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Place context in member variables instead of passing around pointers.

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Use the opportunity to get rid of the trailing underscore variable names.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127618 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-03-14 20:57:14 +00:00
parent fb32507d09
commit cf03e35d90
2 changed files with 26 additions and 23 deletions
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10
include/llvm/CodeGen/ProcessImplicitDefs.h
View File

@ -18,14 +18,20 @@ namespace llvm {
class MachineInstr;
class TargetInstrInfo;
class TargetRegisterInfo;
class MachineRegisterInfo;
class LiveVariables;
/// Process IMPLICIT_DEF instructions and make sure there is one implicit_def
/// for each use. Add isUndef marker to implicit_def defs and their uses.
class ProcessImplicitDefs : public MachineFunctionPass {
private:
const TargetInstrInfo *TII;
const TargetRegisterInfo *TRI;
MachineRegisterInfo *MRI;
LiveVariables *LV;
bool CanTurnIntoImplicitDef(MachineInstr *MI, unsigned Reg,
unsigned OpIdx, const TargetInstrInfo *tii_,
unsigned OpIdx,
SmallSet<unsigned, 8> &ImpDefRegs);
public:

39
lib/CodeGen/ProcessImplicitDefs.cpp
View File

@ -47,7 +47,6 @@ void ProcessImplicitDefs::getAnalysisUsage(AnalysisUsage &AU) const {
bool
ProcessImplicitDefs::CanTurnIntoImplicitDef(MachineInstr *MI,
unsigned Reg, unsigned OpIdx,
const TargetInstrInfo *tii_,
SmallSet<unsigned, 8> &ImpDefRegs) {
switch(OpIdx) {
case 1:
@ -61,7 +60,6 @@ ProcessImplicitDefs::CanTurnIntoImplicitDef(MachineInstr *MI,
}
static bool isUndefCopy(MachineInstr *MI, unsigned Reg,
const TargetInstrInfo *tii_,
SmallSet<unsigned, 8> &ImpDefRegs) {
if (MI->isCopy()) {
MachineOperand &MO0 = MI->getOperand(0);
@ -86,11 +84,10 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
bool Changed = false;
const TargetInstrInfo *tii_ = fn.getTarget().getInstrInfo();
const TargetRegisterInfo *tri_ = fn.getTarget().getRegisterInfo();
MachineRegisterInfo *mri_ = &fn.getRegInfo();
LiveVariables *lv_ = &getAnalysis<LiveVariables>();
TII = fn.getTarget().getInstrInfo();
TRI = fn.getTarget().getRegisterInfo();
MRI = &fn.getRegInfo();
LV = &getAnalysis<LiveVariables>();
SmallSet<unsigned, 8> ImpDefRegs;
SmallVector<MachineInstr*, 8> ImpDefMIs;
@ -113,7 +110,7 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
unsigned Reg = MI->getOperand(0).getReg();
ImpDefRegs.insert(Reg);
if (TargetRegisterInfo::isPhysicalRegister(Reg)) {
for (const unsigned *SS = tri_->getSubRegisters(Reg); *SS; ++SS)
for (const unsigned *SS = TRI->getSubRegisters(Reg); *SS; ++SS)
ImpDefRegs.insert(*SS);
}
ImpDefMIs.push_back(MI);
@ -125,7 +122,7 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
MachineOperand &MO = MI->getOperand(1);
if (MO.isUndef() || ImpDefRegs.count(MO.getReg())) {
if (MO.isKill()) {
LiveVariables::VarInfo& vi = lv_->getVarInfo(MO.getReg());
LiveVariables::VarInfo& vi = LV->getVarInfo(MO.getReg());
vi.removeKill(MI);
}
MI->eraseFromParent();
@ -145,14 +142,14 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
if (!ImpDefRegs.count(Reg))
continue;
// Use is a copy, just turn it into an implicit_def.
if (CanTurnIntoImplicitDef(MI, Reg, i, tii_, ImpDefRegs)) {
if (CanTurnIntoImplicitDef(MI, Reg, i, ImpDefRegs)) {
bool isKill = MO.isKill();
MI->setDesc(tii_->get(TargetOpcode::IMPLICIT_DEF));
MI->setDesc(TII->get(TargetOpcode::IMPLICIT_DEF));
for (int j = MI->getNumOperands() - 1, ee = 0; j > ee; --j)
MI->RemoveOperand(j);
if (isKill) {
ImpDefRegs.erase(Reg);
LiveVariables::VarInfo& vi = lv_->getVarInfo(Reg);
LiveVariables::VarInfo& vi = LV->getVarInfo(Reg);
vi.removeKill(MI);
}
ChangedToImpDef = true;
@ -210,8 +207,8 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
// uses.
bool Skip = false;
SmallVector<MachineInstr*, 4> DeadImpDefs;
for (MachineRegisterInfo::def_iterator DI = mri_->def_begin(Reg),
DE = mri_->def_end(); DI != DE; ++DI) {
for (MachineRegisterInfo::def_iterator DI = MRI->def_begin(Reg),
DE = MRI->def_end(); DI != DE; ++DI) {
MachineInstr *DeadImpDef = &*DI;
if (!DeadImpDef->isImplicitDef()) {
Skip = true;
@ -229,8 +226,8 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
Changed = true;
// Process each use instruction once.
for (MachineRegisterInfo::use_iterator UI = mri_->use_begin(Reg),
UE = mri_->use_end(); UI != UE; ++UI) {
for (MachineRegisterInfo::use_iterator UI = MRI->use_begin(Reg),
UE = MRI->use_end(); UI != UE; ++UI) {
if (UI.getOperand().isUndef())
continue;
MachineInstr *RMI = &*UI;
@ -242,8 +239,8 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
MachineInstr *RMI = RUses[i];
// Turn a copy use into an implicit_def.
if (isUndefCopy(RMI, Reg, tii_, ImpDefRegs)) {
RMI->setDesc(tii_->get(TargetOpcode::IMPLICIT_DEF));
if (isUndefCopy(RMI, Reg, ImpDefRegs)) {
RMI->setDesc(TII->get(TargetOpcode::IMPLICIT_DEF));
bool isKill = false;
SmallVector<unsigned, 4> Ops;
@ -263,15 +260,15 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
// Update LiveVariables varinfo if the instruction is a kill.
if (isKill) {
LiveVariables::VarInfo& vi = lv_->getVarInfo(Reg);
LiveVariables::VarInfo& vi = LV->getVarInfo(Reg);
vi.removeKill(RMI);
}
continue;
}
// Replace Reg with a new vreg that's marked implicit.
const TargetRegisterClass* RC = mri_->getRegClass(Reg);
unsigned NewVReg = mri_->createVirtualRegister(RC);
const TargetRegisterClass* RC = MRI->getRegClass(Reg);
unsigned NewVReg = MRI->createVirtualRegister(RC);
bool isKill = true;
for (unsigned j = 0, ee = RMI->getNumOperands(); j != ee; ++j) {
MachineOperand &RRMO = RMI->getOperand(j);