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rust/compiler/rustc_codegen_ssa
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Matthias Krüger 33b0238586
Rollup merge of #127168 - DianQK:cast-size, r=workingjubilee 
Use the aligned size for alloca at args/ret when the pass mode is cast

Fixes #75839. Fixes #121028.

The `load` and `store` instructions in LLVM access the aligned size. For example, `load { i64, i32 }` accesses 16 bytes on x86_64: https://alive2.llvm.org/ce/z/n8CHAp.

BTW, this example is expected to be optimized to immediate UB by Alive2: https://rust.godbolt.org/z/b7xK7hv1c and https://alive2.llvm.org/ce/z/vZDtZH.

r? compiler
2024-07-02 17:47:48 +02:00
..
src Rollup merge of #127168 - DianQK:cast-size, r=workingjubilee 2024-07-02 17:47:48 +02:00
Cargo.toml Make SSA aggregates without needing an alloca 2024-05-08 20:38:04 -07:00
messages.ftl coverage: Tighten validation of #[coverage(off)] and #[coverage(on)] 2024-06-24 20:15:01 +10:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.