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Rollup merge of #146667 - calebzulawski:simd-mono-lane-limit, r=lcnr,RalfJung

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Add an attribute to check the number of lanes in a SIMD vector after monomorphization

Allows std::simd to drop the `LaneCount<N>: SupportedLaneCount` trait and maintain good error messages.

Also, extends rust-lang/rust#145967 by including spans in layout errors for all ADTs.

r? ``@RalfJung``

cc ``@workingjubilee`` ``@programmerjake``
This commit is contained in:
Stuart Cook
2025-09-25 20:31:53 +10:00
committed by GitHub
parent 2e715184e9 b53c717e6a
commit 289822299a
2 changed files with 11 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/common.rs
+7 -2
View File
@@ -439,7 +439,10 @@ pub(crate) fn anonymous_str(&mut self, msg: &str) -> Value {
impl<'tcx> LayoutOfHelpers<'tcx> for FullyMonomorphizedLayoutCx<'tcx> {
#[inline]
fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
if let LayoutError::SizeOverflow(_) | LayoutError::ReferencesError(_) = err {
if let LayoutError::SizeOverflow(_)
| LayoutError::InvalidSimd { .. }
| LayoutError::ReferencesError(_) = err
{
self.0.sess.dcx().span_fatal(span, err.to_string())
} else {
self.0
@@ -458,7 +461,9 @@ fn handle_fn_abi_err(
span: Span,
fn_abi_request: FnAbiRequest<'tcx>,
) -> ! {
if let FnAbiError::Layout(LayoutError::SizeOverflow(_)) = err {
if let FnAbiError::Layout(LayoutError::SizeOverflow(_) | LayoutError::InvalidSimd { .. }) =
err
{
self.0.sess.dcx().emit_fatal(Spanned { span, node: err })
} else {
match fn_abi_request {
src/global_asm.rs
+4 -1
View File
@@ -42,7 +42,10 @@ fn mangled_name(&self, instance: Instance<'tcx>) -> String {
impl<'tcx> LayoutOfHelpers<'tcx> for GlobalAsmContext<'_, 'tcx> {
#[inline]
fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
if let LayoutError::SizeOverflow(_) | LayoutError::ReferencesError(_) = err {
if let LayoutError::SizeOverflow(_)
| LayoutError::InvalidSimd { .. }
| LayoutError::ReferencesError(_) = err
{
self.tcx.sess.dcx().span_fatal(span, err.to_string())
} else {
self.tcx