Added debug message for ObjCARC when we zap an objc_autoreleaseReturnValue/objc_retai...

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

diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index ab2dc402d2d030c2fb5de834e773d6f00dea90d5..de0971394b7fb6b3b4c7af2a8bc2c0d4a7d74c7b 100644 (file)
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -912,7 +912,7 @@ bool ObjCARCExpand::runOnFunction(Function &F) {
     }
   }
   
-  DEBUG(dbgs() << "ObjCARCExpand: Finished Queue.\n\n");
+  DEBUG(dbgs() << "ObjCARCExpand: Finished List.\n\n");
   
   return Changed;
 }
@@ -995,6 +995,9 @@ bool ObjCARCAPElim::OptimizeBB(BasicBlock *BB) {
       // zap the pair.
       if (Push && cast<CallInst>(Inst)->getArgOperand(0) == Push) {
         Changed = true;
+        DEBUG(dbgs() << "ObjCARCAPElim::OptimizeBB: Zapping push pop autorelease pair:\n"
+                     << "                           Pop: " << *Inst << "\n"
+                     << "                           Push: " << *Push << "\n");
         Inst->eraseFromParent();
         Push->eraseFromParent();
       }
@@ -2196,7 +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
@@ -2234,6 +2247,11 @@ ObjCARCOpt::OptimizeRetainRVCall(Function &F, Instruction *RetainRV) {
         GetObjCArg(I) == Arg) {
       Changed = true;
       ++NumPeeps;
+      
+      DEBUG(dbgs() << "ObjCARCOpt::OptimizeRetainRVCall: Erasing " << *I << "\n"
+                   << "                                  Erasing " << *RetainRV
+                   << "\n");
+      
       EraseInstruction(I);
       EraseInstruction(RetainRV);
       return true;
@@ -2283,7 +2301,7 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
   for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {
     Instruction *Inst = &*I++;
 
-    DEBUG(dbgs() << "ObjCARCOpt: OptimizeIndividualCalls: Visiting: " <<
+    DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: Visiting: " <<
           *Inst << "\n");
 
     InstructionClass Class = GetBasicInstructionClass(Inst);
@@ -2500,7 +2518,7 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
       }
     } while (!Worklist.empty());
 
-    DEBUG(dbgs() << "ObjCARCOpt: Finished Individual Call Queue.\n\n");
+    DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: Finished Queue.\n\n");
 
   }
 }
@@ -3406,7 +3424,7 @@ void ObjCARCOpt::OptimizeWeakCalls(Function &F) {
   for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ) {
     Instruction *Inst = &*I++;
 
-    DEBUG(dbgs() << "ObjCARCOpt: OptimizeWeakCalls: Visiting: " << *Inst <<
+    DEBUG(dbgs() << "ObjCARCOpt::OptimizeWeakCalls: Visiting: " << *Inst <<
           "\n");
 
     InstructionClass Class = GetBasicInstructionClass(Inst);
@@ -3555,7 +3573,7 @@ void ObjCARCOpt::OptimizeWeakCalls(Function &F) {
     }
   }
   
-  DEBUG(dbgs() << "ObjCARCOpt: Finished visiting weak calls.\n\n");
+  DEBUG(dbgs() << "ObjCARCOpt::OptimizeWeakCalls: Finished List.\n\n");
   
 }
 
@@ -3606,7 +3624,7 @@ void ObjCARCOpt::OptimizeReturns(Function &F) {
     BasicBlock *BB = FI;
     ReturnInst *Ret = dyn_cast<ReturnInst>(&BB->back());
 
-    DEBUG(dbgs() << "ObjCARCOpt: OptimizeReturns: Visiting: " << *Ret << "\n");
+    DEBUG(dbgs() << "ObjCARCOpt::OptimizeReturns: Visiting: " << *Ret << "\n");
 
     if (!Ret) continue;
 
@@ -3692,7 +3710,7 @@ void ObjCARCOpt::OptimizeReturns(Function &F) {
     Visited.clear();
   }
   
-  DEBUG(dbgs() << "ObjCARCOpt: OptimizeReturns: Finished visiting returns.\n\n");
+  DEBUG(dbgs() << "ObjCARCOpt::OptimizeReturns: Finished List.\n\n");
   
 }
 
@@ -4147,6 +4165,8 @@ bool ObjCARCContract::runOnFunction(Function &F) {
       } while (isNoopInstruction(BBI));
 
       if (&*BBI == GetObjCArg(Inst)) {
+        DEBUG(dbgs() << "ObjCARCContract: Adding inline asm marker for "
+                        "retainAutoreleasedReturnValue optimization.\n");
         Changed = true;
         InlineAsm *IA =
           InlineAsm::get(FunctionType::get(Type::getVoidTy(Inst->getContext()),
@@ -4166,6 +4186,10 @@ bool ObjCARCContract::runOnFunction(Function &F) {
           ConstantPointerNull::get(cast<PointerType>(CI->getType()));
         Changed = true;
         new StoreInst(Null, CI->getArgOperand(0), CI);
+        
+        DEBUG(dbgs() << "OBJCARCContract: Old = " << *CI << "\n"
+                     << "                 New = " << *Null << "\n");
+        
         CI->replaceAllUsesWith(Null);
         CI->eraseFromParent();
       }
@@ -4185,7 +4209,7 @@ bool ObjCARCContract::runOnFunction(Function &F) {
       continue;
     }
 
-    DEBUG(dbgs() << "ObjCARCContract: Finished Queue.\n\n");
+    DEBUG(dbgs() << "ObjCARCContract: Finished List.\n\n");
 
     // Don't use GetObjCArg because we don't want to look through bitcasts
     // and such; to do the replacement, the argument must have type i8*.