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

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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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171988 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-01-09 19:23:24 +00:00
parent ebed123c5c
commit 5581115075
1 changed files with 24 additions and 0 deletions
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24
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