diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp index 5a2f200303..9c03b4e5b0 100644 --- a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp +++ b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp @@ -1308,8 +1308,11 @@ void BURegReductionPriorityQueue<SF>::AddPseudoTwoAddrDeps() { // plus it may increase register pressures. if (SuccSU == SU || SuccSU->hasPhysRegDefs) continue; - // Be conservative. Ignore if nodes aren't at the same depth. - if (SuccSU->Depth != SU->Depth) + // Be conservative. Ignore if nodes aren't at roughly the same + // depth and height. + if (SuccSU->Height < SU->Height && (SU->Height - SuccSU->Height) > 1) + continue; + if (SuccSU->Depth > SU->Depth && (SuccSU->Depth - SU->Depth) > 1) continue; if (!SuccSU->Node || !SuccSU->Node->isTargetOpcode()) continue; |