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Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
-rw-r--r--lib/CodeGen/LiveVariables.cpp94
1 files changed, 24 insertions, 70 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp
index 48bf809e48..27f459d4f9 100644
--- a/lib/CodeGen/LiveVariables.cpp
+++ b/lib/CodeGen/LiveVariables.cpp
@@ -76,51 +76,6 @@ LiveVariables::VarInfo &LiveVariables::getVarInfo(unsigned RegIdx) {
return VI;
}
-/// KillsRegister - Returns true if the machine instruction kills the specified
-/// register.
-bool LiveVariables::KillsRegister(MachineInstr *MI, unsigned Reg) const {
- for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
- const MachineOperand &MO = MI->getOperand(i);
- if (MO.isRegister() && MO.isKill()) {
- unsigned MOReg = MO.getReg();
- if (MOReg == Reg ||
- (TargetRegisterInfo::isPhysicalRegister(MOReg) &&
- TargetRegisterInfo::isPhysicalRegister(Reg) &&
- RegInfo->isSubRegister(MOReg, Reg)))
- return true;
- }
- }
- return false;
-}
-
-/// RegisterDefIsDead - Returns true if the register is dead in this machine
-/// instruction.
-bool LiveVariables::RegisterDefIsDead(MachineInstr *MI, unsigned Reg) const {
- for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
- const MachineOperand &MO = MI->getOperand(i);
- if (MO.isRegister() && MO.isDead()) {
- unsigned MOReg = MO.getReg();
- if ((MOReg == Reg) ||
- (TargetRegisterInfo::isPhysicalRegister(MOReg) &&
- TargetRegisterInfo::isPhysicalRegister(Reg) &&
- RegInfo->isSubRegister(MOReg, Reg)))
- return true;
- }
- }
- return false;
-}
-
-/// ModifiesRegister - Returns true if the machine instruction modifies the
-/// register.
-bool LiveVariables::ModifiesRegister(MachineInstr *MI, unsigned Reg) const {
- for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
- const MachineOperand &MO = MI->getOperand(i);
- if (MO.isRegister() && MO.isDef() && MO.getReg() == Reg)
- return true;
- }
- return false;
-}
-
void LiveVariables::MarkVirtRegAliveInBlock(VarInfo& VRInfo,
MachineBasicBlock *DefBlock,
MachineBasicBlock *MBB,
@@ -232,7 +187,7 @@ void LiveVariables::HandlePhysRegUse(unsigned Reg, MachineInstr *MI) {
!PhysRegUsed[Reg]) {
MachineInstr *Def = PhysRegInfo[Reg];
- if (!Def->findRegisterDefOperand(Reg))
+ if (!Def->modifiesRegister(Reg))
Def->addOperand(MachineOperand::CreateReg(Reg,
true /*IsDef*/,
true /*IsImp*/));
@@ -244,14 +199,14 @@ void LiveVariables::HandlePhysRegUse(unsigned Reg, MachineInstr *MI) {
PhysRegUsed[Reg] = true;
// Now reset the use information for the sub-registers.
- for (const unsigned *SubRegs = RegInfo->getSubRegisters(Reg);
+ for (const unsigned *SubRegs = TRI->getSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs) {
PhysRegPartUse[SubReg] = NULL;
PhysRegInfo[SubReg] = MI;
PhysRegUsed[SubReg] = true;
}
- for (const unsigned *SuperRegs = RegInfo->getSuperRegisters(Reg);
+ for (const unsigned *SuperRegs = TRI->getSuperRegisters(Reg);
unsigned SuperReg = *SuperRegs; ++SuperRegs) {
// Remember the partial use of this super-register if it was previously
// defined.
@@ -261,7 +216,7 @@ void LiveVariables::HandlePhysRegUse(unsigned Reg, MachineInstr *MI) {
// No need to go up more levels. A def of a register also sets its sub-
// registers. So if PhysRegInfo[SuperReg] is NULL, it means SuperReg's
// super-registers are not previously defined.
- for (const unsigned *SSRegs = RegInfo->getSuperRegisters(SuperReg);
+ for (const unsigned *SSRegs = TRI->getSuperRegisters(SuperReg);
unsigned SSReg = *SSRegs; ++SSRegs)
if (PhysRegInfo[SSReg] != NULL) {
HasPrevDef = true;
@@ -281,11 +236,11 @@ void LiveVariables::HandlePhysRegUse(unsigned Reg, MachineInstr *MI) {
void LiveVariables::addRegisterKills(unsigned Reg, MachineInstr *MI,
SmallSet<unsigned, 4> &SubKills) {
if (SubKills.count(Reg) == 0) {
- MI->addRegisterKilled(Reg, RegInfo, true);
+ MI->addRegisterKilled(Reg, TRI, true);
return;
}
- for (const unsigned *SubRegs = RegInfo->getImmediateSubRegisters(Reg);
+ for (const unsigned *SubRegs = TRI->getImmediateSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs)
addRegisterKills(SubReg, MI, SubKills);
}
@@ -300,7 +255,7 @@ void LiveVariables::addRegisterKills(unsigned Reg, MachineInstr *MI,
/// SubKills is filled with the set of sub-registers that are killed elsewhere.
bool LiveVariables::HandlePhysRegKill(unsigned Reg, const MachineInstr *RefMI,
SmallSet<unsigned, 4> &SubKills) {
- const unsigned *SubRegs = RegInfo->getImmediateSubRegisters(Reg);
+ const unsigned *SubRegs = TRI->getImmediateSubRegisters(Reg);
for (; unsigned SubReg = *SubRegs; ++SubRegs) {
const MachineInstr *LastRef = PhysRegInfo[SubReg];
@@ -330,12 +285,12 @@ bool LiveVariables::HandlePhysRegKill(unsigned Reg, MachineInstr *RefMI) {
if (HandlePhysRegKill(Reg, RefMI, SubKills)) {
// This machine instruction kills this register.
- RefMI->addRegisterKilled(Reg, RegInfo, true);
+ RefMI->addRegisterKilled(Reg, TRI, true);
return true;
}
// Some sub-registers are killed by another machine instruction.
- for (const unsigned *SubRegs = RegInfo->getImmediateSubRegisters(Reg);
+ for (const unsigned *SubRegs = TRI->getImmediateSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs)
addRegisterKills(SubReg, RefMI, SubKills);
@@ -348,38 +303,38 @@ void LiveVariables::HandlePhysRegDef(unsigned Reg, MachineInstr *MI) {
if (PhysRegUsed[Reg]) {
if (!HandlePhysRegKill(Reg, LastRef)) {
if (PhysRegPartUse[Reg])
- PhysRegPartUse[Reg]->addRegisterKilled(Reg, RegInfo, true);
+ PhysRegPartUse[Reg]->addRegisterKilled(Reg, TRI, true);
}
} else if (PhysRegPartUse[Reg]) {
// Add implicit use / kill to last partial use.
- PhysRegPartUse[Reg]->addRegisterKilled(Reg, RegInfo, true);
+ PhysRegPartUse[Reg]->addRegisterKilled(Reg, TRI, true);
} else if (LastRef != MI) {
// Defined, but not used. However, watch out for cases where a super-reg
// is also defined on the same MI.
- LastRef->addRegisterDead(Reg, RegInfo);
+ LastRef->addRegisterDead(Reg, TRI);
}
}
- for (const unsigned *SubRegs = RegInfo->getSubRegisters(Reg);
+ for (const unsigned *SubRegs = TRI->getSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs) {
if (MachineInstr *LastRef = PhysRegInfo[SubReg]) {
if (PhysRegUsed[SubReg]) {
if (!HandlePhysRegKill(SubReg, LastRef)) {
if (PhysRegPartUse[SubReg])
- PhysRegPartUse[SubReg]->addRegisterKilled(SubReg, RegInfo, true);
+ PhysRegPartUse[SubReg]->addRegisterKilled(SubReg, TRI, true);
}
} else if (PhysRegPartUse[SubReg]) {
// Add implicit use / kill to last use of a sub-register.
- PhysRegPartUse[SubReg]->addRegisterKilled(SubReg, RegInfo, true);
+ PhysRegPartUse[SubReg]->addRegisterKilled(SubReg, TRI, true);
} else if (LastRef != MI) {
// This must be a def of the subreg on the same MI.
- LastRef->addRegisterDead(SubReg, RegInfo);
+ LastRef->addRegisterDead(SubReg, TRI);
}
}
}
if (MI) {
- for (const unsigned *SuperRegs = RegInfo->getSuperRegisters(Reg);
+ for (const unsigned *SuperRegs = TRI->getSuperRegisters(Reg);
unsigned SuperReg = *SuperRegs; ++SuperRegs) {
if (PhysRegInfo[SuperReg] && PhysRegInfo[SuperReg] != MI) {
// The larger register is previously defined. Now a smaller part is
@@ -404,7 +359,7 @@ void LiveVariables::HandlePhysRegDef(unsigned Reg, MachineInstr *MI) {
PhysRegPartDef[Reg].clear();
PhysRegPartUse[Reg] = NULL;
- for (const unsigned *SubRegs = RegInfo->getSubRegisters(Reg);
+ for (const unsigned *SubRegs = TRI->getSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs) {
PhysRegInfo[SubReg] = MI;
PhysRegUsed[SubReg] = false;
@@ -416,13 +371,12 @@ void LiveVariables::HandlePhysRegDef(unsigned Reg, MachineInstr *MI) {
bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
MF = &mf;
- RegInfo = MF->getTarget().getRegisterInfo();
+ TRI = MF->getTarget().getRegisterInfo();
MachineRegisterInfo& MRI = mf.getRegInfo();
- assert(RegInfo && "Target doesn't have register information?");
- ReservedRegisters = RegInfo->getReservedRegs(mf);
+ ReservedRegisters = TRI->getReservedRegs(mf);
- unsigned NumRegs = RegInfo->getNumRegs();
+ unsigned NumRegs = TRI->getNumRegs();
PhysRegInfo = new MachineInstr*[NumRegs];
PhysRegUsed = new bool[NumRegs];
PhysRegPartUse = new MachineInstr*[NumRegs];
@@ -533,7 +487,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
HandlePhysRegUse(*I, Ret);
// Add live-out registers as implicit uses.
- if (Ret->findRegisterUseOperandIdx(*I) == -1)
+ if (!Ret->readsRegister(*I))
Ret->addOperand(MachineOperand::CreateReg(*I, false, true));
}
}
@@ -562,12 +516,12 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
VirtRegInfo[i]
.Kills[j]->addRegisterDead(i +
TargetRegisterInfo::FirstVirtualRegister,
- RegInfo);
+ TRI);
else
VirtRegInfo[i]
.Kills[j]->addRegisterKilled(i +
TargetRegisterInfo::FirstVirtualRegister,
- RegInfo);
+ TRI);
// Check to make sure there are no unreachable blocks in the MC CFG for the
// function. If so, it is due to a bug in the instruction selector or some
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-04-30 19:16:48 +0000