1 files changed, 10 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/GlobalMergeFunctions.cpp b/llvm/lib/CodeGen/GlobalMergeFunctions.cpp
index 470582885fab..e920b1be6822 100644
--- a/llvm/lib/CodeGen/GlobalMergeFunctions.cpp
+++ b/llvm/lib/CodeGen/GlobalMergeFunctions.cpp
@@ -60,11 +60,17 @@ static bool canParameterizeCallOperand(const CallBase *CI, unsigned OpIdx) {
     if (Name.starts_with("__dtrace"))
       return false;
   }
-  if (isCalleeOperand(CI, OpIdx) &&
-      CI->getOperandBundle(LLVMContext::OB_ptrauth).has_value()) {
+  if (isCalleeOperand(CI, OpIdx)) {
     // The operand is the callee and it has already been signed. Ignore this
     // because we cannot add another ptrauth bundle to the call instruction.
-    return false;
+    if (CI->getOperandBundle(LLVMContext::OB_ptrauth).has_value())
+      return false;
+  } else {
+    // The target of the arc-attached call must be a constant and cannot be
+    // parameterized.
+    if (CI->isOperandBundleOfType(LLVMContext::OB_clang_arc_attachedcall,
+                                  OpIdx))
+      return false;
   }
   return true;
 }
@@ -154,7 +160,7 @@ static Value *createCast(IRBuilder<> &Builder, Value *V, Type *DestTy) {
     auto *DestAT = dyn_cast<ArrayType>(DestTy);
     assert(DestAT);
     assert(SrcAT->getNumElements() == DestAT->getNumElements());
-    Value *Result = UndefValue::get(DestTy);
+    Value *Result = PoisonValue::get(DestTy);
     for (unsigned int I = 0, E = SrcAT->getNumElements(); I < E; ++I) {
       Value *Element =
           createCast(Builder, Builder.CreateExtractValue(V, ArrayRef(I)),