///
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "objc-arc-opts"
#include "ObjCARC.h"
#include "ARCRuntimeEntryPoints.h"
#include "DependencyAnalysis.h"
using namespace llvm;
using namespace llvm::objcarc;
+#define DEBUG_TYPE "objc-arc-opts"
+
/// \defgroup MiscUtils Miscellaneous utilities that are not ARC specific.
/// @{
return FindSingleUseIdentifiedObject(
cast<CallInst>(Arg)->getArgOperand(0));
if (!IsObjCIdentifiedObject(Arg))
- return 0;
+ return nullptr;
return Arg;
}
// If we found an identifiable object but it has multiple uses, but they are
// trivial uses, we can still consider this to be a single-use value.
if (IsObjCIdentifiedObject(Arg)) {
- for (Value::const_use_iterator UI = Arg->use_begin(), UE = Arg->use_end();
- UI != UE; ++UI) {
- const User *U = *UI;
+ for (const User *U : Arg->users())
if (!U->use_empty() || StripPointerCastsAndObjCCalls(U) != Arg)
- return 0;
- }
+ return nullptr;
return Arg;
}
- return 0;
+ return nullptr;
}
/// This is a wrapper around getUnderlyingObjCPtr along the lines of
bool CFGHazardAfflicted;
RRInfo() :
- KnownSafe(false), IsTailCallRelease(false), ReleaseMetadata(0),
+ KnownSafe(false), IsTailCallRelease(false), ReleaseMetadata(nullptr),
CFGHazardAfflicted(false) {}
void clear();
void RRInfo::clear() {
KnownSafe = false;
IsTailCallRelease = false;
- ReleaseMetadata = 0;
+ ReleaseMetadata = nullptr;
Calls.clear();
ReverseInsertPts.clear();
CFGHazardAfflicted = false;
bool RRInfo::Merge(const RRInfo &Other) {
// Conservatively merge the ReleaseMetadata information.
if (ReleaseMetadata != Other.ReleaseMetadata)
- ReleaseMetadata = 0;
+ ReleaseMetadata = nullptr;
// Conservatively merge the boolean state.
KnownSafe &= Other.KnownSafe;
// Merge the insert point sets. If there are any differences,
// that makes this a partial merge.
bool Partial = ReverseInsertPts.size() != Other.ReverseInsertPts.size();
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- I = Other.ReverseInsertPts.begin(),
- E = Other.ReverseInsertPts.end(); I != E; ++I)
- Partial |= ReverseInsertPts.insert(*I);
+ for (Instruction *Inst : Other.ReverseInsertPts)
+ Partial |= ReverseInsertPts.insert(Inst);
return Partial;
}
}
bool IsTrackingImpreciseReleases() const {
- return RRI.ReleaseMetadata != 0;
+ return RRI.ReleaseMetadata != nullptr;
}
const MDNode *GetReleaseMetadata() const {
/// arc annotation processor tool. If the function is an
static MDString *AppendMDNodeToSourcePtr(unsigned NodeId,
Value *Ptr) {
- MDString *Hash = 0;
+ MDString *Hash = nullptr;
// If pointer is a result of an instruction and it does not have a source
// MDNode it, attach a new MDNode onto it. If pointer is a result of
MDString *PtrSourceMDNodeID,
Sequence OldSeq,
Sequence NewSeq) {
- MDNode *Node = 0;
+ MDNode *Node = nullptr;
Value *tmp[3] = {PtrSourceMDNodeID,
SequenceToMDString(Inst->getContext(),
OldSeq),
SequenceToMDString(Inst->getContext(),
NewSeq)};
- Node = MDNode::get(Inst->getContext(),
- ArrayRef<Value*>(tmp, 3));
+ Node = MDNode::get(Inst->getContext(), tmp);
Inst->setMetadata(NodeId, Node);
}
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
Type *I8XX = PointerType::getUnqual(I8X);
Type *Params[] = {I8XX, I8XX};
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(C),
- ArrayRef<Type*>(Params, 2),
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), Params,
/*isVarArg=*/false);
Constant *Callee = M->getOrInsertFunction(Name, FTy);
Value *PtrName;
StringRef Tmp = Ptr->getName();
- if (0 == (PtrName = M->getGlobalVariable(Tmp, true))) {
+ if (nullptr == (PtrName = M->getGlobalVariable(Tmp, true))) {
Value *ActualPtrName = Builder.CreateGlobalStringPtr(Tmp,
Tmp + "_STR");
PtrName = new GlobalVariable(*M, I8X, true, GlobalVariable::InternalLinkage,
Value *S;
std::string SeqStr = SequenceToString(Seq);
- if (0 == (S = M->getGlobalVariable(SeqStr, true))) {
+ if (nullptr == (S = M->getGlobalVariable(SeqStr, true))) {
Value *ActualPtrName = Builder.CreateGlobalStringPtr(SeqStr,
SeqStr + "_STR");
S = new GlobalVariable(*M, I8X, true, GlobalVariable::InternalLinkage,
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
Type *I8XX = PointerType::getUnqual(I8X);
Type *Params[] = {I8XX, I8XX};
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(C),
- ArrayRef<Type*>(Params, 2),
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), Params,
/*isVarArg=*/false);
Constant *Callee = M->getOrInsertFunction(Name, FTy);
Value *PtrName;
StringRef Tmp = Ptr->getName();
- if (0 == (PtrName = M->getGlobalVariable(Tmp, true))) {
+ if (nullptr == (PtrName = M->getGlobalVariable(Tmp, true))) {
Value *ActualPtrName = Builder.CreateGlobalStringPtr(Tmp,
Tmp + "_STR");
PtrName = new GlobalVariable(*M, I8X, true, GlobalVariable::InternalLinkage,
Value *S;
std::string SeqStr = SequenceToString(Seq);
- if (0 == (S = M->getGlobalVariable(SeqStr, true))) {
+ if (nullptr == (S = M->getGlobalVariable(SeqStr, true))) {
Value *ActualPtrName = Builder.CreateGlobalStringPtr(SeqStr,
SeqStr + "_STR");
S = new GlobalVariable(*M, I8X, true, GlobalVariable::InternalLinkage,
Users.push_back(Ptr);
do {
Ptr = Users.pop_back_val();
- for (Value::const_use_iterator UI = Ptr->use_begin(), UE = Ptr->use_end();
- UI != UE; ++UI) {
- const User *I = *UI;
- if (isa<ReturnInst>(I) || GetBasicInstructionClass(I) == IC_RetainRV)
+ for (const User *U : Ptr->users()) {
+ if (isa<ReturnInst>(U) || GetBasicInstructionClass(U) == IC_RetainRV)
return;
- if (isa<BitCastInst>(I))
- Users.push_back(I);
+ if (isa<BitCastInst>(U))
+ Users.push_back(U);
}
} while (!Users.empty());
BBState &MyStates) {
bool NestingDetected = false;
InstructionClass Class = GetInstructionClass(Inst);
- const Value *Arg = 0;
+ const Value *Arg = nullptr;
DEBUG(dbgs() << "Class: " << Class << "\n");
BBState &MyStates) {
bool NestingDetected = false;
InstructionClass Class = GetInstructionClass(Inst);
- const Value *Arg = 0;
+ const Value *Arg = nullptr;
switch (Class) {
case IC_RetainBlock:
switch (OldSeq) {
case S_Retain:
case S_CanRelease:
- if (OldSeq == S_Retain || ReleaseMetadata != 0)
+ if (OldSeq == S_Retain || ReleaseMetadata != nullptr)
S.ClearReverseInsertPts();
// FALL THROUGH
case S_Use:
DEBUG(dbgs() << "== ObjCARCOpt::MoveCalls ==\n");
// Insert the new retain and release calls.
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- PI = ReleasesToMove.ReverseInsertPts.begin(),
- PE = ReleasesToMove.ReverseInsertPts.end(); PI != PE; ++PI) {
- Instruction *InsertPt = *PI;
+ for (Instruction *InsertPt : ReleasesToMove.ReverseInsertPts) {
Value *MyArg = ArgTy == ParamTy ? Arg :
new BitCastInst(Arg, ParamTy, "", InsertPt);
Constant *Decl = EP.get(ARCRuntimeEntryPoints::EPT_Retain);
DEBUG(dbgs() << "Inserting new Retain: " << *Call << "\n"
"At insertion point: " << *InsertPt << "\n");
}
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- PI = RetainsToMove.ReverseInsertPts.begin(),
- PE = RetainsToMove.ReverseInsertPts.end(); PI != PE; ++PI) {
- Instruction *InsertPt = *PI;
+ for (Instruction *InsertPt : RetainsToMove.ReverseInsertPts) {
Value *MyArg = ArgTy == ParamTy ? Arg :
new BitCastInst(Arg, ParamTy, "", InsertPt);
Constant *Decl = EP.get(ARCRuntimeEntryPoints::EPT_Release);
}
// Delete the original retain and release calls.
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- AI = RetainsToMove.Calls.begin(),
- AE = RetainsToMove.Calls.end(); AI != AE; ++AI) {
- Instruction *OrigRetain = *AI;
+ for (Instruction *OrigRetain : RetainsToMove.Calls) {
Retains.blot(OrigRetain);
DeadInsts.push_back(OrigRetain);
DEBUG(dbgs() << "Deleting retain: " << *OrigRetain << "\n");
}
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- AI = ReleasesToMove.Calls.begin(),
- AE = ReleasesToMove.Calls.end(); AI != AE; ++AI) {
- Instruction *OrigRelease = *AI;
+ for (Instruction *OrigRelease : ReleasesToMove.Calls) {
Releases.erase(OrigRelease);
DeadInsts.push_back(OrigRelease);
DEBUG(dbgs() << "Deleting release: " << *OrigRelease << "\n");
KnownSafeTD &= NewRetainRRI.KnownSafe;
MultipleOwners =
MultipleOwners || MultiOwnersSet.count(GetObjCArg(NewRetain));
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- LI = NewRetainRRI.Calls.begin(),
- LE = NewRetainRRI.Calls.end(); LI != LE; ++LI) {
- Instruction *NewRetainRelease = *LI;
+ for (Instruction *NewRetainRelease : NewRetainRRI.Calls) {
DenseMap<Value *, RRInfo>::const_iterator Jt =
Releases.find(NewRetainRelease);
if (Jt == Releases.end())
} else {
if (ReleasesToMove.ReleaseMetadata !=
NewRetainReleaseRRI.ReleaseMetadata)
- ReleasesToMove.ReleaseMetadata = 0;
+ ReleasesToMove.ReleaseMetadata = nullptr;
if (ReleasesToMove.IsTailCallRelease !=
NewRetainReleaseRRI.IsTailCallRelease)
ReleasesToMove.IsTailCallRelease = false;
// Collect the optimal insertion points.
if (!KnownSafe)
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- RI = NewRetainReleaseRRI.ReverseInsertPts.begin(),
- RE = NewRetainReleaseRRI.ReverseInsertPts.end();
- RI != RE; ++RI) {
- Instruction *RIP = *RI;
+ for (Instruction *RIP : NewRetainReleaseRRI.ReverseInsertPts) {
if (ReleasesToMove.ReverseInsertPts.insert(RIP)) {
// If we overflow when we compute the path count, don't
// remove/move anything.
const RRInfo &NewReleaseRRI = It->second;
KnownSafeBU &= NewReleaseRRI.KnownSafe;
CFGHazardAfflicted |= NewReleaseRRI.CFGHazardAfflicted;
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- LI = NewReleaseRRI.Calls.begin(),
- LE = NewReleaseRRI.Calls.end(); LI != LE; ++LI) {
- Instruction *NewReleaseRetain = *LI;
+ for (Instruction *NewReleaseRetain : NewReleaseRRI.Calls) {
MapVector<Value *, RRInfo>::const_iterator Jt =
Retains.find(NewReleaseRetain);
if (Jt == Retains.end())
// Collect the optimal insertion points.
if (!KnownSafe)
- for (SmallPtrSet<Instruction *, 2>::const_iterator
- RI = NewReleaseRetainRRI.ReverseInsertPts.begin(),
- RE = NewReleaseRetainRRI.ReverseInsertPts.end();
- RI != RE; ++RI) {
- Instruction *RIP = *RI;
+ for (Instruction *RIP : NewReleaseRetainRRI.ReverseInsertPts) {
if (RetainsToMove.ReverseInsertPts.insert(RIP)) {
// If we overflow when we compute the path count, don't
// remove/move anything.
CallInst *Call = cast<CallInst>(Inst);
Value *Arg = Call->getArgOperand(0);
if (AllocaInst *Alloca = dyn_cast<AllocaInst>(Arg)) {
- for (Value::use_iterator UI = Alloca->use_begin(),
- UE = Alloca->use_end(); UI != UE; ++UI) {
- const Instruction *UserInst = cast<Instruction>(*UI);
+ for (User *U : Alloca->users()) {
+ const Instruction *UserInst = cast<Instruction>(U);
switch (GetBasicInstructionClass(UserInst)) {
case IC_InitWeak:
case IC_StoreWeak:
}
}
Changed = true;
- for (Value::use_iterator UI = Alloca->use_begin(),
- UE = Alloca->use_end(); UI != UE; ) {
+ for (auto UI = Alloca->user_begin(), UE = Alloca->user_end(); UI != UE;) {
CallInst *UserInst = cast<CallInst>(*UI++);
switch (GetBasicInstructionClass(UserInst)) {
case IC_InitWeak:
/// shared pointer argument. Note that Retain need not be in BB.
static bool
HasSafePathToPredecessorCall(const Value *Arg, Instruction *Retain,
- SmallPtrSet<Instruction *, 4> &DepInsts,
- SmallPtrSet<const BasicBlock *, 4> &Visited,
+ SmallPtrSetImpl<Instruction *> &DepInsts,
+ SmallPtrSetImpl<const BasicBlock *> &Visited,
ProvenanceAnalysis &PA) {
FindDependencies(CanChangeRetainCount, Arg, Retain->getParent(), Retain,
DepInsts, Visited, PA);
static CallInst *
FindPredecessorRetainWithSafePath(const Value *Arg, BasicBlock *BB,
Instruction *Autorelease,
- SmallPtrSet<Instruction *, 4> &DepInsts,
- SmallPtrSet<const BasicBlock *, 4> &Visited,
+ SmallPtrSetImpl<Instruction *> &DepInsts,
+ SmallPtrSetImpl<const BasicBlock *> &Visited,
ProvenanceAnalysis &PA) {
FindDependencies(CanChangeRetainCount, Arg,
BB, Autorelease, DepInsts, Visited, PA);
if (DepInsts.size() != 1)
- return 0;
+ return nullptr;
CallInst *Retain =
dyn_cast_or_null<CallInst>(*DepInsts.begin());
if (!Retain ||
!IsRetain(GetBasicInstructionClass(Retain)) ||
GetObjCArg(Retain) != Arg) {
- return 0;
+ return nullptr;
}
return Retain;
static CallInst *
FindPredecessorAutoreleaseWithSafePath(const Value *Arg, BasicBlock *BB,
ReturnInst *Ret,
- SmallPtrSet<Instruction *, 4> &DepInsts,
- SmallPtrSet<const BasicBlock *, 4> &V,
+ SmallPtrSetImpl<Instruction *> &DepInsts,
+ SmallPtrSetImpl<const BasicBlock *> &V,
ProvenanceAnalysis &PA) {
FindDependencies(NeedsPositiveRetainCount, Arg,
BB, Ret, DepInsts, V, PA);
if (DepInsts.size() != 1)
- return 0;
+ return nullptr;
CallInst *Autorelease =
dyn_cast_or_null<CallInst>(*DepInsts.begin());
if (!Autorelease)
- return 0;
+ return nullptr;
InstructionClass AutoreleaseClass = GetBasicInstructionClass(Autorelease);
if (!IsAutorelease(AutoreleaseClass))
- return 0;
+ return nullptr;
if (GetObjCArg(Autorelease) != Arg)
- return 0;
+ return nullptr;
return Autorelease;
}
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