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Remove dead code; added a missing null ptr check.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31478 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-11-06 21:33:46 +00:00
parent 8c97c07040
commit d5ad440f43
1 changed files with 1 additions and 32 deletions
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33
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
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@ -685,7 +685,6 @@ bool BURegReductionPriorityQueue<SF>::canClobber(SUnit *SU, SUnit *Op) {
/// first (lower in the schedule).
template<class SF>
void BURegReductionPriorityQueue<SF>::AddPseudoTwoAddrDeps() {
#if 1
for (unsigned i = 0, e = SUnits->size(); i != e; ++i) {
SUnit *SU = (SUnit *)&((*SUnits)[i]);
if (!SU->isTwoAddress)
@ -703,6 +702,7 @@ void BURegReductionPriorityQueue<SF>::AddPseudoTwoAddrDeps() {
TargetInstrInfo::TIED_TO) != -1) {
SDNode *DU = SU->Node->getOperand(j).Val;
SUnit *DUSU = (*SUnitMap)[DU];
if (!DUSU) continue;
for (SUnit::succ_iterator I = DUSU->Succs.begin(),E = DUSU->Succs.end();
I != E; ++I) {
if (I->second) continue;
@ -723,37 +723,6 @@ void BURegReductionPriorityQueue<SF>::AddPseudoTwoAddrDeps() {
}
}
}
#else
for (unsigned i = 0, e = SUnits->size(); i != e; ++i) {
SUnit *SU = (SUnit *)&((*SUnits)[i]);
SDNode *Node = SU->Node;
if (!Node->isTargetOpcode())
continue;
if (SU->isTwoAddress) {
SUnit *DUSU = getDefUsePredecessor(SU, TII);
if (!DUSU) continue;
for (SUnit::succ_iterator I = DUSU->Succs.begin(), E = DUSU->Succs.end();
I != E; ++I) {
if (I->second) continue;
SUnit *SuccSU = I->first;
if (SuccSU != SU &&
(!canClobber(SuccSU, DUSU, TII) ||
(!SU->isCommutable && SuccSU->isCommutable))){
if (SuccSU->Depth == SU->Depth && !isReachable(SuccSU, SU)) {
DEBUG(std::cerr << "Adding an edge from SU # " << SU->NodeNum
<< " to SU #" << SuccSU->NodeNum << "\n");
if (SU->addPred(SuccSU, true))
SU->NumChainPredsLeft++;
if (SuccSU->addSucc(SU, true))
SuccSU->NumChainSuccsLeft++;
}
}
}
}
}
#endif
}
/// CalcNodePriority - Priority is the Sethi Ullman number.