e8d4038efb
Add wrapper classes to to access record's fields. This makes it easier to pass record information to the diverse functions for code generation. Reviewed By: jdenny Differential Revision: https://reviews.llvm.org/D84612
582 lines
20 KiB
C++
582 lines
20 KiB
C++
//===- DirectiveEmitter.cpp - Directive Language Emitter ------------------===//
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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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//
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// DirectiveEmitter uses the descriptions of directives and clauses to construct
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// common code declarations to be used in Frontends.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.h"
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#include "llvm/TableGen/TableGenBackend.h"
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using namespace llvm;
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namespace {
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// Simple RAII helper for defining ifdef-undef-endif scopes.
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class IfDefScope {
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public:
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IfDefScope(StringRef Name, raw_ostream &OS) : Name(Name), OS(OS) {
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OS << "#ifdef " << Name << "\n"
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<< "#undef " << Name << "\n";
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}
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~IfDefScope() { OS << "\n#endif // " << Name << "\n\n"; }
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private:
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StringRef Name;
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raw_ostream &OS;
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};
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} // end anonymous namespace
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namespace llvm {
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// Wrapper class that contains DirectiveLanguage's information defined in
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// DirectiveBase.td and provides helper methods for accessing it.
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class DirectiveLanguage {
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public:
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explicit DirectiveLanguage(const llvm::Record *Def) : Def(Def) {}
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StringRef getName() const { return Def->getValueAsString("name"); }
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StringRef getCppNamespace() const {
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return Def->getValueAsString("cppNamespace");
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}
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StringRef getDirectivePrefix() const {
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return Def->getValueAsString("directivePrefix");
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}
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StringRef getClausePrefix() const {
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return Def->getValueAsString("clausePrefix");
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}
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StringRef getIncludeHeader() const {
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return Def->getValueAsString("includeHeader");
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}
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StringRef getClauseEnumSetClass() const {
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return Def->getValueAsString("clauseEnumSetClass");
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}
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bool hasMakeEnumAvailableInNamespace() const {
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return Def->getValueAsBit("makeEnumAvailableInNamespace");
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}
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bool hasEnableBitmaskEnumInNamespace() const {
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return Def->getValueAsBit("enableBitmaskEnumInNamespace");
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}
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private:
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const llvm::Record *Def;
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};
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// Base record class used for Directive and Clause class defined in
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// DirectiveBase.td.
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class BaseRecord {
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public:
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explicit BaseRecord(const llvm::Record *Def) : Def(Def) {}
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StringRef getName() const { return Def->getValueAsString("name"); }
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StringRef getAlternativeName() const {
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return Def->getValueAsString("alternativeName");
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}
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// Returns the name of the directive formatted for output. Whitespace are
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// replaced with underscores.
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std::string getFormattedName() {
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StringRef Name = Def->getValueAsString("name");
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std::string N = Name.str();
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std::replace(N.begin(), N.end(), ' ', '_');
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return N;
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}
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bool isDefault() const { return Def->getValueAsBit("isDefault"); }
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protected:
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const llvm::Record *Def;
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};
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// Wrapper class that contains a Directive's information defined in
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// DirectiveBase.td and provides helper methods for accessing it.
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class Directive : public BaseRecord {
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public:
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explicit Directive(const llvm::Record *Def) : BaseRecord(Def) {}
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std::vector<Record *> getAllowedClauses() const {
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return Def->getValueAsListOfDefs("allowedClauses");
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}
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std::vector<Record *> getAllowedOnceClauses() const {
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return Def->getValueAsListOfDefs("allowedOnceClauses");
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}
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std::vector<Record *> getAllowedExclusiveClauses() const {
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return Def->getValueAsListOfDefs("allowedExclusiveClauses");
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}
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std::vector<Record *> getRequiredClauses() const {
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return Def->getValueAsListOfDefs("requiredClauses");
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}
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};
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// Wrapper class that contains Clause's information defined in DirectiveBase.td
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// and provides helper methods for accessing it.
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class Clause : public BaseRecord {
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public:
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explicit Clause(const llvm::Record *Def) : BaseRecord(Def) {}
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// Optional field.
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StringRef getClangClass() const {
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return Def->getValueAsString("clangClass");
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}
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// Optional field.
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StringRef getFlangClass() const {
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return Def->getValueAsString("flangClass");
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}
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bool isImplict() const { return Def->getValueAsBit("isImplicit"); }
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};
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// Wrapper class that contains VersionedClause's information defined in
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// DirectiveBase.td and provides helper methods for accessing it.
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class VersionedClause {
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public:
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explicit VersionedClause(const llvm::Record *Def) : Def(Def) {}
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// Return the specific clause record wrapped in the Clause class.
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Clause getClause() const { return Clause{Def->getValueAsDef("clause")}; }
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int64_t getMinVersion() const { return Def->getValueAsInt("minVersion"); }
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int64_t getMaxVersion() const { return Def->getValueAsInt("maxVersion"); }
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private:
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const llvm::Record *Def;
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};
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// Generate enum class
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void GenerateEnumClass(const std::vector<Record *> &Records, raw_ostream &OS,
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StringRef Enum, StringRef Prefix,
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DirectiveLanguage &DirLang) {
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OS << "\n";
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OS << "enum class " << Enum << " {\n";
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for (const auto &R : Records) {
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BaseRecord Rec{R};
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OS << " " << Prefix << Rec.getFormattedName() << ",\n";
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}
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OS << "};\n";
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OS << "\n";
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OS << "static constexpr std::size_t " << Enum
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<< "_enumSize = " << Records.size() << ";\n";
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// Make the enum values available in the defined namespace. This allows us to
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// write something like Enum_X if we have a `using namespace <CppNamespace>`.
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// At the same time we do not loose the strong type guarantees of the enum
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// class, that is we cannot pass an unsigned as Directive without an explicit
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// cast.
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if (DirLang.hasMakeEnumAvailableInNamespace()) {
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OS << "\n";
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for (const auto &R : Records) {
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BaseRecord Rec{R};
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OS << "constexpr auto " << Prefix << Rec.getFormattedName() << " = "
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<< "llvm::" << DirLang.getCppNamespace() << "::" << Enum
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<< "::" << Prefix << Rec.getFormattedName() << ";\n";
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}
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}
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}
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// Generate the declaration section for the enumeration in the directive
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// language
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void EmitDirectivesDecl(RecordKeeper &Records, raw_ostream &OS) {
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const auto &DirectiveLanguages =
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Records.getAllDerivedDefinitions("DirectiveLanguage");
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if (DirectiveLanguages.size() != 1) {
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PrintError("A single definition of DirectiveLanguage is needed.");
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return;
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}
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DirectiveLanguage DirLang{DirectiveLanguages[0]};
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OS << "#ifndef LLVM_" << DirLang.getName() << "_INC\n";
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OS << "#define LLVM_" << DirLang.getName() << "_INC\n";
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if (DirLang.hasEnableBitmaskEnumInNamespace())
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OS << "\n#include \"llvm/ADT/BitmaskEnum.h\"\n";
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OS << "\n";
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OS << "namespace llvm {\n";
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OS << "class StringRef;\n";
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// Open namespaces defined in the directive language
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llvm::SmallVector<StringRef, 2> Namespaces;
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llvm::SplitString(DirLang.getCppNamespace(), Namespaces, "::");
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for (auto Ns : Namespaces)
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OS << "namespace " << Ns << " {\n";
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if (DirLang.hasEnableBitmaskEnumInNamespace())
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OS << "\nLLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE();\n";
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// Emit Directive enumeration
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const auto &Directives = Records.getAllDerivedDefinitions("Directive");
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GenerateEnumClass(Directives, OS, "Directive", DirLang.getDirectivePrefix(),
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DirLang);
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// Emit Clause enumeration
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const auto &Clauses = Records.getAllDerivedDefinitions("Clause");
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GenerateEnumClass(Clauses, OS, "Clause", DirLang.getClausePrefix(), DirLang);
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// Generic function signatures
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OS << "\n";
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OS << "// Enumeration helper functions\n";
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OS << "Directive get" << DirLang.getName()
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<< "DirectiveKind(llvm::StringRef Str);\n";
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OS << "\n";
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OS << "llvm::StringRef get" << DirLang.getName()
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<< "DirectiveName(Directive D);\n";
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OS << "\n";
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OS << "Clause get" << DirLang.getName()
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<< "ClauseKind(llvm::StringRef Str);\n";
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OS << "\n";
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OS << "llvm::StringRef get" << DirLang.getName() << "ClauseName(Clause C);\n";
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OS << "\n";
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OS << "/// Return true if \\p C is a valid clause for \\p D in version \\p "
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<< "Version.\n";
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OS << "bool isAllowedClauseForDirective(Directive D, "
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<< "Clause C, unsigned Version);\n";
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OS << "\n";
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// Closing namespaces
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for (auto Ns : llvm::reverse(Namespaces))
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OS << "} // namespace " << Ns << "\n";
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OS << "} // namespace llvm\n";
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OS << "#endif // LLVM_" << DirLang.getName() << "_INC\n";
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}
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// Generate function implementation for get<Enum>Name(StringRef Str)
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void GenerateGetName(const std::vector<Record *> &Records, raw_ostream &OS,
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StringRef Enum, DirectiveLanguage &DirLang,
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StringRef Prefix) {
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OS << "\n";
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OS << "llvm::StringRef llvm::" << DirLang.getCppNamespace() << "::get"
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<< DirLang.getName() << Enum << "Name(" << Enum << " Kind) {\n";
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OS << " switch (Kind) {\n";
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for (const auto &R : Records) {
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BaseRecord Rec{R};
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OS << " case " << Prefix << Rec.getFormattedName() << ":\n";
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OS << " return \"";
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if (Rec.getAlternativeName().empty())
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OS << Rec.getName();
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else
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OS << Rec.getAlternativeName();
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OS << "\";\n";
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}
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OS << " }\n"; // switch
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OS << " llvm_unreachable(\"Invalid " << DirLang.getName() << " " << Enum
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<< " kind\");\n";
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OS << "}\n";
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}
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// Generate function implementation for get<Enum>Kind(StringRef Str)
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void GenerateGetKind(const std::vector<Record *> &Records, raw_ostream &OS,
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StringRef Enum, DirectiveLanguage &DirLang,
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StringRef Prefix, bool ImplicitAsUnknown) {
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auto DefaultIt = std::find_if(Records.begin(), Records.end(), [](Record *R) {
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return R->getValueAsBit("isDefault") == true;
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});
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if (DefaultIt == Records.end()) {
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PrintError("A least one " + Enum + " must be defined as default.");
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return;
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}
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BaseRecord DefaultRec{(*DefaultIt)};
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OS << "\n";
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OS << Enum << " llvm::" << DirLang.getCppNamespace() << "::get"
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<< DirLang.getName() << Enum << "Kind(llvm::StringRef Str) {\n";
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OS << " return llvm::StringSwitch<" << Enum << ">(Str)\n";
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for (const auto &R : Records) {
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BaseRecord Rec{R};
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if (ImplicitAsUnknown && R->getValueAsBit("isImplicit")) {
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OS << " .Case(\"" << Rec.getName() << "\"," << Prefix
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<< DefaultRec.getFormattedName() << ")\n";
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} else {
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OS << " .Case(\"" << Rec.getName() << "\"," << Prefix
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<< Rec.getFormattedName() << ")\n";
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}
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}
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OS << " .Default(" << Prefix << DefaultRec.getFormattedName() << ");\n";
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OS << "}\n";
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}
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void GenerateCaseForVersionedClauses(const std::vector<Record *> &Clauses,
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raw_ostream &OS, StringRef DirectiveName,
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DirectiveLanguage &DirLang,
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llvm::StringSet<> &Cases) {
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for (const auto &C : Clauses) {
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VersionedClause VerClause{C};
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const auto ClauseFormattedName = VerClause.getClause().getFormattedName();
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if (Cases.find(ClauseFormattedName) == Cases.end()) {
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Cases.insert(ClauseFormattedName);
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OS << " case " << DirLang.getClausePrefix() << ClauseFormattedName
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<< ":\n";
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OS << " return " << VerClause.getMinVersion()
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<< " <= Version && " << VerClause.getMaxVersion() << " >= Version;\n";
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}
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}
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}
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// Generate the isAllowedClauseForDirective function implementation.
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void GenerateIsAllowedClause(const std::vector<Record *> &Directives,
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raw_ostream &OS, DirectiveLanguage &DirLang) {
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OS << "\n";
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OS << "bool llvm::" << DirLang.getCppNamespace()
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<< "::isAllowedClauseForDirective("
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<< "Directive D, Clause C, unsigned Version) {\n";
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OS << " assert(unsigned(D) <= llvm::" << DirLang.getCppNamespace()
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<< "::Directive_enumSize);\n";
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OS << " assert(unsigned(C) <= llvm::" << DirLang.getCppNamespace()
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<< "::Clause_enumSize);\n";
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OS << " switch (D) {\n";
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for (const auto &D : Directives) {
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Directive Dir{D};
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OS << " case " << DirLang.getDirectivePrefix() << Dir.getFormattedName()
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<< ":\n";
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if (Dir.getAllowedClauses().size() == 0 &&
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Dir.getAllowedOnceClauses().size() == 0 &&
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Dir.getAllowedExclusiveClauses().size() == 0 &&
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Dir.getRequiredClauses().size() == 0) {
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OS << " return false;\n";
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} else {
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OS << " switch (C) {\n";
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llvm::StringSet<> Cases;
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GenerateCaseForVersionedClauses(Dir.getAllowedClauses(), OS,
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Dir.getName(), DirLang, Cases);
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GenerateCaseForVersionedClauses(Dir.getAllowedOnceClauses(), OS,
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Dir.getName(), DirLang, Cases);
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GenerateCaseForVersionedClauses(Dir.getAllowedExclusiveClauses(), OS,
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Dir.getName(), DirLang, Cases);
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GenerateCaseForVersionedClauses(Dir.getRequiredClauses(), OS,
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Dir.getName(), DirLang, Cases);
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OS << " default:\n";
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OS << " return false;\n";
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OS << " }\n"; // End of clauses switch
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}
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OS << " break;\n";
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}
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OS << " }\n"; // End of directives switch
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OS << " llvm_unreachable(\"Invalid " << DirLang.getName()
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<< " Directive kind\");\n";
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OS << "}\n"; // End of function isAllowedClauseForDirective
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}
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// Generate a simple enum set with the give clauses.
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void GenerateClauseSet(const std::vector<Record *> &Clauses, raw_ostream &OS,
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StringRef ClauseSetPrefix, Directive &Dir,
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DirectiveLanguage &DirLang) {
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OS << "\n";
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OS << " static " << DirLang.getClauseEnumSetClass() << " " << ClauseSetPrefix
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<< DirLang.getDirectivePrefix() << Dir.getFormattedName() << " {\n";
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for (const auto &C : Clauses) {
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VersionedClause VerClause{C};
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OS << " llvm::" << DirLang.getCppNamespace()
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<< "::Clause::" << DirLang.getClausePrefix()
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<< VerClause.getClause().getFormattedName() << ",\n";
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}
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OS << " };\n";
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}
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// Generate an enum set for the 4 kinds of clauses linked to a directive.
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void GenerateDirectiveClauseSets(const std::vector<Record *> &Directives,
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raw_ostream &OS, DirectiveLanguage &DirLang) {
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IfDefScope Scope("GEN_FLANG_DIRECTIVE_CLAUSE_SETS", OS);
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OS << "\n";
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OS << "namespace llvm {\n";
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// Open namespaces defined in the directive language.
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llvm::SmallVector<StringRef, 2> Namespaces;
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llvm::SplitString(DirLang.getCppNamespace(), Namespaces, "::");
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for (auto Ns : Namespaces)
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OS << "namespace " << Ns << " {\n";
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for (const auto &D : Directives) {
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Directive Dir{D};
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OS << "\n";
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OS << " // Sets for " << Dir.getName() << "\n";
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GenerateClauseSet(Dir.getAllowedClauses(), OS, "allowedClauses_", Dir,
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DirLang);
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GenerateClauseSet(Dir.getAllowedOnceClauses(), OS, "allowedOnceClauses_",
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Dir, DirLang);
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GenerateClauseSet(Dir.getAllowedExclusiveClauses(), OS,
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"allowedExclusiveClauses_", Dir, DirLang);
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GenerateClauseSet(Dir.getRequiredClauses(), OS, "requiredClauses_", Dir,
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DirLang);
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}
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// Closing namespaces
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for (auto Ns : llvm::reverse(Namespaces))
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OS << "} // namespace " << Ns << "\n";
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OS << "} // namespace llvm\n";
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}
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// Generate a map of directive (key) with DirectiveClauses struct as values.
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// The struct holds the 4 sets of enumeration for the 4 kinds of clauses
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// allowances (allowed, allowed once, allowed exclusive and required).
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void GenerateDirectiveClauseMap(const std::vector<Record *> &Directives,
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raw_ostream &OS, DirectiveLanguage &DirLang) {
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IfDefScope Scope("GEN_FLANG_DIRECTIVE_CLAUSE_MAP", OS);
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OS << "\n";
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OS << "struct " << DirLang.getName() << "DirectiveClauses {\n";
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OS << " const " << DirLang.getClauseEnumSetClass() << " allowed;\n";
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OS << " const " << DirLang.getClauseEnumSetClass() << " allowedOnce;\n";
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OS << " const " << DirLang.getClauseEnumSetClass() << " allowedExclusive;\n";
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OS << " const " << DirLang.getClauseEnumSetClass() << " requiredOneOf;\n";
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OS << "};\n";
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OS << "\n";
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OS << "std::unordered_map<llvm::" << DirLang.getCppNamespace()
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<< "::Directive, " << DirLang.getName() << "DirectiveClauses>\n";
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OS << " directiveClausesTable = {\n";
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for (const auto &D : Directives) {
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Directive Dir{D};
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OS << " {llvm::" << DirLang.getCppNamespace()
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<< "::Directive::" << DirLang.getDirectivePrefix()
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<< Dir.getFormattedName() << ",\n";
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OS << " {\n";
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OS << " llvm::" << DirLang.getCppNamespace() << "::allowedClauses_"
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<< DirLang.getDirectivePrefix() << Dir.getFormattedName() << ",\n";
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OS << " llvm::" << DirLang.getCppNamespace() << "::allowedOnceClauses_"
|
|
<< DirLang.getDirectivePrefix() << Dir.getFormattedName() << ",\n";
|
|
OS << " llvm::" << DirLang.getCppNamespace()
|
|
<< "::allowedExclusiveClauses_" << DirLang.getDirectivePrefix()
|
|
<< Dir.getFormattedName() << ",\n";
|
|
OS << " llvm::" << DirLang.getCppNamespace() << "::requiredClauses_"
|
|
<< DirLang.getDirectivePrefix() << Dir.getFormattedName() << ",\n";
|
|
OS << " }\n";
|
|
OS << " },\n";
|
|
}
|
|
|
|
OS << "};\n";
|
|
}
|
|
|
|
// Generate the implemenation section for the enumeration in the directive
|
|
// language
|
|
void EmitDirectivesFlangImpl(const std::vector<Record *> &Directives,
|
|
raw_ostream &OS,
|
|
DirectiveLanguage &DirectiveLanguage) {
|
|
|
|
GenerateDirectiveClauseSets(Directives, OS, DirectiveLanguage);
|
|
|
|
GenerateDirectiveClauseMap(Directives, OS, DirectiveLanguage);
|
|
}
|
|
|
|
// Generate the implemenation section for the enumeration in the directive
|
|
// language.
|
|
void EmitDirectivesGen(RecordKeeper &Records, raw_ostream &OS) {
|
|
|
|
const auto &DirectiveLanguages =
|
|
Records.getAllDerivedDefinitions("DirectiveLanguage");
|
|
|
|
if (DirectiveLanguages.size() != 1) {
|
|
PrintError("A single definition of DirectiveLanguage is needed.");
|
|
return;
|
|
}
|
|
|
|
const auto &Directives = Records.getAllDerivedDefinitions("Directive");
|
|
DirectiveLanguage DirectiveLanguage{DirectiveLanguages[0]};
|
|
EmitDirectivesFlangImpl(Directives, OS, DirectiveLanguage);
|
|
}
|
|
|
|
// Generate the implemenation for the enumeration in the directive
|
|
// language. This code can be included in library.
|
|
void EmitDirectivesImpl(RecordKeeper &Records, raw_ostream &OS) {
|
|
|
|
const auto &DirectiveLanguages =
|
|
Records.getAllDerivedDefinitions("DirectiveLanguage");
|
|
|
|
if (DirectiveLanguages.size() != 1) {
|
|
PrintError("A single definition of DirectiveLanguage is needed.");
|
|
return;
|
|
}
|
|
|
|
const auto &Directives = Records.getAllDerivedDefinitions("Directive");
|
|
|
|
DirectiveLanguage DirLang = DirectiveLanguage{DirectiveLanguages[0]};
|
|
|
|
const auto &Clauses = Records.getAllDerivedDefinitions("Clause");
|
|
|
|
if (!DirLang.getIncludeHeader().empty())
|
|
OS << "#include \"" << DirLang.getIncludeHeader() << "\"\n\n";
|
|
|
|
OS << "#include \"llvm/ADT/StringRef.h\"\n";
|
|
OS << "#include \"llvm/ADT/StringSwitch.h\"\n";
|
|
OS << "#include \"llvm/Support/ErrorHandling.h\"\n";
|
|
OS << "\n";
|
|
OS << "using namespace llvm;\n";
|
|
llvm::SmallVector<StringRef, 2> Namespaces;
|
|
llvm::SplitString(DirLang.getCppNamespace(), Namespaces, "::");
|
|
for (auto Ns : Namespaces)
|
|
OS << "using namespace " << Ns << ";\n";
|
|
|
|
// getDirectiveKind(StringRef Str)
|
|
GenerateGetKind(Directives, OS, "Directive", DirLang,
|
|
DirLang.getDirectivePrefix(), /*ImplicitAsUnknown=*/false);
|
|
|
|
// getDirectiveName(Directive Kind)
|
|
GenerateGetName(Directives, OS, "Directive", DirLang,
|
|
DirLang.getDirectivePrefix());
|
|
|
|
// getClauseKind(StringRef Str)
|
|
GenerateGetKind(Clauses, OS, "Clause", DirLang, DirLang.getClausePrefix(),
|
|
/*ImplicitAsUnknown=*/true);
|
|
|
|
// getClauseName(Clause Kind)
|
|
GenerateGetName(Clauses, OS, "Clause", DirLang, DirLang.getClausePrefix());
|
|
|
|
// isAllowedClauseForDirective(Directive D, Clause C, unsigned Version)
|
|
GenerateIsAllowedClause(Directives, OS, DirLang);
|
|
}
|
|
|
|
} // namespace llvm
|