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//===- SubtargetEmitter.cpp - Generate subtarget enumerations -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by James M. Laskey and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tablegen backend emits subtarget enumerations.
//
//===----------------------------------------------------------------------===//
#include "SubtargetEmitter.h"
#include "CodeGenTarget.h"
#include "Record.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Debug.h"
#include <algorithm>
#include <set>
using namespace llvm;
//
// Convenience types.
//
typedef std::vector<Record*> RecordList;
typedef std::vector<Record*>::iterator RecordListIter;
//
// Record sort by name function.
//
struct LessRecord {
bool operator()(const Record *Rec1, const Record *Rec2) const {
return Rec1->getName() < Rec2->getName();
}
};
//
// Record sort by field "Name" function.
//
struct LessRecordFieldName {
bool operator()(const Record *Rec1, const Record *Rec2) const {
return Rec1->getValueAsString("Name") < Rec2->getValueAsString("Name");
}
};
//
// Enumeration - Emit the specified class as an enumeration.
//
void SubtargetEmitter::Enumeration(std::ostream &OS,
const char *ClassName,
bool isBits) {
RecordList Defs = Records.getAllDerivedDefinitions(ClassName);
sort(Defs.begin(), Defs.end(), LessRecord());
int i = 0;
OS << "enum {\n";
for (RecordListIter RI = Defs.begin(), E = Defs.end(); RI != E;) {
Record *R = *RI++;
std::string Instance = R->getName();
OS << " "
<< Instance;
if (isBits) {
OS << " = "
<< " 1 << " << i++;
}
OS << ((RI != E) ? ",\n" : "\n");
}
OS << "};\n";
}
//
// FeatureKeyValues - Emit data of all the subtarget features. Used by command
// line.
//
void SubtargetEmitter::FeatureKeyValues(std::ostream &OS) {
RecordList Features = Records.getAllDerivedDefinitions("SubtargetFeature");
sort(Features.begin(), Features.end(), LessRecord());
OS << "// Sorted (by key) array of values for CPU features.\n"
<< "static llvm::SubtargetFeatureKV FeatureKV[] = {\n";
for (RecordListIter RI = Features.begin(), E = Features.end(); RI != E;) {
Record *R = *RI++;
std::string Instance = R->getName();
std::string Name = R->getValueAsString("Name");
std::string Desc = R->getValueAsString("Desc");
OS << " { "
<< "\"" << Name << "\", "
<< "\"" << Desc << "\", "
<< Instance
<< ((RI != E) ? " },\n" : " }\n");
}
OS << "};\n";
OS<<"\nenum {\n";
OS<<" FeatureKVSize = sizeof(FeatureKV)/sizeof(llvm::SubtargetFeatureKV)\n";
OS<<"};\n";
}
//
// CPUKeyValues - Emit data of all the subtarget processors. Used by command
// line.
//
void SubtargetEmitter::CPUKeyValues(std::ostream &OS) {
RecordList Processors = Records.getAllDerivedDefinitions("Processor");
sort(Processors.begin(), Processors.end(), LessRecordFieldName());
OS << "// Sorted (by key) array of values for CPU subtype.\n"
<< "static const llvm::SubtargetFeatureKV SubTypeKV[] = {\n";
for (RecordListIter RI = Processors.begin(), E = Processors.end();
RI != E;) {
Record *R = *RI++;
std::string Name = R->getValueAsString("Name");
Record *ProcItin = R->getValueAsDef("ProcItin");
ListInit *Features = R->getValueAsListInit("Features");
unsigned N = Features->getSize();
OS << " { "
<< "\"" << Name << "\", "
<< "\"Select the " << Name << " processor\", ";
if (N == 0) {
OS << "0";
} else {
for (unsigned i = 0; i < N; ) {
if (DefInit *DI = dynamic_cast<DefInit*>(Features->getElement(i++))) {
Record *Feature = DI->getDef();
std::string Name = Feature->getName();
OS << Name;
if (i != N) OS << " | ";
} else {
throw "Feature: " + Name +
" expected feature in processor feature list!";
}
}
}
OS << ((RI != E) ? " },\n" : " }\n");
}
OS << "};\n";
OS<<"\nenum {\n";
OS<<" SubTypeKVSize = sizeof(SubTypeKV)/sizeof(llvm::SubtargetFeatureKV)\n";
OS<<"};\n";
}
//
// ParseFeaturesFunction - Produces a subtarget specific function for parsing
// the subtarget features string.
//
void SubtargetEmitter::ParseFeaturesFunction(std::ostream &OS) {
RecordList Features = Records.getAllDerivedDefinitions("SubtargetFeature");
sort(Features.begin(), Features.end(), LessRecord());
OS << "// ParseSubtargetFeatures - Parses features string setting specified\n"
"// subtarget options.\n"
"void llvm::";
OS << Target;
OS << "Subtarget::ParseSubtargetFeatures(const std::string &FS,\n"
" const std::string &CPU) {\n"
" SubtargetFeatures Features(FS);\n"
" Features.setCPUIfNone(CPU);\n"
" uint32_t Bits = Features.getBits(SubTypeKV, SubTypeKVSize,\n"
" FeatureKV, FeatureKVSize);\n";
for (RecordListIter RI = Features.begin(), E = Features.end(); RI != E;) {
Record *R = *RI++;
std::string Instance = R->getName();
std::string Name = R->getValueAsString("Name");
std::string Type = R->getValueAsString("Type");
std::string Attribute = R->getValueAsString("Attribute");
OS << " " << Attribute << " = (Bits & " << Instance << ") != 0;\n";
}
OS << "}\n";
}
//
// SubtargetEmitter::run - Main subtarget enumeration emitter.
//
void SubtargetEmitter::run(std::ostream &OS) {
Target = CodeGenTarget().getName();
EmitSourceFileHeader("Subtarget Enumeration Source Fragment", OS);
OS << "#include \"llvm/Target/SubtargetFeature.h\"\n\n";
Enumeration(OS, "FuncUnit", true);
OS<<"\n";
Enumeration(OS, "InstrItinClass", false);
OS<<"\n";
Enumeration(OS, "SubtargetFeature", true);
OS<<"\n";
FeatureKeyValues(OS);
OS<<"\n";
CPUKeyValues(OS);
OS<<"\n";
ParseFeaturesFunction(OS);
}
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