bjoernager/rust
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Variants::Single: do not use invalid VariantIdx for uninhabited enums

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This commit is contained in:
Ralf Jung 2024-12-01 13:12:43 +01:00
parent 37e74596c0
commit 21de42bf8d
47 changed files with 549 additions and 281 deletions
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3
compiler/rustc_codegen_ssa/src/mir/place.rs
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@ -244,6 +244,7 @@ impl<'a, 'tcx, V: CodegenObject> PlaceRef<'tcx, V> {
}
let (tag_scalar, tag_encoding, tag_field) = match self.layout.variants {
Variants::Single { index } => {
let index = index.unwrap(); // we already checked `is_uninhabited`
let discr_val = self
.layout
.ty
@ -366,7 +367,7 @@ impl<'a, 'tcx, V: CodegenObject> PlaceRef<'tcx, V> {
}
match self.layout.variants {
Variants::Single { index } => {
assert_eq!(index, variant_index);
assert_eq!(index.unwrap(), variant_index);
}
Variants::Multiple { tag_encoding: TagEncoding::Direct, tag_field, .. } => {
let ptr = self.project_field(bx, tag_field);