bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

only emit pointer-like metadata for BZST-allocator Box

Browse source
This commit is contained in:
Michael Goulet 2022-03-07 23:06:59 -08:00
parent 67b3e81838
commit 307ee94a8a
3 changed files with 27 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs
View file

@ -617,7 +617,9 @@ pub fn type_metadata<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>, t: Ty<'tcx>) -> &'ll
ty::RawPtr(ty::TypeAndMut { ty: pointee_type, .. }) | ty::Ref(_, pointee_type, _) => {
pointer_or_reference_metadata(cx, t, pointee_type, unique_type_id)
}
ty::Adt(def, _) if def.is_box() => {
// Box<T, A> may have a non-ZST allocator A. In that case, we
// cannot treat Box<T, A> as just an owned alias of `*mut T`.
ty::Adt(def, substs) if def.is_box() && cx.layout_of(substs.type_at(1)).is_zst() => {
pointer_or_reference_metadata(cx, t, t.boxed_ty(), unique_type_id)
}
ty::FnDef(..) | ty::FnPtr(_) => subroutine_type_metadata(cx, unique_type_id),