From cb7947b81be4cb55fc647ea3722eb7a8613545cb Mon Sep 17 00:00:00 2001 From: Andrew Trick Date: Thu, 23 Dec 2010 03:43:21 +0000 Subject: [PATCH] In CheckForLiveRegDef use TRI->getOverlaps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122473 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp index 793fa3d5998..21227950d02 100644 --- a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp +++ b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp @@ -659,15 +659,18 @@ static void CheckForLiveRegDef(SUnit *SU, unsigned Reg, SmallSet &RegAdded, SmallVector &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