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Fix ARM getInstrLatency logic to work with the current API.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158161 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-06-07 19:41:55 +00:00
parent e6fc9d40b3
commit ed7a51e692
1 changed files with 19 additions and 13 deletions
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32
lib/Target/ARM/ARMBaseInstrInfo.cpp
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@ -2592,7 +2592,7 @@ ARMBaseInstrInfo::getOperandLatency(const InstrItineraryData *ItinData,
return 0;
// Otherwise it takes the instruction latency (generally one).
int Latency = getInstrLatency(ItinData, DefMI);
unsigned Latency = getInstrLatency(ItinData, DefMI);
// For Thumb2 and -Os, prefer scheduling CPSR setting instruction close to
// its uses. Instructions which are otherwise scheduled between them may
@ -2991,13 +2991,10 @@ unsigned ARMBaseInstrInfo::getInstrLatency(const InstrItineraryData *ItinData,
MI->isRegSequence() || MI->isImplicitDef())
return 1;
// Be sure to call getStageLatency for an empty itinerary in case it has a
// valid MinLatency property.
if (!ItinData)
return 1;
// An instruction scheduler typically runs on unbundled instructions, however
// other passes may query the latency of a bundled instruction.
if (MI->isBundle()) {
int Latency = 0;
unsigned Latency = 0;
MachineBasicBlock::const_instr_iterator I = MI;
MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
while (++I != E && I->isInsideBundle()) {
@ -3008,15 +3005,24 @@ unsigned ARMBaseInstrInfo::getInstrLatency(const InstrItineraryData *ItinData,
}
const MCInstrDesc &MCID = MI->getDesc();
unsigned Class = MCID.getSchedClass();
unsigned UOps = ItinData->Itineraries[Class].NumMicroOps;
if (PredCost && (MCID.isCall() || 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;
if (UOps)
return ItinData->getStageLatency(Class);
return getNumMicroOps(ItinData, MI);
}
// Be sure to call getStageLatency for an empty itinerary in case it has a
// valid MinLatency property.
if (!ItinData)
return MI->mayLoad() ? 3 : 1;
unsigned Class = MCID.getSchedClass();
// For instructions with variable uops, use uops as latency.
if (!ItinData->isEmpty() && !ItinData->Itineraries[Class].NumMicroOps) {
return getNumMicroOps(ItinData, MI);
}
// For the common case, fall back on the itinerary's latency.
return ItinData->getStageLatency(Class);
}
int ARMBaseInstrInfo::getInstrLatency(const InstrItineraryData *ItinData,