mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-22 10:29:35 +00:00
Factor out the SethiUllman numbering logic from the list-burr and
list-tdrr schedulers into a common base class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59701 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
9e76fea3ab
commit
117f3e9ee4
@ -1209,10 +1209,10 @@ static inline bool isCopyFromLiveIn(const SUnit *SU) {
|
||||
N->getOperand(N->getNumOperands()-1).getValueType() != MVT::Flag;
|
||||
}
|
||||
|
||||
/// CalcNodeBUSethiUllmanNumber - Compute Sethi Ullman number for bottom up
|
||||
/// scheduling. Smaller number is the higher priority.
|
||||
/// CalcNodeSethiUllmanNumber - Compute Sethi Ullman number.
|
||||
/// Smaller number is the higher priority.
|
||||
static unsigned
|
||||
CalcNodeBUSethiUllmanNumber(const SUnit *SU, std::vector<unsigned> &SUNumbers) {
|
||||
CalcNodeSethiUllmanNumber(const SUnit *SU, std::vector<unsigned> &SUNumbers) {
|
||||
unsigned &SethiUllmanNumber = SUNumbers[SU->NodeNum];
|
||||
if (SethiUllmanNumber != 0)
|
||||
return SethiUllmanNumber;
|
||||
@ -1222,7 +1222,7 @@ CalcNodeBUSethiUllmanNumber(const SUnit *SU, std::vector<unsigned> &SUNumbers) {
|
||||
I != E; ++I) {
|
||||
if (I->isCtrl) continue; // ignore chain preds
|
||||
SUnit *PredSU = I->Dep;
|
||||
unsigned PredSethiUllman = CalcNodeBUSethiUllmanNumber(PredSU, SUNumbers);
|
||||
unsigned PredSethiUllman = CalcNodeSethiUllmanNumber(PredSU, SUNumbers);
|
||||
if (PredSethiUllman > SethiUllmanNumber) {
|
||||
SethiUllmanNumber = PredSethiUllman;
|
||||
Extra = 0;
|
||||
@ -1238,47 +1238,6 @@ CalcNodeBUSethiUllmanNumber(const SUnit *SU, std::vector<unsigned> &SUNumbers) {
|
||||
return SethiUllmanNumber;
|
||||
}
|
||||
|
||||
/// CalcNodeTDSethiUllmanNumber - Compute Sethi Ullman number for top down
|
||||
/// scheduling. Smaller number is the higher priority.
|
||||
static unsigned
|
||||
CalcNodeTDSethiUllmanNumber(const SUnit *SU, std::vector<unsigned> &SUNumbers) {
|
||||
unsigned &SethiUllmanNumber = SUNumbers[SU->NodeNum];
|
||||
if (SethiUllmanNumber != 0)
|
||||
return SethiUllmanNumber;
|
||||
|
||||
unsigned Opc = SU->getNode() ? SU->getNode()->getOpcode() : 0;
|
||||
if (Opc == ISD::TokenFactor || Opc == ISD::CopyToReg)
|
||||
SethiUllmanNumber = 0xffff;
|
||||
else if (SU->NumSuccsLeft == 0)
|
||||
// If SU does not have a use, i.e. it doesn't produce a value that would
|
||||
// be consumed (e.g. store), then it terminates a chain of computation.
|
||||
// Give it a small SethiUllman number so it will be scheduled right before
|
||||
// its predecessors that it doesn't lengthen their live ranges.
|
||||
SethiUllmanNumber = 0;
|
||||
else if (SU->NumPredsLeft == 0 &&
|
||||
(Opc != ISD::CopyFromReg || isCopyFromLiveIn(SU)))
|
||||
SethiUllmanNumber = 0xffff;
|
||||
else {
|
||||
int Extra = 0;
|
||||
for (SUnit::const_pred_iterator I = SU->Preds.begin(), E = SU->Preds.end();
|
||||
I != E; ++I) {
|
||||
if (I->isCtrl) continue; // ignore chain preds
|
||||
SUnit *PredSU = I->Dep;
|
||||
unsigned PredSethiUllman = CalcNodeTDSethiUllmanNumber(PredSU, SUNumbers);
|
||||
if (PredSethiUllman > SethiUllmanNumber) {
|
||||
SethiUllmanNumber = PredSethiUllman;
|
||||
Extra = 0;
|
||||
} else if (PredSethiUllman == SethiUllmanNumber && !I->isCtrl)
|
||||
++Extra;
|
||||
}
|
||||
|
||||
SethiUllmanNumber += Extra;
|
||||
}
|
||||
|
||||
return SethiUllmanNumber;
|
||||
}
|
||||
|
||||
|
||||
namespace {
|
||||
template<class SF>
|
||||
class VISIBILITY_HIDDEN RegReductionPriorityQueue
|
||||
@ -1294,6 +1253,9 @@ namespace {
|
||||
const TargetRegisterInfo *TRI;
|
||||
ScheduleDAGRRList *scheduleDAG;
|
||||
|
||||
// SethiUllmanNumbers - The SethiUllman number for each node.
|
||||
std::vector<unsigned> SethiUllmanNumbers;
|
||||
|
||||
public:
|
||||
RegReductionPriorityQueue(const TargetInstrInfo *tii,
|
||||
const TargetRegisterInfo *tri) :
|
||||
@ -1302,17 +1264,59 @@ namespace {
|
||||
|
||||
void initNodes(std::vector<SUnit> &sunits) {
|
||||
SUnits = &sunits;
|
||||
// Add pseudo dependency edges for two-address nodes.
|
||||
AddPseudoTwoAddrDeps();
|
||||
// Calculate node priorities.
|
||||
CalculateSethiUllmanNumbers();
|
||||
}
|
||||
|
||||
virtual void addNode(const SUnit *SU) = 0;
|
||||
void addNode(const SUnit *SU) {
|
||||
unsigned SUSize = SethiUllmanNumbers.size();
|
||||
if (SUnits->size() > SUSize)
|
||||
SethiUllmanNumbers.resize(SUSize*2, 0);
|
||||
CalcNodeSethiUllmanNumber(SU, SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
virtual void updateNode(const SUnit *SU) = 0;
|
||||
void updateNode(const SUnit *SU) {
|
||||
SethiUllmanNumbers[SU->NodeNum] = 0;
|
||||
CalcNodeSethiUllmanNumber(SU, SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
virtual void releaseState() {
|
||||
void releaseState() {
|
||||
SUnits = 0;
|
||||
SethiUllmanNumbers.clear();
|
||||
}
|
||||
|
||||
unsigned getNodePriority(const SUnit *SU) const {
|
||||
assert(SU->NodeNum < SethiUllmanNumbers.size());
|
||||
unsigned Opc = SU->getNode() ? SU->getNode()->getOpcode() : 0;
|
||||
if (Opc == ISD::CopyFromReg && !isCopyFromLiveIn(SU))
|
||||
// CopyFromReg should be close to its def because it restricts
|
||||
// allocation choices. But if it is a livein then perhaps we want it
|
||||
// closer to its uses so it can be coalesced.
|
||||
return 0xffff;
|
||||
else if (Opc == ISD::TokenFactor || Opc == ISD::CopyToReg)
|
||||
// CopyToReg should be close to its uses to facilitate coalescing and
|
||||
// avoid spilling.
|
||||
return 0;
|
||||
else if (Opc == TargetInstrInfo::EXTRACT_SUBREG ||
|
||||
Opc == TargetInstrInfo::INSERT_SUBREG)
|
||||
// EXTRACT_SUBREG / INSERT_SUBREG should be close to its use to
|
||||
// facilitate coalescing.
|
||||
return 0;
|
||||
else if (SU->NumSuccs == 0)
|
||||
// If SU does not have a use, i.e. it doesn't produce a value that would
|
||||
// be consumed (e.g. store), then it terminates a chain of computation.
|
||||
// Give it a large SethiUllman number so it will be scheduled right
|
||||
// before its predecessors that it doesn't lengthen their live ranges.
|
||||
return 0xffff;
|
||||
else if (SU->NumPreds == 0)
|
||||
// If SU does not have a def, schedule it close to its uses because it
|
||||
// does not lengthen any live ranges.
|
||||
return 0;
|
||||
else
|
||||
return SethiUllmanNumbers[SU->NodeNum];
|
||||
}
|
||||
|
||||
virtual unsigned getNodePriority(const SUnit *SU) const = 0;
|
||||
|
||||
unsigned size() const { return Queue.size(); }
|
||||
|
||||
@ -1351,122 +1355,14 @@ namespace {
|
||||
protected:
|
||||
bool canClobber(const SUnit *SU, const SUnit *Op);
|
||||
void AddPseudoTwoAddrDeps();
|
||||
};
|
||||
|
||||
class VISIBILITY_HIDDEN BURegReductionPriorityQueue
|
||||
: public RegReductionPriorityQueue<bu_ls_rr_sort> {
|
||||
// SethiUllmanNumbers - The SethiUllman number for each node.
|
||||
std::vector<unsigned> SethiUllmanNumbers;
|
||||
|
||||
public:
|
||||
BURegReductionPriorityQueue(const TargetInstrInfo *tii,
|
||||
const TargetRegisterInfo *tri)
|
||||
: RegReductionPriorityQueue<bu_ls_rr_sort>(tii, tri) {}
|
||||
|
||||
void initNodes(std::vector<SUnit> &sunits) {
|
||||
RegReductionPriorityQueue<bu_ls_rr_sort>::initNodes(sunits);
|
||||
// Add pseudo dependency edges for two-address nodes.
|
||||
AddPseudoTwoAddrDeps();
|
||||
// Calculate node priorities.
|
||||
CalculateSethiUllmanNumbers();
|
||||
}
|
||||
|
||||
void addNode(const SUnit *SU) {
|
||||
unsigned SUSize = SethiUllmanNumbers.size();
|
||||
if (SUnits->size() > SUSize)
|
||||
SethiUllmanNumbers.resize(SUSize*2, 0);
|
||||
CalcNodeBUSethiUllmanNumber(SU, SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
void updateNode(const SUnit *SU) {
|
||||
SethiUllmanNumbers[SU->NodeNum] = 0;
|
||||
CalcNodeBUSethiUllmanNumber(SU, SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
void releaseState() {
|
||||
RegReductionPriorityQueue<bu_ls_rr_sort>::releaseState();
|
||||
SethiUllmanNumbers.clear();
|
||||
}
|
||||
|
||||
unsigned getNodePriority(const SUnit *SU) const {
|
||||
assert(SU->NodeNum < SethiUllmanNumbers.size());
|
||||
unsigned Opc = SU->getNode() ? SU->getNode()->getOpcode() : 0;
|
||||
if (Opc == ISD::CopyFromReg && !isCopyFromLiveIn(SU))
|
||||
// CopyFromReg should be close to its def because it restricts
|
||||
// allocation choices. But if it is a livein then perhaps we want it
|
||||
// closer to its uses so it can be coalesced.
|
||||
return 0xffff;
|
||||
else if (Opc == ISD::TokenFactor || Opc == ISD::CopyToReg)
|
||||
// CopyToReg should be close to its uses to facilitate coalescing and
|
||||
// avoid spilling.
|
||||
return 0;
|
||||
else if (Opc == TargetInstrInfo::EXTRACT_SUBREG ||
|
||||
Opc == TargetInstrInfo::INSERT_SUBREG)
|
||||
// EXTRACT_SUBREG / INSERT_SUBREG should be close to its use to
|
||||
// facilitate coalescing.
|
||||
return 0;
|
||||
else if (SU->NumSuccs == 0)
|
||||
// If SU does not have a use, i.e. it doesn't produce a value that would
|
||||
// be consumed (e.g. store), then it terminates a chain of computation.
|
||||
// Give it a large SethiUllman number so it will be scheduled right
|
||||
// before its predecessors that it doesn't lengthen their live ranges.
|
||||
return 0xffff;
|
||||
else if (SU->NumPreds == 0)
|
||||
// If SU does not have a def, schedule it close to its uses because it
|
||||
// does not lengthen any live ranges.
|
||||
return 0;
|
||||
else
|
||||
return SethiUllmanNumbers[SU->NodeNum];
|
||||
}
|
||||
|
||||
private:
|
||||
void CalculateSethiUllmanNumbers();
|
||||
};
|
||||
|
||||
typedef RegReductionPriorityQueue<bu_ls_rr_sort>
|
||||
BURegReductionPriorityQueue;
|
||||
|
||||
class VISIBILITY_HIDDEN TDRegReductionPriorityQueue
|
||||
: public RegReductionPriorityQueue<td_ls_rr_sort> {
|
||||
// SethiUllmanNumbers - The SethiUllman number for each node.
|
||||
std::vector<unsigned> SethiUllmanNumbers;
|
||||
|
||||
public:
|
||||
TDRegReductionPriorityQueue(const TargetInstrInfo *tii,
|
||||
const TargetRegisterInfo *tri)
|
||||
: RegReductionPriorityQueue<td_ls_rr_sort>(tii, tri) {}
|
||||
|
||||
void initNodes(std::vector<SUnit> &sunits) {
|
||||
RegReductionPriorityQueue<td_ls_rr_sort>::initNodes(sunits);
|
||||
// Add pseudo dependency edges for two-address nodes.
|
||||
AddPseudoTwoAddrDeps();
|
||||
// Calculate node priorities.
|
||||
CalculateSethiUllmanNumbers();
|
||||
}
|
||||
|
||||
void addNode(const SUnit *SU) {
|
||||
unsigned SUSize = SethiUllmanNumbers.size();
|
||||
if (SUnits->size() > SUSize)
|
||||
SethiUllmanNumbers.resize(SUSize*2, 0);
|
||||
CalcNodeTDSethiUllmanNumber(SU, SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
void updateNode(const SUnit *SU) {
|
||||
SethiUllmanNumbers[SU->NodeNum] = 0;
|
||||
CalcNodeTDSethiUllmanNumber(SU, SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
void releaseState() {
|
||||
RegReductionPriorityQueue<td_ls_rr_sort>::releaseState();
|
||||
SethiUllmanNumbers.clear();
|
||||
}
|
||||
|
||||
unsigned getNodePriority(const SUnit *SU) const {
|
||||
assert(SU->NodeNum < SethiUllmanNumbers.size());
|
||||
return SethiUllmanNumbers[SU->NodeNum];
|
||||
}
|
||||
|
||||
private:
|
||||
void CalculateSethiUllmanNumbers();
|
||||
};
|
||||
typedef RegReductionPriorityQueue<td_ls_rr_sort>
|
||||
TDRegReductionPriorityQueue;
|
||||
}
|
||||
|
||||
/// closestSucc - Returns the scheduled cycle of the successor which is
|
||||
@ -1701,11 +1597,12 @@ void RegReductionPriorityQueue<SF>::AddPseudoTwoAddrDeps() {
|
||||
|
||||
/// CalculateSethiUllmanNumbers - Calculate Sethi-Ullman numbers of all
|
||||
/// scheduling units.
|
||||
void BURegReductionPriorityQueue::CalculateSethiUllmanNumbers() {
|
||||
template<class SF>
|
||||
void RegReductionPriorityQueue<SF>::CalculateSethiUllmanNumbers() {
|
||||
SethiUllmanNumbers.assign(SUnits->size(), 0);
|
||||
|
||||
for (unsigned i = 0, e = SUnits->size(); i != e; ++i)
|
||||
CalcNodeBUSethiUllmanNumber(&(*SUnits)[i], SethiUllmanNumbers);
|
||||
CalcNodeSethiUllmanNumber(&(*SUnits)[i], SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
/// LimitedSumOfUnscheduledPredsOfSuccs - Compute the sum of the unscheduled
|
||||
@ -1771,15 +1668,6 @@ bool td_ls_rr_sort::operator()(const SUnit *left, const SUnit *right) const {
|
||||
return (left->NodeQueueId > right->NodeQueueId);
|
||||
}
|
||||
|
||||
/// CalculateSethiUllmanNumbers - Calculate Sethi-Ullman numbers of all
|
||||
/// scheduling units.
|
||||
void TDRegReductionPriorityQueue::CalculateSethiUllmanNumbers() {
|
||||
SethiUllmanNumbers.assign(SUnits->size(), 0);
|
||||
|
||||
for (unsigned i = 0, e = SUnits->size(); i != e; ++i)
|
||||
CalcNodeTDSethiUllmanNumber(&(*SUnits)[i], SethiUllmanNumbers);
|
||||
}
|
||||
|
||||
//===----------------------------------------------------------------------===//
|
||||
// Public Constructor Functions
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
Loading…
Reference in New Issue
Block a user