================
@@ -185,10 +185,33 @@ llvm::MDNode *CodeGenTBAA::getTypeInfoHelper(const Type
*Ty) {
return getChar();
// Handle pointers and references.
- // TODO: Implement C++'s type "similarity" and consider dis-"similar"
- // pointers distinct.
- if (Ty->isPointerType() || Ty->isReferenceType())
- return createScalarTypeNode("any pointer", getChar(), Size);
+ if (Ty->isPointerType() || Ty->isReferenceType()) {
+ llvm::MDNode *AnyPtr = createScalarTypeNode("any pointer", getChar(),
Size);
+ if (CodeGenOpts.RelaxedPointerAliasing)
+ return AnyPtr;
+ // Compute the depth of the pointer and generate a tag of the form
"p<depth>
+ // <base type tag>".
+ unsigned PtrDepth = 0;
+ do {
+ PtrDepth++;
+ Ty = Ty->getPointeeType().getTypePtr();
+ } while (Ty->isPointerType() || Ty->isReferenceType());
----------------
rjmccall wrote:
A reference type is impossible in these nested positions; you can never have
references/pointers to references. I believe it is possible in the original
position because we can use this when building aggregate TBAA.
https://github.com/llvm/llvm-project/pull/76612
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