Copy byval argument to alloca if alignment is insufficient #122212
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r? @wesleywiser rustbot has assigned @wesleywiser. Use r? to explicitly pick a reviewer |
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erikdesjardins
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Mar 8, 2024
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| let align = attrs.pointee_align.unwrap_or(self.layout.align.abi); | ||
| OperandValue::Ref(val, None, align).store(bx, dst); |
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The only functional change in this file is replacing
OperandValue::Ref(val, None, self.layout.align.abi).store(bx, dst)with
let align = attrs.pointee_align.unwrap_or(self.layout.align.abi);
OperandValue::Ref(val, None, align).store(bx, dst);since the argument alignment is not always equal to the Rust ABI alignment.
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| if let Some(pointee_align) = attrs.pointee_align | ||
| && pointee_align < arg.layout.align.abi | ||
| { | ||
| // ...unless the argument is underaligned, then we need to copy it to | ||
| // a higher-aligned alloca. | ||
| let tmp = PlaceRef::alloca(bx, arg.layout); | ||
| bx.store_fn_arg(arg, &mut llarg_idx, tmp); | ||
| LocalRef::Place(tmp) | ||
| } else { |
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This is the only functional change in this file.
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Need to adjust the comment added in #122050. |
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@nikic done |
wesleywiser
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Mar 13, 2024
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Thank you @erikdesjardins! 🏅 @bors r+ |
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…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#117118 ([AIX] Remove AixLinker's debuginfo() implementation) - rust-lang#121650 (change std::process to drop supplementary groups based on CAP_SETGID) - rust-lang#121764 (Make incremental sessions identity no longer depend on the crate names provided by source code) - rust-lang#122212 (Copy byval argument to alloca if alignment is insufficient) - rust-lang#122322 (coverage: Initial support for branch coverage instrumentation) - rust-lang#122373 (Fix the conflict problem between the diagnostics fixes of lint `unnecessary_qualification` and `unused_imports`) - rust-lang#122479 (Implement `Duration::as_millis_{f64,f32}`) - rust-lang#122487 (Rename `StmtKind::Local` variant into `StmtKind::Let`) - rust-lang#122498 (Update version of cc crate) - rust-lang#122503 (Make `SubdiagMessageOp` well-formed) r? `@ghost` `@rustbot` modify labels: rollup
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…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#117118 ([AIX] Remove AixLinker's debuginfo() implementation) - rust-lang#121650 (change std::process to drop supplementary groups based on CAP_SETGID) - rust-lang#121764 (Make incremental sessions identity no longer depend on the crate names provided by source code) - rust-lang#122212 (Copy byval argument to alloca if alignment is insufficient) - rust-lang#122322 (coverage: Initial support for branch coverage instrumentation) - rust-lang#122373 (Fix the conflict problem between the diagnostics fixes of lint `unnecessary_qualification` and `unused_imports`) - rust-lang#122479 (Implement `Duration::as_millis_{f64,f32}`) - rust-lang#122487 (Rename `StmtKind::Local` variant into `StmtKind::Let`) - rust-lang#122498 (Update version of cc crate) - rust-lang#122503 (Make `SubdiagMessageOp` well-formed) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#122212 - erikdesjardins:byval-align2, r=wesleywiser Copy byval argument to alloca if alignment is insufficient Fixes rust-lang#122211 "Ignore whitespace" recommended.
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Fixes #122211
"Ignore whitespace" recommended.