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Fix up kill/dead marking in the new live interval reconstruction code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61460 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-12-28 23:35:13 +00:00
parent 169d408027
commit d4f6fe55eb
1 changed files with 18 additions and 6 deletions
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24
lib/CodeGen/PreAllocSplitting.cpp
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@ -722,10 +722,9 @@ VNInfo* PreAllocSplitting::PerformPHIConstruction(
NewVNs, Visited, false);
// FIXME: Need to set kills properly for inter-block stuff.
if (toplevel) {
if (LI->isKill(ret, UseIndex)) LI->removeKill(ret, UseIndex);
if (LI->isKill(ret, UseIndex)) LI->removeKill(ret, UseIndex);
if (toplevel)
LI->addKill(ret, EndIndex);
}
LI->addRange(LiveRange(UseIndex, EndIndex, ret));
} else if (ContainsDefs && ContainsUses){
@ -778,10 +777,9 @@ VNInfo* PreAllocSplitting::PerformPHIConstruction(
ret = PerformPHIConstruction(walker, LI, Defs, Uses,
NewVNs, Visited, false);
// FIXME: Need to set kills properly for inter-block stuff.
if (foundUse && LI->isKill(ret, StartIndex))
LI->removeKill(ret, StartIndex);
if (toplevel) {
if (foundUse && LI->isKill(ret, StartIndex))
LI->removeKill(ret, StartIndex);
LI->addKill(ret, EndIndex);
}
@ -834,6 +832,20 @@ void PreAllocSplitting::ReconstructLiveInterval(LiveInterval* LI) {
DenseMap<MachineBasicBlock*, VNInfo*> Visited;
PerformPHIConstruction(&*UI, LI, Defs, Uses, NewVNs, Visited, true);
}
// Add ranges for dead defs
for (MachineRegisterInfo::def_iterator DI = MRI->def_begin(LI->reg),
DE = MRI->def_end(); DI != DE; ++DI) {
unsigned DefIdx = LIs->getInstructionIndex(&*DI);
DefIdx = LiveIntervals::getDefIndex(DefIdx);
unsigned UseIdx = LiveIntervals::getUseIndex(DefIdx);
if (LI->liveAt(DefIdx)) continue;
VNInfo* DeadVN = NewVNs[&*DI];
LI->addRange(LiveRange(DefIdx, UseIdx, DeadVN));
LI->addKill(DeadVN, DefIdx);
}
}
/// ShrinkWrapLiveInterval - Recursively traverse the predecessor