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Pass BranchProbability/BlockMass by value instead of const& as they are small. NFC.

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llvm-svn: 247357
This commit is contained in:
Cong Hou 2015-09-10 23:10:42 +00:00
parent b3a586f07f
commit 16bf52a24c
17 changed files with 64 additions and 65 deletions
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28
include/llvm/Analysis/BlockFrequencyInfoImpl.h
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@ -84,7 +84,7 @@ public:
/// \brief Add another mass.
///
/// Adds another mass, saturating at \a isFull() rather than overflowing.
BlockMass &operator+=(const BlockMass &X) {
BlockMass &operator+=(BlockMass X) {
uint64_t Sum = Mass + X.Mass;
Mass = Sum < Mass ? UINT64_MAX : Sum;
return *this;
@ -94,23 +94,23 @@ public:
///
/// Subtracts another mass, saturating at \a isEmpty() rather than
/// undeflowing.
BlockMass &operator-=(const BlockMass &X) {
BlockMass &operator-=(BlockMass X) {
uint64_t Diff = Mass - X.Mass;
Mass = Diff > Mass ? 0 : Diff;
return *this;
}
BlockMass &operator*=(const BranchProbability &P) {
BlockMass &operator*=(BranchProbability P) {
Mass = P.scale(Mass);
return *this;
}
bool operator==(const BlockMass &X) const { return Mass == X.Mass; }
bool operator!=(const BlockMass &X) const { return Mass != X.Mass; }
bool operator<=(const BlockMass &X) const { return Mass <= X.Mass; }
bool operator>=(const BlockMass &X) const { return Mass >= X.Mass; }
bool operator<(const BlockMass &X) const { return Mass < X.Mass; }
bool operator>(const BlockMass &X) const { return Mass > X.Mass; }
bool operator==(BlockMass X) const { return Mass == X.Mass; }
bool operator!=(BlockMass X) const { return Mass != X.Mass; }
bool operator<=(BlockMass X) const { return Mass <= X.Mass; }
bool operator>=(BlockMass X) const { return Mass >= X.Mass; }
bool operator<(BlockMass X) const { return Mass < X.Mass; }
bool operator>(BlockMass X) const { return Mass > X.Mass; }
/// \brief Convert to scaled number.
///
@ -122,20 +122,20 @@ public:
raw_ostream &print(raw_ostream &OS) const;
};
inline BlockMass operator+(const BlockMass &L, const BlockMass &R) {
inline BlockMass operator+(BlockMass L, BlockMass R) {
return BlockMass(L) += R;
}
inline BlockMass operator-(const BlockMass &L, const BlockMass &R) {
inline BlockMass operator-(BlockMass L, BlockMass R) {
return BlockMass(L) -= R;
}
inline BlockMass operator*(const BlockMass &L, const BranchProbability &R) {
inline BlockMass operator*(BlockMass L, BranchProbability R) {
return BlockMass(L) *= R;
}
inline BlockMass operator*(const BranchProbability &L, const BlockMass &R) {
inline BlockMass operator*(BranchProbability L, BlockMass R) {
return BlockMass(R) *= L;
}
inline raw_ostream &operator<<(raw_ostream &OS, const BlockMass &X) {
inline raw_ostream &operator<<(raw_ostream &OS, BlockMass X) {
return X.print(OS);
}

8
include/llvm/Support/BlockFrequency.h
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@ -37,13 +37,13 @@ public:
/// \brief Multiplies with a branch probability. The computation will never
/// overflow.
BlockFrequency &operator*=(const BranchProbability &Prob);
const BlockFrequency operator*(const BranchProbability &Prob) const;
BlockFrequency &operator*=(BranchProbability Prob);
const BlockFrequency operator*(BranchProbability Prob) const;
/// \brief Divide by a non-zero branch probability using saturating
/// arithmetic.
BlockFrequency &operator/=(const BranchProbability &Prob);
BlockFrequency operator/(const BranchProbability &Prob) const;
BlockFrequency &operator/=(BranchProbability Prob);
BlockFrequency operator/(BranchProbability Prob) const;
/// \brief Adds another block frequency using saturating arithmetic.
BlockFrequency &operator+=(const BlockFrequency &Freq);

9
include/llvm/Support/BranchProbability.h
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@ -30,9 +30,10 @@ class BranchProbability {
uint32_t D;
public:
BranchProbability(uint32_t n, uint32_t d) : N(n), D(d) {
assert(d > 0 && "Denominator cannot be 0!");
assert(n <= d && "Probability cannot be bigger than 1!");
BranchProbability(uint32_t Numerator, uint32_t Denominator)
: N(Numerator), D(Denominator) {
assert(D > 0 && "Denominator cannot be 0!");
assert(N <= D && "Probability cannot be bigger than 1!");
}
static BranchProbability getZero() { return BranchProbability(0, 1); }
@ -80,7 +81,7 @@ public:
bool operator>=(BranchProbability RHS) const { return !(*this < RHS); }
};
inline raw_ostream &operator<<(raw_ostream &OS, const BranchProbability &Prob) {
inline raw_ostream &operator<<(raw_ostream &OS, BranchProbability Prob) {
return Prob.print(OS);
}

8
include/llvm/Target/TargetInstrInfo.h
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@ -19,6 +19,7 @@
#include "llvm/CodeGen/MachineCombinerPattern.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/Support/BranchProbability.h"
#include "llvm/Target/TargetRegisterInfo.h"
namespace llvm {
@ -38,7 +39,6 @@ class SelectionDAG;
class ScheduleDAG;
class TargetRegisterClass;
class TargetRegisterInfo;
class BranchProbability;
class TargetSubtargetInfo;
class TargetSchedModel;
class DFAPacketizer;
@ -511,7 +511,7 @@ public:
virtual
bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
unsigned ExtraPredCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return false;
}
@ -526,7 +526,7 @@ public:
unsigned NumTCycles, unsigned ExtraTCycles,
MachineBasicBlock &FMBB,
unsigned NumFCycles, unsigned ExtraFCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return false;
}
@ -538,7 +538,7 @@ public:
/// will be properly predicted.
virtual bool
isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return false;
}

12
lib/CodeGen/IfConversion.cpp
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@ -190,10 +190,10 @@ namespace {
private:
bool ReverseBranchCondition(BBInfo &BBI);
bool ValidSimple(BBInfo &TrueBBI, unsigned &Dups,
const BranchProbability &Prediction) const;
BranchProbability Prediction) const;
bool ValidTriangle(BBInfo &TrueBBI, BBInfo &FalseBBI,
bool FalseBranch, unsigned &Dups,
const BranchProbability &Prediction) const;
BranchProbability Prediction) const;
bool ValidDiamond(BBInfo &TrueBBI, BBInfo &FalseBBI,
unsigned &Dups1, unsigned &Dups2) const;
void ScanInstructions(BBInfo &BBI);
@ -218,7 +218,7 @@ namespace {
bool MeetIfcvtSizeLimit(MachineBasicBlock &BB,
unsigned Cycle, unsigned Extra,
const BranchProbability &Prediction) const {
BranchProbability Prediction) const {
return Cycle > 0 && TII->isProfitableToIfCvt(BB, Cycle, Extra,
Prediction);
}
@ -227,7 +227,7 @@ namespace {
unsigned TCycle, unsigned TExtra,
MachineBasicBlock &FBB,
unsigned FCycle, unsigned FExtra,
const BranchProbability &Prediction) const {
BranchProbability Prediction) const {
return TCycle > 0 && FCycle > 0 &&
TII->isProfitableToIfCvt(TBB, TCycle, TExtra, FBB, FCycle, FExtra,
Prediction);
@ -474,7 +474,7 @@ static inline MachineBasicBlock *getNextBlock(MachineBasicBlock *BB) {
/// number of instructions that the ifcvt would need to duplicate if performed
/// in Dups.
bool IfConverter::ValidSimple(BBInfo &TrueBBI, unsigned &Dups,
const BranchProbability &Prediction) const {
BranchProbability Prediction) const {
Dups = 0;
if (TrueBBI.IsBeingAnalyzed || TrueBBI.IsDone)
return false;
@ -501,7 +501,7 @@ bool IfConverter::ValidSimple(BBInfo &TrueBBI, unsigned &Dups,
/// if performed in 'Dups'.
bool IfConverter::ValidTriangle(BBInfo &TrueBBI, BBInfo &FalseBBI,
bool FalseBranch, unsigned &Dups,
const BranchProbability &Prediction) const {
BranchProbability Prediction) const {
Dups = 0;
if (TrueBBI.IsBeingAnalyzed || TrueBBI.IsDone)
return false;

8
lib/Support/BlockFrequency.cpp
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@ -18,24 +18,24 @@
using namespace llvm;
BlockFrequency &BlockFrequency::operator*=(const BranchProbability &Prob) {
BlockFrequency &BlockFrequency::operator*=(BranchProbability Prob) {
Frequency = Prob.scale(Frequency);
return *this;
}
const BlockFrequency
BlockFrequency::operator*(const BranchProbability &Prob) const {
BlockFrequency::operator*(BranchProbability Prob) const {
BlockFrequency Freq(Frequency);
Freq *= Prob;
return Freq;
}
BlockFrequency &BlockFrequency::operator/=(const BranchProbability &Prob) {
BlockFrequency &BlockFrequency::operator/=(BranchProbability Prob) {
Frequency = Prob.scaleByInverse(Frequency);
return *this;
}
BlockFrequency BlockFrequency::operator/(const BranchProbability &Prob) const {
BlockFrequency BlockFrequency::operator/(BranchProbability Prob) const {
BlockFrequency Freq(Frequency);
Freq /= Prob;
return Freq;

6
lib/Target/AMDGPU/R600InstrInfo.cpp
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@ -922,7 +922,7 @@ bool
R600InstrInfo::isProfitableToIfCvt(MachineBasicBlock &MBB,
unsigned NumCyles,
unsigned ExtraPredCycles,
const BranchProbability &Probability) const{
BranchProbability Probability) const{
return true;
}
@ -933,14 +933,14 @@ R600InstrInfo::isProfitableToIfCvt(MachineBasicBlock &TMBB,
MachineBasicBlock &FMBB,
unsigned NumFCycles,
unsigned ExtraFCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return true;
}
bool
R600InstrInfo::isProfitableToDupForIfCvt(MachineBasicBlock &MBB,
unsigned NumCyles,
const BranchProbability &Probability)
BranchProbability Probability)
const {
return true;
}

6
lib/Target/AMDGPU/R600InstrInfo.h
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@ -174,18 +174,18 @@ namespace llvm {
bool
isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
unsigned ExtraPredCycles,
const BranchProbability &Probability) const override ;
BranchProbability Probability) const override ;
bool
isProfitableToIfCvt(MachineBasicBlock &TMBB,
unsigned NumTCycles, unsigned ExtraTCycles,
MachineBasicBlock &FMBB,
unsigned NumFCycles, unsigned ExtraFCycles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool DefinesPredicate(MachineInstr *MI,
std::vector<MachineOperand> &Pred) const override;

4
lib/Target/ARM/ARMBaseInstrInfo.cpp
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@ -1640,7 +1640,7 @@ bool ARMBaseInstrInfo::isSchedulingBoundary(const MachineInstr *MI,
bool ARMBaseInstrInfo::
isProfitableToIfCvt(MachineBasicBlock &MBB,
unsigned NumCycles, unsigned ExtraPredCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
if (!NumCycles)
return false;
@ -1682,7 +1682,7 @@ isProfitableToIfCvt(MachineBasicBlock &TMBB,
unsigned TCycles, unsigned TExtra,
MachineBasicBlock &FMBB,
unsigned FCycles, unsigned FExtra,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
if (!TCycles || !FCycles)
return false;

6
lib/Target/ARM/ARMBaseInstrInfo.h
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@ -224,15 +224,15 @@ public:
bool isProfitableToIfCvt(MachineBasicBlock &MBB,
unsigned NumCycles, unsigned ExtraPredCycles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isProfitableToIfCvt(MachineBasicBlock &TMBB, unsigned NumT,
unsigned ExtraT, MachineBasicBlock &FMBB,
unsigned NumF, unsigned ExtraF,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
const BranchProbability &Probability) const override {
BranchProbability Probability) const override {
return NumCycles == 1;
}

6
lib/Target/Hexagon/HexagonInstrInfo.cpp
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@ -1063,7 +1063,7 @@ HexagonInstrInfo::
isProfitableToIfCvt(MachineBasicBlock &MBB,
unsigned NumCycles,
unsigned ExtraPredCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return true;
}
@ -1076,7 +1076,7 @@ isProfitableToIfCvt(MachineBasicBlock &TMBB,
MachineBasicBlock &FMBB,
unsigned NumFCycles,
unsigned ExtraFCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return true;
}
@ -1185,7 +1185,7 @@ bool HexagonInstrInfo::ReverseBranchCondition(
bool HexagonInstrInfo::
isProfitableToDupForIfCvt(MachineBasicBlock &MBB,unsigned NumInstrs,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return (NumInstrs <= 4);
}

6
lib/Target/Hexagon/HexagonInstrInfo.h
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@ -132,13 +132,13 @@ public:
bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
unsigned ExtraPredCycles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isProfitableToIfCvt(MachineBasicBlock &TMBB,
unsigned NumTCycles, unsigned ExtraTCycles,
MachineBasicBlock &FMBB,
unsigned NumFCycles, unsigned ExtraFCycles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isPredicated(const MachineInstr *MI) const override;
bool isPredicated(unsigned Opcode) const;
@ -155,7 +155,7 @@ public:
ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
DFAPacketizer *
CreateTargetScheduleState(const TargetSubtargetInfo &STI) const override;

2
lib/Target/PowerPC/PPCInstrInfo.cpp
View File

@ -1474,7 +1474,7 @@ bool PPCInstrInfo::isProfitableToIfCvt(MachineBasicBlock &TMBB,
unsigned NumT, unsigned ExtraT,
MachineBasicBlock &FMBB,
unsigned NumF, unsigned ExtraF,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
return !(MBBDefinesCTR(TMBB) && MBBDefinesCTR(FMBB));
}

10
lib/Target/PowerPC/PPCInstrInfo.h
View File

@ -215,7 +215,7 @@ public:
// profitable to use the predicated branches.
bool isProfitableToIfCvt(MachineBasicBlock &MBB,
unsigned NumCycles, unsigned ExtraPredCycles,
const BranchProbability &Probability) const override {
BranchProbability Probability) const override {
return true;
}
@ -223,12 +223,10 @@ public:
unsigned NumT, unsigned ExtraT,
MachineBasicBlock &FMBB,
unsigned NumF, unsigned ExtraF,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB,
unsigned NumCycles,
const BranchProbability
&Probability) const override {
bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
BranchProbability Probability) const override {
return true;
}

4
lib/Target/SystemZ/SystemZInstrInfo.cpp
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@ -514,7 +514,7 @@ bool SystemZInstrInfo::isPredicable(MachineInstr *MI) const {
bool SystemZInstrInfo::
isProfitableToIfCvt(MachineBasicBlock &MBB,
unsigned NumCycles, unsigned ExtraPredCycles,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
// For now only convert single instructions.
return NumCycles == 1;
}
@ -524,7 +524,7 @@ isProfitableToIfCvt(MachineBasicBlock &TMBB,
unsigned NumCyclesT, unsigned ExtraPredCyclesT,
MachineBasicBlock &FMBB,
unsigned NumCyclesF, unsigned ExtraPredCyclesF,
const BranchProbability &Probability) const {
BranchProbability Probability) const {
// For now avoid converting mutually-exclusive cases.
return false;
}

4
lib/Target/SystemZ/SystemZInstrInfo.h
View File

@ -159,12 +159,12 @@ public:
bool isPredicable(MachineInstr *MI) const override;
bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
unsigned ExtraPredCycles,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool isProfitableToIfCvt(MachineBasicBlock &TMBB,
unsigned NumCyclesT, unsigned ExtraPredCyclesT,
MachineBasicBlock &FMBB,
unsigned NumCyclesF, unsigned ExtraPredCyclesF,
const BranchProbability &Probability) const override;
BranchProbability Probability) const override;
bool PredicateInstruction(MachineInstr *MI,
ArrayRef<MachineOperand> Pred) const override;
void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,

2
unittests/Support/BranchProbabilityTest.cpp
View File

@ -14,7 +14,7 @@
using namespace llvm;
namespace llvm {
void PrintTo(const BranchProbability &P, ::std::ostream *os) {
void PrintTo(BranchProbability P, ::std::ostream *os) {
*os << P.getNumerator() << "/" << P.getDenominator();
}
}