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[ObjCARC] More debug messages. 

llvm-svn: 172346
This commit is contained in:
Michael Gottesman 2013-01-13 07:00:51 +00:00
parent c5cc9f154d
commit af2113ffb5
1 changed files with 29 additions and 4 deletions
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33
llvm/lib/Transforms/Scalar/ObjCARC.cpp
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@ -894,6 +894,8 @@ bool ObjCARCExpand::runOnFunction(Function &F) {
bool Changed = false; bool Changed = false;
DEBUG(dbgs() << "ObjCARCExpand: Visiting Function: " << F.getName() << "\n");
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) { for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
Instruction *Inst = &*I; Instruction *Inst = &*I;
@ -2630,8 +2632,13 @@ ObjCARCOpt::CheckForCFGHazards(const BasicBlock *BB,
// If the terminator is an invoke marked with the // If the terminator is an invoke marked with the
// clang.arc.no_objc_arc_exceptions metadata, the unwind edge can be // clang.arc.no_objc_arc_exceptions metadata, the unwind edge can be
// ignored, for ARC purposes. // ignored, for ARC purposes.
if (isa<InvokeInst>(TI) && TI->getMetadata(NoObjCARCExceptionsMDKind)) if (isa<InvokeInst>(TI) && TI->getMetadata(NoObjCARCExceptionsMDKind)) {
DEBUG(dbgs() << "ObjCARCOpt::CheckForCFGHazards: Found an invoke "
"terminator marked with "
"clang.arc.no_objc_arc_exceptions. Ignoring unwind "
"edge.\n");
--SE; --SE;
}
for (; SI != SE; ++SI) { for (; SI != SE; ++SI) {
Sequence SuccSSeq = S_None; Sequence SuccSSeq = S_None;
@ -2684,8 +2691,13 @@ ObjCARCOpt::CheckForCFGHazards(const BasicBlock *BB,
// If the terminator is an invoke marked with the // If the terminator is an invoke marked with the
// clang.arc.no_objc_arc_exceptions metadata, the unwind edge can be // clang.arc.no_objc_arc_exceptions metadata, the unwind edge can be
// ignored, for ARC purposes. // ignored, for ARC purposes.
if (isa<InvokeInst>(TI) && TI->getMetadata(NoObjCARCExceptionsMDKind)) if (isa<InvokeInst>(TI) && TI->getMetadata(NoObjCARCExceptionsMDKind)) {
DEBUG(dbgs() << "ObjCARCOpt::CheckForCFGHazards: Found an invoke "
"terminator marked with "
"clang.arc.no_objc_arc_exceptions. Ignoring unwind "
"edge.\n");
--SE; --SE;
}
for (; SI != SE; ++SI) { for (; SI != SE; ++SI) {
Sequence SuccSSeq = S_None; Sequence SuccSSeq = S_None;
@ -2752,8 +2764,11 @@ ObjCARCOpt::VisitInstructionBottomUp(Instruction *Inst,
// Theoretically we could implement removal of nested retain+release // Theoretically we could implement removal of nested retain+release
// pairs by making PtrState hold a stack of states, but this is // pairs by making PtrState hold a stack of states, but this is
// simple and avoids adding overhead for the non-nested case. // simple and avoids adding overhead for the non-nested case.
if (S.GetSeq() == S_Release || S.GetSeq() == S_MovableRelease) if (S.GetSeq() == S_Release || S.GetSeq() == S_MovableRelease) {
DEBUG(dbgs() << "ObjCARCOpt::VisitInstructionBottomUp: Found nested "
"releases (i.e. a release pair)\n");
NestingDetected = true; NestingDetected = true;
}
MDNode *ReleaseMetadata = Inst->getMetadata(ImpreciseReleaseMDKind); MDNode *ReleaseMetadata = Inst->getMetadata(ImpreciseReleaseMDKind);
S.ResetSequenceProgress(ReleaseMetadata ? S_MovableRelease : S_Release); S.ResetSequenceProgress(ReleaseMetadata ? S_MovableRelease : S_Release);
@ -2916,6 +2931,8 @@ ObjCARCOpt::VisitBottomUp(BasicBlock *BB,
if (isa<InvokeInst>(Inst)) if (isa<InvokeInst>(Inst))
continue; continue;
DEBUG(dbgs() << "ObjCARCOpt::VisitButtonUp: Visiting " << *Inst << "\n");
NestingDetected |= VisitInstructionBottomUp(Inst, BB, Retains, MyStates); NestingDetected |= VisitInstructionBottomUp(Inst, BB, Retains, MyStates);
} }
@ -3098,6 +3115,9 @@ ObjCARCOpt::VisitTopDown(BasicBlock *BB,
// Visit all the instructions, top-down. // Visit all the instructions, top-down.
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) { for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
Instruction *Inst = I; Instruction *Inst = I;
DEBUG(dbgs() << "ObjCARCOpt::VisitTopDown: Visiting " << *Inst << "\n");
NestingDetected |= VisitInstructionTopDown(Inst, Releases, MyStates); NestingDetected |= VisitInstructionTopDown(Inst, Releases, MyStates);
} }
@ -3136,8 +3156,13 @@ ComputePostOrders(Function &F,
// If the terminator is an invoke marked with the // If the terminator is an invoke marked with the
// clang.arc.no_objc_arc_exceptions metadata, the unwind edge can be // clang.arc.no_objc_arc_exceptions metadata, the unwind edge can be
// ignored, for ARC purposes. // ignored, for ARC purposes.
if (isa<InvokeInst>(TI) && TI->getMetadata(NoObjCARCExceptionsMDKind)) if (isa<InvokeInst>(TI) && TI->getMetadata(NoObjCARCExceptionsMDKind)) {
DEBUG(dbgs() << "ObjCARCOpt::ComputePostOrders: Found an invoke "
"terminator marked with "
"clang.arc.no_objc_arc_exceptions. Ignoring unwind "
"edge.\n");
--SE; --SE;
}
while (SuccStack.back().second != SE) { while (SuccStack.back().second != SE) {
BasicBlock *SuccBB = *SuccStack.back().second++; BasicBlock *SuccBB = *SuccStack.back().second++;