Index: llvm/trunk/lib/Transforms/Scalar/GVN.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Scalar/GVN.cpp
+++ llvm/trunk/lib/Transforms/Scalar/GVN.cpp
@@ -1167,8 +1167,7 @@
   if (!CanDoPRE) {
     while (!NewInsts.empty()) {
       Instruction *I = NewInsts.pop_back_val();
-      if (MD) MD->removeInstruction(I);
-      I->eraseFromParent();
+      markInstructionForDeletion(I);
     }
     // HINT: Don't revert the edge-splitting as following transformation may
     // also need to split these critical edges.