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Wasm-bindgen abi compat using cast_to

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This commit is contained in:
bjorn3 2021-01-26 11:31:37 +01:00
parent ecbc661030
commit 903c553f4a
3 changed files with 49 additions and 9 deletions
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2
compiler/rustc_middle/src/ty/layout.rs
View File

@ -2860,7 +2860,7 @@ where
return;
}
if let Err(msg) = self.adjust_for_cabi(cx, abi) {
if let Err(msg) = self.adjust_for_cabi(cx, &cx.tcx().sess.target_features, abi) {
cx.tcx().sess.fatal(&msg);
}
}

11
compiler/rustc_target/src/abi/call/mod.rs
View File

@ -53,6 +53,8 @@ pub enum PassMode {
// Hack to disable non_upper_case_globals only for the bitflags! and not for the rest
// of this module
pub use attr_impl::ArgAttribute;
use rustc_data_structures::stable_set::FxHashSet;
use rustc_span::Symbol;
#[allow(non_upper_case_globals)]
#[allow(unused)]
@ -592,7 +594,12 @@ pub struct FnAbi<'a, Ty> {
}
impl<'a, Ty> FnAbi<'a, Ty> {
pub fn adjust_for_cabi<C>(&mut self, cx: &C, abi: spec::abi::Abi) -> Result<(), String>
pub fn adjust_for_cabi<C>(
&mut self,
cx: &C,
target_features: &FxHashSet<Symbol>,
abi: spec::abi::Abi,
) -> Result<(), String>
where
Ty: TyAndLayoutMethods<'a, C> + Copy,
C: LayoutOf<Ty = Ty, TyAndLayout = TyAndLayout<'a, Ty>> + HasDataLayout + HasTargetSpec,
@ -633,7 +640,7 @@ impl<'a, Ty> FnAbi<'a, Ty> {
"riscv32" | "riscv64" => riscv::compute_abi_info(cx, self),
"wasm32" => match cx.target_spec().os.as_str() {
"emscripten" | "wasi" => wasm32::compute_abi_info(cx, self),
_ => wasm32_bindgen_compat::compute_abi_info(self),
_ => wasm32_bindgen_compat::compute_abi_info(cx, target_features, self),
},
"asmjs" => wasm32::compute_abi_info(cx, self),
a => return Err(format!("unrecognized arch \"{}\" in target specification", a)),

45
compiler/rustc_target/src/abi/call/wasm32_bindgen_compat.rs
View File

@ -5,25 +5,58 @@
// can be fixed to work with the correct ABI. See #63649 for further
// discussion.
use crate::abi::call::{ArgAbi, FnAbi};
use rustc_data_structures::stable_set::FxHashSet;
use rustc_span::Symbol;
fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) {
use crate::abi::call::{ArgAbi, FnAbi, Uniform};
use crate::abi::{HasDataLayout, LayoutOf, TyAndLayout, TyAndLayoutMethods};
fn classify_ret<'a, Ty, C>(cx: &C, target_features: &FxHashSet<Symbol>, ret: &mut ArgAbi<'a, Ty>)
where
Ty: TyAndLayoutMethods<'a, C> + Copy,
C: LayoutOf<Ty = Ty, TyAndLayout = TyAndLayout<'a, Ty>> + HasDataLayout,
{
if ret.layout.is_aggregate() {
if let Some(unit) = ret.layout.homogeneous_aggregate(cx).ok().and_then(|ha| ha.unit()) {
let size = ret.layout.size;
if unit.size == size || target_features.contains(&Symbol::intern("multivalue")) {
ret.cast_to(Uniform { unit, total: size });
}
}
}
ret.extend_integer_width_to(32);
}
fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) {
fn classify_arg<'a, Ty, C>(cx: &C, arg: &mut ArgAbi<'a, Ty>)
where
Ty: TyAndLayoutMethods<'a, C> + Copy,
C: LayoutOf<Ty = Ty, TyAndLayout = TyAndLayout<'a, Ty>> + HasDataLayout,
{
if arg.layout.is_aggregate() {
if let Some(unit) = arg.layout.homogeneous_aggregate(cx).ok().and_then(|ha| ha.unit()) {
let size = arg.layout.size;
arg.cast_to(Uniform { unit, total: size });
}
}
arg.extend_integer_width_to(32);
}
pub fn compute_abi_info<Ty>(fn_abi: &mut FnAbi<'_, Ty>) {
pub fn compute_abi_info<'a, Ty, C>(
cx: &C,
target_features: &FxHashSet<Symbol>,
fn_abi: &mut FnAbi<'a, Ty>,
) where
Ty: TyAndLayoutMethods<'a, C> + Copy,
C: LayoutOf<Ty = Ty, TyAndLayout = TyAndLayout<'a, Ty>> + HasDataLayout,
{
if !fn_abi.ret.is_ignore() {
classify_ret(&mut fn_abi.ret);
classify_ret(cx, target_features, &mut fn_abi.ret);
}
for arg in &mut fn_abi.args {
if arg.is_ignore() {
continue;
}
classify_arg(arg);
classify_arg(cx, arg);
}
}