rust/compiler/rustc_mir_transform
Matthias Krüger a8ebfb256a
Rollup merge of #139261 - RalfJung:msvc-align-mitigation, r=oli-obk
mitigate MSVC alignment issue on x86-32

This implements mitigation for https://github.com/rust-lang/rust/issues/112480 by stopping to emit `align` attributes on loads and function arguments when building for a win32 MSVC target. MSVC is known to not properly align `u64` and similar types, and claiming to LLVM that everything is properly aligned increases the chance that this will cause problems.

Of course, the misalignment is still a bug, but we can't fix that bug, only MSVC can.

Also add an errata note to the platform support page warning users about this known problem.

try-job: `i686-msvc*`
2025-04-24 11:40:35 +02:00
..
src Rollup merge of #139261 - RalfJung:msvc-align-mitigation, r=oli-obk 2025-04-24 11:40:35 +02:00
Cargo.toml Stop relying on rustc_type_ir in non-type-system crates 2025-03-15 06:42:48 +00:00
messages.ftl Consolidate ad-hoc MIR lints into real pass-manager-based MIR lints 2025-01-18 21:25:47 +00:00