[PM] Change LowerExpectIntrinsic to actually return true when it has

changed the IR. This is particularly easy as we can just look for the
existence of any expect intrinsic at all to know whether we've changed
the IR.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226998 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/LowerExpectIntrinsic.cpp b/lib/Transforms/Scalar/LowerExpectIntrinsic.cpp
index 5d3bbbc6047cfedc50a2fbcd806622d8a34db68f..0cea5c5bc59088cb978063f5fb3d75fff4ad7f23 100644 (file)
--- a/lib/Transforms/Scalar/LowerExpectIntrinsic.cpp
+++ b/lib/Transforms/Scalar/LowerExpectIntrinsic.cpp
@@ -144,6 +144,8 @@ static bool handleBranchExpect(BranchInst &BI) {
 }
 
 bool LowerExpectIntrinsic::runOnFunction(Function &F) {
+  bool Changed = false;
+
   for (BasicBlock &BB : F) {
     // Create "block_weights" metadata.
     if (BranchInst *BI = dyn_cast<BranchInst>(BB.getTerminator())) {
@@ -165,11 +167,12 @@ bool LowerExpectIntrinsic::runOnFunction(Function &F) {
         Value *Exp = CI->getArgOperand(0);
         CI->replaceAllUsesWith(Exp);
         CI->eraseFromParent();
+        Changed = true;
       }
     }
   }
 
-  return false;
+  return Changed;
 }
 
 char LowerExpectIntrinsic::ID = 0;