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[ObjCARC Debug Messages] This is a squashed commit of 3x debug message commits ala echristo's suggestion. 

1. Added debug messages when in OptimizeIndividualCalls we move calls into predecessors and then erase the original call.
2. Added debug messages when in the process of moving calls in ObjCARCOpt::MoveCalls we create new RR and delete old RR.
3. Added a debug message when we visit a specific retain instruction in ObjCARCOpt::PerformCodePlacement.

llvm-svn: 171988
This commit is contained in:
Michael Gottesman 2013-01-09 19:23:24 +00:00
parent 2f2edd3fb1
commit c189a392ce
1 changed files with 24 additions and 0 deletions
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24
llvm/lib/Transforms/Scalar/ObjCARC.cpp
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@ -2562,10 +2562,16 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
Op = new BitCastInst(Op, ParamTy, "", InsertPos);
Clone->setArgOperand(0, Op);
Clone->insertBefore(InsertPos);
DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: Cloning "
<< *CInst << "\n"
" And inserting "
"clone at " << *InsertPos << "\n");
Worklist.push_back(std::make_pair(Clone, Incoming));
}
}
// Erase the original call.
DEBUG(dbgs() << "Erasing: " << *CInst << "\n");
EraseInstruction(CInst);
continue;
}
@ -3226,6 +3232,11 @@ void ObjCARCOpt::MoveCalls(Value *Arg,
MDNode::get(M->getContext(), ArrayRef<Value *>()));
else
Call->setTailCall();
DEBUG(dbgs() << "ObjCARCOpt::MoveCalls: Inserting new Release: " << *Call
<< "\n"
" At insertion point: " << *InsertPt
<< "\n");
}
for (SmallPtrSet<Instruction *, 2>::const_iterator
PI = RetainsToMove.ReverseInsertPts.begin(),
@ -3241,6 +3252,11 @@ void ObjCARCOpt::MoveCalls(Value *Arg,
Call->setDoesNotThrow();
if (ReleasesToMove.IsTailCallRelease)
Call->setTailCall();
DEBUG(dbgs() << "ObjCARCOpt::MoveCalls: Inserting new Retain: " << *Call
<< "\n"
" At insertion point: " << *InsertPt
<< "\n");
}
// Delete the original retain and release calls.
@ -3250,6 +3266,8 @@ void ObjCARCOpt::MoveCalls(Value *Arg,
Instruction *OrigRetain = *AI;
Retains.blot(OrigRetain);
DeadInsts.push_back(OrigRetain);
DEBUG(dbgs() << "ObjCARCOpt::MoveCalls: Deleting retain: " << *OrigRetain <<
"\n");
}
for (SmallPtrSet<Instruction *, 2>::const_iterator
AI = ReleasesToMove.Calls.begin(),
@ -3257,6 +3275,8 @@ void ObjCARCOpt::MoveCalls(Value *Arg,
Instruction *OrigRelease = *AI;
Releases.erase(OrigRelease);
DeadInsts.push_back(OrigRelease);
DEBUG(dbgs() << "ObjCARCOpt::MoveCalls: Deleting release: " << *OrigRelease
<< "\n");
}
}
@ -3282,6 +3302,10 @@ ObjCARCOpt::PerformCodePlacement(DenseMap<const BasicBlock *, BBState>
if (!V) continue; // blotted
Instruction *Retain = cast<Instruction>(V);
DEBUG(dbgs() << "ObjCARCOpt::PerformCodePlacement: Visiting: " << *Retain
<< "\n");
Value *Arg = GetObjCArg(Retain);
// If the object being released is in static or stack storage, we know it's