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Stop SRoA'ing DynMetadata in MIR

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This commit is contained in:
Scott McMurray 2024-05-24 00:40:39 -07:00
parent 213ad10c8f
commit d7248d7b71
2 changed files with 24 additions and 0 deletions
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5
compiler/rustc_mir_transform/src/sroa.rs
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@ -70,6 +70,11 @@ fn escaping_locals<'tcx>(
// Exclude #[repr(simd)] types so that they are not de-optimized into an array
return true;
}
if Some(def.did()) == tcx.lang_items().dyn_metadata() {
// codegen wants to see the `DynMetadata<T>`,
// not the inner reference-to-opaque-type.
return true;
}
// We already excluded unions and enums, so this ADT must have one variant
let variant = def.variant(FIRST_VARIANT);
if variant.fields.len() > 1 {