Index: lib/Transforms/InstCombine/InstCombineInternal.h
===================================================================
--- lib/Transforms/InstCombine/InstCombineInternal.h
+++ lib/Transforms/InstCombine/InstCombineInternal.h
@@ -290,6 +290,7 @@
   Instruction *visitSelectInst(SelectInst &SI);
   Instruction *visitCallInst(CallInst &CI);
   Instruction *visitInvokeInst(InvokeInst &II);
+  Instruction *visitDbgInfoIntrinsic(DbgInfoIntrinsic &CI) { return nullptr; }
 
   Instruction *SliceUpIllegalIntegerPHI(PHINode &PN);
   Instruction *visitPHINode(PHINode &PN);