CFI: Fix cfi with repr(transparent): transform_ty: unexpected Alias(Proj

Fixes #111185 by normalizing ty::Alias before encoding.

Author: rcvalle

compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs

@@ -674,12 +674,12 @@ fn encode_ty<'tcx>(
         }
 
         // Unexpected types
-        ty::Bound(..)
+        ty::Alias(..)
+        | ty::Bound(..)
         | ty::Error(..)
         | ty::GeneratorWitness(..)
         | ty::GeneratorWitnessMIR(..)
         | ty::Infer(..)
-        | ty::Alias(..)
         | ty::Placeholder(..) => {
             bug!("encode_ty: unexpected `{:?}`", ty.kind());
         }
@@ -913,12 +913,19 @@ fn transform_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, options: TransformTyOptio
             );
         }
 
+        ty::Alias(..) => {
+            ty = transform_ty(
+                tcx,
+                tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), ty),
+                options,
+            );
+        }
+
         ty::Bound(..)
         | ty::Error(..)
         | ty::GeneratorWitness(..)
         | ty::GeneratorWitnessMIR(..)
         | ty::Infer(..)
-        | ty::Alias(..)
         | ty::Param(..)
         | ty::Placeholder(..) => {
             bug!("transform_ty: unexpected `{:?}`", ty.kind());

tests/codegen/sanitizer-cfi-emit-type-metadata-id-itanium-cxx-abi.rs

@@ -587,6 +587,6 @@ pub fn foo149(_: Type14<Bar>, _: Type14<Bar>, _: Type14<Bar>) { }
 // CHECK: ![[TYPE144]] = !{i64 0, !"_ZTSFvu3refIvEE"}
 // CHECK: ![[TYPE145]] = !{i64 0, !"_ZTSFvu3refIvES_E"}
 // CHECK: ![[TYPE146]] = !{i64 0, !"_ZTSFvu3refIvES_S_E"}
-// CHECK: ![[TYPE147]] = !{i64 0, !"_ZTSFvu{{[0-9]+}}NtC{{[[:print:]]+}}_51sanitizer_cfi_emit_type_metadata_id_itanium_cxx_abi3BarE
-// CHECK: ![[TYPE148]] = !{i64 0, !"_ZTSFvu{{[0-9]+}}NtC{{[[:print:]]+}}_51sanitizer_cfi_emit_type_metadata_id_itanium_cxx_abi3BarS_E
-// CHECK: ![[TYPE149]] = !{i64 0, !"_ZTSFvu{{[0-9]+}}NtC{{[[:print:]]+}}_51sanitizer_cfi_emit_type_metadata_id_itanium_cxx_abi3BarS_S_E
+// CHECK: ![[TYPE147]] = !{i64 0, !"_ZTSFvu{{[0-9]+}}NtC{{[[:print:]]+}}_51sanitizer_cfi_emit_type_metadata_id_itanium_cxx_abi3BarE"}
+// CHECK: ![[TYPE148]] = !{i64 0, !"_ZTSFvu{{[0-9]+}}NtC{{[[:print:]]+}}_51sanitizer_cfi_emit_type_metadata_id_itanium_cxx_abi3BarS_E"}
+// CHECK: ![[TYPE149]] = !{i64 0, !"_ZTSFvu{{[0-9]+}}NtC{{[[:print:]]+}}_51sanitizer_cfi_emit_type_metadata_id_itanium_cxx_abi3BarS_S_E"}