diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/ScheduleDAGInstrs.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp index d8d8422f0ed..ec376e8e7bb 100644 --- a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp +++ b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp @@ -310,9 +310,15 @@ void ScheduleDAGInstrs::addPhysRegDeps(SUnit *SU, unsigned OperIdx) { SUnit *DefSU = I->SU; if (DefSU == &ExitSU) continue; + auto IsDefDead = [this](SUnit *DefSU, unsigned Reg) { + for (MCSubRegIterator SR(Reg, TRI, true); SR.isValid(); ++SR) + if (!DefSU->getInstr()->registerDefIsDead(*SR)) + return false; + return true; + }; if (DefSU != SU && (Kind != SDep::Output || !MO.isDead() || - !DefSU->getInstr()->registerDefIsDead(*Alias))) { + !IsDefDead(DefSU, *Alias))) { if (Kind == SDep::Anti) DefSU->addPred(SDep(SU, Kind, /*Reg=*/*Alias)); else { |
