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454 lines
17 KiB
454 lines
17 KiB
//===- OpInterfacesGen.cpp - MLIR op interface utility generator ----------===//
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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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// OpInterfacesGen generates definitions for operation interfaces.
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//
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//===----------------------------------------------------------------------===//
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#include "DocGenUtilities.h"
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#include "mlir/TableGen/Format.h"
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#include "mlir/TableGen/GenInfo.h"
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#include "mlir/TableGen/Interfaces.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/Support/FormatVariadic.h"
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#include "llvm/Support/raw_ostream.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 mlir;
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using mlir::tblgen::Interface;
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using mlir::tblgen::InterfaceMethod;
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using mlir::tblgen::OpInterface;
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/// Emit a string corresponding to a C++ type, followed by a space if necessary.
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static raw_ostream &emitCPPType(StringRef type, raw_ostream &os) {
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type = type.trim();
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os << type;
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if (type.back() != '&' && type.back() != '*')
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os << " ";
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return os;
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}
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/// Emit the method name and argument list for the given method. If 'addThisArg'
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/// is true, then an argument is added to the beginning of the argument list for
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/// the concrete value.
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static void emitMethodNameAndArgs(const InterfaceMethod &method,
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raw_ostream &os, StringRef valueType,
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bool addThisArg, bool addConst) {
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os << method.getName() << '(';
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if (addThisArg)
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emitCPPType(valueType, os)
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<< "tablegen_opaque_val" << (method.arg_empty() ? "" : ", ");
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llvm::interleaveComma(method.getArguments(), os,
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[&](const InterfaceMethod::Argument &arg) {
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os << arg.type << " " << arg.name;
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});
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os << ')';
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if (addConst)
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os << " const";
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}
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/// Get an array of all OpInterface definitions but exclude those subclassing
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/// "DeclareOpInterfaceMethods".
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static std::vector<llvm::Record *>
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getAllOpInterfaceDefinitions(const llvm::RecordKeeper &recordKeeper) {
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std::vector<llvm::Record *> defs =
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recordKeeper.getAllDerivedDefinitions("OpInterface");
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llvm::erase_if(defs, [](const llvm::Record *def) {
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return def->isSubClassOf("DeclareOpInterfaceMethods");
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});
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return defs;
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}
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namespace {
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/// This struct is the base generator used when processing tablegen interfaces.
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class InterfaceGenerator {
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public:
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bool emitInterfaceDefs();
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bool emitInterfaceDecls();
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bool emitInterfaceDocs();
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protected:
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InterfaceGenerator(std::vector<llvm::Record *> &&defs, raw_ostream &os)
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: defs(std::move(defs)), os(os) {}
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void emitConceptDecl(Interface &interface);
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void emitModelDecl(Interface &interface);
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void emitModelMethodsDef(Interface &interface);
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void emitTraitDecl(Interface &interface, StringRef interfaceName,
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StringRef interfaceTraitsName);
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void emitInterfaceDecl(Interface interface);
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/// The set of interface records to emit.
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std::vector<llvm::Record *> defs;
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// The stream to emit to.
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raw_ostream &os;
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/// The C++ value type of the interface, e.g. Operation*.
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StringRef valueType;
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/// The C++ base interface type.
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StringRef interfaceBaseType;
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/// The name of the typename for the value template.
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StringRef valueTemplate;
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/// The format context to use for methods.
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tblgen::FmtContext nonStaticMethodFmt;
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tblgen::FmtContext traitMethodFmt;
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};
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/// A specialized generator for attribute interfaces.
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struct AttrInterfaceGenerator : public InterfaceGenerator {
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AttrInterfaceGenerator(const llvm::RecordKeeper &records, raw_ostream &os)
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: InterfaceGenerator(records.getAllDerivedDefinitions("AttrInterface"),
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os) {
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valueType = "::mlir::Attribute";
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interfaceBaseType = "AttributeInterface";
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valueTemplate = "ConcreteAttr";
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StringRef castCode = "(tablegen_opaque_val.cast<ConcreteAttr>())";
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nonStaticMethodFmt.addSubst("_attr", castCode).withSelf(castCode);
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traitMethodFmt.addSubst("_attr",
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"(*static_cast<const ConcreteAttr *>(this))");
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}
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};
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/// A specialized generator for operation interfaces.
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struct OpInterfaceGenerator : public InterfaceGenerator {
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OpInterfaceGenerator(const llvm::RecordKeeper &records, raw_ostream &os)
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: InterfaceGenerator(getAllOpInterfaceDefinitions(records), os) {
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valueType = "::mlir::Operation *";
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interfaceBaseType = "OpInterface";
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valueTemplate = "ConcreteOp";
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StringRef castCode = "(llvm::cast<ConcreteOp>(tablegen_opaque_val))";
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nonStaticMethodFmt.withOp(castCode).withSelf(castCode);
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traitMethodFmt.withOp("(*static_cast<ConcreteOp *>(this))");
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}
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};
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/// A specialized generator for type interfaces.
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struct TypeInterfaceGenerator : public InterfaceGenerator {
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TypeInterfaceGenerator(const llvm::RecordKeeper &records, raw_ostream &os)
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: InterfaceGenerator(records.getAllDerivedDefinitions("TypeInterface"),
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os) {
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valueType = "::mlir::Type";
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interfaceBaseType = "TypeInterface";
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valueTemplate = "ConcreteType";
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StringRef castCode = "(tablegen_opaque_val.cast<ConcreteType>())";
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nonStaticMethodFmt.addSubst("_type", castCode).withSelf(castCode);
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traitMethodFmt.addSubst("_type",
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"(*static_cast<const ConcreteType *>(this))");
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}
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};
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} // end anonymous namespace
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//===----------------------------------------------------------------------===//
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// GEN: Interface definitions
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//===----------------------------------------------------------------------===//
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static void emitInterfaceDef(Interface interface, StringRef valueType,
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raw_ostream &os) {
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StringRef interfaceName = interface.getName();
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StringRef cppNamespace = interface.getCppNamespace();
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cppNamespace.consume_front("::");
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// Insert the method definitions.
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bool isOpInterface = isa<OpInterface>(interface);
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for (auto &method : interface.getMethods()) {
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emitCPPType(method.getReturnType(), os);
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if (!cppNamespace.empty())
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os << cppNamespace << "::";
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os << interfaceName << "::";
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emitMethodNameAndArgs(method, os, valueType, /*addThisArg=*/false,
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/*addConst=*/!isOpInterface);
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// Forward to the method on the concrete operation type.
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os << " {\n return getImpl()->" << method.getName() << '(';
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if (!method.isStatic()) {
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os << (isOpInterface ? "getOperation()" : "*this");
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os << (method.arg_empty() ? "" : ", ");
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}
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llvm::interleaveComma(
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method.getArguments(), os,
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[&](const InterfaceMethod::Argument &arg) { os << arg.name; });
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os << ");\n }\n";
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}
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}
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bool InterfaceGenerator::emitInterfaceDefs() {
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llvm::emitSourceFileHeader("Interface Definitions", os);
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for (const auto *def : defs)
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emitInterfaceDef(Interface(def), valueType, os);
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return false;
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}
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//===----------------------------------------------------------------------===//
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// GEN: Interface declarations
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//===----------------------------------------------------------------------===//
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void InterfaceGenerator::emitConceptDecl(Interface &interface) {
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os << " struct Concept {\n";
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// Insert each of the pure virtual concept methods.
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for (auto &method : interface.getMethods()) {
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os << " ";
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emitCPPType(method.getReturnType(), os);
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os << "(*" << method.getName() << ")(";
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if (!method.isStatic())
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emitCPPType(valueType, os) << (method.arg_empty() ? "" : ", ");
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llvm::interleaveComma(
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method.getArguments(), os,
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[&](const InterfaceMethod::Argument &arg) { os << arg.type; });
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os << ");\n";
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}
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os << " };\n";
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}
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void InterfaceGenerator::emitModelDecl(Interface &interface) {
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os << " template<typename " << valueTemplate << ">\n";
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os << " class Model : public Concept {\n public:\n";
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os << " Model() : Concept{";
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llvm::interleaveComma(
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interface.getMethods(), os,
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[&](const InterfaceMethod &method) { os << method.getName(); });
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os << "} {}\n\n";
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// Insert each of the virtual method overrides.
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for (auto &method : interface.getMethods()) {
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emitCPPType(method.getReturnType(), os << " static inline ");
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emitMethodNameAndArgs(method, os, valueType,
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/*addThisArg=*/!method.isStatic(),
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/*addConst=*/false);
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os << ";\n";
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}
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os << " };\n";
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}
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void InterfaceGenerator::emitModelMethodsDef(Interface &interface) {
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for (auto &method : interface.getMethods()) {
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os << "template<typename " << valueTemplate << ">\n";
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emitCPPType(method.getReturnType(), os);
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os << "detail::" << interface.getName() << "InterfaceTraits::Model<"
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<< valueTemplate << ">::";
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emitMethodNameAndArgs(method, os, valueType,
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/*addThisArg=*/!method.isStatic(),
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/*addConst=*/false);
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os << " {\n ";
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// Check for a provided body to the function.
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if (Optional<StringRef> body = method.getBody()) {
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if (method.isStatic())
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os << body->trim();
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else
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os << tblgen::tgfmt(body->trim(), &nonStaticMethodFmt);
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os << "\n}\n";
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continue;
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}
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// Forward to the method on the concrete operation type.
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if (method.isStatic())
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os << "return " << valueTemplate << "::";
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else
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os << tblgen::tgfmt("return $_self.", &nonStaticMethodFmt);
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// Add the arguments to the call.
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os << method.getName() << '(';
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llvm::interleaveComma(
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method.getArguments(), os,
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[&](const InterfaceMethod::Argument &arg) { os << arg.name; });
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os << ");\n}\n";
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}
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}
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void InterfaceGenerator::emitTraitDecl(Interface &interface,
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StringRef interfaceName,
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StringRef interfaceTraitsName) {
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os << llvm::formatv(" template <typename {3}>\n"
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" struct {0}Trait : public ::mlir::{2}<{0},"
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" detail::{1}>::Trait<{3}> {{\n",
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interfaceName, interfaceTraitsName, interfaceBaseType,
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valueTemplate);
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// Insert the default implementation for any methods.
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bool isOpInterface = isa<OpInterface>(interface);
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for (auto &method : interface.getMethods()) {
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// Flag interface methods named verifyTrait.
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if (method.getName() == "verifyTrait")
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PrintFatalError(
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formatv("'verifyTrait' method cannot be specified as interface "
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"method for '{0}'; use the 'verify' field instead",
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interfaceName));
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auto defaultImpl = method.getDefaultImplementation();
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if (!defaultImpl)
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continue;
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os << " " << (method.isStatic() ? "static " : "");
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emitCPPType(method.getReturnType(), os);
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emitMethodNameAndArgs(method, os, valueType, /*addThisArg=*/false,
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/*addConst=*/!isOpInterface);
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os << " {\n " << tblgen::tgfmt(defaultImpl->trim(), &traitMethodFmt)
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<< "\n }\n";
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}
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if (auto verify = interface.getVerify()) {
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assert(isa<OpInterface>(interface) && "only OpInterface supports 'verify'");
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tblgen::FmtContext verifyCtx;
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verifyCtx.withOp("op");
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os << " static ::mlir::LogicalResult verifyTrait(::mlir::Operation *op) "
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"{\n "
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<< tblgen::tgfmt(verify->trim(), &verifyCtx) << "\n }\n";
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}
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if (auto extraTraitDecls = interface.getExtraTraitClassDeclaration())
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os << tblgen::tgfmt(*extraTraitDecls, &traitMethodFmt) << "\n";
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os << " };\n";
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// Emit a utility wrapper trait class.
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os << llvm::formatv(" template <typename {1}>\n"
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" struct Trait : public {0}Trait<{1}> {{};\n",
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interfaceName, valueTemplate);
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}
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void InterfaceGenerator::emitInterfaceDecl(Interface interface) {
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llvm::SmallVector<StringRef, 2> namespaces;
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llvm::SplitString(interface.getCppNamespace(), namespaces, "::");
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for (StringRef ns : namespaces)
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os << "namespace " << ns << " {\n";
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StringRef interfaceName = interface.getName();
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auto interfaceTraitsName = (interfaceName + "InterfaceTraits").str();
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// Emit a forward declaration of the interface class so that it becomes usable
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// in the signature of its methods.
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os << "class " << interfaceName << ";\n";
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// Emit the traits struct containing the concept and model declarations.
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os << "namespace detail {\n"
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<< "struct " << interfaceTraitsName << " {\n";
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emitConceptDecl(interface);
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emitModelDecl(interface);
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os << "};\n} // end namespace detail\n";
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// Emit the main interface class declaration.
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os << llvm::formatv("class {0} : public ::mlir::{3}<{1}, detail::{2}> {\n"
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"public:\n"
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" using ::mlir::{3}<{1}, detail::{2}>::{3};\n",
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interfaceName, interfaceName, interfaceTraitsName,
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interfaceBaseType);
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// Emit the derived trait for the interface.
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emitTraitDecl(interface, interfaceName, interfaceTraitsName);
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// Insert the method declarations.
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bool isOpInterface = isa<OpInterface>(interface);
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for (auto &method : interface.getMethods()) {
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emitCPPType(method.getReturnType(), os << " ");
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emitMethodNameAndArgs(method, os, valueType, /*addThisArg=*/false,
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/*addConst=*/!isOpInterface);
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os << ";\n";
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}
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// Emit any extra declarations.
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if (Optional<StringRef> extraDecls = interface.getExtraClassDeclaration())
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os << *extraDecls << "\n";
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os << "};\n";
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emitModelMethodsDef(interface);
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for (StringRef ns : llvm::reverse(namespaces))
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os << "} // namespace " << ns << "\n";
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}
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bool InterfaceGenerator::emitInterfaceDecls() {
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llvm::emitSourceFileHeader("Interface Declarations", os);
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for (const auto *def : defs)
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emitInterfaceDecl(Interface(def));
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return false;
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}
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//===----------------------------------------------------------------------===//
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// GEN: Interface documentation
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//===----------------------------------------------------------------------===//
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static void emitInterfaceDoc(const llvm::Record &interfaceDef,
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raw_ostream &os) {
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Interface interface(&interfaceDef);
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// Emit the interface name followed by the description.
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os << "## " << interface.getName() << " (" << interfaceDef.getName() << ")";
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if (auto description = interface.getDescription())
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mlir::tblgen::emitDescription(*description, os);
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// Emit the methods required by the interface.
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os << "\n### Methods:\n";
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for (const auto &method : interface.getMethods()) {
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// Emit the method name.
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os << "#### `" << method.getName() << "`\n\n```c++\n";
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// Emit the method signature.
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if (method.isStatic())
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os << "static ";
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emitCPPType(method.getReturnType(), os) << method.getName() << '(';
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llvm::interleaveComma(method.getArguments(), os,
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[&](const InterfaceMethod::Argument &arg) {
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emitCPPType(arg.type, os) << arg.name;
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});
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os << ");\n```\n";
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// Emit the description.
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if (auto description = method.getDescription())
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mlir::tblgen::emitDescription(*description, os);
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// If the body is not provided, this method must be provided by the user.
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if (!method.getBody())
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os << "\nNOTE: This method *must* be implemented by the user.\n\n";
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}
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}
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bool InterfaceGenerator::emitInterfaceDocs() {
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os << "<!-- Autogenerated by mlir-tblgen; don't manually edit -->\n";
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os << "# " << interfaceBaseType << " definitions\n";
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for (const auto *def : defs)
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emitInterfaceDoc(*def, os);
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return false;
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}
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//===----------------------------------------------------------------------===//
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// GEN: Interface registration hooks
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//===----------------------------------------------------------------------===//
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namespace {
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template <typename GeneratorT> struct InterfaceGenRegistration {
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InterfaceGenRegistration(StringRef genArg)
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: genDeclArg(("gen-" + genArg + "-interface-decls").str()),
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genDefArg(("gen-" + genArg + "-interface-defs").str()),
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genDocArg(("gen-" + genArg + "-interface-docs").str()),
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genDecls(genDeclArg, "Generate interface declarations",
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[](const llvm::RecordKeeper &records, raw_ostream &os) {
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return GeneratorT(records, os).emitInterfaceDecls();
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}),
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genDefs(genDefArg, "Generate interface definitions",
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[](const llvm::RecordKeeper &records, raw_ostream &os) {
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return GeneratorT(records, os).emitInterfaceDefs();
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}),
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genDocs(genDocArg, "Generate interface documentation",
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[](const llvm::RecordKeeper &records, raw_ostream &os) {
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return GeneratorT(records, os).emitInterfaceDocs();
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}) {}
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std::string genDeclArg, genDefArg, genDocArg;
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mlir::GenRegistration genDecls, genDefs, genDocs;
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};
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} // end anonymous namespace
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static InterfaceGenRegistration<AttrInterfaceGenerator> attrGen("attr");
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static InterfaceGenRegistration<OpInterfaceGenerator> opGen("op");
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static InterfaceGenRegistration<TypeInterfaceGenerator> typeGen("type");
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