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miri: normalize struct tail in ABI compat check

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This commit is contained in:
Lukas Markeffsky 2024-02-02 21:27:50 +01:00
parent bf3c6c5bed
commit 30e7b87e26
2 changed files with 25 additions and 1 deletions
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6
compiler/rustc_const_eval/src/interpret/terminator.rs
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@ -373,7 +373,11 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
if let (Some(caller), Some(callee)) = (pointee_ty(caller.ty)?, pointee_ty(callee.ty)?) {
// This is okay if they have the same metadata type.
let meta_ty = |ty: Ty<'tcx>| {
let (meta, only_if_sized) = ty.ptr_metadata_ty(*self.tcx, |ty| ty);
// Even if `ty` is normalized, the search for the unsized tail will project
// to fields, which can yield non-normalized types. So we need to provide a
// normalization function.
let normalize = |ty| self.tcx.normalize_erasing_regions(self.param_env, ty);
let (meta, only_if_sized) = ty.ptr_metadata_ty(*self.tcx, normalize);
assert!(
!only_if_sized,
"there should be no more 'maybe has that metadata' types during interpretation"