Added debug message in ObjCARC when we remove a no-op cast which has only special...

[oota-llvm.git] / lib / Transforms / Scalar / ObjCARC.cpp

diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index de0971394b7fb6b3b4c7af2a8bc2c0d4a7d74c7b..e68f2add73b856247c771a1c01f417a3b6254443 100644 (file)
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -2261,7 +2261,18 @@ ObjCARCOpt::OptimizeRetainRVCall(Function &F, Instruction *RetainRV) {
   // Turn it to a plain objc_retain.
   Changed = true;
   ++NumPeeps;
+  
+  DEBUG(dbgs() << "ObjCARCOpt::OptimizeRetainRVCall: Transforming "
+                  "objc_retainAutoreleasedReturnValue => "
+                  "objc_retain since the operand is not a return value.\n"
+                  "                                  Old: "
+               << *RetainRV << "\n");
+  
   cast<CallInst>(RetainRV)->setCalledFunction(getRetainCallee(F.getParent()));
+
+  DEBUG(dbgs() << "                                  New: "
+               << *RetainRV << "\n");
+
   return false;
 }
 
@@ -2287,8 +2298,20 @@ ObjCARCOpt::OptimizeAutoreleaseRVCall(Function &F, Instruction *AutoreleaseRV) {
 
   Changed = true;
   ++NumPeeps;
+
+  DEBUG(dbgs() << "ObjCARCOpt::OptimizeAutoreleaseRVCall: Transforming "
+                  "objc_autoreleaseReturnValue => "
+                  "objc_autorelease since its operand is not used as a return "
+                  "value.\n"
+                  "                                       Old: "
+               << *AutoreleaseRV << "\n");
+
   cast<CallInst>(AutoreleaseRV)->
     setCalledFunction(getAutoreleaseCallee(F.getParent()));
+  
+  DEBUG(dbgs() << "                                       New: "
+               << *AutoreleaseRV << "\n");
+  
 }
 
 /// OptimizeIndividualCalls - Visit each call, one at a time, and make
@@ -2320,6 +2343,8 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
     case IC_NoopCast:
       Changed = true;
       ++NumNoops;
+      DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: Erasing no-op cast:"
+                   " " << *Inst << "\n");
       EraseInstruction(Inst);
       continue;