Author: resistor
Date: Tue Jan 15 16:02:46 2008
New Revision: 46016
URL: http://llvm.org/viewvc/llvm-project?rev=46016&view=rev
Log:
Remove DefInst from LiveVariables::VarInfo. Use the facilities on
MachineRegisterInfo instead.
Modified:
llvm/trunk/lib/CodeGen/LiveVariables.cpp
llvm/trunk/lib/CodeGen/PHIElimination.cpp
llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp
llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp
Modified: llvm/trunk/lib/CodeGen/LiveVariables.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveVariables.cpp?rev=46016&r1=46015&r2=46016&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveVariables.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveVariables.cpp Tue Jan 15 16:02:46 2008
@@ -43,11 +43,6 @@
static RegisterPass<LiveVariables> X("livevars", "Live Variable Analysis");
void LiveVariables::VarInfo::dump() const {
- cerr << "Register Defined by: ";
- if (DefInst)
- cerr << *DefInst;
- else
- cerr << "<null>\n";
cerr << " Alive in blocks: ";
for (unsigned i = 0, e = AliveBlocks.size(); i != e; ++i)
if (AliveBlocks[i]) cerr << i << ", ";
@@ -117,11 +112,13 @@
return false;
}
-void LiveVariables::MarkVirtRegAliveInBlock(VarInfo &VRInfo,
+void LiveVariables::MarkVirtRegAliveInBlock(unsigned reg,
MachineBasicBlock *MBB,
std::vector<MachineBasicBlock*> &WorkList)
{
unsigned BBNum = MBB->getNumber();
+ VarInfo& VRInfo = getVarInfo(reg);
+
// Check to see if this basic block is one of the killing blocks. If so,
// remove it...
for (unsigned i = 0, e = VRInfo.Kills.size(); i != e; ++i)
@@ -129,8 +126,9 @@
VRInfo.Kills.erase(VRInfo.Kills.begin()+i); // Erase entry
break;
}
-
- if (MBB == VRInfo.DefInst->getParent()) return; // Terminate recursion
+
+ MachineRegisterInfo& MRI = MBB->getParent()->getRegInfo();
+ if (MBB == MRI.getVRegDef(reg)->getParent()) return; // Terminate recursion
if (VRInfo.AliveBlocks[BBNum])
return; // We already know the block is live
@@ -143,24 +141,26 @@
WorkList.push_back(*PI);
}
-void LiveVariables::MarkVirtRegAliveInBlock(VarInfo &VRInfo,
+void LiveVariables::MarkVirtRegAliveInBlock(unsigned reg,
MachineBasicBlock *MBB) {
std::vector<MachineBasicBlock*> WorkList;
- MarkVirtRegAliveInBlock(VRInfo, MBB, WorkList);
+ MarkVirtRegAliveInBlock(reg, MBB, WorkList);
while (!WorkList.empty()) {
MachineBasicBlock *Pred = WorkList.back();
WorkList.pop_back();
- MarkVirtRegAliveInBlock(VRInfo, Pred, WorkList);
+ MarkVirtRegAliveInBlock(reg, Pred, WorkList);
}
}
-void LiveVariables::HandleVirtRegUse(VarInfo &VRInfo, MachineBasicBlock *MBB,
+void LiveVariables::HandleVirtRegUse(unsigned reg, MachineBasicBlock *MBB,
MachineInstr *MI) {
- assert(VRInfo.DefInst && "Register use before def!");
+ MachineRegisterInfo& MRI = MBB->getParent()->getRegInfo();
+ assert(MRI.getVRegDef(reg) && "Register use before def!");
unsigned BBNum = MBB->getNumber();
+ VarInfo& VRInfo = getVarInfo(reg);
VRInfo.UsedBlocks[BBNum] = true;
VRInfo.NumUses++;
@@ -177,7 +177,7 @@
assert(VRInfo.Kills[i]->getParent() != MBB && "entry should be at end!");
#endif
- assert(MBB != VRInfo.DefInst->getParent() &&
+ assert(MBB != MRI.getVRegDef(reg)->getParent() &&
"Should have kill for defblock!");
// Add a new kill entry for this basic block.
@@ -190,7 +190,7 @@
// Update all dominating blocks to mark them known live.
for (MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(),
E = MBB->pred_end(); PI != E; ++PI)
- MarkVirtRegAliveInBlock(VRInfo, *PI);
+ MarkVirtRegAliveInBlock(reg, *PI);
}
bool LiveVariables::addRegisterKilled(unsigned IncomingReg, MachineInstr *MI,
@@ -489,7 +489,7 @@
MachineOperand &MO = MI->getOperand(i);
if (MO.isRegister() && MO.isUse() && MO.getReg()) {
if (MRegisterInfo::isVirtualRegister(MO.getReg())){
- HandleVirtRegUse(getVarInfo(MO.getReg()), MBB, MI);
+ HandleVirtRegUse(MO.getReg(), MBB, MI);
} else if (MRegisterInfo::isPhysicalRegister(MO.getReg()) &&
!ReservedRegisters[MO.getReg()]) {
HandlePhysRegUse(MO.getReg(), MI);
@@ -503,9 +503,6 @@
if (MO.isRegister() && MO.isDef() && MO.getReg()) {
if (MRegisterInfo::isVirtualRegister(MO.getReg())) {
VarInfo &VRInfo = getVarInfo(MO.getReg());
-
- assert(VRInfo.DefInst == 0 && "Variable multiply defined!");
- VRInfo.DefInst = MI;
// Defaults to dead
VRInfo.Kills.push_back(MI);
} else if (MRegisterInfo::isPhysicalRegister(MO.getReg()) &&
@@ -525,11 +522,8 @@
for (SmallVector<unsigned, 4>::iterator I = VarInfoVec.begin(),
E = VarInfoVec.end(); I != E; ++I) {
- VarInfo& VRInfo = getVarInfo(*I);
- assert(VRInfo.DefInst && "Register use before def (or no def)!");
-
// Only mark it alive only in the block we are representing.
- MarkVirtRegAliveInBlock(VRInfo, MBB);
+ MarkVirtRegAliveInBlock(*I, MBB);
}
}
@@ -566,9 +560,11 @@
// Convert and transfer the dead / killed information we have gathered into
// VirtRegInfo onto MI's.
//
+ MachineRegisterInfo& MRI = mf.getRegInfo();
for (unsigned i = 0, e1 = VirtRegInfo.size(); i != e1; ++i)
for (unsigned j = 0, e2 = VirtRegInfo[i].Kills.size(); j != e2; ++j) {
- if (VirtRegInfo[i].Kills[j] == VirtRegInfo[i].DefInst)
+ if (VirtRegInfo[i].Kills[j] == MRI.getVRegDef(i +
+
MRegisterInfo::FirstVirtualRegister))
addRegisterDead(i + MRegisterInfo::FirstVirtualRegister,
VirtRegInfo[i].Kills[j], RegInfo);
else
@@ -612,9 +608,6 @@
MO.setIsDead(false);
addVirtualRegisterDead(Reg, NewMI);
}
- // Update the defining instruction.
- if (VI.DefInst == OldMI)
- VI.DefInst = NewMI;
}
if (MO.isKill()) {
MO.setIsKill(false);
Modified: llvm/trunk/lib/CodeGen/PHIElimination.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PHIElimination.cpp?rev=46016&r1=46015&r2=46016&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PHIElimination.cpp (original)
+++ llvm/trunk/lib/CodeGen/PHIElimination.cpp Tue Jan 15 16:02:46 2008
@@ -165,10 +165,6 @@
LV->addVirtualRegisterDead(DestReg, PHICopy);
LV->removeVirtualRegistersDead(MPhi);
}
-
- // Realize that the destination register is defined by the PHI copy now,
not
- // the PHI itself.
- LV->getVarInfo(DestReg).DefInst = PHICopy;
LV->getVarInfo(IncomingReg).UsedBlocks[MBB.getNumber()] = true;
}
Modified: llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp?rev=46016&r1=46015&r2=46016&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp (original)
+++ llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp Tue Jan 15 16:02:46
2008
@@ -199,10 +199,6 @@
MachineBasicBlock::iterator prevMi = prior(mi);
DOUT << "\t\tprepend:\t"; DEBUG(prevMi->print(*cerr.stream(), &TM));
- // Update live variables for regA
- LiveVariables::VarInfo& varInfo = LV.getVarInfo(regA);
- varInfo.DefInst = prevMi;
-
// update live variables for regB
LiveVariables::VarInfo& varInfoB = LV.getVarInfo(regB);
// regB is used in this BB.
Modified: llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp?rev=46016&r1=46015&r2=46016&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrInfo.cpp Tue Jan 15 16:02:46 2008
@@ -289,9 +289,6 @@
MachineInstr *NewMI = (Reg == WBReg) ? UpdateMI : MemMI;
if (MO.isDead())
LV.addVirtualRegisterDead(Reg, NewMI);
- // Update the defining instruction.
- if (VI.DefInst == MI)
- VI.DefInst = NewMI;
}
if (MO.isUse() && MO.isKill()) {
for (unsigned j = 0; j < 2; ++j) {
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