forked from OSchip/llvm-project
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
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//===- SubtargetEmitter.cpp - Generate subtarget enumerations -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by James M. Laskey and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tablegen backend emits subtarget enumerations.
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//
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//===----------------------------------------------------------------------===//
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#include "SubtargetEmitter.h"
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#include "CodeGenTarget.h"
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#include "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/Debug.h"
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#include <algorithm>
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#include <set>
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using namespace llvm;
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// Convenience types
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typedef std::vector<Record*> RecordList;
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typedef std::vector<Record*>::iterator RecordListIter;
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// SubtargetEmitter::run - Main subtarget enumeration emitter.
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//
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void SubtargetEmitter::run(std::ostream &OS) {
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EmitSourceFileHeader("Subtarget Enumeration Source Fragment", OS);
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RecordList Features = Records.getAllDerivedDefinitions("SubtargetFeature");
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RecordList Processors = Records.getAllDerivedDefinitions("Processor");
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OS << "namespace llvm {\n\n";
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{ // Feature enumeration
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int i = 0;
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OS << "enum {\n";
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for (RecordListIter RI = Features.begin(), E = Features.end(); RI != E;){
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Record *R = *RI++;
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std::string Instance = R->getName();
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OS << " "
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<< Instance
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<< " = "
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<< " 1 << " << i++
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<< ((RI != E) ? ",\n" : "\n");
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}
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OS << "};\n";
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}
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{ // Feature key values
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OS << "\n\n"
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<< "/// Sorted (by key) array of values for CPU features.\n"
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<< "static SubtargetFeatureKV FeatureKV[] = {\n";
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for (RecordListIter RI = Features.begin(), E = Features.end(); RI != E;) {
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Record *R = *RI++;
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std::string Instance = R->getName();
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std::string Name = R->getValueAsString("Name");
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std::string Desc = R->getValueAsString("Desc");
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OS << " { "
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<< "\"" << Name << "\", "
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<< "\"" << Desc << "\", "
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<< Instance
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<< ((RI != E) ? " },\n" : " }\n");
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}
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OS << "};\n";
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}
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{ // Feature key values
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OS << "\n\n"
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<< "/// Sorted (by key) array of values for CPU subtype.\n"
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<< "static const SubtargetFeatureKV SubTypeKV[] = {\n";
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for (RecordListIter RI = Processors.begin(), E = Processors.end();
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RI != E;) {
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Record *R = *RI++;
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std::string Name = R->getValueAsString("Name");
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Record *ProcItin = R->getValueAsDef("ProcItin");
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ListInit *Features = R->getValueAsListInit("Features");
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unsigned N = Features->getSize();
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OS << " { "
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<< "\"" << Name << "\", "
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<< "\"Select the " << Name << " processor\", ";
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if (N == 0) {
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OS << "0";
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} else {
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for (unsigned i = 0; i < N; ) {
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if (DefInit *DI = dynamic_cast<DefInit*>(Features->getElement(i++))) {
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Record *Feature = DI->getDef();
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std::string Name = Feature->getName();
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OS << Name;
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if (i != N) OS << " | ";
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} else {
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throw "Feature: " + Name +
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" expected feature in processor feature list!";
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}
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}
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}
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OS << ((RI != E) ? " },\n" : " }\n");
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}
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OS << "};\n";
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}
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OS << "\n} // End llvm namespace \n";
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}
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