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This commit is contained in:
Caleb Zulawski 2024-06-01 14:17:16 -04:00
parent 86158f581d
commit 9bdc5b2455
2 changed files with 9 additions and 3 deletions
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7
compiler/rustc_codegen_llvm/src/intrinsic.rs
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@ -480,10 +480,15 @@ impl<'ll, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'_, 'll, 'tcx> {
}
_ if name.as_str().starts_with("simd_") => {
// Unpack non-power-of-2 #[repr(packed)]
// Unpack non-power-of-2 #[repr(packed, simd)] arguments.
// This gives them the expected layout of a regular #[repr(simd)] vector.
let mut loaded_args = Vec::new();
for (ty, arg) in arg_tys.iter().zip(args) {
loaded_args.push(
// #[repr(packed, simd)] vectors are passed like arrays (as references,
// with reduced alignment and no padding) rather than as immediates.
// We can use a vector load to fix the layout and turn the argument
// into an immediate.
if ty.is_simd()
&& let OperandValue::Ref(place) = arg.val
{