global = global.get_address(None);
self.globals.borrow_mut().insert(name.to_string(), global);
// NOTE: global seems to only be global in a module. So save the name instead of the value
// to import it later.
self.global_names.borrow_mut().insert(global, name.to_string());
global
}
pub fn declare_cfn(&self, name: &str, _fn_type: Type<'gcc>) -> RValue<'gcc> {
// TODO: use the fn_type parameter.
let const_string = self.context.new_type::<u8>().make_pointer().make_pointer();
let return_type = self.type_i32();
let variadic = false;
self.linkage.set(FunctionType::Exported);
let func = declare_raw_fn(self, name, () /*llvm::CCallConv*/, return_type, &[self.type_i32(), const_string], variadic);
// NOTE: it is needed to set the current_func here as well, because get_fn() is not called
// for the main function.
*self.current_func.borrow_mut() = Some(func);
// FIXME: this is a wrong cast. That requires changing the compiler API.
unsafe { std::mem::transmute(func) }
}
pub fn declare_fn(&self, name: &str, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> RValue<'gcc> {
// NOTE: hack to avoid having to update the names in mangled_std_symbols: we found the name
// of the variable earlier, so we declare it now.
// Since we don't correctly support initializers yet, we initialize this variable manually
// for now.
if name.starts_with(ARGV_INIT_WRAPPER) && !self.argv_initialized.get() {
let global_name = &*self.init_argv_var.borrow();
let return_type = self.type_void();
let params = [
self.context.new_parameter(None, self.int_type, "argc"),
self.context.new_parameter(None, self.u8_type.make_pointer().make_pointer(), "argv"),
self.context.new_parameter(None, self.u8_type.make_pointer().make_pointer(), "envp"),
];
let function = self.context.new_function(None, FunctionType::Extern, return_type, &params, name, false);
let initializer = function.get_address(None);
let param_types = [
self.int_type,
self.u8_type.make_pointer().make_pointer(),
self.u8_type.make_pointer().make_pointer(),
];
let ty = self.context.new_function_pointer_type(None, return_type, &param_types, false);
let global = self.context.new_global(None, GlobalKind::Exported, ty, global_name);
global.set_link_section(".init_array.00099");
global.global_set_initializer_value(initializer);
let global = global.get_address(None);
self.globals.borrow_mut().insert(global_name.to_string(), global);
// NOTE: global seems to only be global in a module. So save the name instead of the value
// to import it later.
self.global_names.borrow_mut().insert(global, global_name.to_string());
self.argv_initialized.set(true);
}
//debug!("declare_rust_fn(name={:?}, fn_abi={:?})", name, fn_abi);
let (return_type, params, variadic) = fn_abi.gcc_type(self);
let func = declare_raw_fn(self, name, () /*fn_abi.llvm_cconv()*/, return_type, &params, variadic);
//fn_abi.apply_attrs_llfn(self, func);
// FIXME: this is a wrong cast. That requires changing the compiler API.
unsafe { std::mem::transmute(func) }
}
pub fn define_global(&self, name: &str, ty: Type<'gcc>, is_tls: bool, link_section: Option<Symbol>) -> Option<RValue<'gcc>> {
Some(self.get_or_insert_global(name, ty, is_tls, link_section))
}
pub fn define_private_global(&self, ty: Type<'gcc>) -> RValue<'gcc> {
let global = self.declare_unnamed_global(ty);
global.get_address(None)
}
pub fn get_declared_value(&self, name: &str) -> Option<RValue<'gcc>> {
//debug!("get_declared_value(name={:?})", name);
// TODO: use a different field than globals, because this seems to return a function?
self.globals.borrow().get(name).cloned()
}
/*fn get_defined_value(&self, name: &str) -> Option<RValue<'gcc>> {
// TODO: gcc does not allow global initialization.
None
/*self.get_declared_value(name).and_then(|val| {
let declaration = unsafe { llvm::LLVMIsDeclaration(val) != 0 };
if !declaration { Some(val) } else { None }
})*/
}*/
}
/// Declare a function.
///
/// If there’s a value with the same name already declared, the function will
/// update the declaration and return existing Value instead.
fn declare_raw_fn<'gcc>(cx: &CodegenCx<'gcc, '_>, name: &str, _callconv: () /*llvm::CallConv*/, return_type: Type<'gcc>, param_types: &[Type<'gcc>], variadic: bool) -> Function<'gcc> {
//debug!("declare_raw_fn(name={:?}, ty={:?})", name, ty);
/*let llfn = unsafe {
llvm::LLVMRustGetOrInsertFunction(cx.llmod, name.as_ptr().cast(), name.len(), ty)
};*/
if name.starts_with("llvm.") {
return llvm::intrinsic(name, cx);
}
let func =
if cx.functions.borrow().contains_key(name) {
*cx.functions.borrow().get(name).expect("function")
}
else {
let params: Vec<_> = param_types.into_iter().enumerate()
.map(|(index, param)| cx.context.new_parameter(None, *param, &format!("param{}", index))) // TODO: set name.
.collect();
let func = cx.context.new_function(None, cx.linkage.get(), return_type, &params, mangle_name(name), variadic);
cx.functions.borrow_mut().insert(name.to_string(), func);
func
};
//llvm::SetFunctionCallConv(llfn, callconv); // TODO
// Function addresses in Rust are never significant, allowing functions to
// be merged.
//llvm::SetUnnamedAddress(llfn, llvm::UnnamedAddr::Global); // TODO
/*if cx.tcx.sess.opts.cg.no_redzone.unwrap_or(cx.tcx.sess.target.target.options.disable_redzone) {
llvm::Attribute::NoRedZone.apply_llfn(Function, llfn);
}*/
//attributes::default_optimisation_attrs(cx.tcx.sess, llfn);
//attributes::non_lazy_bind(cx.sess(), llfn);
// FIXME: invalid cast.
// TODO: is this line useful?
//cx.globals.borrow_mut().insert(name.to_string(), unsafe { std::mem::transmute(func) });
func
}
// FIXME: this is a hack because libgccjit currently only supports alpha, num and _.
// Unsupported characters: `$` and `.`.
pub fn mangle_name(name: &str) -> String {
name.replace(|char: char| {
if !char.is_alphanumeric() && char != '_' {
debug_assert!("$.".contains(char), "Unsupported char in function name: {}", char);
true
}
else {
false
}
}, "_")
}

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compiler/rustc_codegen_gcc/src/intrinsic/llvm.rs Normal file
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use gccjit::Function;
use crate::context::CodegenCx;
pub fn intrinsic<'gcc, 'tcx>(name: &str, cx: &CodegenCx<'gcc, 'tcx>) -> Function<'gcc> {
let _gcc_name =
match name {
"llvm.x86.xgetbv" => {
let gcc_name = "__builtin_trap";
let func = cx.context.get_builtin_function(gcc_name);
cx.functions.borrow_mut().insert(gcc_name.to_string(), func);
return func;
},
// TODO: this doc specifies the equivalent GCC builtins: http://huonw.github.io/llvmint/llvmint/x86/index.html
"llvm.x86.sse2.cmp.pd" => "__builtin_ia32_cmppd",
"llvm.x86.sse2.movmsk.pd" => "__builtin_ia32_movmskpd",
"llvm.x86.sse2.pmovmskb.128" => "__builtin_ia32_pmovmskb128",
_ => unimplemented!("unsupported LLVM intrinsic {}", name)
};
println!("Get target builtin");
unimplemented!();
/*let func = cx.context.get_target_builtin_function(gcc_name);
cx.functions.borrow_mut().insert(gcc_name.to_string(), func);
func*/
}

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compiler/rustc_codegen_gcc/src/intrinsic/mod.rs Normal file
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compiler/rustc_codegen_gcc/src/lib.rs Normal file
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/*
* TODO: support #[inline] attributes.
* TODO: support LTO.
*
* TODO: remove the local gccjit LD_LIBRARY_PATH in config.sh.
* TODO: remove the object dependency.
* TODO: remove the patches.
*/
#![feature(rustc_private, decl_macro, associated_type_bounds, never_type, trusted_len)]
#![allow(broken_intra_doc_links)]
#![recursion_limit="256"]
#![warn(rust_2018_idioms)]
#![warn(unused_lifetimes)]
/*extern crate flate2;
extern crate libc;*/
extern crate rustc_ast;
extern crate rustc_codegen_ssa;
extern crate rustc_data_structures;
extern crate rustc_errors;
//extern crate rustc_fs_util;
extern crate rustc_hir;
extern crate rustc_metadata;
extern crate rustc_middle;
extern crate rustc_mir;
extern crate rustc_session;
extern crate rustc_span;
extern crate rustc_symbol_mangling;
extern crate rustc_target;
extern crate snap;
// This prevents duplicating functions and statics that are already part of the host rustc process.
#[allow(unused_extern_crates)]
extern crate rustc_driver;
mod abi;
mod allocator;
mod archive;
mod asm;
mod back;
mod base;
mod builder;
mod callee;
mod common;
mod consts;
mod context;
mod coverageinfo;
mod debuginfo;
mod declare;
mod intrinsic;
mod mangled_std_symbols;
mod mono_item;
mod type_;
mod type_of;
mod va_arg;
use std::any::Any;
use std::sync::Arc;
use gccjit::{Block, Context, FunctionType, OptimizationLevel};
use rustc_ast::expand::allocator::AllocatorKind;
use rustc_codegen_ssa::{CodegenResults, CompiledModule, ModuleCodegen};
use rustc_codegen_ssa::base::codegen_crate;
use rustc_codegen_ssa::back::write::{CodegenContext, FatLTOInput, ModuleConfig, TargetMachineFactoryFn};
use rustc_codegen_ssa::back::lto::{LtoModuleCodegen, SerializedModule, ThinModule};
use rustc_codegen_ssa::target_features::supported_target_features;
use rustc_codegen_ssa::traits::{CodegenBackend, ExtraBackendMethods, ModuleBufferMethods, ThinBufferMethods, WriteBackendMethods};
use rustc_data_structures::fx::FxHashMap;
use rustc_errors::{ErrorReported, Handler};
use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
use rustc_middle::middle::cstore::EncodedMetadata;
use rustc_middle::ty::TyCtxt;
use rustc_session::config::{CrateType, Lto, OptLevel, OutputFilenames};
use rustc_session::Session;
use rustc_span::Symbol;
use rustc_span::fatal_error::FatalError;
use crate::context::unit_name;
pub struct PrintOnPanic<F: Fn() -> String>(pub F);
impl<F: Fn() -> String> Drop for PrintOnPanic<F> {
fn drop(&mut self) {
if ::std::thread::panicking() {
println!("{}", (self.0)());
}
}
}
#[derive(Clone)]
pub struct GccCodegenBackend;
impl CodegenBackend for GccCodegenBackend {
fn init(&self, sess: &Session) {
if sess.lto() != Lto::No {
sess.warn("LTO is not supported. You may get a linker error.");
}
}
fn codegen_crate<'tcx>(&self, tcx: TyCtxt<'tcx>, metadata: EncodedMetadata, need_metadata_module: bool) -> Box<dyn Any> {
let target_cpu = target_cpu(tcx.sess);
let res = codegen_crate(self.clone(), tcx, target_cpu.to_string(), metadata, need_metadata_module);
rustc_symbol_mangling::test::report_symbol_names(tcx);
Box::new(res)
}
fn join_codegen(&self, ongoing_codegen: Box<dyn Any>, sess: &Session) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorReported> {
let (codegen_results, work_products) = ongoing_codegen
.downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<GccCodegenBackend>>()
.expect("Expected GccCodegenBackend's OngoingCodegen, found Box<Any>")
.join(sess);
Ok((codegen_results, work_products))
}
fn link(&self, sess: &Session, mut codegen_results: CodegenResults, outputs: &OutputFilenames) -> Result<(), ErrorReported> {
use rustc_codegen_ssa::back::link::link_binary;
if let Some(symbols) = codegen_results.crate_info.exported_symbols.get_mut(&CrateType::Dylib) {
// TODO: remove when global initializer work without calling a function at runtime.
// HACK: since this codegen add some symbols (e.g. __gccGlobalCrateInit) and the UI
// tests load libstd.so as a dynamic library, and rustc use a version-script to specify
// the symbols visibility, we add * to export all symbols.
// It seems other symbols from libstd/libcore are causing some issues here as well.
symbols.push("*".to_string());
}
link_binary::<crate::archive::ArArchiveBuilder<'_>>(
sess,
&codegen_results,
outputs,
)
}
fn target_features(&self, sess: &Session) -> Vec<Symbol> {
target_features(sess)
}
}
impl ExtraBackendMethods for GccCodegenBackend {
fn new_metadata<'tcx>(&self, _tcx: TyCtxt<'tcx>, _mod_name: &str) -> Self::Module {
GccContext {
context: Context::default(),
}
}
fn write_compressed_metadata<'tcx>(&self, tcx: TyCtxt<'tcx>, metadata: &EncodedMetadata, gcc_module: &mut Self::Module) {
base::write_compressed_metadata(tcx, metadata, gcc_module)
}
fn codegen_allocator<'tcx>(&self, tcx: TyCtxt<'tcx>, mods: &mut Self::Module, kind: AllocatorKind, has_alloc_error_handler: bool) {
unsafe { allocator::codegen(tcx, mods, kind, has_alloc_error_handler) }
}
fn compile_codegen_unit<'tcx>(&self, tcx: TyCtxt<'tcx>, cgu_name: Symbol) -> (ModuleCodegen<Self::Module>, u64) {
base::compile_codegen_unit(tcx, cgu_name)
}
fn target_machine_factory(&self, _sess: &Session, _opt_level: OptLevel) -> TargetMachineFactoryFn<Self> {
// TODO: set opt level.
Arc::new(|_| {
Ok(())
})
}
fn target_cpu<'b>(&self, _sess: &'b Session) -> &'b str {
unimplemented!();
}
fn tune_cpu<'b>(&self, _sess: &'b Session) -> Option<&'b str> {
None
// TODO
//llvm_util::tune_cpu(sess)
}
}
pub struct ModuleBuffer;
impl ModuleBufferMethods for ModuleBuffer {
fn data(&self) -> &[u8] {
unimplemented!();
}
}
pub struct ThinBuffer;
impl ThinBufferMethods for ThinBuffer {
fn data(&self) -> &[u8] {
unimplemented!();
}
}
pub struct GccContext {
context: Context<'static>,
}
unsafe impl Send for GccContext {}
// FIXME: that shouldn't be Sync. Parallel compilation is currently disabled with "-Zno-parallel-llvm". Try to disable it here.
unsafe impl Sync for GccContext {}
impl WriteBackendMethods for GccCodegenBackend {
type Module = GccContext;
type TargetMachine = ();
type ModuleBuffer = ModuleBuffer;
type Context = ();
type ThinData = ();
type ThinBuffer = ThinBuffer;
fn run_fat_lto(_cgcx: &CodegenContext<Self>, mut modules: Vec<FatLTOInput<Self>>, _cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>) -> Result<LtoModuleCodegen<Self>, FatalError> {
// TODO: implement LTO by sending -flto to libgccjit and adding the appropriate gcc linker plugins.
// NOTE: implemented elsewhere.
let module =
match modules.remove(0) {
FatLTOInput::InMemory(module) => module,
FatLTOInput::Serialized { .. } => {
unimplemented!();
/*info!("pushing serialized module {:?}", name);
let buffer = SerializedModule::Local(buffer);
serialized_modules.push((buffer, CString::new(name).unwrap()));*/
}
};
Ok(LtoModuleCodegen::Fat { module: Some(module), _serialized_bitcode: vec![] })
}
fn run_thin_lto(_cgcx: &CodegenContext<Self>, _modules: Vec<(String, Self::ThinBuffer)>, _cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>) -> Result<(Vec<LtoModuleCodegen<Self>>, Vec<WorkProduct>), FatalError> {
unimplemented!();
}
fn print_pass_timings(&self) {
unimplemented!();
}
unsafe fn optimize(_cgcx: &CodegenContext<Self>, _diag_handler: &Handler, module: &ModuleCodegen<Self::Module>, config: &ModuleConfig) -> Result<(), FatalError> {
//if cgcx.lto == Lto::Fat {
//module.module_llvm.context.add_driver_option("-flto");
//}
module.module_llvm.context.set_optimization_level(to_gcc_opt_level(config.opt_level));
Ok(())
}
unsafe fn optimize_thin(_cgcx: &CodegenContext<Self>, _thin: &mut ThinModule<Self>) -> Result<ModuleCodegen<Self::Module>, FatalError> {
unimplemented!();
}
unsafe fn codegen(cgcx: &CodegenContext<Self>, diag_handler: &Handler, module: ModuleCodegen<Self::Module>, config: &ModuleConfig) -> Result<CompiledModule, FatalError> {
back::write::codegen(cgcx, diag_handler, module, config)
}
fn prepare_thin(_module: ModuleCodegen<Self::Module>) -> (String, Self::ThinBuffer) {
unimplemented!();
}
fn serialize_module(_module: ModuleCodegen<Self::Module>) -> (String, Self::ModuleBuffer) {
unimplemented!();
}
fn run_lto_pass_manager(_cgcx: &CodegenContext<Self>, _module: &ModuleCodegen<Self::Module>, _config: &ModuleConfig, _thin: bool) -> Result<(), FatalError> {
// TODO
Ok(())
}
fn run_link(cgcx: &CodegenContext<Self>, diag_handler: &Handler, modules: Vec<ModuleCodegen<Self::Module>>) -> Result<ModuleCodegen<Self::Module>, FatalError> {
back::write::link(cgcx, diag_handler, modules)
}
}
/*fn target_triple(sess: &Session) -> target_lexicon::Triple {
sess.target.llvm_target.parse().unwrap()
}*/
/// This is the entrypoint for a hot plugged rustc_codegen_gccjit
#[no_mangle]
pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
Box::new(GccCodegenBackend)
}
fn to_gcc_opt_level(optlevel: Option<OptLevel>) -> OptimizationLevel {
match optlevel {
None => OptimizationLevel::None,
Some(level) => {
match level {
OptLevel::No => OptimizationLevel::None,
OptLevel::Less => OptimizationLevel::Limited,
OptLevel::Default => OptimizationLevel::Standard,
OptLevel::Aggressive => OptimizationLevel::Aggressive,
OptLevel::Size | OptLevel::SizeMin => OptimizationLevel::Limited,
}
},
}
}
fn create_function_calling_initializers<'gcc, 'tcx>(tcx: TyCtxt<'tcx>, context: &Context<'gcc>, block: Block<'gcc>) {
let codegen_units = tcx.collect_and_partition_mono_items(()).1;
for codegen_unit in codegen_units {
let codegen_init_func = context.new_function(None, FunctionType::Extern, context.new_type::<()>(), &[],
&format!("__gccGlobalInit{}", unit_name(&codegen_unit)), false);
block.add_eval(None, context.new_call(None, codegen_init_func, &[]));
}
}
fn handle_native(name: &str) -> &str {
if name != "native" {
return name;
}
unimplemented!();
/*unsafe {
let mut len = 0;
let ptr = llvm::LLVMRustGetHostCPUName(&mut len);
str::from_utf8(slice::from_raw_parts(ptr as *const u8, len)).unwrap()
}*/
}
pub fn target_cpu(sess: &Session) -> &str {
let name = sess.opts.cg.target_cpu.as_ref().unwrap_or(&sess.target.cpu);
handle_native(name)
}
pub fn target_features(sess: &Session) -> Vec<Symbol> {
supported_target_features(sess)
.iter()
.filter_map(
|&(feature, gate)| {
if sess.is_nightly_build() || gate.is_none() { Some(feature) } else { None }
},
)
.filter(|_feature| {
/*if feature.starts_with("sse") {
return true;
}*/
// TODO: implement a way to get enabled feature in libgccjit.
//println!("Feature: {}", feature);
/*let llvm_feature = to_llvm_feature(sess, feature);
let cstr = CString::new(llvm_feature).unwrap();
unsafe { llvm::LLVMRustHasFeature(target_machine, cstr.as_ptr()) }*/
false
})
.map(|feature| Symbol::intern(feature))
.collect()
}

4
compiler/rustc_codegen_gcc/src/mangled_std_symbols.rs Normal file
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@ -0,0 +1,4 @@
pub const ARGV_INIT_ARRAY: &str = "_ZN3std3sys4unix4args3imp15ARGV_INIT_ARRAY";
pub const ARGV_INIT_WRAPPER: &str = "_ZN3std3sys4unix4args3imp15ARGV_INIT_ARRAY12init_wrapper";
pub const ARGC: &str = "_ZN3std3sys4unix4args3imp4ARGC";
pub const ARGV: &str = "_ZN3std3sys4unix4args3imp4ARGV";

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compiler/rustc_codegen_gcc/src/mono_item.rs Normal file
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use rustc_codegen_ssa::traits::PreDefineMethods;
use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
use rustc_middle::mir::mono::{Linkage, Visibility};
use rustc_middle::ty::{self, Instance, TypeFoldable};
use rustc_middle::ty::layout::FnAbiExt;
use rustc_span::def_id::DefId;
use rustc_target::abi::LayoutOf;
use rustc_target::abi::call::FnAbi;
use crate::base;
use crate::context::CodegenCx;
use crate::type_of::LayoutGccExt;
impl<'gcc, 'tcx> PreDefineMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn predefine_static(&self, def_id: DefId, _linkage: Linkage, _visibility: Visibility, symbol_name: &str) {
let attrs = self.tcx.codegen_fn_attrs(def_id);
let instance = Instance::mono(self.tcx, def_id);
let ty = instance.ty(self.tcx, ty::ParamEnv::reveal_all());
let gcc_type = self.layout_of(ty).gcc_type(self, true);
let is_tls = attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
let global = self.define_global(symbol_name, gcc_type, is_tls, attrs.link_section).unwrap_or_else(|| {
self.sess().span_fatal(
self.tcx.def_span(def_id),
&format!("symbol `{}` is already defined", symbol_name),
)
});
// TODO
/*unsafe {
llvm::LLVMRustSetLinkage(global, base::linkage_to_llvm(linkage));
llvm::LLVMRustSetVisibility(global, base::visibility_to_llvm(visibility));
}*/
self.instances.borrow_mut().insert(instance, global);
}
fn predefine_fn(&self, instance: Instance<'tcx>, linkage: Linkage, _visibility: Visibility, symbol_name: &str) {
assert!(!instance.substs.needs_infer() && !instance.substs.has_param_types_or_consts());
let fn_abi = FnAbi::of_instance(self, instance, &[]);
self.linkage.set(base::linkage_to_gcc(linkage));
let _decl = self.declare_fn(symbol_name, &fn_abi);
//let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
// TODO: call set_link_section() to allow initializing argc/argv.
//base::set_link_section(decl, &attrs);
/*if linkage == Linkage::LinkOnceODR || linkage == Linkage::WeakODR {
llvm::SetUniqueComdat(self.llmod, decl);
}*/
//debug!("predefine_fn: instance = {:?}", instance);
// TODO: use inline attribute from there in linkage.set() above:
//attributes::from_fn_attrs(self, decl, instance);
//self.instances.borrow_mut().insert(instance, decl);
}
}

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use std::convert::TryInto;
use gccjit::{RValue, Struct, Type};
use rustc_codegen_ssa::traits::{BaseTypeMethods, DerivedTypeMethods};
use rustc_codegen_ssa::common::TypeKind;
use rustc_middle::bug;
use rustc_middle::ty::layout::TyAndLayout;
use rustc_target::abi::{AddressSpace, Align, Integer, Size};
use crate::common::TypeReflection;
use crate::context::CodegenCx;
use crate::type_of::LayoutGccExt;
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn type_ix(&self, num_bits: u64) -> Type<'gcc> {
// gcc only supports 1, 2, 4 or 8-byte integers.
let bytes = (num_bits / 8).next_power_of_two() as i32;
match bytes {
1 => self.i8_type,
2 => self.i16_type,
4 => self.i32_type,
8 => self.i64_type,
16 => self.i128_type,
_ => panic!("unexpected num_bits: {}", num_bits),
}
/*
let bytes = (num_bits / 8).next_power_of_two() as i32;
println!("num_bits: {}, bytes: {}", num_bits, bytes);
self.context.new_int_type(bytes, true) // TODO: check if it is indeed a signed integer.
*/
}
/*pub fn type_bool(&self) -> Type<'gcc> {
self.bool_type
}*/
pub fn type_void(&self) -> Type<'gcc> {
self.context.new_type::<()>()
}
pub fn type_size_t(&self) -> Type<'gcc> {
self.context.new_type::<usize>()
}
pub fn type_u8(&self) -> Type<'gcc> {
self.u8_type
}
pub fn type_u16(&self) -> Type<'gcc> {
self.u16_type
}
pub fn type_u32(&self) -> Type<'gcc> {
self.u32_type
}
pub fn type_u64(&self) -> Type<'gcc> {
self.u64_type
}
pub fn type_u128(&self) -> Type<'gcc> {
self.u128_type
}
pub fn type_pointee_for_align(&self, align: Align) -> Type<'gcc> {
// FIXME(eddyb) We could find a better approximation if ity.align < align.
let ity = Integer::approximate_align(self, align);
self.type_from_integer(ity)
}
/*pub fn type_int_from_ty(&self, t: ty::IntTy) -> Type<'gcc> {
match t {
ty::IntTy::Isize => self.type_isize(),
ty::IntTy::I8 => self.type_i8(),
ty::IntTy::I16 => self.type_i16(),
ty::IntTy::I32 => self.type_i32(),
ty::IntTy::I64 => self.type_i64(),
ty::IntTy::I128 => self.type_i128(),
}
}
pub fn type_uint_from_ty(&self, t: ty::UintTy) -> Type<'gcc> {
match t {
ty::UintTy::Usize => self.type_isize(),
ty::UintTy::U8 => self.type_i8(),
ty::UintTy::U16 => self.type_i16(),
ty::UintTy::U32 => self.type_i32(),
ty::UintTy::U64 => self.type_i64(),
ty::UintTy::U128 => self.type_i128(),
}
}
pub fn type_float_from_ty(&self, t: ty::FloatTy) -> Type<'gcc> {
match t {
ty::FloatTy::F32 => self.type_f32(),
ty::FloatTy::F64 => self.type_f64(),
}
}
pub fn type_vector(&self, ty: Type<'gcc>, len: u64) -> Type<'gcc> {
self.context.new_vector_type(ty, len)
}*/
}
impl<'gcc, 'tcx> BaseTypeMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn type_i1(&self) -> Type<'gcc> {
self.bool_type
}
fn type_i8(&self) -> Type<'gcc> {
self.i8_type
}
fn type_i16(&self) -> Type<'gcc> {
self.i16_type
}
fn type_i32(&self) -> Type<'gcc> {
self.i32_type
}
fn type_i64(&self) -> Type<'gcc> {
self.i64_type
}
fn type_i128(&self) -> Type<'gcc> {
self.i128_type
}
fn type_isize(&self) -> Type<'gcc> {
self.isize_type
}
fn type_f32(&self) -> Type<'gcc> {
self.context.new_type::<f32>()
}
fn type_f64(&self) -> Type<'gcc> {
self.context.new_type::<f64>()
}
fn type_func(&self, params: &[Type<'gcc>], return_type: Type<'gcc>) -> Type<'gcc> {
self.context.new_function_pointer_type(None, return_type, params, false)
}
fn type_struct(&self, fields: &[Type<'gcc>], _packed: bool) -> Type<'gcc> {
let types = fields.to_vec();
if let Some(typ) = self.struct_types.borrow().get(fields) {
return typ.clone();
}
let fields: Vec<_> = fields.iter().enumerate()
.map(|(index, field)| self.context.new_field(None, *field, &format!("field{}_TODO", index)))
.collect();
// TODO: use packed.
//let name = types.iter().map(|typ| format!("{:?}", typ)).collect::<Vec<_>>().join("_");
//let typ = self.context.new_struct_type(None, format!("struct{}", name), &fields).as_type();
let typ = self.context.new_struct_type(None, "struct", &fields).as_type();
self.struct_types.borrow_mut().insert(types, typ);
typ
}
fn type_kind(&self, typ: Type<'gcc>) -> TypeKind {
if typ.is_integral() {
TypeKind::Integer
}
else if typ.is_vector().is_some() {
TypeKind::Vector
}
else {
// TODO
TypeKind::Void
}
}
fn type_ptr_to(&self, ty: Type<'gcc>) -> Type<'gcc> {
// TODO
/*assert_ne!(self.type_kind(ty), TypeKind::Function,
"don't call ptr_to on function types, use ptr_to_gcc_type on FnAbi instead"
);*/
ty.make_pointer()
}
fn type_ptr_to_ext(&self, ty: Type<'gcc>, _address_space: AddressSpace) -> Type<'gcc> {
// TODO: use address_space
ty.make_pointer()
}
fn element_type(&self, ty: Type<'gcc>) -> Type<'gcc> {
if let Some(typ) = ty.is_array() {
typ
}
else if let Some(vector_type) = ty.is_vector() {
vector_type.get_element_type()
}
else if let Some(typ) = ty.get_pointee() {
typ
}
else {
unreachable!()
}
}
fn vector_length(&self, _ty: Type<'gcc>) -> usize {
unimplemented!();
//unsafe { llvm::LLVMGetVectorSize(ty) as usize }
}
fn float_width(&self, typ: Type<'gcc>) -> usize {
let f32 = self.context.new_type::<f32>();
let f64 = self.context.new_type::<f64>();
if typ == f32 {
32
}
else if typ == f64 {
64
}
else {
panic!("Cannot get width of float type {:?}", typ);
}
// TODO: support other sizes.
/*match self.type_kind(ty) {
TypeKind::Float => 32,
TypeKind::Double => 64,
TypeKind::X86_FP80 => 80,
TypeKind::FP128 | TypeKind::PPC_FP128 => 128,
_ => bug!("llvm_float_width called on a non-float type"),
}*/
}
fn int_width(&self, typ: Type<'gcc>) -> u64 {
if typ.is_i8(self) || typ.is_u8(self) {
8
}
else if typ.is_i16(self) || typ.is_u16(self) {
16
}
else if typ.is_i32(self) || typ.is_u32(self) {
32
}
else if typ.is_i64(self) || typ.is_u64(self) {
64
}
else if typ.is_i128(self) || typ.is_u128(self) {
128
}
else {
panic!("Cannot get width of int type {:?}", typ);
}
}
fn val_ty(&self, value: RValue<'gcc>) -> Type<'gcc> {
value.get_type()
}
}
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
pub fn type_padding_filler(&self, size: Size, align: Align) -> Type<'gcc> {
let unit = Integer::approximate_align(self, align);
let size = size.bytes();
let unit_size = unit.size().bytes();
assert_eq!(size % unit_size, 0);
self.type_array(self.type_from_integer(unit), size / unit_size)
}
pub fn set_struct_body(&self, typ: Struct<'gcc>, fields: &[Type<'gcc>], _packed: bool) {
// TODO: use packed.
let fields: Vec<_> = fields.iter().enumerate()
.map(|(index, field)| self.context.new_field(None, *field, &format!("field_{}", index)))
.collect();
typ.set_fields(None, &fields);
}
/*fn type_struct(&self, fields: &[Type<'gcc>], packed: bool) -> Type<'gcc> {
// TODO: use packed.
let fields: Vec<_> = fields.iter().enumerate()
.map(|(index, field)| self.context.new_field(None, *field, &format!("field_{}", index)))
.collect();
return self.context.new_struct_type(None, "unnamedStruct", &fields).as_type();
}*/
pub fn type_named_struct(&self, name: &str) -> Struct<'gcc> {
self.context.new_opaque_struct_type(None, name)
}
pub fn type_array(&self, ty: Type<'gcc>, mut len: u64) -> Type<'gcc> {
if let Some(struct_type) = ty.is_struct() {
if struct_type.get_field_count() == 0 {
// NOTE: since gccjit only supports i32 for the array size and libcore's tests uses a
// size of usize::MAX in test_binary_search, we workaround this by setting the size to
// zero for ZSTs.
// FIXME: fix gccjit API.
len = 0;
}
}
let len: i32 = len.try_into().expect("array len");
self.context.new_array_type(None, ty, len)
}
}
pub fn struct_fields<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, layout: TyAndLayout<'tcx>) -> (Vec<Type<'gcc>>, bool) {
//debug!("struct_fields: {:#?}", layout);
let field_count = layout.fields.count();
let mut packed = false;
let mut offset = Size::ZERO;
let mut prev_effective_align = layout.align.abi;
let mut result: Vec<_> = Vec::with_capacity(1 + field_count * 2);
for i in layout.fields.index_by_increasing_offset() {
let target_offset = layout.fields.offset(i as usize);
let field = layout.field(cx, i);
let effective_field_align =
layout.align.abi.min(field.align.abi).restrict_for_offset(target_offset);
packed |= effective_field_align < field.align.abi;
/*debug!(
"struct_fields: {}: {:?} offset: {:?} target_offset: {:?} \
effective_field_align: {}",
i,
field,
offset,
target_offset,
effective_field_align.bytes()
);*/
assert!(target_offset >= offset);
let padding = target_offset - offset;
let padding_align = prev_effective_align.min(effective_field_align);
assert_eq!(offset.align_to(padding_align) + padding, target_offset);
result.push(cx.type_padding_filler(padding, padding_align));
//debug!(" padding before: {:?}", padding);
result.push(field.gcc_type(cx, !field.ty.is_any_ptr())); // FIXME: might need to check if the type is inside another, like Box<Type>.
offset = target_offset + field.size;
prev_effective_align = effective_field_align;
}
if !layout.is_unsized() && field_count > 0 {
if offset > layout.size {
bug!("layout: {:#?} stride: {:?} offset: {:?}", layout, layout.size, offset);
}
let padding = layout.size - offset;
let padding_align = prev_effective_align;
assert_eq!(offset.align_to(padding_align) + padding, layout.size);
/*debug!(
"struct_fields: pad_bytes: {:?} offset: {:?} stride: {:?}",
padding, offset, layout.size
);*/
result.push(cx.type_padding_filler(padding, padding_align));
assert_eq!(result.len(), 1 + field_count * 2);
} else {
//debug!("struct_fields: offset: {:?} stride: {:?}", offset, layout.size);
}
(result, packed)
}

366
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use std::fmt::Write;
use gccjit::{Struct, Type};
use crate::rustc_codegen_ssa::traits::{BaseTypeMethods, DerivedTypeMethods, LayoutTypeMethods};
use rustc_middle::bug;
use rustc_middle::ty::{self, Ty, TypeFoldable};
use rustc_middle::ty::layout::{FnAbiExt, TyAndLayout};
use rustc_middle::ty::print::with_no_trimmed_paths;
use rustc_target::abi::{self, Abi, F32, F64, FieldsShape, Int, Integer, LayoutOf, Pointer, PointeeInfo, Size, TyAndLayoutMethods, Variants};
use rustc_target::abi::call::{CastTarget, FnAbi, Reg};
use crate::abi::{FnAbiGccExt, GccType};
use crate::context::CodegenCx;
use crate::type_::struct_fields;
impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
fn type_from_unsigned_integer(&self, i: Integer) -> Type<'gcc> {
use Integer::*;
match i {
I8 => self.type_u8(),
I16 => self.type_u16(),
I32 => self.type_u32(),
I64 => self.type_u64(),
I128 => self.type_u128(),
}
}
}
pub fn uncached_gcc_type<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, layout: TyAndLayout<'tcx>, defer: &mut Option<(Struct<'gcc>, TyAndLayout<'tcx>)>) -> Type<'gcc> {
match layout.abi {
Abi::Scalar(_) => bug!("handled elsewhere"),
Abi::Vector { ref element, count } => {
let element = layout.scalar_gcc_type_at(cx, element, Size::ZERO);
return cx.context.new_vector_type(element, count);
},
Abi::ScalarPair(..) => {
return cx.type_struct(
&[
layout.scalar_pair_element_gcc_type(cx, 0, false),
layout.scalar_pair_element_gcc_type(cx, 1, false),
],
false,
);
}
Abi::Uninhabited | Abi::Aggregate { .. } => {}
}
let name = match layout.ty.kind() {
// FIXME(eddyb) producing readable type names for trait objects can result
// in problematically distinct types due to HRTB and subtyping (see #47638).
// ty::Dynamic(..) |
ty::Adt(..) | ty::Closure(..) | ty::Foreign(..) | ty::Generator(..) | ty::Str
if !cx.sess().fewer_names() =>
{
let mut name = with_no_trimmed_paths(|| layout.ty.to_string());
if let (&ty::Adt(def, _), &Variants::Single { index }) =
(layout.ty.kind(), &layout.variants)
{
if def.is_enum() && !def.variants.is_empty() {
write!(&mut name, "::{}", def.variants[index].ident).unwrap();
}
}
if let (&ty::Generator(_, _, _), &Variants::Single { index }) =
(layout.ty.kind(), &layout.variants)
{
write!(&mut name, "::{}", ty::GeneratorSubsts::variant_name(index)).unwrap();
}
Some(name)
}
ty::Adt(..) => {
// If `Some` is returned then a named struct is created in LLVM. Name collisions are
// avoided by LLVM (with increasing suffixes). If rustc doesn't generate names then that
// can improve perf.
// FIXME: I don't think that's true for libgccjit.
Some(String::new())
}
_ => None,
};
match layout.fields {
FieldsShape::Primitive | FieldsShape::Union(_) => {
let fill = cx.type_padding_filler(layout.size, layout.align.abi);
let packed = false;
match name {
None => cx.type_struct(&[fill], packed),
Some(ref name) => {
let gcc_type = cx.type_named_struct(name);
cx.set_struct_body(gcc_type, &[fill], packed);
gcc_type.as_type()
},
}
}
FieldsShape::Array { count, .. } => cx.type_array(layout.field(cx, 0).gcc_type(cx, true), count),
FieldsShape::Arbitrary { .. } =>
match name {
None => {
let (gcc_fields, packed) = struct_fields(cx, layout);
cx.type_struct(&gcc_fields, packed)
},
Some(ref name) => {
let gcc_type = cx.type_named_struct(name);
*defer = Some((gcc_type, layout));
gcc_type.as_type()
},
},
}
}
pub trait LayoutGccExt<'tcx> {
fn is_gcc_immediate(&self) -> bool;
fn is_gcc_scalar_pair(&self) -> bool;
fn gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, set_fields: bool) -> Type<'gcc>;
fn immediate_gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
fn scalar_gcc_type_at<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, scalar: &abi::Scalar, offset: Size) -> Type<'gcc>;
fn scalar_pair_element_gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, index: usize, immediate: bool) -> Type<'gcc>;
fn gcc_field_index(&self, index: usize) -> u64;
fn pointee_info_at<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, offset: Size) -> Option<PointeeInfo>;
}
impl<'tcx> LayoutGccExt<'tcx> for TyAndLayout<'tcx> {
fn is_gcc_immediate(&self) -> bool {
match self.abi {
Abi::Scalar(_) | Abi::Vector { .. } => true,
Abi::ScalarPair(..) => false,
Abi::Uninhabited | Abi::Aggregate { .. } => self.is_zst(),
}
}
fn is_gcc_scalar_pair(&self) -> bool {
match self.abi {
Abi::ScalarPair(..) => true,
Abi::Uninhabited | Abi::Scalar(_) | Abi::Vector { .. } | Abi::Aggregate { .. } => false,
}
}
/// Gets the GCC type corresponding to a Rust type, i.e., `rustc_middle::ty::Ty`.
/// The pointee type of the pointer in `PlaceRef` is always this type.
/// For sized types, it is also the right LLVM type for an `alloca`
/// containing a value of that type, and most immediates (except `bool`).
/// Unsized types, however, are represented by a "minimal unit", e.g.
/// `[T]` becomes `T`, while `str` and `Trait` turn into `i8` - this
/// is useful for indexing slices, as `&[T]`'s data pointer is `T*`.
/// If the type is an unsized struct, the regular layout is generated,
/// with the inner-most trailing unsized field using the "minimal unit"
/// of that field's type - this is useful for taking the address of
/// that field and ensuring the struct has the right alignment.
fn gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, set_fields: bool) -> Type<'gcc> {
if let Abi::Scalar(ref scalar) = self.abi {
// Use a different cache for scalars because pointers to DSTs
// can be either fat or thin (data pointers of fat pointers).
if let Some(&ty) = cx.scalar_types.borrow().get(&self.ty) {
return ty;
}
let ty =
match *self.ty.kind() {
ty::Ref(_, ty, _) | ty::RawPtr(ty::TypeAndMut { ty, .. }) => {
cx.type_ptr_to(cx.layout_of(ty).gcc_type(cx, set_fields))
}
ty::Adt(def, _) if def.is_box() => {
cx.type_ptr_to(cx.layout_of(self.ty.boxed_ty()).gcc_type(cx, true))
}
ty::FnPtr(sig) => cx.fn_ptr_backend_type(&FnAbi::of_fn_ptr(cx, sig, &[])),
_ => self.scalar_gcc_type_at(cx, scalar, Size::ZERO),
};
cx.scalar_types.borrow_mut().insert(self.ty, ty);
return ty;
}
// Check the cache.
let variant_index =
match self.variants {
Variants::Single { index } => Some(index),
_ => None,
};
let cached_type = cx.types.borrow().get(&(self.ty, variant_index)).cloned();
if let Some(ty) = cached_type {
let type_to_set_fields = cx.types_with_fields_to_set.borrow_mut().remove(&ty);
if let Some((struct_type, layout)) = type_to_set_fields {
// Since we might be trying to generate a type containing another type which is not
// completely generated yet, we deferred setting the fields until now.
let (fields, packed) = struct_fields(cx, layout);
cx.set_struct_body(struct_type, &fields, packed);
}
return ty;
}
//debug!("gcc_type({:#?})", self);
assert!(!self.ty.has_escaping_bound_vars(), "{:?} has escaping bound vars", self.ty);
// Make sure lifetimes are erased, to avoid generating distinct LLVM
// types for Rust types that only differ in the choice of lifetimes.
let normal_ty = cx.tcx.erase_regions(self.ty);
let mut defer = None;
let ty =
if self.ty != normal_ty {
let mut layout = cx.layout_of(normal_ty);
if let Some(v) = variant_index {
layout = layout.for_variant(cx, v);
}
layout.gcc_type(cx, true)
}
else {
uncached_gcc_type(cx, *self, &mut defer)
};
//debug!("--> mapped {:#?} to ty={:?}", self, ty);
cx.types.borrow_mut().insert((self.ty, variant_index), ty);
if let Some((ty, layout)) = defer {
//TODO: do we still need this conditions and the set_fields parameter?
//if set_fields {
let (fields, packed) = struct_fields(cx, layout);
cx.set_struct_body(ty, &fields, packed);
/*}
else {
// Since we might be trying to generate a type containing another type which is not
// completely generated yet, we don't set the fields right now, but we save the
// type to set the fields later.
cx.types_with_fields_to_set.borrow_mut().insert(ty.as_type(), (ty, layout));
}*/
}
ty
}
fn immediate_gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
if let Abi::Scalar(ref scalar) = self.abi {
if scalar.is_bool() {
return cx.type_i1();
}
}
self.gcc_type(cx, true)
}
fn scalar_gcc_type_at<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, scalar: &abi::Scalar, offset: Size) -> Type<'gcc> {
match scalar.value {
Int(i, true) => cx.type_from_integer(i),
Int(i, false) => cx.type_from_unsigned_integer(i),
F32 => cx.type_f32(),
F64 => cx.type_f64(),
Pointer => {
// If we know the alignment, pick something better than i8.
let pointee =
if let Some(pointee) = self.pointee_info_at(cx, offset) {
cx.type_pointee_for_align(pointee.align)
}
else {
cx.type_i8()
};
cx.type_ptr_to(pointee)
}
}
}
fn scalar_pair_element_gcc_type<'gcc>(&self, cx: &CodegenCx<'gcc, 'tcx>, index: usize, immediate: bool) -> Type<'gcc> {
// TODO: remove llvm hack:
// HACK(eddyb) special-case fat pointers until LLVM removes
// pointee types, to avoid bitcasting every `OperandRef::deref`.
match self.ty.kind() {
ty::Ref(..) | ty::RawPtr(_) => {
return self.field(cx, index).gcc_type(cx, true);
}
ty::Adt(def, _) if def.is_box() => {
let ptr_ty = cx.tcx.mk_mut_ptr(self.ty.boxed_ty());
return cx.layout_of(ptr_ty).scalar_pair_element_gcc_type(cx, index, immediate);
}
_ => {}
}
let (a, b) = match self.abi {
Abi::ScalarPair(ref a, ref b) => (a, b),
_ => bug!("TyAndLayout::scalar_pair_element_llty({:?}): not applicable", self),
};
let scalar = [a, b][index];
// Make sure to return the same type `immediate_gcc_type` would when
// dealing with an immediate pair. This means that `(bool, bool)` is
// effectively represented as `{i8, i8}` in memory and two `i1`s as an
// immediate, just like `bool` is typically `i8` in memory and only `i1`
// when immediate. We need to load/store `bool` as `i8` to avoid
// crippling LLVM optimizations or triggering other LLVM bugs with `i1`.
// TODO: this bugs certainly don't happen in this case since the bool type is used instead of i1.
if /*immediate &&*/ scalar.is_bool() {
return cx.type_i1();
}
let offset =
if index == 0 {
Size::ZERO
}
else {
a.value.size(cx).align_to(b.value.align(cx).abi)
};
self.scalar_gcc_type_at(cx, scalar, offset)
}
fn gcc_field_index(&self, index: usize) -> u64 {
match self.abi {
Abi::Scalar(_) | Abi::ScalarPair(..) => {
bug!("TyAndLayout::gcc_field_index({:?}): not applicable", self)
}
_ => {}
}
match self.fields {
FieldsShape::Primitive | FieldsShape::Union(_) => {
bug!("TyAndLayout::gcc_field_index({:?}): not applicable", self)
}
FieldsShape::Array { .. } => index as u64,
FieldsShape::Arbitrary { .. } => 1 + (self.fields.memory_index(index) as u64) * 2,
}
}
fn pointee_info_at<'a>(&self, cx: &CodegenCx<'a, 'tcx>, offset: Size) -> Option<PointeeInfo> {
if let Some(&pointee) = cx.pointee_infos.borrow().get(&(self.ty, offset)) {
return pointee;
}
let result = Ty::pointee_info_at(*self, cx, offset);
cx.pointee_infos.borrow_mut().insert((self.ty, offset), result);
result
}
}
impl<'gcc, 'tcx> LayoutTypeMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn backend_type(&self, layout: TyAndLayout<'tcx>) -> Type<'gcc> {
layout.gcc_type(self, true)
}
fn immediate_backend_type(&self, layout: TyAndLayout<'tcx>) -> Type<'gcc> {
layout.immediate_gcc_type(self)
}
fn is_backend_immediate(&self, layout: TyAndLayout<'tcx>) -> bool {
layout.is_gcc_immediate()
}
fn is_backend_scalar_pair(&self, layout: TyAndLayout<'tcx>) -> bool {
layout.is_gcc_scalar_pair()
}
fn backend_field_index(&self, layout: TyAndLayout<'tcx>, index: usize) -> u64 {
layout.gcc_field_index(index)
}
fn scalar_pair_element_backend_type(&self, layout: TyAndLayout<'tcx>, index: usize, immediate: bool) -> Type<'gcc> {
layout.scalar_pair_element_gcc_type(self, index, immediate)
}
fn cast_backend_type(&self, ty: &CastTarget) -> Type<'gcc> {
ty.gcc_type(self)
}
fn fn_ptr_backend_type(&self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> Type<'gcc> {
fn_abi.ptr_to_gcc_type(self)
}
fn reg_backend_type(&self, _ty: &Reg) -> Type<'gcc> {
unimplemented!();
//ty.gcc_type(self)
}
}

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/*use gccjit::{RValue, ToRValue, Type};
use rustc_codegen_ssa::mir::operand::OperandRef;
use rustc_codegen_ssa::{
common::IntPredicate,
traits::{BaseTypeMethods, BuilderMethods, ConstMethods, DerivedTypeMethods},
};
use rustc_middle::ty::layout::HasTyCtxt;
use rustc_middle::ty::Ty;
use rustc_target::abi::{Align, Endian, HasDataLayout, LayoutOf, Size};
use crate::builder::Builder;
use crate::type_of::LayoutGccExt;
fn round_pointer_up_to_alignment<'a, 'gcc, 'tcx>(bx: &mut Builder<'a, 'gcc, 'tcx>, addr: RValue<'gcc>, align: Align, ptr_ty: Type<'gcc>) -> RValue<'gcc> {
let mut ptr_as_int = bx.ptrtoint(addr, bx.cx().type_isize());
ptr_as_int = bx.add(ptr_as_int, bx.cx().const_i32(align.bytes() as i32 - 1));
ptr_as_int = bx.and(ptr_as_int, bx.cx().const_i32(-(align.bytes() as i32)));
bx.inttoptr(ptr_as_int, ptr_ty)
}
fn emit_direct_ptr_va_arg<'a, 'gcc, 'tcx>(bx: &mut Builder<'a, 'gcc, 'tcx>, list: OperandRef<'tcx, RValue<'gcc>>, llty: Type<'gcc>, size: Size, align: Align, slot_size: Align, allow_higher_align: bool) -> (RValue<'gcc>, Align) {
let va_list_ptr_ty = bx.cx().type_ptr_to(bx.cx.type_i8p());
let va_list_addr =
if list.layout.gcc_type(bx.cx, true) != va_list_ptr_ty {
bx.bitcast(list.immediate(), va_list_ptr_ty)
}
else {
list.immediate()
};
let ptr = bx.load(va_list_addr, bx.tcx().data_layout.pointer_align.abi);
let (addr, addr_align) = if allow_higher_align && align > slot_size {
(round_pointer_up_to_alignment(bx, ptr, align, bx.cx().type_i8p()), align)
} else {
(ptr, slot_size)
};
let aligned_size = size.align_to(slot_size).bytes() as i32;
let full_direct_size = bx.cx().const_i32(aligned_size);
let next = bx.inbounds_gep(addr, &[full_direct_size]);
bx.store(next, va_list_addr, bx.tcx().data_layout.pointer_align.abi);
if size.bytes() < slot_size.bytes() && bx.tcx().sess.target.endian == Endian::Big {
let adjusted_size = bx.cx().const_i32((slot_size.bytes() - size.bytes()) as i32);
let adjusted = bx.inbounds_gep(addr, &[adjusted_size]);
(bx.bitcast(adjusted, bx.cx().type_ptr_to(llty)), addr_align)
} else {
(bx.bitcast(addr, bx.cx().type_ptr_to(llty)), addr_align)
}
}
fn emit_ptr_va_arg<'a, 'gcc, 'tcx>(bx: &mut Builder<'a, 'gcc, 'tcx>, list: OperandRef<'tcx, RValue<'gcc>>, target_ty: Ty<'tcx>, indirect: bool, slot_size: Align, allow_higher_align: bool) -> RValue<'gcc> {
let layout = bx.cx.layout_of(target_ty);
let (llty, size, align) =
if indirect {
(
bx.cx.layout_of(bx.cx.tcx.mk_imm_ptr(target_ty)).gcc_type(bx.cx, true),
bx.cx.data_layout().pointer_size,
bx.cx.data_layout().pointer_align,
)
}
else {
(layout.gcc_type(bx.cx, true), layout.size, layout.align)
};
let (addr, addr_align) = emit_direct_ptr_va_arg(bx, list, llty, size, align.abi, slot_size, allow_higher_align);
if indirect {
let tmp_ret = bx.load(addr, addr_align);
bx.load(tmp_ret, align.abi)
}
else {
bx.load(addr, addr_align)
}
}
fn emit_aapcs_va_arg<'a, 'gcc, 'tcx>(bx: &mut Builder<'a, 'gcc, 'tcx>, list: OperandRef<'tcx, RValue<'gcc>>, target_ty: Ty<'tcx>) -> RValue<'gcc> {
// Implementation of the AAPCS64 calling convention for va_args see
// https://github.com/ARM-software/abi-aa/blob/master/aapcs64/aapcs64.rst
let va_list_addr = list.immediate();
let layout = bx.cx.layout_of(target_ty);
let gcc_type = layout.immediate_gcc_type(bx);
let function = bx.llbb().get_function();
let variable = function.new_local(None, gcc_type, "va_arg");
let mut maybe_reg = bx.build_sibling_block("va_arg.maybe_reg");
let mut in_reg = bx.build_sibling_block("va_arg.in_reg");
let mut on_stack = bx.build_sibling_block("va_arg.on_stack");
let end = bx.build_sibling_block("va_arg.end");
let zero = bx.const_i32(0);
let offset_align = Align::from_bytes(4).unwrap();
assert!(bx.tcx().sess.target.endian == Endian::Little);
let gr_type = target_ty.is_any_ptr() || target_ty.is_integral();
let (reg_off, reg_top_index, slot_size) = if gr_type {
let gr_offs = bx.struct_gep(va_list_addr, 7);
let nreg = (layout.size.bytes() + 7) / 8;
(gr_offs, 3, nreg * 8)
} else {
let vr_off = bx.struct_gep(va_list_addr, 9);
let nreg = (layout.size.bytes() + 15) / 16;
(vr_off, 5, nreg * 16)
};
// if the offset >= 0 then the value will be on the stack
let mut reg_off_v = bx.load(reg_off, offset_align);
let use_stack = bx.icmp(IntPredicate::IntSGE, reg_off_v, zero);
bx.cond_br(use_stack, on_stack.llbb(), maybe_reg.llbb());
// The value at this point might be in a register, but there is a chance that
// it could be on the stack so we have to update the offset and then check
// the offset again.
if gr_type && layout.align.abi.bytes() > 8 {
reg_off_v = maybe_reg.add(reg_off_v, bx.const_i32(15));
reg_off_v = maybe_reg.and(reg_off_v, bx.const_i32(-16));
}
let new_reg_off_v = maybe_reg.add(reg_off_v, bx.const_i32(slot_size as i32));
maybe_reg.store(new_reg_off_v, reg_off, offset_align);
// Check to see if we have overflowed the registers as a result of this.
// If we have then we need to use the stack for this value
let use_stack = maybe_reg.icmp(IntPredicate::IntSGT, new_reg_off_v, zero);
maybe_reg.cond_br(use_stack, on_stack.llbb(), in_reg.llbb());
let top = in_reg.struct_gep(va_list_addr, reg_top_index);
let top = in_reg.load(top, bx.tcx().data_layout.pointer_align.abi);
// reg_value = *(@top + reg_off_v);
let top = in_reg.gep(top, &[reg_off_v]);
let top = in_reg.bitcast(top, bx.cx.type_ptr_to(layout.gcc_type(bx, true)));
let reg_value = in_reg.load(top, layout.align.abi);
in_reg.assign(variable, reg_value);
in_reg.br(end.llbb());
// On Stack block
let stack_value =
emit_ptr_va_arg(&mut on_stack, list, target_ty, false, Align::from_bytes(8).unwrap(), true);
on_stack.assign(variable, stack_value);
on_stack.br(end.llbb());
*bx = end;
variable.to_rvalue()
}
pub(super) fn emit_va_arg<'a, 'gcc, 'tcx>(bx: &mut Builder<'a, 'gcc, 'tcx>, addr: OperandRef<'tcx, RValue<'gcc>>, target_ty: Ty<'tcx>) -> RValue<'gcc> {
// Determine the va_arg implementation to use. The LLVM va_arg instruction
// is lacking in some instances, so we should only use it as a fallback.
let target = &bx.cx.tcx.sess.target;
let arch = &bx.cx.tcx.sess.target.arch;
match &**arch {
// Windows x86
"x86" if target.options.is_like_windows => {
emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(4).unwrap(), false)
}
// Generic x86
"x86" => emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(4).unwrap(), true),
// Windows AArch64
"aarch64" if target.options.is_like_windows => {
emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(8).unwrap(), false)
}
// macOS / iOS AArch64
"aarch64" if target.options.is_like_osx => {
emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(8).unwrap(), true)
}
"aarch64" => emit_aapcs_va_arg(bx, addr, target_ty),
// Windows x86_64
"x86_64" if target.options.is_like_windows => {
let target_ty_size = bx.cx.size_of(target_ty).bytes();
let indirect: bool = target_ty_size > 8 || !target_ty_size.is_power_of_two();
emit_ptr_va_arg(bx, addr, target_ty, indirect, Align::from_bytes(8).unwrap(), false)
}
// For all other architecture/OS combinations fall back to using
// the LLVM va_arg instruction.
// https://llvm.org/docs/LangRef.html#va-arg-instruction
_ => bx.va_arg(addr.immediate(), bx.cx.layout_of(target_ty).gcc_type(bx.cx, true)),
}
}*/

197
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#!/bin/bash
# TODO: rewrite to cargo-make (or just) or something like that to only rebuild the sysroot when needed?
#set -x
set -e
export GCC_PATH=$(cat gcc_path)
export LD_LIBRARY_PATH="$GCC_PATH"
export LIBRARY_PATH="$GCC_PATH"
if [[ "$1" == "--release" ]]; then
export CHANNEL='release'
CARGO_INCREMENTAL=1 cargo rustc --release
else
echo $LD_LIBRARY_PATH
export CHANNEL='debug'
cargo rustc
fi
source config.sh
rm -r target/out || true
mkdir -p target/out/gccjit
echo "[BUILD] mini_core"
$RUSTC example/mini_core.rs --crate-name mini_core --crate-type lib,dylib --target $TARGET_TRIPLE
echo "[BUILD] example"
$RUSTC example/example.rs --crate-type lib --target $TARGET_TRIPLE
#if [[ "$HOST_TRIPLE" = "$TARGET_TRIPLE" ]]; then
#echo "[JIT] mini_core_hello_world"
#CG_CLIF_JIT=1 CG_CLIF_JIT_ARGS="abc bcd" $RUSTC --crate-type bin -Cprefer-dynamic example/mini_core_hello_world.rs --cfg jit --target $HOST_TRIPLE
#else
#echo "[JIT] mini_core_hello_world (skipped)"
#fi
echo "[AOT] mini_core_hello_world"
$RUSTC example/mini_core_hello_world.rs --crate-name mini_core_hello_world --crate-type bin -g --target $TARGET_TRIPLE
$RUN_WRAPPER ./target/out/mini_core_hello_world abc bcd
# (echo "break set -n main"; echo "run"; sleep 1; echo "si -c 10"; sleep 1; echo "frame variable") | lldb -- ./target/out/mini_core_hello_world abc bcd
echo "[BUILD] sysroot"
time ./build_sysroot/build_sysroot.sh
echo "[AOT] arbitrary_self_types_pointers_and_wrappers"
$RUSTC example/arbitrary_self_types_pointers_and_wrappers.rs --crate-name arbitrary_self_types_pointers_and_wrappers --crate-type bin --target $TARGET_TRIPLE
$RUN_WRAPPER ./target/out/arbitrary_self_types_pointers_and_wrappers
echo "[AOT] alloc_system"
$RUSTC example/alloc_system.rs --crate-type lib --target "$TARGET_TRIPLE"
# FIXME: this requires linking an additional lib for __popcountdi2
#echo "[AOT] alloc_example"
#$RUSTC example/alloc_example.rs --crate-type bin --target $TARGET_TRIPLE
#$RUN_WRAPPER ./target/out/alloc_example
#if [[ "$HOST_TRIPLE" = "$TARGET_TRIPLE" ]]; then
#echo "[JIT] std_example"
#CG_CLIF_JIT=1 $RUSTC --crate-type bin -Cprefer-dynamic example/std_example.rs --target $HOST_TRIPLE
#else
#echo "[JIT] std_example (skipped)"
#fi
echo "[AOT] dst_field_align"
# FIXME Re-add -Zmir-opt-level=2 once rust-lang/rust#67529 is fixed.
$RUSTC example/dst-field-align.rs --crate-name dst_field_align --crate-type bin --target $TARGET_TRIPLE
$RUN_WRAPPER ./target/out/dst_field_align || (echo $?; false)
echo "[AOT] std_example"
$RUSTC example/std_example.rs --crate-type bin --target $TARGET_TRIPLE
$RUN_WRAPPER ./target/out/std_example --target $TARGET_TRIPLE
echo "[AOT] subslice-patterns-const-eval"
$RUSTC example/subslice-patterns-const-eval.rs --crate-type bin -Cpanic=abort --target $TARGET_TRIPLE
$RUN_WRAPPER ./target/out/subslice-patterns-const-eval
echo "[AOT] track-caller-attribute"
$RUSTC example/track-caller-attribute.rs --crate-type bin -Cpanic=abort --target $TARGET_TRIPLE
$RUN_WRAPPER ./target/out/track-caller-attribute
# FIXME: this requires linking an additional lib for __popcountdi2
#echo "[BUILD] mod_bench"
#$RUSTC example/mod_bench.rs --crate-type bin --target $TARGET_TRIPLE
# FIXME linker gives multiple definitions error on Linux
#echo "[BUILD] sysroot in release mode"
#./build_sysroot/build_sysroot.sh --release
#pushd simple-raytracer
#if [[ "$HOST_TRIPLE" = "$TARGET_TRIPLE" ]]; then
#echo "[BENCH COMPILE] ebobby/simple-raytracer"
#hyperfine --runs ${RUN_RUNS:-10} --warmup 1 --prepare "rm -r target/*/debug || true" \
#"RUSTFLAGS='' cargo build --target $TARGET_TRIPLE" \
#"../cargo.sh build"
#echo "[BENCH RUN] ebobby/simple-raytracer"
#cp ./target/*/debug/main ./raytracer_cg_gccjit
#hyperfine --runs ${RUN_RUNS:-10} ./raytracer_cg_llvm ./raytracer_cg_gccjit
#else
#echo "[BENCH COMPILE] ebobby/simple-raytracer (skipped)"
#echo "[COMPILE] ebobby/simple-raytracer"
#../cargo.sh build
#echo "[BENCH RUN] ebobby/simple-raytracer (skipped)"
#fi
#popd
pushd build_sysroot/sysroot_src/library/core/tests
echo "[TEST] libcore"
rm -r ./target || true
../../../../../cargo.sh test
popd
#pushd regex
#echo "[TEST] rust-lang/regex example shootout-regex-dna"
#../cargo.sh clean
## Make sure `[codegen mono items] start` doesn't poison the diff
#../cargo.sh build --example shootout-regex-dna
#cat examples/regexdna-input.txt | ../cargo.sh run --example shootout-regex-dna | grep -v "Spawned thread" > res.txt
#diff -u res.txt examples/regexdna-output.txt
#echo "[TEST] rust-lang/regex tests"
#../cargo.sh test --tests -- --exclude-should-panic --test-threads 1 -Zunstable-options
#popd
#echo
#echo "[BENCH COMPILE] mod_bench"
#COMPILE_MOD_BENCH_INLINE="$RUSTC example/mod_bench.rs --crate-type bin -Zmir-opt-level=3 -O --crate-name mod_bench_inline"
#COMPILE_MOD_BENCH_LLVM_0="rustc example/mod_bench.rs --crate-type bin -Copt-level=0 -o target/out/mod_bench_llvm_0 -Cpanic=abort"
#COMPILE_MOD_BENCH_LLVM_1="rustc example/mod_bench.rs --crate-type bin -Copt-level=1 -o target/out/mod_bench_llvm_1 -Cpanic=abort"
#COMPILE_MOD_BENCH_LLVM_2="rustc example/mod_bench.rs --crate-type bin -Copt-level=2 -o target/out/mod_bench_llvm_2 -Cpanic=abort"
#COMPILE_MOD_BENCH_LLVM_3="rustc example/mod_bench.rs --crate-type bin -Copt-level=3 -o target/out/mod_bench_llvm_3 -Cpanic=abort"
## Use 100 runs, because a single compilations doesn't take more than ~150ms, so it isn't very slow
#hyperfine --runs ${COMPILE_RUNS:-100} "$COMPILE_MOD_BENCH_INLINE" "$COMPILE_MOD_BENCH_LLVM_0" "$COMPILE_MOD_BENCH_LLVM_1" "$COMPILE_MOD_BENCH_LLVM_2" "$COMPILE_MOD_BENCH_LLVM_3"
#echo
#echo "[BENCH RUN] mod_bench"
#hyperfine --runs ${RUN_RUNS:-10} ./target/out/mod_bench{,_inline} ./target/out/mod_bench_llvm_*
echo
echo "[TEST] rust-lang/rust"
rust_toolchain=$(cat rust-toolchain)
git clone https://github.com/rust-lang/rust.git || true
cd rust
git fetch
git checkout $(rustc -V | cut -d' ' -f3 | tr -d '(')
export RUSTFLAGS=
#git apply ../rust_lang.patch
rm config.toml || true
cat > config.toml <<EOF
[rust]
codegen-backends = []
[build]
cargo = "$(which cargo)"
local-rebuild = true
rustc = "$HOME/.rustup/toolchains/$rust_toolchain-$TARGET_TRIPLE/bin/rustc"
EOF
rustc -V | cut -d' ' -f3 | tr -d '('
git checkout $(rustc -V | cut -d' ' -f3 | tr -d '(') src/test
for test in $(rg -i --files-with-matches "//(\[\w+\])?~|// error-pattern:|// build-fail|// run-fail|-Cllvm-args" src/test/ui); do
rm $test
done
git checkout -- src/test/ui/issues/auxiliary/issue-3136-a.rs # contains //~ERROR, but shouldn't be removed
rm -r src/test/ui/{abi*,extern/,panic-runtime/,panics/,unsized-locals/,proc-macro/,threads-sendsync/,thinlto/,simd*,borrowck/,test*,*lto*.rs} || true
for test in $(rg --files-with-matches "catch_unwind|should_panic|thread|lto" src/test/ui); do
rm $test
done
git checkout src/test/ui/type-alias-impl-trait/auxiliary/cross_crate_ice.rs
git checkout src/test/ui/type-alias-impl-trait/auxiliary/cross_crate_ice2.rs
rm src/test/ui/llvm-asm/llvm-asm-in-out-operand.rs || true # TODO: Enable back this test if I ever implement the llvm_asm! macro.
#rm src/test/ui/consts/const-size_of-cycle.rs || true # Error file path difference
#rm src/test/ui/impl-trait/impl-generic-mismatch.rs || true # ^
#rm src/test/ui/type_length_limit.rs || true
#rm src/test/ui/issues/issue-50993.rs || true # Target `thumbv7em-none-eabihf` is not supported
#rm src/test/ui/macros/same-sequence-span.rs || true # Proc macro .rustc section not found?
#rm src/test/ui/suggestions/issue-61963.rs || true # ^
RUSTC_ARGS="-Zpanic-abort-tests -Zcodegen-backend="$(pwd)"/../target/"$CHANNEL"/librustc_codegen_gcc."$dylib_ext" --sysroot "$(pwd)"/../build_sysroot/sysroot -Cpanic=abort"
echo "[TEST] rustc test suite"
# TODO: remove excluded tests when they stop stalling.
COMPILETEST_FORCE_STAGE0=1 ./x.py test --run always --stage 0 src/test/ui/ --rustc-args "$RUSTC_ARGS" --exclude src/test/ui/numbers-arithmetic/saturating-float-casts.rs --exclude src/test/ui/issues/issue-50811.rs

50
compiler/rustc_codegen_gcc/tests/lib.rs Normal file
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use std::{
env::{self, current_dir},
path::PathBuf,
process::Command,
};
use lang_tester::LangTester;
use tempfile::TempDir;
fn main() {
let tempdir = TempDir::new().expect("temp dir");
let current_dir = current_dir().expect("current dir");
let current_dir = current_dir.to_str().expect("current dir").to_string();
let gcc_path = include_str!("../gcc_path");
let gcc_path = gcc_path.trim();
env::set_var("LD_LIBRARY_PATH", gcc_path);
LangTester::new()
.test_dir("tests/run")
.test_file_filter(|path| path.extension().expect("extension").to_str().expect("to_str") == "rs")
.test_extract(|source| {
let lines =
source.lines()
.skip_while(|l| !l.starts_with("//"))
.take_while(|l| l.starts_with("//"))
.map(|l| &l[2..])
.collect::<Vec<_>>()
.join("\n");
Some(lines)
})
.test_cmds(move |path| {
// Test command 1: Compile `x.rs` into `tempdir/x`.
let mut exe = PathBuf::new();
exe.push(&tempdir);
exe.push(path.file_stem().expect("file_stem"));
let mut compiler = Command::new("rustc");
compiler.args(&[
&format!("-Zcodegen-backend={}/target/debug/librustc_codegen_gcc.so", current_dir),
"--sysroot", &format!("{}/build_sysroot/sysroot/", current_dir),
"-Zno-parallel-llvm",
"-C", "panic=abort",
"-C", "link-arg=-lc",
"-o", exe.to_str().expect("to_str"),
path.to_str().expect("to_str"),
]);
// Test command 2: run `tempdir/x`.
let runtime = Command::new(exe);
vec![("Compiler", compiler), ("Run-time", runtime)]
})
.run();
}

51
compiler/rustc_codegen_gcc/tests/run/abort1.rs Normal file
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// Compiler:
//
// Run-time:
// status: signal
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod intrinsics {
use super::Sized;
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
/*
* Code
*/
fn test_fail() -> ! {
unsafe { intrinsics::abort() };
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
test_fail();
}

53
compiler/rustc_codegen_gcc/tests/run/abort2.rs Normal file
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// Compiler:
//
// Run-time:
// status: signal
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod intrinsics {
use super::Sized;
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
/*
* Code
*/
fn fail() -> i32 {
unsafe { intrinsics::abort() };
0
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
fail();
0
}

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compiler/rustc_codegen_gcc/tests/run/array.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 42
// 7
// 5
// 10
#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for usize {}
impl Copy for i32 {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i16 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
pub fn puts(s: *const u8) -> i32;
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
intrinsics::abort();
}
}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[lang = "panic_bounds_check"]
#[track_caller]
#[no_mangle]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "sub"]
pub trait Sub<RHS = Self> {
type Output;
fn sub(self, rhs: RHS) -> Self::Output;
}
impl Sub for usize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for isize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for u8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i16 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
/*
* Code
*/
static mut ONE: usize = 1;
fn make_array() -> [u8; 3] {
[42, 10, 5]
}
#[start]
fn main(argc: isize, _argv: *const *const u8) -> isize {
let array = [42, 7, 5];
let array2 = make_array();
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, array[ONE - 1]);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, array[ONE]);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, array[ONE + 1]);
libc::printf(b"%d\n\0" as *const u8 as *const i8, array2[argc as usize] as u32);
}
0
}

66
compiler/rustc_codegen_gcc/tests/run/asm.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
#![feature(asm, global_asm)]
global_asm!("
.global add_asm
add_asm:
mov rax, rdi
add rax, rsi
ret"
);
extern "C" {
fn add_asm(a: i64, b: i64) -> i64;
}
fn main() {
unsafe {
asm!("nop");
}
let x: u64;
unsafe {
asm!("mov $5, {}",
out(reg) x,
options(att_syntax)
);
}
assert_eq!(x, 5);
let x: u64;
let input: u64 = 42;
unsafe {
asm!("mov {input}, {output}",
"add $1, {output}",
input = in(reg) input,
output = out(reg) x,
options(att_syntax)
);
}
assert_eq!(x, 43);
let x: u64;
unsafe {
asm!("mov {}, 6",
out(reg) x,
);
}
assert_eq!(x, 6);
let x: u64;
let input: u64 = 42;
unsafe {
asm!("mov {output}, {input}",
"add {output}, 1",
input = in(reg) input,
output = out(reg) x,
);
}
assert_eq!(x, 43);
assert_eq!(unsafe { add_asm(40, 2) }, 42);
}

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compiler/rustc_codegen_gcc/tests/run/assign.rs Normal file
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// Compiler:
//
// Run-time:
// stdout: 2
// 7 8
// 10
#![allow(unused_attributes)]
#![feature(auto_traits, lang_items, no_core, start, intrinsics, track_caller)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for *mut i32 {}
impl Copy for usize {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i32 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn puts(s: *const u8) -> i32;
pub fn fflush(stream: *mut i32) -> i32;
pub fn printf(format: *const i8, ...) -> i32;
pub static STDOUT: *mut i32;
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
libc::fflush(libc::STDOUT);
intrinsics::abort();
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
/*
* Code
*/
fn inc_ref(num: &mut isize) -> isize {
*num = *num + 5;
*num + 1
}
fn inc(num: isize) -> isize {
num + 1
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
argc = inc(argc);
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
}
let b = inc_ref(&mut argc);
unsafe {
libc::printf(b"%ld %ld\n\0" as *const u8 as *const i8, argc, b);
}
argc = 10;
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
}
0
}

230
compiler/rustc_codegen_gcc/tests/run/closure.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
// stdout: Arg: 1
// Argument: 1
// String arg: 1
// Int argument: 2
// Both args: 11
#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics,
unboxed_closures)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for usize {}
impl Copy for i32 {}
impl Copy for u32 {}
impl Copy for u8 {}
impl Copy for i8 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn puts(s: *const u8) -> i32;
pub fn printf(format: *const i8, ...) -> i32;
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[lang = "panic_bounds_check"]
#[track_caller]
#[no_mangle]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "unsize"]
pub trait Unsize<T: ?Sized> {}
#[lang = "coerce_unsized"]
pub trait CoerceUnsized<T> {}
impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b T {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a mut U> for &'a mut T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for *mut T {}
#[lang = "fn_once"]
#[rustc_paren_sugar]
pub trait FnOnce<Args> {
#[lang = "fn_once_output"]
type Output;
extern "rust-call" fn call_once(self, args: Args) -> Self::Output;
}
#[lang = "fn_mut"]
#[rustc_paren_sugar]
pub trait FnMut<Args>: FnOnce<Args> {
extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output;
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
intrinsics::abort();
}
}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
let string = "Arg: %d\n\0";
let mut closure = || {
unsafe {
libc::printf(string as *const str as *const i8, argc);
}
};
closure();
let mut closure = || {
unsafe {
libc::printf("Argument: %d\n\0" as *const str as *const i8, argc);
}
};
closure();
let mut closure = |string| {
unsafe {
libc::printf(string as *const str as *const i8, argc);
}
};
closure("String arg: %d\n\0");
let mut closure = |arg: isize| {
unsafe {
libc::printf("Int argument: %d\n\0" as *const str as *const i8, arg);
}
};
closure(argc + 1);
let mut closure = |string, arg: isize| {
unsafe {
libc::printf(string as *const str as *const i8, arg);
}
};
closure("Both args: %d\n\0", argc + 10);
0
}

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// Compiler:
//
// Run-time:
// status: 0
// stdout: true
// 1
#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for usize {}
impl Copy for u64 {}
impl Copy for i32 {}
impl Copy for u32 {}
impl Copy for bool {}
impl Copy for u16 {}
impl Copy for i16 {}
impl Copy for char {}
impl Copy for i8 {}
impl Copy for u8 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
pub fn puts(s: *const u8) -> i32;
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
intrinsics::abort();
}
}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[lang = "panic_bounds_check"]
#[track_caller]
#[no_mangle]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "sub"]
pub trait Sub<RHS = Self> {
type Output;
fn sub(self, rhs: RHS) -> Self::Output;
}
impl Sub for usize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for isize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for u8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i16 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
#[lang = "eq"]
pub trait PartialEq<Rhs: ?Sized = Self> {
fn eq(&self, other: &Rhs) -> bool;
fn ne(&self, other: &Rhs) -> bool;
}
impl PartialEq for u8 {
fn eq(&self, other: &u8) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u8) -> bool {
(*self) != (*other)
}
}
impl PartialEq for u16 {
fn eq(&self, other: &u16) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u16) -> bool {
(*self) != (*other)
}
}
impl PartialEq for u32 {
fn eq(&self, other: &u32) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u32) -> bool {
(*self) != (*other)
}
}
impl PartialEq for u64 {
fn eq(&self, other: &u64) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &u64) -> bool {
(*self) != (*other)
}
}
impl PartialEq for usize {
fn eq(&self, other: &usize) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &usize) -> bool {
(*self) != (*other)
}
}
impl PartialEq for i8 {
fn eq(&self, other: &i8) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &i8) -> bool {
(*self) != (*other)
}
}
impl PartialEq for i32 {
fn eq(&self, other: &i32) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &i32) -> bool {
(*self) != (*other)
}
}
impl PartialEq for isize {
fn eq(&self, other: &isize) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &isize) -> bool {
(*self) != (*other)
}
}
impl PartialEq for char {
fn eq(&self, other: &char) -> bool {
(*self) == (*other)
}
fn ne(&self, other: &char) -> bool {
(*self) != (*other)
}
}
/*
* Code
*/
#[start]
fn main(argc: isize, _argv: *const *const u8) -> isize {
unsafe {
if argc == 1 {
libc::printf(b"true\n\0" as *const u8 as *const i8);
}
let string =
match argc {
1 => b"1\n\0",
2 => b"2\n\0",
3 => b"3\n\0",
4 => b"4\n\0",
5 => b"5\n\0",
_ => b"_\n\0",
};
libc::printf(string as *const u8 as *const i8);
}
0
}

39
compiler/rustc_codegen_gcc/tests/run/empty_main.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
#![feature(auto_traits, lang_items, no_core, start)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
0
}

49
compiler/rustc_codegen_gcc/tests/run/exit.rs Normal file
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// Compiler:
//
// Run-time:
// status: 2
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
mod libc {
#[link(name = "c")]
extern "C" {
pub fn exit(status: i32);
}
}
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
unsafe {
libc::exit(2);
}
0
}

39
compiler/rustc_codegen_gcc/tests/run/exit_code.rs Normal file
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// Compiler:
//
// Run-time:
// status: 1
#![feature(auto_traits, lang_items, no_core, start)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
1
}

223
compiler/rustc_codegen_gcc/tests/run/fun_ptr.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 1
#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for usize {}
impl Copy for i32 {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i16 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
pub fn puts(s: *const u8) -> i32;
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
intrinsics::abort();
}
}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[lang = "panic_bounds_check"]
#[track_caller]
#[no_mangle]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "sub"]
pub trait Sub<RHS = Self> {
type Output;
fn sub(self, rhs: RHS) -> Self::Output;
}
impl Sub for usize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for isize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for u8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i16 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
/*
* Code
*/
fn i16_as_i8(a: i16) -> i8 {
a as i8
}
fn call_func(func: fn(i16) -> i8, param: i16) -> i8 {
func(param)
}
#[start]
fn main(argc: isize, _argv: *const *const u8) -> isize {
unsafe {
let result = call_func(i16_as_i8, argc as i16) as isize;
libc::printf(b"%ld\n\0" as *const u8 as *const i8, result);
}
0
}

129
compiler/rustc_codegen_gcc/tests/run/int_overflow.rs Normal file
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// Compiler:
//
// Run-time:
// stdout: Panicking
// status: signal
#![allow(unused_attributes)]
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for *mut i32 {}
impl Copy for usize {}
impl Copy for i32 {}
impl Copy for u8 {}
impl Copy for i8 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn puts(s: *const u8) -> i32;
pub fn fflush(stream: *mut i32) -> i32;
pub static STDOUT: *mut i32;
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
libc::fflush(libc::STDOUT);
intrinsics::abort();
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
let int = 9223372036854775807isize;
let int = int + argc;
int
}

165
compiler/rustc_codegen_gcc/tests/run/mut_ref.rs Normal file
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// Compiler:
//
// Run-time:
// stdout: 2
// 7
// 6
// 11
#![allow(unused_attributes)]
#![feature(auto_traits, lang_items, no_core, start, intrinsics, track_caller)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for *mut i32 {}
impl Copy for usize {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i32 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn puts(s: *const u8) -> i32;
pub fn fflush(stream: *mut i32) -> i32;
pub fn printf(format: *const i8, ...) -> i32;
pub static STDOUT: *mut i32;
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
libc::fflush(libc::STDOUT);
intrinsics::abort();
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
/*
* Code
*/
struct Test {
field: isize,
}
fn test(num: isize) -> Test {
Test {
field: num + 1,
}
}
fn update_num(num: &mut isize) {
*num = *num + 5;
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
let mut test = test(argc);
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.field);
}
update_num(&mut test.field);
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.field);
}
update_num(&mut argc);
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
}
let refe = &mut argc;
*refe = *refe + 5;
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
}
0
}

221
compiler/rustc_codegen_gcc/tests/run/operations.rs Normal file
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// Compiler:
//
// Run-time:
// stdout: 41
// 39
// 10
#![allow(unused_attributes)]
#![feature(auto_traits, lang_items, no_core, start, intrinsics, arbitrary_self_types)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for *mut i32 {}
impl Copy for usize {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i16 {}
impl Copy for i32 {}
#[lang = "deref"]
pub trait Deref {
type Target: ?Sized;
fn deref(&self) -> &Self::Target;
}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
pub fn puts(s: *const u8) -> i32;
pub fn fflush(stream: *mut i32) -> i32;
pub static STDOUT: *mut i32;
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
libc::fflush(libc::STDOUT);
intrinsics::abort();
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "sub"]
pub trait Sub<RHS = Self> {
type Output;
fn sub(self, rhs: RHS) -> Self::Output;
}
impl Sub for usize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for isize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for u8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i16 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
#[lang = "mul"]
pub trait Mul<RHS = Self> {
type Output;
#[must_use]
fn mul(self, rhs: RHS) -> Self::Output;
}
impl Mul for u8 {
type Output = Self;
fn mul(self, rhs: Self) -> Self::Output {
self * rhs
}
}
impl Mul for usize {
type Output = Self;
fn mul(self, rhs: Self) -> Self::Output {
self * rhs
}
}
impl Mul for isize {
type Output = Self;
fn mul(self, rhs: Self) -> Self::Output {
self * rhs
}
}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, 40 + argc);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, 40 - argc);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, 10 * argc);
}
0
}

222
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 1
#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for usize {}
impl Copy for i32 {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i16 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
pub fn puts(s: *const u8) -> i32;
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
intrinsics::abort();
}
}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[lang = "panic_bounds_check"]
#[track_caller]
#[no_mangle]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
#[lang = "sub"]
pub trait Sub<RHS = Self> {
type Output;
fn sub(self, rhs: RHS) -> Self::Output;
}
impl Sub for usize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for isize {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for u8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i8 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
impl Sub for i16 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self - rhs
}
}
/*
* Code
*/
static mut ONE: usize = 1;
fn make_array() -> [u8; 3] {
[42, 10, 5]
}
#[start]
fn main(argc: isize, _argv: *const *const u8) -> isize {
unsafe {
let ptr = ONE as *mut usize;
let value = ptr as usize;
libc::printf(b"%ld\n\0" as *const u8 as *const i8, value);
}
0
}

72
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 10
// 10
// 42
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
#[lang = "copy"]
pub unsafe trait Copy {}
unsafe impl Copy for bool {}
unsafe impl Copy for u8 {}
unsafe impl Copy for u16 {}
unsafe impl Copy for u32 {}
unsafe impl Copy for u64 {}
unsafe impl Copy for usize {}
unsafe impl Copy for i8 {}
unsafe impl Copy for i16 {}
unsafe impl Copy for i32 {}
unsafe impl Copy for isize {}
unsafe impl Copy for f32 {}
unsafe impl Copy for char {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
}
}
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
/*
* Code
*/
fn int_cast(a: u16, b: i16) -> (u8, u16, u32, usize, i8, i16, i32, isize, u8, u32) {
(
a as u8, a as u16, a as u32, a as usize, a as i8, a as i16, a as i32, a as isize, b as u8,
b as u32,
)
}
#[start]
fn main(argc: isize, _argv: *const *const u8) -> isize {
let (a, b, c, d, e, f, g, h, i, j) = int_cast(10, 42);
unsafe {
libc::printf(b"%d\n\0" as *const u8 as *const i8, c);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, d);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, j);
}
0
}

128
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 5
#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for usize {}
impl Copy for i32 {}
impl Copy for u32 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
}
}
#[lang = "index"]
pub trait Index<Idx: ?Sized> {
type Output: ?Sized;
fn index(&self, index: Idx) -> &Self::Output;
}
impl<T> Index<usize> for [T; 3] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
impl<T> Index<usize> for [T] {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self[index]
}
}
#[lang = "unsize"]
pub trait Unsize<T: ?Sized> {}
#[lang = "coerce_unsized"]
pub trait CoerceUnsized<T> {}
impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b T {}
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a mut U> for &'a mut T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for *mut T {}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
#[lang = "panic_bounds_check"]
#[track_caller]
#[no_mangle]
fn panic_bounds_check(index: usize, len: usize) -> ! {
unsafe {
libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
intrinsics::abort();
}
}
mod intrinsics {
use super::Sized;
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
/*
* Code
*/
static mut TWO: usize = 2;
fn index_slice(s: &[u32]) -> u32 {
unsafe {
s[TWO]
}
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
let array = [42, 7, 5];
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, index_slice(&array));
}
0
}

106
compiler/rustc_codegen_gcc/tests/run/static.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 10
// 14
// 1
// 12
// 12
// 1
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod intrinsics {
use super::Sized;
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
}
}
#[lang = "structural_peq"]
pub trait StructuralPartialEq {}
#[lang = "structural_teq"]
pub trait StructuralEq {}
#[lang = "drop_in_place"]
#[allow(unconditional_recursion)]
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
// Code here does not matter - this is replaced by the
// real drop glue by the compiler.
drop_in_place(to_drop);
}
/*
* Code
*/
struct Test {
field: isize,
}
struct WithRef {
refe: &'static Test,
}
static mut CONSTANT: isize = 10;
static mut TEST: Test = Test {
field: 12,
};
static mut TEST2: Test = Test {
field: 14,
};
static mut WITH_REF: WithRef = WithRef {
refe: unsafe { &TEST },
};
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, CONSTANT);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, TEST2.field);
TEST2.field = argc;
libc::printf(b"%ld\n\0" as *const u8 as *const i8, TEST2.field);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, WITH_REF.refe.field);
WITH_REF.refe = &TEST2;
libc::printf(b"%ld\n\0" as *const u8 as *const i8, TEST.field);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, WITH_REF.refe.field);
}
0
}

70
compiler/rustc_codegen_gcc/tests/run/structs.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 1
// 2
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
}
}
/*
* Code
*/
struct Test {
field: isize,
}
struct Two {
two: isize,
}
fn one() -> isize {
1
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
let test = Test {
field: one(),
};
let two = Two {
two: 2,
};
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.field);
libc::printf(b"%ld\n\0" as *const u8 as *const i8, two.two);
}
0
}

51
compiler/rustc_codegen_gcc/tests/run/tuple.rs Normal file
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// Compiler:
//
// Run-time:
// status: 0
// stdout: 3
#![feature(auto_traits, lang_items, no_core, start, intrinsics)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn printf(format: *const i8, ...) -> i32;
}
}
/*
* Code
*/
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
let test: (isize, isize, isize) = (3, 1, 4);
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.0);
}
0
}