diff options
Diffstat (limited to 'llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp index a839edd6f4b..c111261acf4 100644 --- a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -349,10 +349,9 @@ bool SimpleRegisterCoalescing::RemoveCopyByCommutingDef(const CoalescerPair &CP, VNInfo *AValNo = ALR->valno; // If other defs can reach uses of this def, then it's not safe to perform // the optimization. - MachineInstr *DefMI = li_->getInstructionFromIndex(AValNo->def); - if (AValNo->isPHIDef() || DefMI == 0 || AValNo->isUnused() || - AValNo->hasPHIKill()) + if (AValNo->isPHIDef() || AValNo->isUnused() || AValNo->hasPHIKill()) return false; + MachineInstr *DefMI = li_->getInstructionFromIndex(AValNo->def); if (!DefMI) return false; const TargetInstrDesc &TID = DefMI->getDesc(); @@ -649,10 +648,11 @@ bool SimpleRegisterCoalescing::ReMaterializeTrivialDef(LiveInterval &SrcInt, VNInfo *ValNo = SrcLR->valno; // If other defs can reach uses of this def, then it's not safe to perform // the optimization. - if (ValNo->isPHIDef() || li_->getInstructionFromIndex(ValNo->def)==0 || - ValNo->isUnused() || ValNo->hasPHIKill()) + if (ValNo->isPHIDef() || ValNo->isUnused() || ValNo->hasPHIKill()) return false; MachineInstr *DefMI = li_->getInstructionFromIndex(ValNo->def); + if (!DefMI) + return false; assert(DefMI && "Defining instruction disappeared"); const TargetInstrDesc &TID = DefMI->getDesc(); if (!TID.isAsCheapAsAMove()) |
