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Factor out code into HandleVirtRegDef, for consistency with

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Handle{Virt,Phys}Reg{Def,Use}. Remove a redundant check
for register zero, and redundant checks for isPhysicalRegister.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56412 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-09-21 21:11:41 +00:00
parent 4893c067b7
commit 3bdf5fe71a
2 changed files with 13 additions and 13 deletions
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1
include/llvm/CodeGen/LiveVariables.h
View File

@ -263,6 +263,7 @@ public:
void MarkVirtRegAliveInBlock(VarInfo& VRInfo, MachineBasicBlock* DefBlock,
MachineBasicBlock *BB,
std::vector<MachineBasicBlock*> &WorkList);
void HandleVirtRegDef(unsigned reg, MachineInstr *MI);
void HandleVirtRegUse(unsigned reg, MachineBasicBlock *MBB,
MachineInstr *MI);
};

25
lib/CodeGen/LiveVariables.cpp
View File

@ -177,6 +177,14 @@ void LiveVariables::HandleVirtRegUse(unsigned reg, MachineBasicBlock *MBB,
MarkVirtRegAliveInBlock(VRInfo, MRI->getVRegDef(reg)->getParent(), *PI);
}
void LiveVariables::HandleVirtRegDef(unsigned Reg, MachineInstr *MI) {
VarInfo &VRInfo = getVarInfo(Reg);
if (VRInfo.AliveBlocks.none())
// If vr is not alive in any block, then defaults to dead.
VRInfo.Kills.push_back(MI);
}
/// FindLastPartialDef - Return the last partial def of the specified register.
/// Also returns the sub-register that's defined.
MachineInstr *LiveVariables::FindLastPartialDef(unsigned Reg,
@ -552,8 +560,6 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
const MachineOperand &MO = MI->getOperand(i);
if (MO.isRegister() && MO.getReg()) {
unsigned MOReg = MO.getReg();
if (!MOReg)
continue;
if (MO.isUse())
UseRegs.push_back(MOReg);
if (MO.isDef())
@ -566,24 +572,17 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
unsigned MOReg = UseRegs[i];
if (TargetRegisterInfo::isVirtualRegister(MOReg))
HandleVirtRegUse(MOReg, MBB, MI);
else if (TargetRegisterInfo::isPhysicalRegister(MOReg) &&
!ReservedRegisters[MOReg])
else if (!ReservedRegisters[MOReg])
HandlePhysRegUse(MOReg, MI);
}
// Process all defs.
for (unsigned i = 0, e = DefRegs.size(); i != e; ++i) {
unsigned MOReg = DefRegs[i];
if (TargetRegisterInfo::isVirtualRegister(MOReg)) {
VarInfo &VRInfo = getVarInfo(MOReg);
if (VRInfo.AliveBlocks.none())
// If vr is not alive in any block, then defaults to dead.
VRInfo.Kills.push_back(MI);
} else if (TargetRegisterInfo::isPhysicalRegister(MOReg) &&
!ReservedRegisters[MOReg]) {
if (TargetRegisterInfo::isVirtualRegister(MOReg))
HandleVirtRegDef(MOReg, MI);
else if (!ReservedRegisters[MOReg])
HandlePhysRegDef(MOReg, MI);
}
}
}