[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.
llvm-svn: 206142
diff --git a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
index c33b32d..7990f3f 100644
--- a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
+++ b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
@@ -121,7 +121,7 @@
TII(MF.getTarget().getInstrInfo()),
TRI(MF.getTarget().getRegisterInfo()),
RegClassInfo(RCI),
- State(NULL) {
+ State(nullptr) {
/* Collect a bitset of all registers that are only broken if they
are on the critical path. */
for (unsigned i = 0, e = CriticalPathRCs.size(); i < e; ++i) {
@@ -144,7 +144,7 @@
}
void AggressiveAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
- assert(State == NULL);
+ assert(!State);
State = new AggressiveAntiDepState(TRI->getNumRegs(), BB);
bool IsReturnBlock = (!BB->empty() && BB->back().isReturn());
@@ -183,7 +183,7 @@
void AggressiveAntiDepBreaker::FinishBlock() {
delete State;
- State = NULL;
+ State = nullptr;
}
void AggressiveAntiDepBreaker::Observe(MachineInstr *MI, unsigned Count,
@@ -230,13 +230,13 @@
if (Reg == 0)
return false;
- MachineOperand *Op = NULL;
+ MachineOperand *Op = nullptr;
if (MO.isDef())
Op = MI->findRegisterUseOperand(Reg, true);
else
Op = MI->findRegisterDefOperand(Reg);
- return((Op != NULL) && Op->isImplicit());
+ return(Op && Op->isImplicit());
}
void AggressiveAntiDepBreaker::GetPassthruRegs(MachineInstr *MI,
@@ -273,10 +273,10 @@
/// CriticalPathStep - Return the next SUnit after SU on the bottom-up
/// critical path.
static const SUnit *CriticalPathStep(const SUnit *SU) {
- const SDep *Next = 0;
+ const SDep *Next = nullptr;
unsigned NextDepth = 0;
// Find the predecessor edge with the greatest depth.
- if (SU != 0) {
+ if (SU) {
for (SUnit::const_pred_iterator P = SU->Preds.begin(), PE = SU->Preds.end();
P != PE; ++P) {
const SUnit *PredSU = P->getSUnit();
@@ -292,7 +292,7 @@
}
}
- return (Next) ? Next->getSUnit() : 0;
+ return (Next) ? Next->getSUnit() : nullptr;
}
void AggressiveAntiDepBreaker::HandleLastUse(unsigned Reg, unsigned KillIdx,
@@ -309,8 +309,8 @@
DefIndices[Reg] = ~0u;
RegRefs.erase(Reg);
State->LeaveGroup(Reg);
- DEBUG(if (header != NULL) {
- dbgs() << header << TRI->getName(Reg); header = NULL; });
+ DEBUG(if (header) {
+ dbgs() << header << TRI->getName(Reg); header = nullptr; });
DEBUG(dbgs() << "->g" << State->GetGroup(Reg) << tag);
}
// Repeat for subregisters.
@@ -321,14 +321,14 @@
DefIndices[SubregReg] = ~0u;
RegRefs.erase(SubregReg);
State->LeaveGroup(SubregReg);
- DEBUG(if (header != NULL) {
- dbgs() << header << TRI->getName(Reg); header = NULL; });
+ DEBUG(if (header) {
+ dbgs() << header << TRI->getName(Reg); header = nullptr; });
DEBUG(dbgs() << " " << TRI->getName(SubregReg) << "->g" <<
State->GetGroup(SubregReg) << tag);
}
}
- DEBUG(if ((header == NULL) && (footer != NULL)) dbgs() << footer);
+ DEBUG(if (!header && footer) dbgs() << footer);
}
void AggressiveAntiDepBreaker::PrescanInstruction(MachineInstr *MI,
@@ -382,7 +382,7 @@
}
// Note register reference...
- const TargetRegisterClass *RC = NULL;
+ const TargetRegisterClass *RC = nullptr;
if (i < MI->getDesc().getNumOperands())
RC = TII->getRegClass(MI->getDesc(), i, TRI, MF);
AggressiveAntiDepState::RegisterReference RR = { &MO, RC };
@@ -466,7 +466,7 @@
}
// Note register reference...
- const TargetRegisterClass *RC = NULL;
+ const TargetRegisterClass *RC = nullptr;
if (i < MI->getDesc().getNumOperands())
RC = TII->getRegClass(MI->getDesc(), i, TRI, MF);
AggressiveAntiDepState::RegisterReference RR = { &MO, RC };
@@ -516,7 +516,7 @@
AggressiveAntiDepState::RegisterReference>::iterator Q = Range.first,
QE = Range.second; Q != QE; ++Q) {
const TargetRegisterClass *RC = Q->second.RC;
- if (RC == NULL) continue;
+ if (!RC) continue;
BitVector RCBV = TRI->getAllocatableSet(MF, RC);
if (first) {
@@ -734,8 +734,8 @@
// Track progress along the critical path through the SUnit graph as
// we walk the instructions. This is needed for regclasses that only
// break critical-path anti-dependencies.
- const SUnit *CriticalPathSU = 0;
- MachineInstr *CriticalPathMI = 0;
+ const SUnit *CriticalPathSU = nullptr;
+ MachineInstr *CriticalPathMI = nullptr;
if (CriticalPathSet.any()) {
for (unsigned i = 0, e = SUnits.size(); i != e; ++i) {
const SUnit *SU = &SUnits[i];
@@ -788,10 +788,10 @@
// If MI is not on the critical path, then we don't rename
// registers in the CriticalPathSet.
- BitVector *ExcludeRegs = NULL;
+ BitVector *ExcludeRegs = nullptr;
if (MI == CriticalPathMI) {
CriticalPathSU = CriticalPathStep(CriticalPathSU);
- CriticalPathMI = (CriticalPathSU) ? CriticalPathSU->getInstr() : 0;
+ CriticalPathMI = (CriticalPathSU) ? CriticalPathSU->getInstr() : nullptr;
} else if (CriticalPathSet.any()) {
ExcludeRegs = &CriticalPathSet;
}
@@ -815,7 +815,7 @@
// Don't break anti-dependencies on non-allocatable registers.
DEBUG(dbgs() << " (non-allocatable)\n");
continue;
- } else if ((ExcludeRegs != NULL) && ExcludeRegs->test(AntiDepReg)) {
+ } else if (ExcludeRegs && ExcludeRegs->test(AntiDepReg)) {
// Don't break anti-dependencies for critical path registers
// if not on the critical path
DEBUG(dbgs() << " (not critical-path)\n");
@@ -829,9 +829,8 @@
} else {
// No anti-dep breaking for implicit deps
MachineOperand *AntiDepOp = MI->findRegisterDefOperand(AntiDepReg);
- assert(AntiDepOp != NULL &&
- "Can't find index for defined register operand");
- if ((AntiDepOp == NULL) || AntiDepOp->isImplicit()) {
+ assert(AntiDepOp && "Can't find index for defined register operand");
+ if (!AntiDepOp || AntiDepOp->isImplicit()) {
DEBUG(dbgs() << " (implicit)\n");
continue;
}