make no-variant types a dedicated Variants variant

2024-12-01 17:33:01 +01:00
parent 21de42bf8d
commit e023590de4
53 changed files with 246 additions and 495 deletions
--- a/compiler/rustc_codegen_ssa/src/debuginfo/mod.rs
+++ b/compiler/rustc_codegen_ssa/src/debuginfo/mod.rs
@@ -65,8 +65,8 @@ fn tag_base_type_opt<'tcx>(
    });

    match enum_type_and_layout.layout.variants() {
-        // A single-variant enum has no discriminant.
-        Variants::Single { .. } => None,
+        // A single-variant or no-variant enum has no discriminant.
+        Variants::Single { .. } | Variants::Empty => None,

        Variants::Multiple { tag_encoding: TagEncoding::Niche { .. }, tag, .. } => {
            // Niche tags are always normalized to unsized integers of the correct size.