diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index 80e0027..3ce7482 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -1891,6 +1891,10 @@
 /// by inserting it into the appropriate sets
 bool GVN::processInstruction(Instruction *I,
                              SmallVectorImpl<Instruction*> &toErase) {
+  // Ignore dbg info intrinsics.
+  if (isa<DbgInfoIntrinsic>(I))
+    return false;
+
   if (LoadInst *LI = dyn_cast<LoadInst>(I)) {
     bool Changed = processLoad(LI, toErase);