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Make LiveVariables::HandlePhysRegUse and

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LiveVariables::HandlePhysRegDef private they use information that is
not in memory when LiveVariables finishes the analysis.

Also update the TwoAddressInstructionPass to not use this interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10755 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-01-11 09:18:45 +00:00
parent a14b0d441d
commit b08bdc4a16
2 changed files with 14 additions and 23 deletions
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5
include/llvm/CodeGen/LiveVariables.h
View File

@ -109,6 +109,9 @@ private: // Intermediate data structures
MachineInstr **PhysRegInfo;
bool *PhysRegUsed;
void HandlePhysRegUse(unsigned Reg, MachineInstr *MI);
void HandlePhysRegDef(unsigned Reg, MachineInstr *MI);
public:
virtual bool runOnMachineFunction(MachineFunction &MF);
@ -253,8 +256,6 @@ public:
void MarkVirtRegAliveInBlock(VarInfo &VRInfo, const BasicBlock *BB);
void HandleVirtRegUse(VarInfo &VRInfo, MachineBasicBlock *MBB,
MachineInstr *MI);
void HandlePhysRegUse(unsigned Reg, MachineInstr *MI);
void HandlePhysRegDef(unsigned Reg, MachineInstr *MI);
};
} // End llvm namespace

32
lib/CodeGen/TwoAddressInstructionPass.cpp
View File

@ -120,8 +120,10 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &fn) {
// a = a op c
unsigned regA = mi->getOperand(0).getAllocatedRegNum();
unsigned regB = mi->getOperand(1).getAllocatedRegNum();
bool regAisPhysical = regA < MRegisterInfo::FirstVirtualRegister;
bool regBisPhysical = regB < MRegisterInfo::FirstVirtualRegister;
assert(regA >= MRegisterInfo::FirstVirtualRegister &&
regB >= MRegisterInfo::FirstVirtualRegister &&
"cannot update physical register live information");
// first make sure we do not have a use of a in the
// instruction (a = b + a for example) because our
@ -132,10 +134,8 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &fn) {
mi->getOperand(i).getAllocatedRegNum() != (int)regA);
}
const TargetRegisterClass* rc = regAisPhysical ?
mri_->getRegClass(regA) :
const TargetRegisterClass* rc =
mf_->getSSARegMap()->getRegClass(regA);
numInstrsAdded += mri_->copyRegToReg(*mbbi, mii, regA, regB, rc);
MachineInstr* prevMi = *(mii - 1);
@ -143,25 +143,15 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &fn) {
prevMi->print(std::cerr, *tm_));
// update live variables for regA
if (regAisPhysical) {
lv_->HandlePhysRegDef(regA, prevMi);
}
else {
LiveVariables::VarInfo& varInfo = lv_->getVarInfo(regA);
varInfo.DefInst = prevMi;
}
LiveVariables::VarInfo& varInfo = lv_->getVarInfo(regA);
varInfo.DefInst = prevMi;
// update live variables for regB
if (regBisPhysical) {
lv_->HandlePhysRegUse(regB, prevMi);
}
else {
if (lv_->removeVirtualRegisterKilled(regB, &*mbbi, mi))
lv_->addVirtualRegisterKilled(regB, &*mbbi, prevMi);
if (lv_->removeVirtualRegisterKilled(regB, &*mbbi, mi))
lv_->addVirtualRegisterKilled(regB, &*mbbi, prevMi);
if (lv_->removeVirtualRegisterDead(regB, &*mbbi, mi))
lv_->addVirtualRegisterDead(regB, &*mbbi, prevMi);
}
if (lv_->removeVirtualRegisterDead(regB, &*mbbi, mi))
lv_->addVirtualRegisterDead(regB, &*mbbi, prevMi);
// replace all occurences of regB with regA
for (unsigned i = 1; i < mi->getNumOperands(); ++i) {