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Simplify this code by using higher-level LiveVariables methods

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22989 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-23 22:51:41 +00:00
parent 76eb08bcda
commit ab4b66d4c2
1 changed files with 10 additions and 20 deletions
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30
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -431,12 +431,8 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock* mbb,
// If this redefinition is dead, we need to add a dummy unit live
// range covering the def slot.
for (LiveVariables::killed_iterator KI = lv_->dead_begin(mi),
E = lv_->dead_end(mi); KI != E; ++KI)
if (KI->second == interval.reg) {
interval.addRange(LiveRange(RedefIndex, RedefIndex+1, 0));
break;
}
if (lv_->RegisterDefIsDead(mi, interval.reg))
interval.addRange(LiveRange(RedefIndex, RedefIndex+1, 0));
DEBUG(std::cerr << "RESULT: " << interval);
@ -496,13 +492,10 @@ void LiveIntervals::handlePhysicalRegisterDef(MachineBasicBlock *MBB,
// If it is not used after definition, it is considered dead at
// the instruction defining it. Hence its interval is:
// [defSlot(def), defSlot(def)+1)
for (KillIter ki = lv_->dead_begin(mi), ke = lv_->dead_end(mi);
ki != ke; ++ki) {
if (interval.reg == ki->second) {
DEBUG(std::cerr << " dead");
end = getDefIndex(start) + 1;
goto exit;
}
if (lv_->RegisterDefIsDead(mi, interval.reg)) {
DEBUG(std::cerr << " dead");
end = getDefIndex(start) + 1;
goto exit;
}
// If it is not dead on definition, it must be killed by a
@ -512,13 +505,10 @@ void LiveIntervals::handlePhysicalRegisterDef(MachineBasicBlock *MBB,
++mi;
assert(mi != MBB->end() && "physreg was not killed in defining block!");
baseIndex += InstrSlots::NUM;
for (KillIter ki = lv_->killed_begin(mi), ke = lv_->killed_end(mi);
ki != ke; ++ki) {
if (interval.reg == ki->second) {
DEBUG(std::cerr << " killed");
end = getUseIndex(baseIndex) + 1;
goto exit;
}
if (lv_->KillsRegister(mi, interval.reg)) {
DEBUG(std::cerr << " killed");
end = getUseIndex(baseIndex) + 1;
goto exit;
}
}