[clang] [compiler-rt] [llvm] [ASan] Add metadata to renamed instructions so ASan doesn't use the i… (PR #119387)

[Florian Hahn via llvm-commits]

================
@@ -3391,6 +3391,27 @@ static void findStoresToUninstrumentedArgAllocas(
   }
 }
 
+StringRef getAllocaName(AllocaInst *AI) {
+  // Alloca could have been renamed for uniqueness. Its true name will have been
+  // recorded as an annotation.
+  if (AI->hasMetadata(LLVMContext::MD_annotation)) {
+    MDTuple *Annotation =
+        (MDTuple *)AI->getMetadata(LLVMContext::MD_annotation);
+    for (int i = 0; i < Annotation->getNumOperands(); i++) {
----------------
fhahn wrote:

Can we directly iterate over the operands?

https://github.com/llvm/llvm-project/pull/119387