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LiveVariables should clear kill / dead markers first. This allows us to remove a hack in the scheduler.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99597 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-03-26 02:12:24 +00:00
parent 0a3dc10eba
commit d05e805536
2 changed files with 8 additions and 6 deletions
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10
lib/CodeGen/LiveVariables.cpp
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@ -556,17 +556,21 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
if (MI->isPHI())
NumOperandsToProcess = 1;
// Clear kill and dead markers. LV will recompute them.
SmallVector<unsigned, 4> UseRegs;
SmallVector<unsigned, 4> DefRegs;
for (unsigned i = 0; i != NumOperandsToProcess; ++i) {
const MachineOperand &MO = MI->getOperand(i);
MachineOperand &MO = MI->getOperand(i);
if (!MO.isReg() || MO.getReg() == 0)
continue;
unsigned MOReg = MO.getReg();
if (MO.isUse())
if (MO.isUse()) {
MO.setIsKill(false);
UseRegs.push_back(MOReg);
if (MO.isDef())
} else /*MO.isDef()*/ {
MO.setIsDead(false);
DefRegs.push_back(MOReg);
}
}
// Process all uses.