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Minor cleanup

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5976 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-05-01 21:18:47 +00:00
parent cdeb81d412
commit f98358efc7
1 changed files with 6 additions and 4 deletions
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10
lib/CodeGen/LiveVariables.cpp
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@ -209,15 +209,17 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
// bottom of this basic block. We check all of our successor blocks to see
// if they have PHI nodes, and if so, we simulate an assignment at the end
// of the current block.
for (succ_const_iterator I = succ_begin(BB), E = succ_end(BB); I != E; ++I){
MachineBasicBlock *Succ = BBMap.find(*I)->second.first;
for (succ_const_iterator SI = succ_begin(BB), E = succ_end(BB);
SI != E; ++SI) {
MachineBasicBlock *Succ = BBMap.find(*SI)->second.first;
// PHI nodes are guaranteed to be at the top of the block...
for (MachineBasicBlock::iterator I = Succ->begin(), E = Succ->end();
I != E && (*I)->getOpcode() == TargetInstrInfo::PHI; ++I) {
MachineInstr *MI = *I;
for (unsigned i = 1; ; i += 2)
if ((*I)->getOperand(i+1).getMachineBasicBlock() == MBB) {
MachineOperand &MO = (*I)->getOperand(i);
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);