In CheckForLiveRegDef use TRI->getOverlaps.
llvm-svn: 122473
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
index 793fa3d..2122795 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
@@ -659,15 +659,18 @@
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