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More two-address fixes. This gets lua working with join-creation enabled.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62073 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2009-01-12 03:10:40 +00:00
parent d4a2700fdc
commit e1762c9826
1 changed files with 10 additions and 6 deletions
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16
lib/CodeGen/PreAllocSplitting.cpp
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@ -639,6 +639,8 @@ VNInfo* PreAllocSplitting::PerformPHIConstruction(
EndIndex = LIs->getMBBEndIdx(MBB);
LI->addRange(LiveRange(StartIndex, EndIndex+1, ret));
if (intrablock)
LI->addKill(ret, EndIndex);
} else {
Phis[MBB] = ret = LI->getNextValue(~0U, /*FIXME*/ 0,
LIs->getVNInfoAllocator());
@ -673,6 +675,8 @@ VNInfo* PreAllocSplitting::PerformPHIConstruction(
} else
EndIndex = LIs->getMBBEndIdx(MBB);
LI->addRange(LiveRange(StartIndex, EndIndex+1, ret));
if (intrablock)
LI->addKill(ret, EndIndex);
}
} else if (ContainsDefs && !ContainsUses) {
SmallPtrSet<MachineInstr*, 2>& BlockDefs = Defs[MBB];
@ -808,7 +812,8 @@ VNInfo* PreAllocSplitting::PerformPHIConstruction(
// Memoize results so we don't have to recompute them.
if (!intrablock) LiveOut[MBB] = ret;
else {
NewVNs[use] = ret;
if (!NewVNs.count(use))
NewVNs[use] = ret;
Visited.insert(use);
}
@ -1124,13 +1129,14 @@ bool PreAllocSplitting::Rematerialize(unsigned vreg, VNInfo* ValNo,
if (KillPt->getParent() == BarrierMBB) {
UpdateRegisterInterval(ValNo, LIs->getUseIndex(KillIdx)+1,
LIs->getDefIndex(RestoreIdx));
++NumSplits;
++NumRemats;
return true;
}
RepairLiveInterval(CurrLI, ValNo, DefMI, RestoreIdx);
++NumSplits;
++NumRemats;
return true;
@ -1211,10 +1217,6 @@ bool PreAllocSplitting::SplitRegLiveInterval(LiveInterval *LI) {
MachineInstr *DefMI = (ValNo->def != ~0U)
? LIs->getInstructionFromIndex(ValNo->def) : NULL;
// If this would create a new join point, do not split.
if (DefMI && createsNewJoin(LR, DefMI->getParent(), Barrier->getParent()))
return false;
// Find all references in the barrier mbb.
SmallPtrSet<MachineInstr*, 4> RefsInMBB;
for (MachineRegisterInfo::reg_iterator I = MRI->reg_begin(CurrLI->reg),
@ -1355,6 +1357,8 @@ PreAllocSplitting::SplitRegLiveIntervals(const TargetRegisterClass **RCs) {
while (!Intervals.empty()) {
if (PreSplitLimit != -1 && (int)NumSplits == PreSplitLimit)
break;
else if (NumSplits == 4)
Change |= Change;
LiveInterval *LI = Intervals.back();
Intervals.pop_back();
Change |= SplitRegLiveInterval(LI);