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100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
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//===- VTEmitter.cpp - Generate properties from ValueTypes.td -------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/TableGen/Record.h"
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#include "llvm/TableGen/TableGenBackend.h"
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#include <array>
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#include <cassert>
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#include <map>
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using namespace llvm;
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namespace {
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class VTEmitter {
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private:
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RecordKeeper &Records;
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public:
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VTEmitter(RecordKeeper &R) : Records(R) {}
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void run(raw_ostream &OS);
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};
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} // End anonymous namespace.
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void VTEmitter::run(raw_ostream &OS) {
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emitSourceFileHeader("ValueTypes Source Fragment", OS);
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std::array<const Record *, 256> VTsByNumber = {};
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auto ValueTypes = Records.getAllDerivedDefinitions("ValueType");
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for (auto *VT : ValueTypes) {
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auto Number = VT->getValueAsInt("Value");
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assert(0 <= Number && Number < (int)VTsByNumber.size() &&
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"ValueType should be uint8_t");
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assert(!VTsByNumber[Number] && "Duplicate ValueType");
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VTsByNumber[Number] = VT;
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}
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struct VTRange {
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StringRef First;
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StringRef Last;
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bool Closed;
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};
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std::map<StringRef, VTRange> VTRanges;
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auto UpdateVTRange = [&VTRanges](const char *Key, StringRef Name,
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bool Valid) {
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if (Valid) {
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if (!VTRanges.count(Key))
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VTRanges[Key].First = Name;
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assert(!VTRanges[Key].Closed && "Gap detected!");
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VTRanges[Key].Last = Name;
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} else if (VTRanges.count(Key)) {
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VTRanges[Key].Closed = true;
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}
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};
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OS << "#ifdef GET_VT_ATTR // (Ty, n, sz)\n";
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for (const auto *VT : VTsByNumber) {
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if (!VT)
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continue;
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auto Name = VT->getName();
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Name = StringSwitch<StringRef>(Name)
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.Case("OtherVT", "Other")
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.Case("FlagVT", "Glue")
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.Case("untyped", "Untyped")
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.Case("MetadataVT", "Metadata")
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.Default(Name);
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auto Value = VT->getValueAsInt("Value");
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UpdateVTRange("VALUETYPE", Name, Value < 224);
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// clang-format off
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OS << " GET_VT_ATTR("
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<< Name << ", "
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<< Value << ", "
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<< VT->getValueAsInt("Size") << ")\n";
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// clang-format on
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}
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OS << "#endif\n\n";
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OS << "#ifdef GET_VT_RANGES\n";
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for (const auto &KV : VTRanges) {
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assert(KV.second.Closed);
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OS << " FIRST_" << KV.first << " = " << KV.second.First << ",\n"
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<< " LAST_" << KV.first << " = " << KV.second.Last << ",\n";
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}
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OS << "#endif\n\n";
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}
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static TableGen::Emitter::OptClass<VTEmitter> X("gen-vt", "Generate ValueType");
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