//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "pre-RA-sched"
-#include "ScheduleDAGSDNodes.h"
-#include "InstrEmitter.h"
-#include "llvm/InlineAsm.h"
#include "llvm/CodeGen/SchedulerRegistry.h"
-#include "llvm/CodeGen/SelectionDAGISel.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/DataLayout.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Support/Debug.h"
+#include "InstrEmitter.h"
+#include "ScheduleDAGSDNodes.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/STLExtras.h"
+#include "llvm/CodeGen/SelectionDAGISel.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/InlineAsm.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
+#define DEBUG_TYPE "pre-RA-sched"
+
STATISTIC(NumUnfolds, "Number of nodes unfolded");
STATISTIC(NumDups, "Number of duplicated nodes");
STATISTIC(NumPRCopies, "Number of physical copies");
}
SUnit *pop() {
- if (empty()) return NULL;
+ if (empty()) return nullptr;
SUnit *V = Queue.back();
Queue.pop_back();
return V;
ScheduleDAGFast(MachineFunction &mf)
: ScheduleDAGSDNodes(mf) {}
- void Schedule();
+ void Schedule() override;
/// AddPred - adds a predecessor edge to SUnit SU.
/// This returns true if this is a new predecessor.
void InsertCopiesAndMoveSuccs(SUnit*, unsigned,
const TargetRegisterClass*,
const TargetRegisterClass*,
- SmallVector<SUnit*, 2>&);
- bool DelayForLiveRegsBottomUp(SUnit*, SmallVector<unsigned, 4>&);
+ SmallVectorImpl<SUnit*>&);
+ bool DelayForLiveRegsBottomUp(SUnit*, SmallVectorImpl<unsigned>&);
void ListScheduleBottomUp();
/// forceUnitLatencies - The fast scheduler doesn't care about real latencies.
- bool forceUnitLatencies() const { return true; }
+ bool forceUnitLatencies() const override { return true; }
};
} // end anonymous namespace
DEBUG(dbgs() << "********** List Scheduling **********\n");
NumLiveRegs = 0;
- LiveRegDefs.resize(TRI->getNumRegs(), NULL);
+ LiveRegDefs.resize(TRI->getNumRegs(), nullptr);
LiveRegCycles.resize(TRI->getNumRegs(), 0);
// Build the scheduling graph.
- BuildSchedGraph(NULL);
+ BuildSchedGraph(nullptr);
DEBUG(for (unsigned su = 0, e = SUnits.size(); su != e; ++su)
SUnits[su].dumpAll(this));
dbgs() << "*** Scheduling failed! ***\n";
PredSU->dump(this);
dbgs() << " has been released too many times!\n";
- llvm_unreachable(0);
+ llvm_unreachable(nullptr);
}
#endif
--PredSU->NumSuccsLeft;
assert(LiveRegDefs[I->getReg()] == SU &&
"Physical register dependency violated?");
--NumLiveRegs;
- LiveRegDefs[I->getReg()] = NULL;
+ LiveRegDefs[I->getReg()] = nullptr;
LiveRegCycles[I->getReg()] = 0;
}
}
/// successors to the newly created node.
SUnit *ScheduleDAGFast::CopyAndMoveSuccessors(SUnit *SU) {
if (SU->getNode()->getGluedNode())
- return NULL;
+ return nullptr;
SDNode *N = SU->getNode();
if (!N)
- return NULL;
+ return nullptr;
SUnit *NewSU;
bool TryUnfold = false;
for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) {
EVT VT = N->getValueType(i);
if (VT == MVT::Glue)
- return NULL;
+ return nullptr;
else if (VT == MVT::Other)
TryUnfold = true;
}
const SDValue &Op = N->getOperand(i);
EVT VT = Op.getNode()->getValueType(Op.getResNo());
if (VT == MVT::Glue)
- return NULL;
+ return nullptr;
}
if (TryUnfold) {
SmallVector<SDNode*, 2> NewNodes;
if (!TII->unfoldMemoryOperand(*DAG, N, NewNodes))
- return NULL;
+ return nullptr;
DEBUG(dbgs() << "Unfolding SU # " << SU->NodeNum << "\n");
assert(NewNodes.size() == 2 && "Expected a load folding node!");
}
}
if (isNewLoad) {
- AddPred(NewSU, SDep(LoadSU, SDep::Order, LoadSU->Latency));
+ SDep D(LoadSU, SDep::Barrier);
+ D.setLatency(LoadSU->Latency);
+ AddPred(NewSU, D);
}
++NumUnfolds;
void ScheduleDAGFast::InsertCopiesAndMoveSuccs(SUnit *SU, unsigned Reg,
const TargetRegisterClass *DestRC,
const TargetRegisterClass *SrcRC,
- SmallVector<SUnit*, 2> &Copies) {
- SUnit *CopyFromSU = newSUnit(static_cast<SDNode *>(NULL));
+ SmallVectorImpl<SUnit*> &Copies) {
+ SUnit *CopyFromSU = newSUnit(static_cast<SDNode *>(nullptr));
CopyFromSU->CopySrcRC = SrcRC;
CopyFromSU->CopyDstRC = DestRC;
- SUnit *CopyToSU = newSUnit(static_cast<SDNode *>(NULL));
+ SUnit *CopyToSU = newSUnit(static_cast<SDNode *>(nullptr));
CopyToSU->CopySrcRC = DestRC;
CopyToSU->CopyDstRC = SrcRC;
for (unsigned i = 0, e = DelDeps.size(); i != e; ++i) {
RemovePred(DelDeps[i].first, DelDeps[i].second);
}
-
- AddPred(CopyFromSU, SDep(SU, SDep::Data, SU->Latency, Reg));
- AddPred(CopyToSU, SDep(CopyFromSU, SDep::Data, CopyFromSU->Latency, 0));
+ SDep FromDep(SU, SDep::Data, Reg);
+ FromDep.setLatency(SU->Latency);
+ AddPred(CopyFromSU, FromDep);
+ SDep ToDep(CopyFromSU, SDep::Data, 0);
+ ToDep.setLatency(CopyFromSU->Latency);
+ AddPred(CopyToSU, ToDep);
Copies.push_back(CopyFromSU);
Copies.push_back(CopyToSU);
static bool CheckForLiveRegDef(SUnit *SU, unsigned Reg,
std::vector<SUnit*> &LiveRegDefs,
SmallSet<unsigned, 4> &RegAdded,
- SmallVector<unsigned, 4> &LRegs,
+ SmallVectorImpl<unsigned> &LRegs,
const TargetRegisterInfo *TRI) {
bool Added = false;
for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) {
/// If the specific node is the last one that's available to schedule, do
/// whatever is necessary (i.e. backtracking or cloning) to make it possible.
bool ScheduleDAGFast::DelayForLiveRegsBottomUp(SUnit *SU,
- SmallVector<unsigned, 4> &LRegs){
+ SmallVectorImpl<unsigned> &LRegs){
if (NumLiveRegs == 0)
return false;
// "expensive to copy" values to break the dependency. In case even
// that doesn't work, insert cross class copies.
SUnit *TrySU = NotReady[0];
- SmallVector<unsigned, 4> &LRegs = LRegsMap[TrySU];
+ SmallVectorImpl<unsigned> &LRegs = LRegsMap[TrySU];
assert(LRegs.size() == 1 && "Can't handle this yet!");
unsigned Reg = LRegs[0];
SUnit *LRDef = LiveRegDefs[Reg];
// and it is expensive.
// If cross copy register class is null, then it's not possible to copy
// the value at all.
- SUnit *NewDef = 0;
+ SUnit *NewDef = nullptr;
if (DestRC != RC) {
NewDef = CopyAndMoveSuccessors(LRDef);
if (!DestRC && !NewDef)
InsertCopiesAndMoveSuccs(LRDef, Reg, DestRC, RC, Copies);
DEBUG(dbgs() << "Adding an edge from SU # " << TrySU->NodeNum
<< " to SU #" << Copies.front()->NodeNum << "\n");
- AddPred(TrySU, SDep(Copies.front(), SDep::Order, /*Latency=*/1,
- /*Reg=*/0, /*isNormalMemory=*/false,
- /*isMustAlias=*/false, /*isArtificial=*/true));
+ AddPred(TrySU, SDep(Copies.front(), SDep::Artificial));
NewDef = Copies.back();
}
DEBUG(dbgs() << "Adding an edge from SU # " << NewDef->NodeNum
<< " to SU #" << TrySU->NodeNum << "\n");
LiveRegDefs[Reg] = NewDef;
- AddPred(NewDef, SDep(TrySU, SDep::Order, /*Latency=*/1,
- /*Reg=*/0, /*isNormalMemory=*/false,
- /*isMustAlias=*/false, /*isArtificial=*/true));
+ AddPred(NewDef, SDep(TrySU, SDep::Artificial));
TrySU->isAvailable = false;
CurSU = NewDef;
}
}
+namespace {
//===----------------------------------------------------------------------===//
// ScheduleDAGLinearize - No scheduling scheduler, it simply linearize the
// DAG in topological order.
public:
ScheduleDAGLinearize(MachineFunction &mf) : ScheduleDAGSDNodes(mf) {}
- void Schedule();
+ void Schedule() override;
- MachineBasicBlock *EmitSchedule(MachineBasicBlock::iterator &InsertPos);
+ MachineBasicBlock *
+ EmitSchedule(MachineBasicBlock::iterator &InsertPos) override;
private:
std::vector<SDNode*> Sequence;
void ScheduleNode(SDNode *N);
};
+} // end anonymous namespace
void ScheduleDAGLinearize::ScheduleNode(SDNode *N) {
if (N->getNodeId() != 0)
- llvm_unreachable(0);
+ llvm_unreachable(nullptr);
if (!N->isMachineOpcode() &&
(N->getOpcode() == ISD::EntryToken || isPassiveNode(N)))
unsigned NumOps = N->getNumOperands();
if (unsigned NumLeft = NumOps) {
- SDNode *GluedOpN = 0;
+ SDNode *GluedOpN = nullptr;
do {
const SDValue &Op = N->getOperand(NumLeft-1);
SDNode *OpN = Op.getNode();
projects / oota-llvm.git / blobdiff