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In CheckForLiveRegDef use TRI->getOverlaps.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122473 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2010-12-23 03:43:21 +00:00
parent 1b1658741a
commit cb7947b81b
1 changed files with 9 additions and 6 deletions
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15
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
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@ -659,15 +659,18 @@ static void CheckForLiveRegDef(SUnit *SU, unsigned Reg,
SmallSet<unsigned, 4> &RegAdded,
SmallVector<unsigned, 4> &LRegs,
const TargetRegisterInfo *TRI) {
if (LiveRegDefs[Reg] && LiveRegDefs[Reg] != SU) {
for (const unsigned *AliasI = TRI->getOverlaps(Reg); *AliasI; ++AliasI) {
// Check if Ref is live.
if (!LiveRegDefs[Reg]) continue;
// Allow multiple uses of the same def.
if (LiveRegDefs[Reg] == SU) continue;
// Add Reg to the set of interfering live regs.
if (RegAdded.insert(Reg))
LRegs.push_back(Reg);
}
for (const unsigned *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias)
if (LiveRegDefs[*Alias] && LiveRegDefs[*Alias] != SU) {
if (RegAdded.insert(*Alias))
LRegs.push_back(*Alias);
}
}
/// DelayForLiveRegsBottomUp - Returns true if it is necessary to delay