[clang][DebugInfo] Mark _BitInt's as reconstitutable when emitting -gsimple-template-names (#168383)

Depends on:
* https://github.com/llvm/llvm-project/pull/168382

As of recent, LLVM includes the bit-size as a `DW_AT_bit_size` (and as
part of `DW_AT_name`) of `_BitInt`s in DWARF. This allows us to mark
`_BitInt`s as "reconstitutable" when compiling with
`-gsimple-template-names`. We still only omit template parameters that
are `<= 64` bit wide. So support `_BitInt`s larger than 64 bits is not
part of this patch.

1 files changed, 0 insertions, 9 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 8299d45ece76..1489b5116e6c 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -5869,15 +5869,6 @@ struct ReconstitutableType : public RecursiveASTVisitor<ReconstitutableType> {
     Reconstitutable = false;
     return false;
   }
-  bool VisitType(Type *T) {
-    // _BitInt(N) isn't reconstitutable because the bit width isn't encoded in
-    // the DWARF, only the byte width.
-    if (T->isBitIntType()) {
-      Reconstitutable = false;
-      return false;
-    }
-    return true;
-  }
   bool TraverseEnumType(EnumType *ET, bool = false) {
     // Unnamed enums can't be reconstituted due to a lack of column info we
     // produce in the DWARF, so we can't get Clang's full name back.