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[X86] Generalize X86FixupLEAs to work with TargetSchedModel 

Similar to rL329834, don't rely on itinerary scheduler model to determine latencies for LEA thresholds, use the generic TargetSchedModel::computeInstrLatency call.

llvm-svn: 330030
This commit is contained in:
Simon Pilgrim 2018-04-13 15:09:39 +00:00
parent 5b63803d1f
commit a3a9d81231
1 changed files with 4 additions and 3 deletions
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7
llvm/lib/Target/X86/X86FixupLEAs.cpp
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@ -20,7 +20,7 @@
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetSchedule.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
@ -125,6 +125,7 @@ public:
}
private:
TargetSchedModel TSM;
MachineFunction *MF;
const X86InstrInfo *TII; // Machine instruction info.
bool OptIncDec;
@ -202,6 +203,7 @@ bool FixupLEAPass::runOnMachineFunction(MachineFunction &Func) {
if (!OptLEA && !OptIncDec)
return false;
TSM.init(&Func.getSubtarget());
TII = ST.getInstrInfo();
DEBUG(dbgs() << "Start X86FixupLEAs\n";);
@ -264,8 +266,7 @@ FixupLEAPass::searchBackwards(MachineOperand &p, MachineBasicBlock::iterator &I,
if (usesRegister(p, CurInst) == RU_Write) {
return CurInst;
}
InstrDistance += TII->getInstrLatency(
MF->getSubtarget().getInstrItineraryData(), *CurInst);
InstrDistance += TSM.computeInstrLatency(&*CurInst);
Found = getPreviousInstr(CurInst, MFI);
}
return MachineBasicBlock::iterator();