RustWrapper: adapt for rename of Intrinsic::getDeclaration
llvm/llvm-project@fa789dffb1 renamed getDeclaration to getOrInsertDeclaration.
`@rustbot` label: +llvm-main
Add intrinsics `fmuladd{f16,f32,f64,f128}`. This computes `(a * b) +
c`, to be fused if the code generator determines that (i) the target
instruction set has support for a fused operation, and (ii) that the
fused operation is more efficient than the equivalent, separate pair
of `mul` and `add` instructions.
https://llvm.org/docs/LangRef.html#llvm-fmuladd-intrinsic
MIRI support is included for f32 and f64.
The codegen_cranelift uses the `fma` function from libc, which is a
correct implementation, but without the desired performance semantic. I
think this requires an update to cranelift to expose a suitable
instruction in its IR.
I have not tested with codegen_gcc, but it should behave the same
way (using `fma` from libc).
Rollup of 6 pull requests
Successful merges:
- #129079 (Create `_imp__` symbols also when doing ThinLTO)
- #131208 (ABI: Pass aggregates by value on AIX)
- #131394 (fix(rustdoc): add space between struct fields and their descriptions)
- #131519 (Use Default visibility for rustc-generated C symbol declarations)
- #131541 (compiletest: Extract auxiliary-crate properties to their own module/struct)
- #131542 (next-solver: remove outdated FIXMEs)
r? `@ghost`
`@rustbot` modify labels: rollup
Use Default visibility for rustc-generated C symbol declarations
Non-default visibilities should only be used for definitions, not declarations, otherwise linking can fail.
This is based on https://github.com/rust-lang/rust/pull/123994.
Issue https://github.com/rust-lang/rust/issues/123427
When I changed `default-hidden-visibility` to `default-visibility` in https://github.com/rust-lang/rust/pull/130005, I updated all places in the code that used `default-hidden-visibility`, replicating the hidden-visibility bug to also happen for protected visibility.
Without this change, trying to build rustc with `-Z default-visibility=protected` fails with a link error.
ABI: Pass aggregates by value on AIX
On AIX we pass aggregates byval. Adds new ABI for AIX for powerpc64.
313ad85dfa/clang/lib/CodeGen/Targets/PPC.cpp (L216)
Fixes the following 2 testcases on AIX:
```
tests/ui/abi/extern/extern-pass-TwoU16s.rs
tests/ui/abi/extern/extern-pass-TwoU8s.rs
```
Create `_imp__` symbols also when doing ThinLTO
When generating a rlib crate on Windows we create `dllimport` / `_imp__` symbols for each global. This effectively makes the rlib contain an import library for itself and allows them to both be dynamically and statically linked. However when doing ThinLTO we do not generate these and thus we end up with missing symbols. Microsoft's `link` can fix these up (and emits warnings), but `lld` seems to currently be unable to.
This PR also does this generation for ThinLTO avoiding those issues with `lld` and also avoids the warnings on `link`.
This is an workaround for https://github.com/rust-lang/rust/issues/81408.
cc `@lqd`
Retire the `unnamed_fields` feature for now
`#![feature(unnamed_fields)]` was implemented in part in #115131 and #115367, however work on that feature has (afaict) stalled and in the mean time there have been some concerns raised (e.g.[^1][^2]) about whether `unnamed_fields` is worthwhile to have in the language, especially in its current desugaring. Because it represents a compiler implementation burden including a new kind of anonymous ADT and additional complication to field selection, and is quite prone to bugs today, I'm choosing to remove the feature.
However, since I'm not one to really write a bunch of words, I'm specifically *not* going to de-RFC this feature. This PR essentially *rolls back* the state of this feature to "RFC accepted but not yet implemented"; however if anyone wants to formally unapprove the RFC from the t-lang side, then please be my guest. I'm just not totally willing to summarize the various language-facing reasons for why this feature is or is not worthwhile, since I'm coming from the compiler side mostly.
Fixes#117942Fixes#121161Fixes#121263Fixes#121299Fixes#121722Fixes#121799Fixes#126969Fixes#131041
Tracking:
* https://github.com/rust-lang/rust/issues/49804
[^1]: https://rust-lang.zulipchat.com/#narrow/stream/213817-t-lang/topic/Unnamed.20struct.2Funion.20fields
[^2]: https://github.com/rust-lang/rust/issues/49804#issuecomment-1972619108
Consider outermost const-anon in `non_local_def` lint
This PR change the logic for finding the parent of the `impl` definition in the `non_local_definitions` lint to consider multiple level of const-anon items, instead of only one currently.
I also took the opportunity to cleanup the related code.
cc ``@traviscross``
Fixes https://github.com/rust-lang/rust/issues/131474
stabilize `ci_rustc_if_unchanged_logic` test
Makes `ci_rustc_if_unchanged_logic` test more stable and re-enables it. Previously, it was expecting CI-rustc to be used all the time when there were no changes, which wasn’t always the case. Purpose of this test is making sure we don't use CI-rustc while there are changes in compiler and/or library, but we don't really need to cover cases where CI-rustc is not enabled.
Second commit was pushed for making a change in the compiler tree, so `ci_rustc_if_unchanged_logic` can be tested properly in merge CI.
Non-default visibilities should only be used for definitions, not
declarations, otherwise linking can fail.
Co-authored-by: Collin Baker <collinbaker@chromium.org>
Avoid redundant sysroot additions to `PATH` when linking
Currently, `rustc` prepends `$HOME/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/bin` to the `PATH` three times before invoking the linker, which is unnecessary, once should be enough.
Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not really important.
`````@rustbot````` A-linkage
Compiler & its UI tests: Rename remaining occurrences of "object safe" to "dyn compatible"
Follow-up to #130826.
Part of #130852.
1. 1st commit: Fix stupid oversights. Should've been part of #130826.
2. 2nd commit: Rename the unstable feature `object_safe_for_dispatch` to `dyn_compatible_for_dispatch`. Might not be worth the churn, you decide.
3. 3rd commit: Apply the renaming to all UI tests (contents and paths).
Precise capturing in traits
This PR begins to implement `feature(precise_capturing_in_traits)`, which enables using the `impl Trait + use<..>` syntax for RPITITs. It implements this by giving the desugared GATs variance, and representing the uncaptured lifetimes as bivariant, like how opaque captures work.
Right now, I've left out implementing a necessary extension to the `refining_impl_trait` lint, and also I've made it so that all RPITITs always capture the parameters that come from the trait, because I'm not totally yet convinced that it's sound to not capture these args. It's certainly required to capture the type and const parameters from the trait (e.g. Self), or else users could bivariantly relate two RPITIT args that come from different impls, but region parameters don't affect trait selection in the same way, so it *may* be possible to relax this in the future. Let's stay conservative for now, though.
I'm not totally sure what tests could be added on top of the ones I already added, since we really don't need to exercise the `precise_capturing` feature but simply what makes it special for RPITITs.
r? types
Tracking issue:
* #130044
rustc_target: Add sme-b16b16 as an explicit aarch64 target feature
LLVM 20 split out what used to be called b16b16 and correspond to aarch64
FEAT_SVE_B16B16 into sve-b16b16 and sme-b16b16.
Add sme-b16b16 as an explicit feature and update the codegen accordingly.
Resolves https://github.com/rust-lang/rust/pull/129894.
codegen_ssa: consolidate tied target checks
Fixes#105110.
Fixes#105111.
`rustc_codegen_llvm` and `rustc_codegen_gcc` duplicated logic for checking if tied target features were partially enabled. This PR consolidates these checks into `rustc_codegen_ssa` in the `codegen_fn_attrs` query, which also is run pre-monomorphisation for each function, which ensures that this check is run for unused functions, as would be expected.
Also adds a test confirming that enabling one tied feature doesn't imply another - the appropriate error for this was already being emitted. I did a bisect and narrowed it down to two patches it was likely to be - something in #128796, probably #128221 or #128679.
Introduce SolverRelating type relation to the new solver
Redux of #128744.
Splits out relate for the new solver so that implementors don't need to implement it themselves.
r? lcnr
Apple: Avoid redundant `-Wl,-dylib` flag when linking
Seems to have been introduced all the way back in e338a4154b, but should be redundant, `-dynamiclib` should already make `cc` set `-dylib` when linking.
Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not that important to fix.
`@rustbot` label O-apple
fix/update teach_note from 'escaping mutable ref/ptr' const-check
The old note was quite confusing since it talked about statics, but the message is also shown for consts. So let's reword to something that is true for both of them.
Fix a few relative paths in rustc doc
## Changes
- Don't inline the doc for re-exporting some structs that have relative paths in doc.
## Context
See #124028.
- Most of the relative links in rustdoc are there because of circular import (so syntax like `[MyType]: rustc_foo::bar` is difficult to achieve when we cannot import `rustc_xxx` due to circular import)
- Here, I disable new links for re-exports. I think it's fine for re-exported items in `hir::*`.
- There is a few more relative links in other `rustc` crates, however they are not addressed in this PR, as they are not re-exported and/so the relative paths are working.
Closes#124028.
r? `@fmease`
Let me know if I miss anything or there's any other way to address this issue.
LLVM 20 split out what used to be called b16b16 and correspond to aarch64
FEAT_SVE_B16B16 into sve-b16b16 and sme-b16b16.
Add sme-b16b16 as an explicit feature and update the codegen accordingly.
Fix needless_lifetimes in rustc_serialize
Hi,
This PR fixes the following clipy warnings:
```
warning: the following explicit lifetimes could be elided: 'a
--> compiler/rustc_serialize/src/serialize.rs:328:6
|
328 | impl<'a, S: Encoder, T: Encodable<S>> Encodable<S> for Cow<'a, [T]>
| ^^ ^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
= note: `#[warn(clippy::needless_lifetimes)]` on by default
help: elide the lifetimes
|
328 - impl<'a, S: Encoder, T: Encodable<S>> Encodable<S> for Cow<'a, [T]>
328 + impl<S: Encoder, T: Encodable<S>> Encodable<S> for Cow<'_, [T]>
|
warning: the following explicit lifetimes could be elided: 'a
--> compiler/rustc_serialize/src/serialize.rs:348:6
|
348 | impl<'a, S: Encoder> Encodable<S> for Cow<'a, str> {
| ^^ ^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
help: elide the lifetimes
|
348 - impl<'a, S: Encoder> Encodable<S> for Cow<'a, str> {
348 + impl<S: Encoder> Encodable<S> for Cow<'_, str> {
|
warning: the following explicit lifetimes could be elided: 'a
--> compiler/rustc_serialize/src/serialize.rs:355:6
|
355 | impl<'a, D: Decoder> Decodable<D> for Cow<'a, str> {
| ^^ ^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
help: elide the lifetimes
|
355 - impl<'a, D: Decoder> Decodable<D> for Cow<'a, str> {
355 + impl<D: Decoder> Decodable<D> for Cow<'_, str> {
```
Best regards,
Michal
compiler: Stop reexporting enum-globs from `rustc_target::abi`
Three enums had **all** their variants glob-exported into a distressingly large amount of the tree. Cease to do that, and also cease to glob import the contents of the module that contained them. Redirect relevant imports to their actual source, the `rustc_abi` crate.
No functional changes.
Dont ICE when encountering post-mono layout cycle error
It's possible to encounter post-mono layout cycle errors in `fn_abi_of_instance`. Don't ICE in those cases.
This was originally discovered in an async fn, but that's not the only way to encounter such an error (which the other test I added should demonstrate).
Error messsages suck, but this fix is purely about suppressing the ICE.
Fixes#131409
[Coverage][MCDC] Adapt mcdc to llvm 19
Related issue: #126672
Also finish task 4 at #124144
[llvm #82448](https://github.com/llvm/llvm-project/pull/82448) has introduced some break changes into mcdc, causing incompatibility between llvm 18 and 19. This draft adapts to that change and gives up supporting for llvm-18.
`Deref`/`DerefMut` can be useful, but they can also obfuscate. I don't
think they're worth it for `RegionConstraintCollector`. They're also not
present on the similar types `OpaqueTypeTable` and `TypeVariableTable`.
`LeakCheck` can own `mini_graph` and `rcc` instead of holding references
to them. This requires inlining `assign_scc_value` to avoid a borrowck
error, but that's fine because it has a single call site.
It's a weird method, and used weirdly:
- It's on `RegionConstraintCollector` but operates on
`RegionConstraintStorage`. So at both call sites we create a temporary
`RegionConstraintCollector`, using `with_log`, to call it.
- It `take`s just two of the six fields in `RegionConstraintStorage`.
At one of the two call sites we unnecessarily clone the entire
`RegionConstraintStorage` just to take those two fields.
This commit just inlines and removes it. We no longer need to `take` the
two fields, we can just use them directly.
`OutlivesEnvironment::new` can call `OutlivesEnvironment::with_bounds`
with an empty `extra_bounds`. And once that's done,
`OutlivesEnvironmentBuilder` has a single use and can be inlined and
removed into `OutlivesEnvironment::with_bounds`.
Fix `target_vendor` in non-IDF Xtensa ESP32 targets
`rustc`'s Xtensa ESP32 targets are the following:
- `xtensa-esp32-none-elf`
- `xtensa-esp32-espidf`
- `xtensa-esp32s2-none-elf`
- `xtensa-esp32s2-espidf`
- `xtensa-esp32s3-none-elf`
- `xtensa-esp32s3-espidf`
The ESP-IDF targets already set `target_vendor="espressif"`, however, the ESP32 is, from my understanding, produced by Espressif regardless of whether using the IDF or not, so we should set the target vendor there as well?
Add missing module flags for `-Zfunction-return=thunk-extern`
This fixes a bug in the `-Zfunction-return=thunk-extern` flag. The flag needs to be passed onto LLVM to ensure that functions such as `asan.module_ctor` and `asan.module_dtor` that are created internally in LLVM have the mitigation applied to them.
This was originally discovered [in the Linux kernel](https://lore.kernel.org/all/CANiq72myZL4_poCMuNFevtpYYc0V0embjSuKb7y=C+m3vVA_8g@mail.gmail.com/).
Original flag PR: #116892
PR for similar issue: #129373
Tracking issue: #116853
cc ``@ojeda``
r? ``@wesleywiser``
Remove `CombineFields`
This conflicts with #131263, but if this one lands first then perhaps #131263 could then go ahead and remove all the branching on solver in `TypeRelating`. We could perhaps then rename `TypeRelating` to `OldSolverRelating` or something, idk.
r? lcnr
Fix used_underscore_binding in rustc_serialize
Hi,
This PR fixes the following clippy warnings in rustc_serialize
```
warning: used underscore-prefixed binding
--> compiler/rustc_serialize/src/opaque.rs:443:27
|
443 | debug_assert_eq!((_end_pos - _start_pos), IntEncodedWithFixedSize::ENCODED_SIZE);
| ^^^^^^^^
|
note: binding is defined here
--> compiler/rustc_serialize/src/opaque.rs:442:13
|
442 | let _end_pos = e.position();
| ^^^^^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#used_underscore_binding
= note: requested on the command line with `-W clippy::used-underscore-binding`
warning: used underscore-prefixed binding
--> compiler/rustc_serialize/src/opaque.rs:443:38
|
443 | debug_assert_eq!((_end_pos - _start_pos), IntEncodedWithFixedSize::ENCODED_SIZE);
| ^^^^^^^^^^
|
note: binding is defined here
--> compiler/rustc_serialize/src/opaque.rs:440:13
|
440 | let _start_pos = e.position();
| ^^^^^^^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#used_underscore_binding
```
Best regards,
Michal
Couple of changes to make it easier to compile rustc for wasm
This is a subset of the patches I have on my rust fork to compile rustc for wasm32-wasip1.
Don't allow the `#[pointee]` attribute where it doesn't belong
Error if the `#[pointee]` attribute is applied to anything but generic type parameters.
Closes#128485
Related to #123430
coverage: Multiple small tweaks to counter creation
I've been experimenting with some larger changes to how coverage counters are assigned to parts of the control-flow graph, and while none of that is ready yet, along the way I've repeatedly found myself wanting these smaller tweaks as a base.
There are no changes to compiler output.
Don't use Immediate::offset to transmute pointers to integers
This applies the relatively new `assert_matches_abi` check in the `offset` operation on immediates, which makes sure that if offsets are used to alter the layout (which is possible because the field layout is arbitrarily picked by the caller), this is not done in a way that breaks the invariant of the `Immediate` type.
This leads to ICEs in a GVN mir-opt test, so the second commit fixes GVN.
Fixes https://github.com/rust-lang/rust/issues/131064.
`FixupError` is isomorphic with `TyOrConstInferVar`, so this commit
changes it to just be a wrapper around `TyOrConstInferVar`.
Also, move the `Display` impl for `FixupError` next to `FixupError`.
Three of the modules don't need to be `pub`, and then
`warn(unreachable_pub)` identifies a bunch more things that also
shouldn't be `pub`, plus a couple of things that are unused.
add `naked_asm!` macro for use in `#[naked]` functions
tracking issue: https://github.com/rust-lang/rust/issues/90957
Adds the `core::arch::naked_asm` macro, to be used in `#[naked]` functions, but providing better error messages and a place to explain the restrictions on assembly in naked functions.
This PR does not yet require that the `naked_asm!` macro is used inside of `#[naked]` functions:
- the `asm!` macro can still be used in `#[naked]` functions currently, with the same restrictions and error messages as before.
- the `naked_asm!` macro can be used outside of `#[naked]` functions. It has not yet been decided whether that should be allowed long-term.
In this PR, the parsing code of `naked_asm!` now enforces the restrictions on assembly in naked functions, with the exception of checking that the `noreturn` option is specified. It also has not currently been decided if `noreturn` should be implicit or not.
This PR looks large because it touches a bunch of tests. The code changes are mostly straightforward I think: we now have 3 flavors of assembly macro, and that information must be propagated through the parsing code and error messages.
cc `@Lokathor`
r? `@Amanieu`
- fix for divergence
- fix error message
- fix another cranelift test
- fix some cranelift things
- don't set the NORETURN option for naked asm
- fix use of naked_asm! in doc comment
- fix use of naked_asm! in run-make test
- use `span_bug` in unreachable branch
Make deprecated_cfg_attr_crate_type_name a hard error
Turns the forward compatibility lint added by #83744 into a hard error, so now, while the `#![crate_name]` and `#![crate_type]` attributes are still allowed in raw form, they are now forbidden to be nested inside a `#![cfg_attr()]` attribute.
The following will now be an error:
```Rust
#![cfg_attr(foo, crate_name = "foobar")]
#![cfg_attr(foo, crate_type = "bin")]
```
This code will continue working and is not deprecated:
```Rust
#![crate_name = "foobar"]
#![crate_type = "lib"]
```
The reasoning for this is explained in #83744: it allows us to not have to cfg-expand in order to determine the crate's type and name.
As of filing the PR, exactly two years have passed since #99784 has been merged, which has turned the lint's default warning level into an error, so there has been ample time to move off the now-forbidden syntax.
cc #91632 - tracking issue for the lint
This makes it possible for other parts of counter-assignment to check whether a
node is guaranteed to end up with some kind of counter.
Switching from `impl Fn` to a concrete `&BitSet` just avoids the hassle of
trying to store a closure in a struct field, and currently there's no
foreseeable need for this information to not be a bitset.
On function and method calls in patterns, link to the book
```
error: expected a pattern, found an expression
--> f889.rs:3:13
|
3 | let (x, y.drop()) = (1, 2);
| ^^^^^^^^ not a pattern
|
= note: arbitrary expressions are not allowed in patterns: <https://doc.rust-lang.org/book/ch18-00-patterns.html>
error[E0532]: expected a pattern, found a function call
--> f889.rs:2:13
|
2 | let (x, drop(y)) = (1, 2);
| ^^^^ not a tuple struct or tuple variant
|
= note: function calls are not allowed in patterns: <https://doc.rust-lang.org/book/ch18-00-patterns.html>
```
Fix#97200.
