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Fix ARMBaseInstrInfo::getInstrLatency for calls.

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Calls always clobber CPSR.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150831 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-02-17 19:07:59 +00:00
parent d9f0ff56a1
commit 8c3b87cf19
1 changed files with 1 additions and 1 deletions
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2
lib/Target/ARM/ARMBaseInstrInfo.cpp
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@ -2849,7 +2849,7 @@ int ARMBaseInstrInfo::getInstrLatency(const InstrItineraryData *ItinData,
const MCInstrDesc &MCID = MI->getDesc();
unsigned Class = MCID.getSchedClass();
unsigned UOps = ItinData->Itineraries[Class].NumMicroOps;
if (PredCost && MCID.hasImplicitDefOfPhysReg(ARM::CPSR))
if (PredCost && (MCID.isCall() || MCID.hasImplicitDefOfPhysReg(ARM::CPSR)))
// When predicated, CPSR is an additional source operand for CPSR updating
// instructions, this apparently increases their latencies.
*PredCost = 1;