Fix a bug in the "expect" intrinsic lowering.

llvm-svn: 134566
diff --git a/llvm/lib/Transforms/Utils/LowerExpectIntrinsic.cpp b/llvm/lib/Transforms/Utils/LowerExpectIntrinsic.cpp
index fd94c84..563f7f4 100644
--- a/llvm/lib/Transforms/Utils/LowerExpectIntrinsic.cpp
+++ b/llvm/lib/Transforms/Utils/LowerExpectIntrinsic.cpp
@@ -145,8 +145,11 @@
         continue;
 
       Function *Fn = CI->getCalledFunction();
-      if (Fn && Fn->getIntrinsicID() == Intrinsic::expect)
+      if (Fn && Fn->getIntrinsicID() == Intrinsic::expect) {
+        Value *Exp = CI->getArgOperand(0);
+        CI->replaceAllUsesWith(Exp);
         CI->eraseFromParent();
+      }
     }
   }