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| author | DrMeepster <19316085+DrMeepster@users.noreply.github.com> | 2022-02-16 16:52:06 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-02-16 16:52:06 -0800 |
| commit | d0b508e1a7d7f0408a782193c78e7b2ee052ef3b (patch) | |
| tree | b341cf3432bf4d82d3564fb843cbdc0a0291996f | |
| parent | ae32f43c50fc72ba2812c18053c34d1b94aa5e3f (diff) | |
| download | rust-d0b508e1a7d7f0408a782193c78e7b2ee052ef3b.tar.gz rust-d0b508e1a7d7f0408a782193c78e7b2ee052ef3b.zip | |
add comment explaining the check
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/type_of.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/type_of.rs b/compiler/rustc_codegen_llvm/src/type_of.rs index 24e158b489b..fafb9a6dbde 100644 --- a/compiler/rustc_codegen_llvm/src/type_of.rs +++ b/compiler/rustc_codegen_llvm/src/type_of.rs @@ -330,6 +330,8 @@ impl<'tcx> LayoutLlvmExt<'tcx> for TyAndLayout<'tcx> { ty::Ref(..) | ty::RawPtr(_) => { return self.field(cx, index).llvm_type(cx); } + // only wide pointer boxes are handled as pointers + // thin pointer boxes with scalar allocators are handled by the general logic below ty::Adt(def, substs) if def.is_box() && cx.layout_of(substs.type_at(1)).is_zst() => { let ptr_ty = cx.tcx.mk_mut_ptr(self.ty.boxed_ty()); return cx.layout_of(ptr_ty).scalar_pair_element_llvm_type(cx, index, immediate); |