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Rollup merge of #135295 - eyraudh:master, r=compiler-errors

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Check empty SIMD vector in inline asm

fixes [#134334](https://github.com/rust-lang/rust/issues/134334)
This commit is contained in:
Stuart Cook 2025-04-02 13:10:36 +11:00 • committed by GitHub
commit bae53a7c3c
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4 changed files with 38 additions and 9 deletions
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8
compiler/rustc_hir_analysis/src/check/intrinsicck.rs
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@ -29,6 +29,7 @@ enum NonAsmTypeReason<'tcx> {
Invalid(Ty<'tcx>),
InvalidElement(DefId, Ty<'tcx>),
NotSizedPtr(Ty<'tcx>),
EmptySIMDArray(Ty<'tcx>),
}
impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
@ -102,6 +103,9 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
}
ty::Adt(adt, args) if adt.repr().simd() => {
let fields = &adt.non_enum_variant().fields;
if fields.is_empty() {
return Err(NonAsmTypeReason::EmptySIMDArray(ty));
}
let field = &fields[FieldIdx::ZERO];
let elem_ty = field.ty(self.tcx(), args);
@ -226,6 +230,10 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
can be used as arguments for inline assembly",
).emit();
}
NonAsmTypeReason::EmptySIMDArray(ty) => {
let msg = format!("use of empty SIMD vector `{ty}`");
self.infcx.dcx().struct_span_err(expr.span, msg).emit();
}
}
return None;
}