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llvm-6502/utils/TableGen/SubtargetEmitter.cpp
Roman Divacky 98eb98b0f2 Constify subtarget info properly so that we dont cast away the const in 
the SubtargetInfoKV tables. Found by gcc48 -Wcast-qual.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163251 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-05 21:43:57 +00:00

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//===- SubtargetEmitter.cpp - Generate subtarget enumerations -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend emits subtarget enumerations.
//
//===----------------------------------------------------------------------===//
#include "CodeGenTarget.h"
#include "CodeGenSchedule.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/MC/MCInstrItineraries.h"
#include "llvm/Support/Debug.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/TableGenBackend.h"
#include <algorithm>
#include <map>
#include <string>
#include <vector>
using namespace llvm;
namespace {
class SubtargetEmitter {
RecordKeeper &Records;
CodeGenSchedModels &SchedModels;
std::string Target;
void Enumeration(raw_ostream &OS, const char *ClassName, bool isBits);
unsigned FeatureKeyValues(raw_ostream &OS);
unsigned CPUKeyValues(raw_ostream &OS);
void FormItineraryStageString(const std::string &Names,
Record *ItinData, std::string &ItinString,
unsigned &NStages);
void FormItineraryOperandCycleString(Record *ItinData, std::string &ItinString,
unsigned &NOperandCycles);
void FormItineraryBypassString(const std::string &Names,
Record *ItinData,
std::string &ItinString, unsigned NOperandCycles);
void EmitStageAndOperandCycleData(raw_ostream &OS,
std::vector<std::vector<InstrItinerary> >
&ProcItinLists);
void EmitItineraries(raw_ostream &OS,
std::vector<std::vector<InstrItinerary> >
&ProcItinLists);
void EmitProcessorProp(raw_ostream &OS, const Record *R, const char *Name,
char Separator);
void EmitProcessorModels(raw_ostream &OS);
void EmitProcessorLookup(raw_ostream &OS);
void EmitSchedModel(raw_ostream &OS);
void ParseFeaturesFunction(raw_ostream &OS, unsigned NumFeatures,
unsigned NumProcs);
public:
SubtargetEmitter(RecordKeeper &R, CodeGenTarget &TGT):
Records(R), SchedModels(TGT.getSchedModels()), Target(TGT.getName()) {}
void run(raw_ostream &o);
};
} // End anonymous namespace
//
// Enumeration - Emit the specified class as an enumeration.
//
void SubtargetEmitter::Enumeration(raw_ostream &OS,
const char *ClassName,
bool isBits) {
// Get all records of class and sort
std::vector<Record*> DefList = Records.getAllDerivedDefinitions(ClassName);
std::sort(DefList.begin(), DefList.end(), LessRecord());
unsigned N = DefList.size();
if (N == 0)
return;
if (N > 64) {
errs() << "Too many (> 64) subtarget features!\n";
exit(1);
}
OS << "namespace " << Target << " {\n";
// For bit flag enumerations with more than 32 items, emit constants.
// Emit an enum for everything else.
if (isBits && N > 32) {
// For each record
for (unsigned i = 0; i < N; i++) {
// Next record
Record *Def = DefList[i];
// Get and emit name and expression (1 << i)
OS << " const uint64_t " << Def->getName() << " = 1ULL << " << i << ";\n";
}
} else {
// Open enumeration
OS << "enum {\n";
// For each record
for (unsigned i = 0; i < N;) {
// Next record
Record *Def = DefList[i];
// Get and emit name
OS << " " << Def->getName();
// If bit flags then emit expression (1 << i)
if (isBits) OS << " = " << " 1ULL << " << i;
// Depending on 'if more in the list' emit comma
if (++i < N) OS << ",";
OS << "\n";
}
// Close enumeration
OS << "};\n";
}
OS << "}\n";
}
//
// FeatureKeyValues - Emit data of all the subtarget features. Used by the
// command line.
//
unsigned SubtargetEmitter::FeatureKeyValues(raw_ostream &OS) {
// Gather and sort all the features
std::vector<Record*> FeatureList =
Records.getAllDerivedDefinitions("SubtargetFeature");
if (FeatureList.empty())
return 0;
std::sort(FeatureList.begin(), FeatureList.end(), LessRecordFieldName());
// Begin feature table
OS << "// Sorted (by key) array of values for CPU features.\n"
<< "extern const llvm::SubtargetFeatureKV " << Target
<< "FeatureKV[] = {\n";
// For each feature
unsigned NumFeatures = 0;
for (unsigned i = 0, N = FeatureList.size(); i < N; ++i) {
// Next feature
Record *Feature = FeatureList[i];
const std::string &Name = Feature->getName();
const std::string &CommandLineName = Feature->getValueAsString("Name");
const std::string &Desc = Feature->getValueAsString("Desc");
if (CommandLineName.empty()) continue;
// Emit as { "feature", "description", featureEnum, i1 | i2 | ... | in }
OS << " { "
<< "\"" << CommandLineName << "\", "
<< "\"" << Desc << "\", "
<< Target << "::" << Name << ", ";
const std::vector<Record*> &ImpliesList =
Feature->getValueAsListOfDefs("Implies");
if (ImpliesList.empty()) {
OS << "0ULL";
} else {
for (unsigned j = 0, M = ImpliesList.size(); j < M;) {
OS << Target << "::" << ImpliesList[j]->getName();
if (++j < M) OS << " | ";
}
}
OS << " }";
++NumFeatures;
// Depending on 'if more in the list' emit comma
if ((i + 1) < N) OS << ",";
OS << "\n";
}
// End feature table
OS << "};\n";
return NumFeatures;
}
//
// CPUKeyValues - Emit data of all the subtarget processors. Used by command
// line.
//
unsigned SubtargetEmitter::CPUKeyValues(raw_ostream &OS) {
// Gather and sort processor information
std::vector<Record*> ProcessorList =
Records.getAllDerivedDefinitions("Processor");
std::sort(ProcessorList.begin(), ProcessorList.end(), LessRecordFieldName());
// Begin processor table
OS << "// Sorted (by key) array of values for CPU subtype.\n"
<< "extern const llvm::SubtargetFeatureKV " << Target
<< "SubTypeKV[] = {\n";
// For each processor
for (unsigned i = 0, N = ProcessorList.size(); i < N;) {
// Next processor
Record *Processor = ProcessorList[i];
const std::string &Name = Processor->getValueAsString("Name");
const std::vector<Record*> &FeatureList =
Processor->getValueAsListOfDefs("Features");
// Emit as { "cpu", "description", f1 | f2 | ... fn },
OS << " { "
<< "\"" << Name << "\", "
<< "\"Select the " << Name << " processor\", ";
if (FeatureList.empty()) {
OS << "0ULL";
} else {
for (unsigned j = 0, M = FeatureList.size(); j < M;) {
OS << Target << "::" << FeatureList[j]->getName();
if (++j < M) OS << " | ";
}
}
// The "0" is for the "implies" section of this data structure.
OS << ", 0ULL }";
// Depending on 'if more in the list' emit comma
if (++i < N) OS << ",";
OS << "\n";
}
// End processor table
OS << "};\n";
return ProcessorList.size();
}
//
// FormItineraryStageString - Compose a string containing the stage
// data initialization for the specified itinerary. N is the number
// of stages.
//
void SubtargetEmitter::FormItineraryStageString(const std::string &Name,
Record *ItinData,
std::string &ItinString,
unsigned &NStages) {
// Get states list
const std::vector<Record*> &StageList =
ItinData->getValueAsListOfDefs("Stages");
// For each stage
unsigned N = NStages = StageList.size();
for (unsigned i = 0; i < N;) {
// Next stage
const Record *Stage = StageList[i];
// Form string as ,{ cycles, u1 | u2 | ... | un, timeinc, kind }
int Cycles = Stage->getValueAsInt("Cycles");
ItinString += " { " + itostr(Cycles) + ", ";
// Get unit list
const std::vector<Record*> &UnitList = Stage->getValueAsListOfDefs("Units");
// For each unit
for (unsigned j = 0, M = UnitList.size(); j < M;) {
// Add name and bitwise or
ItinString += Name + "FU::" + UnitList[j]->getName();
if (++j < M) ItinString += " | ";
}
int TimeInc = Stage->getValueAsInt("TimeInc");
ItinString += ", " + itostr(TimeInc);
int Kind = Stage->getValueAsInt("Kind");
ItinString += ", (llvm::InstrStage::ReservationKinds)" + itostr(Kind);
// Close off stage
ItinString += " }";
if (++i < N) ItinString += ", ";
}
}
//
// FormItineraryOperandCycleString - Compose a string containing the
// operand cycle initialization for the specified itinerary. N is the
// number of operands that has cycles specified.
//
void SubtargetEmitter::FormItineraryOperandCycleString(Record *ItinData,
std::string &ItinString, unsigned &NOperandCycles) {
// Get operand cycle list
const std::vector<int64_t> &OperandCycleList =
ItinData->getValueAsListOfInts("OperandCycles");
// For each operand cycle
unsigned N = NOperandCycles = OperandCycleList.size();
for (unsigned i = 0; i < N;) {
// Next operand cycle
const int OCycle = OperandCycleList[i];
ItinString += " " + itostr(OCycle);
if (++i < N) ItinString += ", ";
}
}
void SubtargetEmitter::FormItineraryBypassString(const std::string &Name,
Record *ItinData,
std::string &ItinString,
unsigned NOperandCycles) {
const std::vector<Record*> &BypassList =
ItinData->getValueAsListOfDefs("Bypasses");
unsigned N = BypassList.size();
unsigned i = 0;
for (; i < N;) {
ItinString += Name + "Bypass::" + BypassList[i]->getName();
if (++i < NOperandCycles) ItinString += ", ";
}
for (; i < NOperandCycles;) {
ItinString += " 0";
if (++i < NOperandCycles) ItinString += ", ";
}
}
//
// EmitStageAndOperandCycleData - Generate unique itinerary stages and operand
// cycle tables. Create a list of InstrItinerary objects (ProcItinLists) indexed
// by CodeGenSchedClass::Index.
//
void SubtargetEmitter::
EmitStageAndOperandCycleData(raw_ostream &OS,
std::vector<std::vector<InstrItinerary> >
&ProcItinLists) {
// Multiple processor models may share an itinerary record. Emit it once.
SmallPtrSet<Record*, 8> ItinsDefSet;
// Emit functional units for all the itineraries.
for (CodeGenSchedModels::ProcIter PI = SchedModels.procModelBegin(),
PE = SchedModels.procModelEnd(); PI != PE; ++PI) {
if (!ItinsDefSet.insert(PI->ItinsDef))
continue;
std::vector<Record*> FUs = PI->ItinsDef->getValueAsListOfDefs("FU");
if (FUs.empty())
continue;
const std::string &Name = PI->ItinsDef->getName();
OS << "\n// Functional units for \"" << Name << "\"\n"
<< "namespace " << Name << "FU {\n";
for (unsigned j = 0, FUN = FUs.size(); j < FUN; ++j)
OS << " const unsigned " << FUs[j]->getName()
<< " = 1 << " << j << ";\n";
OS << "}\n";
std::vector<Record*> BPs = PI->ItinsDef->getValueAsListOfDefs("BP");
if (BPs.size()) {
OS << "\n// Pipeline forwarding pathes for itineraries \"" << Name
<< "\"\n" << "namespace " << Name << "Bypass {\n";
OS << " const unsigned NoBypass = 0;\n";
for (unsigned j = 0, BPN = BPs.size(); j < BPN; ++j)
OS << " const unsigned " << BPs[j]->getName()
<< " = 1 << " << j << ";\n";
OS << "}\n";
}
}
// Begin stages table
std::string StageTable = "\nextern const llvm::InstrStage " + Target +
"Stages[] = {\n";
StageTable += " { 0, 0, 0, llvm::InstrStage::Required }, // No itinerary\n";
// Begin operand cycle table
std::string OperandCycleTable = "extern const unsigned " + Target +
"OperandCycles[] = {\n";
OperandCycleTable += " 0, // No itinerary\n";
// Begin pipeline bypass table
std::string BypassTable = "extern const unsigned " + Target +
"ForwardingPaths[] = {\n";
BypassTable += " 0, // No itinerary\n";
// For each Itinerary across all processors, add a unique entry to the stages,
// operand cycles, and pipepine bypess tables. Then add the new Itinerary
// object with computed offsets to the ProcItinLists result.
unsigned StageCount = 1, OperandCycleCount = 1;
std::map<std::string, unsigned> ItinStageMap, ItinOperandMap;
for (CodeGenSchedModels::ProcIter PI = SchedModels.procModelBegin(),
PE = SchedModels.procModelEnd(); PI != PE; ++PI) {
const CodeGenProcModel &ProcModel = *PI;
// Add process itinerary to the list.
ProcItinLists.resize(ProcItinLists.size()+1);
// If this processor defines no itineraries, then leave the itinerary list
// empty.
std::vector<InstrItinerary> &ItinList = ProcItinLists.back();
if (ProcModel.ItinDefList.empty())
continue;
// Reserve index==0 for NoItinerary.
ItinList.resize(SchedModels.numItineraryClasses()+1);
const std::string &Name = ProcModel.ItinsDef->getName();
// For each itinerary data
for (unsigned SchedClassIdx = 0,
SchedClassEnd = ProcModel.ItinDefList.size();
SchedClassIdx < SchedClassEnd; ++SchedClassIdx) {
// Next itinerary data
Record *ItinData = ProcModel.ItinDefList[SchedClassIdx];
// Get string and stage count
std::string ItinStageString;
unsigned NStages = 0;
if (ItinData)
FormItineraryStageString(Name, ItinData, ItinStageString, NStages);
// Get string and operand cycle count
std::string ItinOperandCycleString;
unsigned NOperandCycles = 0;
std::string ItinBypassString;
if (ItinData) {
FormItineraryOperandCycleString(ItinData, ItinOperandCycleString,
NOperandCycles);
FormItineraryBypassString(Name, ItinData, ItinBypassString,
NOperandCycles);
}
// Check to see if stage already exists and create if it doesn't
unsigned FindStage = 0;
if (NStages > 0) {
FindStage = ItinStageMap[ItinStageString];
if (FindStage == 0) {
// Emit as { cycles, u1 | u2 | ... | un, timeinc }, // indices
StageTable += ItinStageString + ", // " + itostr(StageCount);
if (NStages > 1)
StageTable += "-" + itostr(StageCount + NStages - 1);
StageTable += "\n";
// Record Itin class number.
ItinStageMap[ItinStageString] = FindStage = StageCount;
StageCount += NStages;
}
}
// Check to see if operand cycle already exists and create if it doesn't
unsigned FindOperandCycle = 0;
if (NOperandCycles > 0) {
std::string ItinOperandString = ItinOperandCycleString+ItinBypassString;
FindOperandCycle = ItinOperandMap[ItinOperandString];
if (FindOperandCycle == 0) {
// Emit as cycle, // index
OperandCycleTable += ItinOperandCycleString + ", // ";
std::string OperandIdxComment = itostr(OperandCycleCount);
if (NOperandCycles > 1)
OperandIdxComment += "-"
+ itostr(OperandCycleCount + NOperandCycles - 1);
OperandCycleTable += OperandIdxComment + "\n";
// Record Itin class number.
ItinOperandMap[ItinOperandCycleString] =
FindOperandCycle = OperandCycleCount;
// Emit as bypass, // index
BypassTable += ItinBypassString + ", // " + OperandIdxComment + "\n";
OperandCycleCount += NOperandCycles;
}
}
// Set up itinerary as location and location + stage count
int NumUOps = ItinData ? ItinData->getValueAsInt("NumMicroOps") : 0;
InstrItinerary Intinerary = { NumUOps, FindStage, FindStage + NStages,
FindOperandCycle,
FindOperandCycle + NOperandCycles};
// Inject - empty slots will be 0, 0
ItinList[SchedClassIdx] = Intinerary;
}
}
// Closing stage
StageTable += " { 0, 0, 0, llvm::InstrStage::Required } // End stages\n";
StageTable += "};\n";
// Closing operand cycles
OperandCycleTable += " 0 // End operand cycles\n";
OperandCycleTable += "};\n";
BypassTable += " 0 // End bypass tables\n";
BypassTable += "};\n";
// Emit tables.
OS << StageTable;
OS << OperandCycleTable;
OS << BypassTable;
}
//
// EmitProcessorData - Generate data for processor itineraries that were
// computed during EmitStageAndOperandCycleData(). ProcItinLists lists all
// Itineraries for each processor. The Itinerary lists are indexed on
// CodeGenSchedClass::Index.
//
void SubtargetEmitter::
EmitItineraries(raw_ostream &OS,
std::vector<std::vector<InstrItinerary> > &ProcItinLists) {
// Multiple processor models may share an itinerary record. Emit it once.
SmallPtrSet<Record*, 8> ItinsDefSet;
// For each processor's machine model
std::vector<std::vector<InstrItinerary> >::iterator
ProcItinListsIter = ProcItinLists.begin();
for (CodeGenSchedModels::ProcIter PI = SchedModels.procModelBegin(),
PE = SchedModels.procModelEnd(); PI != PE; ++PI) {
Record *ItinsDef = PI->ItinsDef;
if (!ItinsDefSet.insert(ItinsDef))
continue;
// Get processor itinerary name
const std::string &Name = ItinsDef->getName();
// Get the itinerary list for the processor.
assert(ProcItinListsIter != ProcItinLists.end() && "bad iterator");
std::vector<InstrItinerary> &ItinList = *ProcItinListsIter++;
OS << "\n";
OS << "static const llvm::InstrItinerary ";
if (ItinList.empty()) {
OS << '*' << Name << " = 0;\n";
continue;
}
// Begin processor itinerary table
OS << Name << "[] = {\n";
// For each itinerary class in CodeGenSchedClass::Index order.
for (unsigned j = 0, M = ItinList.size(); j < M; ++j) {
InstrItinerary &Intinerary = ItinList[j];
// Emit Itinerary in the form of
// { firstStage, lastStage, firstCycle, lastCycle } // index
OS << " { " <<
Intinerary.NumMicroOps << ", " <<
Intinerary.FirstStage << ", " <<
Intinerary.LastStage << ", " <<
Intinerary.FirstOperandCycle << ", " <<
Intinerary.LastOperandCycle << " }" <<
", // " << j << " " << SchedModels.getSchedClass(j).Name << "\n";
}
// End processor itinerary table
OS << " { 0, ~0U, ~0U, ~0U, ~0U } // end marker\n";
OS << "};\n";
}
}
// Emit either the value defined in the TableGen Record, or the default
// value defined in the C++ header. The Record is null if the processor does not
// define a model.
void SubtargetEmitter::EmitProcessorProp(raw_ostream &OS, const Record *R,
const char *Name, char Separator) {
OS << " ";
int V = R ? R->getValueAsInt(Name) : -1;
if (V >= 0)
OS << V << Separator << " // " << Name;
else
OS << "MCSchedModel::Default" << Name << Separator;
OS << '\n';
}
void SubtargetEmitter::EmitProcessorModels(raw_ostream &OS) {
// For each processor model.
for (CodeGenSchedModels::ProcIter PI = SchedModels.procModelBegin(),
PE = SchedModels.procModelEnd(); PI != PE; ++PI) {
// Skip default
// Begin processor itinerary properties
OS << "\n";
OS << "static const llvm::MCSchedModel " << PI->ModelName << "(\n";
EmitProcessorProp(OS, PI->ModelDef, "IssueWidth", ',');
EmitProcessorProp(OS, PI->ModelDef, "MinLatency", ',');
EmitProcessorProp(OS, PI->ModelDef, "LoadLatency", ',');
EmitProcessorProp(OS, PI->ModelDef, "HighLatency", ',');
EmitProcessorProp(OS, PI->ModelDef, "MispredictPenalty", ',');
if (SchedModels.hasItineraryClasses())
OS << " " << PI->ItinsDef->getName();
else
OS << " 0";
OS << ");\n";
}
}
//
// EmitProcessorLookup - generate cpu name to itinerary lookup table.
//
void SubtargetEmitter::EmitProcessorLookup(raw_ostream &OS) {
// Gather and sort processor information
std::vector<Record*> ProcessorList =
Records.getAllDerivedDefinitions("Processor");
std::sort(ProcessorList.begin(), ProcessorList.end(), LessRecordFieldName());
// Begin processor table
OS << "\n";
OS << "// Sorted (by key) array of itineraries for CPU subtype.\n"
<< "extern const llvm::SubtargetInfoKV "
<< Target << "ProcSchedKV[] = {\n";
// For each processor
for (unsigned i = 0, N = ProcessorList.size(); i < N;) {
// Next processor
Record *Processor = ProcessorList[i];
const std::string &Name = Processor->getValueAsString("Name");
const std::string &ProcModelName =
SchedModels.getProcModel(Processor).ModelName;
// Emit as { "cpu", procinit },
OS << " { "
<< "\"" << Name << "\", "
<< "(const void *)&" << ProcModelName;
OS << " }";
// Depending on ''if more in the list'' emit comma
if (++i < N) OS << ",";
OS << "\n";
}
// End processor table
OS << "};\n";
}
//
// EmitSchedModel - Emits all scheduling model tables, folding common patterns.
//
void SubtargetEmitter::EmitSchedModel(raw_ostream &OS) {
if (SchedModels.hasItineraryClasses()) {
std::vector<std::vector<InstrItinerary> > ProcItinLists;
// Emit the stage data
EmitStageAndOperandCycleData(OS, ProcItinLists);
EmitItineraries(OS, ProcItinLists);
}
// Emit the processor machine model
EmitProcessorModels(OS);
// Emit the processor lookup data
EmitProcessorLookup(OS);
}
//
// ParseFeaturesFunction - Produces a subtarget specific function for parsing
// the subtarget features string.
//
void SubtargetEmitter::ParseFeaturesFunction(raw_ostream &OS,
unsigned NumFeatures,
unsigned NumProcs) {
std::vector<Record*> Features =
Records.getAllDerivedDefinitions("SubtargetFeature");
std::sort(Features.begin(), Features.end(), LessRecord());
OS << "// ParseSubtargetFeatures - Parses features string setting specified\n"
<< "// subtarget options.\n"
<< "void llvm::";
OS << Target;
OS << "Subtarget::ParseSubtargetFeatures(StringRef CPU, StringRef FS) {\n"
<< " DEBUG(dbgs() << \"\\nFeatures:\" << FS);\n"
<< " DEBUG(dbgs() << \"\\nCPU:\" << CPU << \"\\n\\n\");\n";
if (Features.empty()) {
OS << "}\n";
return;
}
OS << " uint64_t Bits = ReInitMCSubtargetInfo(CPU, FS);\n";
for (unsigned i = 0; i < Features.size(); i++) {
// Next record
Record *R = Features[i];
const std::string &Instance = R->getName();
const std::string &Value = R->getValueAsString("Value");
const std::string &Attribute = R->getValueAsString("Attribute");
if (Value=="true" || Value=="false")
OS << " if ((Bits & " << Target << "::"
<< Instance << ") != 0) "
<< Attribute << " = " << Value << ";\n";
else
OS << " if ((Bits & " << Target << "::"
<< Instance << ") != 0 && "
<< Attribute << " < " << Value << ") "
<< Attribute << " = " << Value << ";\n";
}
OS << "}\n";
}
//
// SubtargetEmitter::run - Main subtarget enumeration emitter.
//
void SubtargetEmitter::run(raw_ostream &OS) {
emitSourceFileHeader("Subtarget Enumeration Source Fragment", OS);
OS << "\n#ifdef GET_SUBTARGETINFO_ENUM\n";
OS << "#undef GET_SUBTARGETINFO_ENUM\n";
OS << "namespace llvm {\n";
Enumeration(OS, "SubtargetFeature", true);
OS << "} // End llvm namespace \n";
OS << "#endif // GET_SUBTARGETINFO_ENUM\n\n";
OS << "\n#ifdef GET_SUBTARGETINFO_MC_DESC\n";
OS << "#undef GET_SUBTARGETINFO_MC_DESC\n";
OS << "namespace llvm {\n";
#if 0
OS << "namespace {\n";
#endif
unsigned NumFeatures = FeatureKeyValues(OS);
OS << "\n";
unsigned NumProcs = CPUKeyValues(OS);
OS << "\n";
EmitSchedModel(OS);
OS << "\n";
#if 0
OS << "}\n";
#endif
// MCInstrInfo initialization routine.
OS << "static inline void Init" << Target
<< "MCSubtargetInfo(MCSubtargetInfo *II, "
<< "StringRef TT, StringRef CPU, StringRef FS) {\n";
OS << " II->InitMCSubtargetInfo(TT, CPU, FS, ";
if (NumFeatures)
OS << Target << "FeatureKV, ";
else
OS << "0, ";
if (NumProcs)
OS << Target << "SubTypeKV, ";
else
OS << "0, ";
if (SchedModels.hasItineraryClasses()) {
OS << Target << "ProcSchedKV, "
<< Target << "Stages, "
<< Target << "OperandCycles, "
<< Target << "ForwardingPaths, ";
} else
OS << "0, 0, 0, 0, ";
OS << NumFeatures << ", " << NumProcs << ");\n}\n\n";
OS << "} // End llvm namespace \n";
OS << "#endif // GET_SUBTARGETINFO_MC_DESC\n\n";
OS << "\n#ifdef GET_SUBTARGETINFO_TARGET_DESC\n";
OS << "#undef GET_SUBTARGETINFO_TARGET_DESC\n";
OS << "#include \"llvm/Support/Debug.h\"\n";
OS << "#include \"llvm/Support/raw_ostream.h\"\n";
ParseFeaturesFunction(OS, NumFeatures, NumProcs);
OS << "#endif // GET_SUBTARGETINFO_TARGET_DESC\n\n";
// Create a TargetSubtargetInfo subclass to hide the MC layer initialization.
OS << "\n#ifdef GET_SUBTARGETINFO_HEADER\n";
OS << "#undef GET_SUBTARGETINFO_HEADER\n";
std::string ClassName = Target + "GenSubtargetInfo";
OS << "namespace llvm {\n";
OS << "class DFAPacketizer;\n";
OS << "struct " << ClassName << " : public TargetSubtargetInfo {\n"
<< " explicit " << ClassName << "(StringRef TT, StringRef CPU, "
<< "StringRef FS);\n"
<< "public:\n"
<< " DFAPacketizer *createDFAPacketizer(const InstrItineraryData *IID)"
<< " const;\n"
<< "};\n";
OS << "} // End llvm namespace \n";
OS << "#endif // GET_SUBTARGETINFO_HEADER\n\n";
OS << "\n#ifdef GET_SUBTARGETINFO_CTOR\n";
OS << "#undef GET_SUBTARGETINFO_CTOR\n";
OS << "namespace llvm {\n";
OS << "extern const llvm::SubtargetFeatureKV " << Target << "FeatureKV[];\n";
OS << "extern const llvm::SubtargetFeatureKV " << Target << "SubTypeKV[];\n";
if (SchedModels.hasItineraryClasses()) {
OS << "extern const llvm::SubtargetInfoKV " << Target << "ProcSchedKV[];\n";
OS << "extern const llvm::InstrStage " << Target << "Stages[];\n";
OS << "extern const unsigned " << Target << "OperandCycles[];\n";
OS << "extern const unsigned " << Target << "ForwardingPaths[];\n";
}
OS << ClassName << "::" << ClassName << "(StringRef TT, StringRef CPU, "
<< "StringRef FS)\n"
<< " : TargetSubtargetInfo() {\n"
<< " InitMCSubtargetInfo(TT, CPU, FS, ";
if (NumFeatures)
OS << Target << "FeatureKV, ";
else
OS << "0, ";
if (NumProcs)
OS << Target << "SubTypeKV, ";
else
OS << "0, ";
if (SchedModels.hasItineraryClasses()) {
OS << Target << "ProcSchedKV, "
<< Target << "Stages, "
<< Target << "OperandCycles, "
<< Target << "ForwardingPaths, ";
} else
OS << "0, 0, 0, 0, ";
OS << NumFeatures << ", " << NumProcs << ");\n}\n\n";
OS << "} // End llvm namespace \n";
OS << "#endif // GET_SUBTARGETINFO_CTOR\n\n";
}
namespace llvm {
void EmitSubtarget(RecordKeeper &RK, raw_ostream &OS) {
CodeGenTarget CGTarget(RK);
SubtargetEmitter(RK, CGTarget).run(OS);
}
} // End llvm namespace
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