[clang] [TBAA] Extend pointer TBAA to pointers of non-builtin types. (PR #110569)

[John McCall via cfe-commits]

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@@ -221,21 +221,27 @@ llvm::MDNode *CodeGenTBAA::getTypeInfoHelper(const Type *Ty) {
       PtrDepth++;
       Ty = Ty->getPointeeType().getTypePtr();
     } while (Ty->isPointerType());
-    // TODO: Implement C++'s type "similarity" and consider dis-"similar"
-    // pointers distinct for non-builtin types.
+
+    SmallString<256> TyName;
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rjmccall wrote:

Could you move the last part of the comment above ("Computing...") so that it applies to the first block here, maybe with a new lead-in, like "When the underlying type is a builtin type, we compute the pointee type string recursively, which is implicitly..."

https://github.com/llvm/llvm-project/pull/110569