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

llvm-svn: 99597
This commit is contained in:
Evan Cheng 2010-03-26 02:12:24 +00:00
parent a5beaf6958
commit eb50ac5ccc
2 changed files with 8 additions and 6 deletions
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10
llvm/lib/CodeGen/LiveVariables.cpp
View File

@ -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.

4
llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
View File

@ -640,9 +640,7 @@ EmitMachineNode(SDNode *Node, bool IsClone, bool IsCloned,
// If the instruction has implicit defs and the node doesn't, mark the
// implicit def as dead. If the node has any flag outputs, we don't do this
// because we don't know what implicit defs are being used by flagged nodes.
if (Node->getValueType(Node->getNumValues()-1) != MVT::Flag &&
// FIXME: This is a terrible hackaround for a liveintervals bug.
II.getNumImplicitDefs() < 8)
if (Node->getValueType(Node->getNumValues()-1) != MVT::Flag)
if (const unsigned *IDList = II.getImplicitDefs()) {
for (unsigned i = NumResults, e = II.getNumDefs()+II.getNumImplicitDefs();
i != e; ++i)