diff --git a/llvm/lib/IR/Value.cpp b/llvm/lib/IR/Value.cpp
--- a/llvm/lib/IR/Value.cpp
+++ b/llvm/lib/IR/Value.cpp
@@ -58,8 +58,11 @@
   // FIXME: Why isn't this in the subclass gunk??
   // Note, we cannot call isa<CallInst> before the CallInst has been
   // constructed.
-  if (SubclassID == Instruction::Call || SubclassID == Instruction::Invoke ||
-      SubclassID == Instruction::CallBr)
+  unsigned OpCode = 0;
+  if (SubclassID >= InstructionVal)
+    OpCode = SubclassID - InstructionVal;
+  if (OpCode == Instruction::Call || OpCode == Instruction::Invoke ||
+      OpCode == Instruction::CallBr)
     assert((VTy->isFirstClassType() || VTy->isVoidTy() || VTy->isStructTy()) &&
            "invalid CallInst type!");
   else if (SubclassID != BasicBlockVal &&