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* Keep the BBMap around as long as the pass is live

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* Change getVarInfo to take real virtual register numbers and offset them
  itself.  This has caused me so much grief, it's not even funny.

llvm-svn: 6115
This commit is contained in:
Chris Lattner 2003-05-12 14:24:00 +00:00
parent afc685b278
commit a8497e3094
1 changed files with 23 additions and 8 deletions
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31
lib/CodeGen/LiveVariables.cpp
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@ -28,6 +28,26 @@
static RegisterAnalysis<LiveVariables> X("livevars", "Live Variable Analysis");
const std::pair<MachineBasicBlock*, unsigned> &
LiveVariables::getMachineBasicBlockInfo(MachineBasicBlock *MBB) const{
return BBMap.find(MBB->getBasicBlock())->second;
}
LiveVariables::VarInfo &LiveVariables::getVarInfo(unsigned RegIdx) {
assert(RegIdx >= MRegisterInfo::FirstVirtualRegister &&
"getVarInfo: not a virtual register!");
RegIdx -= MRegisterInfo::FirstVirtualRegister;
if (RegIdx >= VirtRegInfo.size()) {
if (RegIdx >= 2*VirtRegInfo.size())
VirtRegInfo.resize(RegIdx*2);
else
VirtRegInfo.resize(2*VirtRegInfo.size());
}
return VirtRegInfo[RegIdx];
}
void LiveVariables::MarkVirtRegAliveInBlock(VarInfo &VRInfo,
const BasicBlock *BB) {
const std::pair<MachineBasicBlock*,unsigned> &Info = BBMap.find(BB)->second;
@ -195,8 +215,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
MachineOperand &MO = MI->getOperand(i);
if (MO.opIsUse() || MO.opIsDefAndUse()) {
if (MO.isVirtualRegister() && !MO.getVRegValueOrNull()) {
unsigned RegIdx = MO.getReg()-MRegisterInfo::FirstVirtualRegister;
HandleVirtRegUse(getVarInfo(RegIdx), MBB, MI);
HandleVirtRegUse(getVarInfo(MO.getReg()), MBB, MI);
} else if (MO.isPhysicalRegister() &&
AllocatablePhysicalRegisters[MO.getReg()]) {
HandlePhysRegUse(MO.getReg(), MI);
@ -214,8 +233,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
MachineOperand &MO = MI->getOperand(i);
if (MO.opIsDef() || MO.opIsDefAndUse()) {
if (MO.isVirtualRegister()) {
unsigned RegIdx = MO.getReg()-MRegisterInfo::FirstVirtualRegister;
VarInfo &VRInfo = getVarInfo(RegIdx);
VarInfo &VRInfo = getVarInfo(MO.getReg());
assert(VRInfo.DefBlock == 0 && "Variable multiply defined!");
VRInfo.DefBlock = MBB; // Created here...
@ -245,8 +263,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
if (MI->getOperand(i+1).getMachineBasicBlock() == MBB) {
MachineOperand &MO = MI->getOperand(i);
if (!MO.getVRegValueOrNull()) {
unsigned RegIdx = MO.getReg()-MRegisterInfo::FirstVirtualRegister;
VarInfo &VRInfo = getVarInfo(RegIdx);
VarInfo &VRInfo = getVarInfo(MO.getReg());
// Only mark it alive only in the block we are representing...
MarkVirtRegAliveInBlock(VRInfo, BB);
@ -263,8 +280,6 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
HandlePhysRegDef(i, 0);
}
BBMap.clear();
// Convert the information we have gathered into VirtRegInfo and transform it
// into a form usable by RegistersKilled.
//