// If DebugDiv > 0 then only break antidep with (ID % DebugDiv) == DebugMod
static cl::opt<int>
DebugDiv("agg-antidep-debugdiv",
- cl::desc("Debug control for aggressive anti-dep breaker"),
- cl::init(0), cl::Hidden);
+ cl::desc("Debug control for aggressive anti-dep breaker"),
+ cl::init(0), cl::Hidden);
static cl::opt<int>
DebugMod("agg-antidep-debugmod",
- cl::desc("Debug control for aggressive anti-dep breaker"),
- cl::init(0), cl::Hidden);
+ cl::desc("Debug control for aggressive anti-dep breaker"),
+ cl::init(0), cl::Hidden);
AggressiveAntiDepState::AggressiveAntiDepState(const unsigned TargetRegs,
MachineBasicBlock *BB) :
}
void AggressiveAntiDepBreaker::Observe(MachineInstr *MI, unsigned Count,
- unsigned InsertPosIndex) {
+ unsigned InsertPosIndex) {
assert(Count < InsertPosIndex && "Instruction index out of expected range!");
std::set<unsigned> PassthruRegs;
}
bool AggressiveAntiDepBreaker::IsImplicitDefUse(MachineInstr *MI,
- MachineOperand& MO)
+ MachineOperand& MO)
{
if (!MO.isReg() || !MO.isImplicit())
return false;
/// AntiDepEdges - Return in Edges the anti- and output- dependencies
/// in SU that we want to consider for breaking.
-static void AntiDepEdges(SUnit *SU, std::vector<SDep*>& Edges) {
+static void AntiDepEdges(const SUnit *SU, std::vector<const SDep*>& Edges) {
SmallSet<unsigned, 4> RegSet;
- for (SUnit::pred_iterator P = SU->Preds.begin(), PE = SU->Preds.end();
+ for (SUnit::const_pred_iterator P = SU->Preds.begin(), PE = SU->Preds.end();
P != PE; ++P) {
if ((P->getKind() == SDep::Anti) || (P->getKind() == SDep::Output)) {
unsigned Reg = P->getReg();
/// CriticalPathStep - Return the next SUnit after SU on the bottom-up
/// critical path.
-static SUnit *CriticalPathStep(SUnit *SU) {
- SDep *Next = 0;
+static const SUnit *CriticalPathStep(const SUnit *SU) {
+ const SDep *Next = 0;
unsigned NextDepth = 0;
// Find the predecessor edge with the greatest depth.
if (SU != 0) {
- for (SUnit::pred_iterator P = SU->Preds.begin(), PE = SU->Preds.end();
+ for (SUnit::const_pred_iterator P = SU->Preds.begin(), PE = SU->Preds.end();
P != PE; ++P) {
- SUnit *PredSU = P->getSUnit();
+ const SUnit *PredSU = P->getSUnit();
unsigned PredLatency = P->getLatency();
unsigned PredTotalLatency = PredSU->getDepth() + PredLatency;
// In the case of a latency tie, prefer an anti-dependency edge over
void AggressiveAntiDepBreaker::PrescanInstruction(MachineInstr *MI,
unsigned Count,
- std::set<unsigned>& PassthruRegs)
-{
+ std::set<unsigned>& PassthruRegs) {
unsigned *DefIndices = State->GetDefIndices();
std::multimap<unsigned, AggressiveAntiDepState::RegisterReference>&
RegRefs = State->GetRegRefs();
unsigned Reg = MO.getReg();
if (Reg == 0) continue;
// Ignore KILLs and passthru registers for liveness...
- if ((MI->getOpcode() == TargetInstrInfo::KILL) ||
- (PassthruRegs.count(Reg) != 0))
+ if (MI->isKill() || (PassthruRegs.count(Reg) != 0))
continue;
// Update def for Reg and aliases.
}
void AggressiveAntiDepBreaker::ScanInstruction(MachineInstr *MI,
- unsigned Count) {
+ unsigned Count) {
DEBUG(dbgs() << "\tUse Groups:");
std::multimap<unsigned, AggressiveAntiDepState::RegisterReference>&
RegRefs = State->GetRegRefs();
// Form a group of all defs and uses of a KILL instruction to ensure
// that all registers are renamed as a group.
- if (MI->getOpcode() == TargetInstrInfo::KILL) {
+ if (MI->isKill()) {
DEBUG(dbgs() << "\tKill Group:");
unsigned FirstReg = 0;
/// ScheduleDAG and break them by renaming registers.
///
unsigned AggressiveAntiDepBreaker::BreakAntiDependencies(
- std::vector<SUnit>& SUnits,
- MachineBasicBlock::iterator& Begin,
- MachineBasicBlock::iterator& End,
+ const std::vector<SUnit>& SUnits,
+ MachineBasicBlock::iterator Begin,
+ MachineBasicBlock::iterator End,
unsigned InsertPosIndex) {
unsigned *KillIndices = State->GetKillIndices();
unsigned *DefIndices = State->GetDefIndices();
RenameOrderType RenameOrder;
// ...need a map from MI to SUnit.
- std::map<MachineInstr *, SUnit *> MISUnitMap;
+ std::map<MachineInstr *, const SUnit *> MISUnitMap;
for (unsigned i = 0, e = SUnits.size(); i != e; ++i) {
- SUnit *SU = &SUnits[i];
- MISUnitMap.insert(std::pair<MachineInstr *, SUnit *>(SU->getInstr(), SU));
+ const SUnit *SU = &SUnits[i];
+ MISUnitMap.insert(std::pair<MachineInstr *, const SUnit *>(SU->getInstr(),
+ SU));
}
// 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.
- SUnit *CriticalPathSU = 0;
+ const SUnit *CriticalPathSU = 0;
MachineInstr *CriticalPathMI = 0;
if (CriticalPathSet.any()) {
for (unsigned i = 0, e = SUnits.size(); i != e; ++i) {
- SUnit *SU = &SUnits[i];
+ const SUnit *SU = &SUnits[i];
if (!CriticalPathSU ||
((SU->getDepth() + SU->Latency) >
(CriticalPathSU->getDepth() + CriticalPathSU->Latency))) {
// The dependence edges that represent anti- and output-
// dependencies that are candidates for breaking.
- std::vector<SDep*> Edges;
- SUnit *PathSU = MISUnitMap[MI];
+ std::vector<const SDep *> Edges;
+ const SUnit *PathSU = MISUnitMap[MI];
AntiDepEdges(PathSU, Edges);
// If MI is not on the critical path, then we don't rename
// Ignore KILL instructions (they form a group in ScanInstruction
// but don't cause any anti-dependence breaking themselves)
- if (MI->getOpcode() != TargetInstrInfo::KILL) {
+ if (!MI->isKill()) {
// Attempt to break each anti-dependency...
for (unsigned i = 0, e = Edges.size(); i != e; ++i) {
- SDep *Edge = Edges[i];
+ const SDep *Edge = Edges[i];
SUnit *NextSU = Edge->getSUnit();
if ((Edge->getKind() != SDep::Anti) &&
// Also, if there are dependencies on other SUnits with the
// same register as the anti-dependency, don't attempt to
// break it.
- for (SUnit::pred_iterator P = PathSU->Preds.begin(),
+ for (SUnit::const_pred_iterator P = PathSU->Preds.begin(),
PE = PathSU->Preds.end(); P != PE; ++P) {
if (P->getSUnit() == NextSU ?
(P->getKind() != SDep::Anti || P->getReg() != AntiDepReg) :
break;
}
}
- for (SUnit::pred_iterator P = PathSU->Preds.begin(),
+ for (SUnit::const_pred_iterator P = PathSU->Preds.begin(),
PE = PathSU->Preds.end(); P != PE; ++P) {
if ((P->getSUnit() == NextSU) && (P->getKind() != SDep::Anti) &&
(P->getKind() != SDep::Output)) {
projects / oota-llvm.git / blobdiff