Index: clang/lib/CodeGen/ItaniumCXXABI.cpp
===================================================================
--- clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -962,7 +962,9 @@
   else
     dstAdj = llvm::ConstantExpr::getNSWAdd(srcAdj, adj);
 
-  return llvm::ConstantExpr::getInsertValue(src, dstAdj, 1);
+  llvm::Constant *res = ConstantFoldInsertValueInstruction(src, dstAdj, 1);
+  assert(res != nullptr && "Folding must succeed");
+  return res;
 }
 
 llvm::Constant *
Index: llvm/include/llvm/Analysis/TargetFolder.h
===================================================================
--- llvm/include/llvm/Analysis/TargetFolder.h
+++ llvm/include/llvm/Analysis/TargetFolder.h
@@ -150,7 +150,7 @@
     auto *CAgg = dyn_cast<Constant>(Agg);
     auto *CVal = dyn_cast<Constant>(Val);
     if (CAgg && CVal)
-      return Fold(ConstantExpr::getInsertValue(CAgg, CVal, IdxList));
+      return ConstantFoldInsertValueInstruction(CAgg, CVal, IdxList);
     return nullptr;
   }
 
Index: llvm/include/llvm/IR/ConstantFolder.h
===================================================================
--- llvm/include/llvm/IR/ConstantFolder.h
+++ llvm/include/llvm/IR/ConstantFolder.h
@@ -139,7 +139,7 @@
     auto *CAgg = dyn_cast<Constant>(Agg);
     auto *CVal = dyn_cast<Constant>(Val);
     if (CAgg && CVal)
-      return ConstantExpr::getInsertValue(CAgg, CVal, IdxList);
+      return ConstantFoldInsertValueInstruction(CAgg, CVal, IdxList);
     return nullptr;
   }
 
Index: llvm/lib/Analysis/ConstantFolding.cpp
===================================================================
--- llvm/lib/Analysis/ConstantFolding.cpp
+++ llvm/lib/Analysis/ConstantFolding.cpp
@@ -1093,7 +1093,7 @@
   case Instruction::InsertElement:
     return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
   case Instruction::InsertValue:
-    return ConstantExpr::getInsertValue(
+    return ConstantFoldInsertValueInstruction(
         Ops[0], Ops[1], cast<InsertValueInst>(InstOrCE)->getIndices());
   case Instruction::ShuffleVector:
     return ConstantExpr::getShuffleVector(