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- Each val# can have multiple kills.

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- Fix some minor bugs related to special markers on val# def. ~0U means
  undefined, ~1U means dead val#.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40916 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-08-08 03:00:28 +00:00
parent 6a2bfdaab6
commit 8df786012d
4 changed files with 32 additions and 31 deletions
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9
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -347,7 +347,6 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
// Get the Idx of the defining instructions.
unsigned defIndex = getDefIndex(MIIdx);
unsigned ValNum;
unsigned SrcReg, DstReg;
if (!tii_->isMoveInstr(*mi, SrcReg, DstReg))
@ -378,6 +377,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
LiveRange LR(defIndex, killIdx, ValNum);
interval.addRange(LR);
DOUT << " +" << LR << "\n";
interval.addKillForValNum(ValNum, killIdx);
return;
}
}
@ -412,10 +412,11 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
// block to the 'use' slot of the killing instruction.
for (unsigned i = 0, e = vi.Kills.size(); i != e; ++i) {
MachineInstr *Kill = vi.Kills[i];
unsigned killIdx = getUseIndex(getInstructionIndex(Kill))+1;
LiveRange LR(getMBBStartIdx(Kill->getParent()),
getUseIndex(getInstructionIndex(Kill))+1,
ValNum);
killIdx, ValNum);
interval.addRange(LR);
interval.addKillForValNum(ValNum, killIdx);
DOUT << " +" << LR;
}
@ -450,7 +451,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
interval.setValueNumberInfo(1, interval.getValNumInfo(0));
// Value#0 is now defined by the 2-addr instruction.
interval.setValueNumberInfo(0, LiveInterval::VNInfo(DefIndex, ~0U, 0U));
interval.setValueNumberInfo(0, LiveInterval::VNInfo(DefIndex, 0U));
// Add the new live interval which replaces the range for the input copy.
LiveRange LR(DefIndex, RedefIndex, ValNo);