diff options
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs index 40248a9009a..e4da540da5c 100644 --- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs +++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs @@ -1500,6 +1500,18 @@ fn build_vtable_type_di_node<'ll, 'tcx>( .di_node } +fn find_vtable_behind_cast<'ll>(vtable: &'ll Value) -> &'ll Value { + // The vtable is a global variable, which may be behind an addrspacecast. + unsafe { + if let Some(c) = llvm::LLVMIsAConstantExpr(vtable) { + if llvm::LLVMGetConstOpcode(c) == llvm::Opcode::AddrSpaceCast { + return llvm::LLVMGetOperand(c, 0).unwrap(); + } + } + } + vtable +} + pub(crate) fn apply_vcall_visibility_metadata<'ll, 'tcx>( cx: &CodegenCx<'ll, 'tcx>, ty: Ty<'tcx>, @@ -1520,6 +1532,7 @@ pub(crate) fn apply_vcall_visibility_metadata<'ll, 'tcx>( let Some(trait_ref) = trait_ref else { return }; + let vtable = find_vtable_behind_cast(vtable); let trait_ref_self = trait_ref.with_self_ty(cx.tcx, ty); let trait_ref_self = cx.tcx.erase_regions(trait_ref_self); let trait_def_id = trait_ref_self.def_id(); @@ -1593,6 +1606,8 @@ pub(crate) fn create_vtable_di_node<'ll, 'tcx>( return; } + let vtable = find_vtable_behind_cast(vtable); + // When full debuginfo is enabled, we want to try and prevent vtables from being // merged. Otherwise debuggers will have a hard time mapping from dyn pointer // to concrete type. |