Added DEBUG message to ObjCARC when we optimize objc_retain => objc_retainAutorelased...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171535 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index c280cf43583e474b885af39f1994bfb430f87467..1e9b08e736d21e280d1a388301f9c6513a8ce7d3 100644 (file)
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -2199,7 +2199,17 @@ ObjCARCOpt::OptimizeRetainCall(Function &F, Instruction *Retain) {
   // Turn it to an objc_retainAutoreleasedReturnValue..
   Changed = true;
   ++NumPeeps;
+  
+  DEBUG(dbgs() << "ObjCARCOpt::OptimizeRetainCall: Transforming "
+                  "objc_retainAutoreleasedReturnValue => "
+                  "objc_retain since the operand is not a return value.\n"
+                  "                                Old: "
+               << *Retain << "\n");
+  
   cast<CallInst>(Retain)->setCalledFunction(getRetainRVCallee(F.getParent()));
+
+  DEBUG(dbgs() << "                                New: "
+               << *Retain << "\n");
 }
 
 /// OptimizeRetainRVCall - Turn objc_retainAutoreleasedReturnValue into