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TargetSchedule: factor out common code; NFC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237376 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2015-05-14 18:01:13 +00:00
parent e9c8191eeb
commit be4ab8dafe
2 changed files with 20 additions and 21 deletions
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3
include/llvm/CodeGen/TargetSchedule.h
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@ -40,6 +40,9 @@ class TargetSchedModel {
SmallVector<unsigned, 16> ResourceFactors; SmallVector<unsigned, 16> ResourceFactors;
unsigned MicroOpFactor; // Multiply to normalize microops to resource units. unsigned MicroOpFactor; // Multiply to normalize microops to resource units.
unsigned ResourceLCM; // Resource units per cycle. Latency normalization factor. unsigned ResourceLCM; // Resource units per cycle. Latency normalization factor.
unsigned computeInstrLatency(const MCSchedClassDesc &SCDesc) const;
public: public:
TargetSchedModel(): SchedModel(MCSchedModel::GetDefaultSchedModel()), STI(nullptr), TII(nullptr) {} TargetSchedModel(): SchedModel(MCSchedModel::GetDefaultSchedModel()), STI(nullptr), TII(nullptr) {}

38
lib/CodeGen/TargetSchedule.cpp
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@ -224,6 +224,19 @@ unsigned TargetSchedModel::computeOperandLatency(
return DefMI->isTransient() ? 0 : TII->defaultDefLatency(SchedModel, DefMI); return DefMI->isTransient() ? 0 : TII->defaultDefLatency(SchedModel, DefMI);
} }
unsigned
TargetSchedModel::computeInstrLatency(const MCSchedClassDesc &SCDesc) const {
unsigned Latency = 0;
for (unsigned DefIdx = 0, DefEnd = SCDesc.NumWriteLatencyEntries;
DefIdx != DefEnd; ++DefIdx) {
// Lookup the definition's write latency in SubtargetInfo.
const MCWriteLatencyEntry *WLEntry =
STI->getWriteLatencyEntry(&SCDesc, DefIdx);
Latency = std::max(Latency, capLatency(WLEntry->Cycles));
}
return Latency;
}
unsigned TargetSchedModel::computeInstrLatency(unsigned Opcode) const { unsigned TargetSchedModel::computeInstrLatency(unsigned Opcode) const {
assert(hasInstrSchedModel() && "Only call this function with a SchedModel"); assert(hasInstrSchedModel() && "Only call this function with a SchedModel");
@ -231,16 +244,8 @@ unsigned TargetSchedModel::computeInstrLatency(unsigned Opcode) const {
const MCSchedClassDesc *SCDesc = SchedModel.getSchedClassDesc(SCIdx); const MCSchedClassDesc *SCDesc = SchedModel.getSchedClassDesc(SCIdx);
unsigned Latency = 0; unsigned Latency = 0;
if (SCDesc->isValid() && !SCDesc->isVariant()) { if (SCDesc->isValid() && !SCDesc->isVariant())
for (unsigned DefIdx = 0, DefEnd = SCDesc->NumWriteLatencyEntries; return computeInstrLatency(*SCDesc);
DefIdx != DefEnd; ++DefIdx) {
// Lookup the definition's write latency in SubtargetInfo.
const MCWriteLatencyEntry *WLEntry =
STI->getWriteLatencyEntry(SCDesc, DefIdx);
Latency = std::max(Latency, capLatency(WLEntry->Cycles));
}
return Latency;
}
assert(Latency && "No MI sched latency"); assert(Latency && "No MI sched latency");
return 0; return 0;
@ -257,17 +262,8 @@ TargetSchedModel::computeInstrLatency(const MachineInstr *MI,
if (hasInstrSchedModel()) { if (hasInstrSchedModel()) {
const MCSchedClassDesc *SCDesc = resolveSchedClass(MI); const MCSchedClassDesc *SCDesc = resolveSchedClass(MI);
if (SCDesc->isValid()) { if (SCDesc->isValid())
unsigned Latency = 0; return computeInstrLatency(*SCDesc);
for (unsigned DefIdx = 0, DefEnd = SCDesc->NumWriteLatencyEntries;
DefIdx != DefEnd; ++DefIdx) {
// Lookup the definition's write latency in SubtargetInfo.
const MCWriteLatencyEntry *WLEntry =
STI->getWriteLatencyEntry(SCDesc, DefIdx);
Latency = std::max(Latency, capLatency(WLEntry->Cycles));
}
return Latency;
}
} }
return TII->defaultDefLatency(SchedModel, MI); return TII->defaultDefLatency(SchedModel, MI);
} }