[llvm] [MergeFunc] Fix crash caused by bitcasting ArrayType (PR #133259)

[Florian Hahn via llvm-commits]

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@@ -76,6 +76,41 @@ void IRBuilderBase::SetInstDebugLocation(Instruction *I) const {
     }
 }
 
+Value *IRBuilderBase::CreateAggregateCast(Value *V, Type *DestTy) {
+  Type *SrcTy = V->getType();
+  if (SrcTy == DestTy)
+    return V;
+  if (auto *SrcST = dyn_cast<StructType>(SrcTy)) {
+    assert(DestTy->isStructTy() && "Expected StructType");
+    auto *DestST = cast<StructType>(DestTy);
+    assert(SrcST->getNumElements() == DestST->getNumElements());
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fhahn wrote:

add message to assert

https://github.com/llvm/llvm-project/pull/133259