MachineInstr *TwoAddressInstructionPass::FindLastUseInMBB(unsigned Reg,
MachineBasicBlock *MBB,
unsigned Dist) {
- unsigned LastUseDist = Dist;
+ unsigned LastUseDist = 0;
MachineInstr *LastUse = 0;
for (MachineRegisterInfo::reg_iterator I = MRI->reg_begin(Reg),
E = MRI->reg_end(); I != E; ++I) {
DenseMap<MachineInstr*, unsigned>::iterator DI = DistanceMap.find(MI);
if (DI == DistanceMap.end())
continue;
- if (MO.isUse() && DI->second < LastUseDist) {
+ if (DI->second >= Dist)
+ continue;
+
+ if (MO.isUse() && DI->second > LastUseDist) {
LastUse = DI->first;
LastUseDist = DI->second;
}
// Update live variables for regB.
if (LV) {
- LiveVariables::VarInfo& varInfoB = LV->getVarInfo(regB);
-
- // regB is used in this BB.
- varInfoB.UsedBlocks[mbbi->getNumber()] = true;
-
if (LV->removeVirtualRegisterKilled(regB, mi))
LV->addVirtualRegisterKilled(regB, prevMI);