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VNInfo cleanup.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73634 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames
2009-06-17 21:01:20 +00:00
parent 559254b697
commit 857c4e01f8
10 changed files with 270 additions and 142 deletions
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lib/CodeGen/StrongPHIElimination.cpp
+4 -7
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@@ -827,7 +827,7 @@ void StrongPHIElimination::InsertCopies(MachineDomTreeNode* MDTN,
// Add a live range for the new vreg
LiveInterval& Int = LI.getInterval(I->getOperand(i).getReg());
VNInfo* FirstVN = *Int.vni_begin();
FirstVN->hasPHIKill = false;
FirstVN->setHasPHIKill(false);
if (I->getOperand(i).isKill())
FirstVN->kills.push_back(
LiveIntervals::getUseIndex(LI.getInstructionIndex(I)));
@@ -886,10 +886,7 @@ bool StrongPHIElimination::mergeLiveIntervals(unsigned primary,
VNInfo* OldVN = R.valno;
VNInfo*& NewVN = VNMap[OldVN];
if (!NewVN) {
NewVN = LHS.getNextValue(OldVN->def,
OldVN->copy,
LI.getVNInfoAllocator());
NewVN->kills = OldVN->kills;
NewVN = LHS.createValueCopy(OldVN, LI.getVNInfoAllocator());
}
LiveRange LR (R.start, R.end, NewVN);
@@ -987,7 +984,7 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
LiveInterval& Int = LI.getOrCreateInterval(I->first);
const LiveRange* LR =
Int.getLiveRangeContaining(LI.getMBBEndIdx(SI->second));
LR->valno->hasPHIKill = true;
LR->valno->setHasPHIKill(true);
I->second.erase(SI->first);
}
@@ -1037,7 +1034,7 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
// now has an unknown def.
unsigned idx = LI.getDefIndex(LI.getInstructionIndex(PInstr));
const LiveRange* PLR = PI.getLiveRangeContaining(idx);
PLR->valno->def = ~0U;
PLR->valno->setIsPHIDef(true);
LiveRange R (LI.getMBBStartIdx(PInstr->getParent()),
PLR->start, PLR->valno);
PI.addRange(R);