diff options
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index 0b5b2437ab..8399cd5ff4 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1892,7 +1892,13 @@ ARMBaseInstrInfo::getOperandLatency(const InstrItineraryData *ItinData, if (!ItinData || ItinData->isEmpty()) return DefTID.mayLoad() ? 3 : 1; + const TargetInstrDesc &UseTID = UseMI->getDesc(); + const MachineOperand &DefMO = DefMI->getOperand(DefIdx); + if (DefMO.getReg() == ARM::CPSR && UseTID.isBranch()) + // CPSR set and branch can be paired in the same cycle. + return 0; + unsigned DefAlign = DefMI->hasOneMemOperand() ? (*DefMI->memoperands_begin())->getAlignment() : 0; unsigned UseAlign = UseMI->hasOneMemOperand() |