489 lines
15 KiB
C++
489 lines
15 KiB
C++
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//===- OptParserEmitter.cpp - Table Driven Command Line Parsing -----------===//
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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 "OptEmitter.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.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 <cctype>
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#include <cstring>
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#include <map>
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#include <memory>
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using namespace llvm;
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static std::string getOptionName(const Record &R) {
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// Use the record name unless EnumName is defined.
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if (isa<UnsetInit>(R.getValueInit("EnumName")))
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return std::string(R.getName());
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return std::string(R.getValueAsString("EnumName"));
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}
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static raw_ostream &write_cstring(raw_ostream &OS, llvm::StringRef Str) {
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OS << '"';
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OS.write_escaped(Str);
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OS << '"';
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return OS;
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}
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static std::string getOptionSpelling(const Record &R, size_t &PrefixLength) {
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std::vector<StringRef> Prefixes = R.getValueAsListOfStrings("Prefixes");
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StringRef Name = R.getValueAsString("Name");
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if (Prefixes.empty()) {
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PrefixLength = 0;
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return Name.str();
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}
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PrefixLength = Prefixes[0].size();
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return (Twine(Prefixes[0]) + Twine(Name)).str();
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}
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static std::string getOptionSpelling(const Record &R) {
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size_t PrefixLength;
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return getOptionSpelling(R, PrefixLength);
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}
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static void emitNameUsingSpelling(raw_ostream &OS, const Record &R) {
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size_t PrefixLength;
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OS << "&";
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write_cstring(OS, StringRef(getOptionSpelling(R, PrefixLength)));
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OS << "[" << PrefixLength << "]";
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}
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class MarshallingInfo {
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public:
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static constexpr const char *MacroName = "OPTION_WITH_MARSHALLING";
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const Record &R;
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bool ShouldAlwaysEmit;
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StringRef MacroPrefix;
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StringRef KeyPath;
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StringRef DefaultValue;
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StringRef NormalizedValuesScope;
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StringRef ImpliedCheck;
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StringRef ImpliedValue;
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StringRef ShouldParse;
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StringRef Normalizer;
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StringRef Denormalizer;
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StringRef ValueMerger;
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StringRef ValueExtractor;
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int TableIndex = -1;
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std::vector<StringRef> Values;
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std::vector<StringRef> NormalizedValues;
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std::string ValueTableName;
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static size_t NextTableIndex;
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static constexpr const char *ValueTablePreamble = R"(
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struct SimpleEnumValue {
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const char *Name;
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unsigned Value;
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};
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struct SimpleEnumValueTable {
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const SimpleEnumValue *Table;
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unsigned Size;
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};
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)";
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static constexpr const char *ValueTablesDecl =
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"static const SimpleEnumValueTable SimpleEnumValueTables[] = ";
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MarshallingInfo(const Record &R) : R(R) {}
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std::string getMacroName() const {
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return (MacroPrefix + MarshallingInfo::MacroName).str();
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}
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void emit(raw_ostream &OS) const {
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write_cstring(OS, StringRef(getOptionSpelling(R)));
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OS << ", ";
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OS << ShouldParse;
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OS << ", ";
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OS << ShouldAlwaysEmit;
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OS << ", ";
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OS << KeyPath;
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OS << ", ";
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emitScopedNormalizedValue(OS, DefaultValue);
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OS << ", ";
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OS << ImpliedCheck;
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OS << ", ";
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emitScopedNormalizedValue(OS, ImpliedValue);
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OS << ", ";
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OS << Normalizer;
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OS << ", ";
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OS << Denormalizer;
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OS << ", ";
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OS << ValueMerger;
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OS << ", ";
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OS << ValueExtractor;
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OS << ", ";
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OS << TableIndex;
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}
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Optional<StringRef> emitValueTable(raw_ostream &OS) const {
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if (TableIndex == -1)
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return {};
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OS << "static const SimpleEnumValue " << ValueTableName << "[] = {\n";
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for (unsigned I = 0, E = Values.size(); I != E; ++I) {
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OS << "{";
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write_cstring(OS, Values[I]);
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OS << ",";
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OS << "static_cast<unsigned>(";
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emitScopedNormalizedValue(OS, NormalizedValues[I]);
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OS << ")},";
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}
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OS << "};\n";
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return StringRef(ValueTableName);
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}
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private:
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void emitScopedNormalizedValue(raw_ostream &OS,
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StringRef NormalizedValue) const {
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if (!NormalizedValuesScope.empty())
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OS << NormalizedValuesScope << "::";
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OS << NormalizedValue;
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}
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};
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size_t MarshallingInfo::NextTableIndex = 0;
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static MarshallingInfo createMarshallingInfo(const Record &R) {
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assert(!isa<UnsetInit>(R.getValueInit("KeyPath")) &&
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!isa<UnsetInit>(R.getValueInit("DefaultValue")) &&
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!isa<UnsetInit>(R.getValueInit("ValueMerger")) &&
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"MarshallingInfo must have a provide a keypath, default value and a "
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"value merger");
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MarshallingInfo Ret(R);
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Ret.ShouldAlwaysEmit = R.getValueAsBit("ShouldAlwaysEmit");
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Ret.MacroPrefix = R.getValueAsString("MacroPrefix");
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Ret.KeyPath = R.getValueAsString("KeyPath");
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Ret.DefaultValue = R.getValueAsString("DefaultValue");
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Ret.NormalizedValuesScope = R.getValueAsString("NormalizedValuesScope");
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Ret.ImpliedCheck = R.getValueAsString("ImpliedCheck");
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Ret.ImpliedValue =
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R.getValueAsOptionalString("ImpliedValue").getValueOr(Ret.DefaultValue);
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Ret.ShouldParse = R.getValueAsString("ShouldParse");
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Ret.Normalizer = R.getValueAsString("Normalizer");
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Ret.Denormalizer = R.getValueAsString("Denormalizer");
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Ret.ValueMerger = R.getValueAsString("ValueMerger");
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Ret.ValueExtractor = R.getValueAsString("ValueExtractor");
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if (!isa<UnsetInit>(R.getValueInit("NormalizedValues"))) {
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assert(!isa<UnsetInit>(R.getValueInit("Values")) &&
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"Cannot provide normalized values for value-less options");
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Ret.TableIndex = MarshallingInfo::NextTableIndex++;
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Ret.NormalizedValues = R.getValueAsListOfStrings("NormalizedValues");
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Ret.Values.reserve(Ret.NormalizedValues.size());
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Ret.ValueTableName = getOptionName(R) + "ValueTable";
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StringRef ValuesStr = R.getValueAsString("Values");
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for (;;) {
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size_t Idx = ValuesStr.find(',');
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if (Idx == StringRef::npos)
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break;
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if (Idx > 0)
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Ret.Values.push_back(ValuesStr.slice(0, Idx));
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ValuesStr = ValuesStr.slice(Idx + 1, StringRef::npos);
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}
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if (!ValuesStr.empty())
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Ret.Values.push_back(ValuesStr);
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assert(Ret.Values.size() == Ret.NormalizedValues.size() &&
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"The number of normalized values doesn't match the number of "
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"values");
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}
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return Ret;
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}
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/// OptParserEmitter - This tablegen backend takes an input .td file
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/// describing a list of options and emits a data structure for parsing and
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/// working with those options when given an input command line.
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namespace llvm {
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void EmitOptParser(RecordKeeper &Records, raw_ostream &OS) {
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// Get the option groups and options.
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const std::vector<Record*> &Groups =
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Records.getAllDerivedDefinitions("OptionGroup");
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std::vector<Record*> Opts = Records.getAllDerivedDefinitions("Option");
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emitSourceFileHeader("Option Parsing Definitions", OS);
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array_pod_sort(Opts.begin(), Opts.end(), CompareOptionRecords);
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// Generate prefix groups.
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typedef SmallVector<SmallString<2>, 2> PrefixKeyT;
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typedef std::map<PrefixKeyT, std::string> PrefixesT;
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PrefixesT Prefixes;
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Prefixes.insert(std::make_pair(PrefixKeyT(), "prefix_0"));
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unsigned CurPrefix = 0;
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for (const Record &R : llvm::make_pointee_range(Opts)) {
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std::vector<StringRef> RPrefixes = R.getValueAsListOfStrings("Prefixes");
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PrefixKeyT PrefixKey(RPrefixes.begin(), RPrefixes.end());
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unsigned NewPrefix = CurPrefix + 1;
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std::string Prefix = (Twine("prefix_") + Twine(NewPrefix)).str();
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if (Prefixes.insert(std::make_pair(PrefixKey, Prefix)).second)
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CurPrefix = NewPrefix;
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}
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// Dump prefixes.
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OS << "/////////\n";
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OS << "// Prefixes\n\n";
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OS << "#ifdef PREFIX\n";
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OS << "#define COMMA ,\n";
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for (const auto &Prefix : Prefixes) {
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OS << "PREFIX(";
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// Prefix name.
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OS << Prefix.second;
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// Prefix values.
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OS << ", {";
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for (StringRef PrefixKey : Prefix.first)
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OS << "\"" << PrefixKey << "\" COMMA ";
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OS << "nullptr})\n";
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}
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OS << "#undef COMMA\n";
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OS << "#endif // PREFIX\n\n";
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OS << "/////////\n";
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OS << "// Groups\n\n";
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OS << "#ifdef OPTION\n";
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for (const Record &R : llvm::make_pointee_range(Groups)) {
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// Start a single option entry.
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OS << "OPTION(";
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// The option prefix;
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OS << "nullptr";
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// The option string.
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OS << ", \"" << R.getValueAsString("Name") << '"';
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// The option identifier name.
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OS << ", " << getOptionName(R);
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// The option kind.
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OS << ", Group";
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// The containing option group (if any).
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OS << ", ";
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if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
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OS << getOptionName(*DI->getDef());
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else
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OS << "INVALID";
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// The other option arguments (unused for groups).
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OS << ", INVALID, nullptr, 0, 0";
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// The option help text.
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if (!isa<UnsetInit>(R.getValueInit("HelpText"))) {
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OS << ",\n";
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OS << " ";
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write_cstring(OS, R.getValueAsString("HelpText"));
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} else
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OS << ", nullptr";
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// The option meta-variable name (unused).
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OS << ", nullptr";
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// The option Values (unused for groups).
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OS << ", nullptr)\n";
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}
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OS << "\n";
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OS << "//////////\n";
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OS << "// Options\n\n";
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auto WriteOptRecordFields = [&](raw_ostream &OS, const Record &R) {
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// The option prefix;
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std::vector<StringRef> RPrefixes = R.getValueAsListOfStrings("Prefixes");
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OS << Prefixes[PrefixKeyT(RPrefixes.begin(), RPrefixes.end())] << ", ";
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// The option string.
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emitNameUsingSpelling(OS, R);
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// The option identifier name.
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OS << ", " << getOptionName(R);
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// The option kind.
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OS << ", " << R.getValueAsDef("Kind")->getValueAsString("Name");
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// The containing option group (if any).
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OS << ", ";
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const ListInit *GroupFlags = nullptr;
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if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group"))) {
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GroupFlags = DI->getDef()->getValueAsListInit("Flags");
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OS << getOptionName(*DI->getDef());
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} else
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OS << "INVALID";
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// The option alias (if any).
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OS << ", ";
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if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Alias")))
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OS << getOptionName(*DI->getDef());
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else
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OS << "INVALID";
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// The option alias arguments (if any).
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// Emitted as a \0 separated list in a string, e.g. ["foo", "bar"]
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// would become "foo\0bar\0". Note that the compiler adds an implicit
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// terminating \0 at the end.
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OS << ", ";
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std::vector<StringRef> AliasArgs = R.getValueAsListOfStrings("AliasArgs");
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if (AliasArgs.size() == 0) {
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OS << "nullptr";
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} else {
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OS << "\"";
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for (StringRef AliasArg : AliasArgs)
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OS << AliasArg << "\\0";
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OS << "\"";
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}
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// The option flags.
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OS << ", ";
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int NumFlags = 0;
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const ListInit *LI = R.getValueAsListInit("Flags");
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for (Init *I : *LI)
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OS << (NumFlags++ ? " | " : "") << cast<DefInit>(I)->getDef()->getName();
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if (GroupFlags) {
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for (Init *I : *GroupFlags)
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OS << (NumFlags++ ? " | " : "")
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<< cast<DefInit>(I)->getDef()->getName();
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}
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if (NumFlags == 0)
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OS << '0';
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// The option parameter field.
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OS << ", " << R.getValueAsInt("NumArgs");
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// The option help text.
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if (!isa<UnsetInit>(R.getValueInit("HelpText"))) {
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OS << ",\n";
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OS << " ";
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write_cstring(OS, R.getValueAsString("HelpText"));
|
||
|
|
} else
|
||
|
|
OS << ", nullptr";
|
||
|
|
|
||
|
|
// The option meta-variable name.
|
||
|
|
OS << ", ";
|
||
|
|
if (!isa<UnsetInit>(R.getValueInit("MetaVarName")))
|
||
|
|
write_cstring(OS, R.getValueAsString("MetaVarName"));
|
||
|
|
else
|
||
|
|
OS << "nullptr";
|
||
|
|
|
||
|
|
// The option Values. Used for shell autocompletion.
|
||
|
|
OS << ", ";
|
||
|
|
if (!isa<UnsetInit>(R.getValueInit("Values")))
|
||
|
|
write_cstring(OS, R.getValueAsString("Values"));
|
||
|
|
else
|
||
|
|
OS << "nullptr";
|
||
|
|
};
|
||
|
|
|
||
|
|
auto IsMarshallingOption = [](const Record &R) {
|
||
|
|
return !isa<UnsetInit>(R.getValueInit("KeyPath")) &&
|
||
|
|
!R.getValueAsString("KeyPath").empty();
|
||
|
|
};
|
||
|
|
|
||
|
|
std::vector<const Record *> OptsWithMarshalling;
|
||
|
|
for (const Record &R : llvm::make_pointee_range(Opts)) {
|
||
|
|
// Start a single option entry.
|
||
|
|
OS << "OPTION(";
|
||
|
|
WriteOptRecordFields(OS, R);
|
||
|
|
OS << ")\n";
|
||
|
|
if (IsMarshallingOption(R))
|
||
|
|
OptsWithMarshalling.push_back(&R);
|
||
|
|
}
|
||
|
|
OS << "#endif // OPTION\n";
|
||
|
|
|
||
|
|
auto CmpMarshallingOpts = [](const Record *const *A, const Record *const *B) {
|
||
|
|
unsigned AID = (*A)->getID();
|
||
|
|
unsigned BID = (*B)->getID();
|
||
|
|
|
||
|
|
if (AID < BID)
|
||
|
|
return -1;
|
||
|
|
if (AID > BID)
|
||
|
|
return 1;
|
||
|
|
return 0;
|
||
|
|
};
|
||
|
|
// The RecordKeeper stores records (options) in lexicographical order, and we
|
||
|
|
// have reordered the options again when generating prefix groups. We need to
|
||
|
|
// restore the original definition order of options with marshalling to honor
|
||
|
|
// the topology of the dependency graph implied by `DefaultAnyOf`.
|
||
|
|
array_pod_sort(OptsWithMarshalling.begin(), OptsWithMarshalling.end(),
|
||
|
|
CmpMarshallingOpts);
|
||
|
|
|
||
|
|
std::vector<MarshallingInfo> MarshallingInfos;
|
||
|
|
for (const auto *R : OptsWithMarshalling)
|
||
|
|
MarshallingInfos.push_back(createMarshallingInfo(*R));
|
||
|
|
|
||
|
|
for (const auto &MI : MarshallingInfos) {
|
||
|
|
OS << "#ifdef " << MI.getMacroName() << "\n";
|
||
|
|
OS << MI.getMacroName() << "(";
|
||
|
|
WriteOptRecordFields(OS, MI.R);
|
||
|
|
OS << ", ";
|
||
|
|
MI.emit(OS);
|
||
|
|
OS << ")\n";
|
||
|
|
OS << "#endif // " << MI.getMacroName() << "\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
OS << "\n";
|
||
|
|
OS << "#ifdef SIMPLE_ENUM_VALUE_TABLE";
|
||
|
|
OS << "\n";
|
||
|
|
OS << MarshallingInfo::ValueTablePreamble;
|
||
|
|
std::vector<StringRef> ValueTableNames;
|
||
|
|
for (const auto &MI : MarshallingInfos)
|
||
|
|
if (auto MaybeValueTableName = MI.emitValueTable(OS))
|
||
|
|
ValueTableNames.push_back(*MaybeValueTableName);
|
||
|
|
|
||
|
|
OS << MarshallingInfo::ValueTablesDecl << "{";
|
||
|
|
for (auto ValueTableName : ValueTableNames)
|
||
|
|
OS << "{" << ValueTableName << ", sizeof(" << ValueTableName
|
||
|
|
<< ") / sizeof(SimpleEnumValue)"
|
||
|
|
<< "},\n";
|
||
|
|
OS << "};\n";
|
||
|
|
OS << "static const unsigned SimpleEnumValueTablesSize = "
|
||
|
|
"sizeof(SimpleEnumValueTables) / sizeof(SimpleEnumValueTable);\n";
|
||
|
|
|
||
|
|
OS << "#endif // SIMPLE_ENUM_VALUE_TABLE\n";
|
||
|
|
OS << "\n";
|
||
|
|
|
||
|
|
OS << "\n";
|
||
|
|
OS << "#ifdef OPTTABLE_ARG_INIT\n";
|
||
|
|
OS << "//////////\n";
|
||
|
|
OS << "// Option Values\n\n";
|
||
|
|
for (const Record &R : llvm::make_pointee_range(Opts)) {
|
||
|
|
if (isa<UnsetInit>(R.getValueInit("ValuesCode")))
|
||
|
|
continue;
|
||
|
|
OS << "{\n";
|
||
|
|
OS << "bool ValuesWereAdded;\n";
|
||
|
|
OS << R.getValueAsString("ValuesCode");
|
||
|
|
OS << "\n";
|
||
|
|
for (StringRef Prefix : R.getValueAsListOfStrings("Prefixes")) {
|
||
|
|
OS << "ValuesWereAdded = Opt.addValues(";
|
||
|
|
std::string S(Prefix);
|
||
|
|
S += R.getValueAsString("Name");
|
||
|
|
write_cstring(OS, S);
|
||
|
|
OS << ", Values);\n";
|
||
|
|
OS << "(void)ValuesWereAdded;\n";
|
||
|
|
OS << "assert(ValuesWereAdded && \"Couldn't add values to "
|
||
|
|
"OptTable!\");\n";
|
||
|
|
}
|
||
|
|
OS << "}\n";
|
||
|
|
}
|
||
|
|
OS << "\n";
|
||
|
|
OS << "#endif // OPTTABLE_ARG_INIT\n";
|
||
|
|
}
|
||
|
|
} // end namespace llvm
|