diff --git a/llvm/lib/CodeGen/TypePromotion.cpp b/llvm/lib/CodeGen/TypePromotion.cpp
--- a/llvm/lib/CodeGen/TypePromotion.cpp
+++ b/llvm/lib/CodeGen/TypePromotion.cpp
@@ -204,6 +204,7 @@
 }
 
 bool TypePromotion::LessOrEqualTypeSize(Value *V) {
+  assert(!V);
   return V->getType()->getScalarSizeInBits() <= TypeSize;
 }