mlir-hlo/tools/mlir-tblgen-builder/TableGen/Operator.h

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2021-07-23 11:38:34 +08:00
//===- Operator.h - Operator class ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Operator wrapper to simplify using TableGen Record defining a MLIR Op.
//
//===----------------------------------------------------------------------===//
#ifndef MLIR_TABLEGEN_OPERATOR_H_
#define MLIR_TABLEGEN_OPERATOR_H_
#include "mlir/Support/LLVM.h"
#include "Argument.h"
#include "Attribute.h"
#include "Builder.h"
#include "Dialect.h"
#include "Region.h"
#include "Successor.h"
#include "Trait.h"
#include "Type.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/SMLoc.h"
namespace llvm {
class DefInit;
class Record;
class StringInit;
} // end namespace llvm
namespace mlir {
namespace tblgen {
// Wrapper class that contains a MLIR op's information (e.g., operands,
// attributes) defined in TableGen and provides helper methods for
// accessing them.
class Operator {
public:
explicit Operator(const llvm::Record &def);
explicit Operator(const llvm::Record *def) : Operator(*def) {}
// Returns this op's dialect name.
StringRef getDialectName() const;
// Returns the operation name. The name will follow the "<dialect>.<op-name>"
// format if its dialect name is not empty.
std::string getOperationName() const;
// Returns this op's C++ class name.
StringRef getCppClassName() const;
// Returns this op's C++ class name prefixed with namespaces.
std::string getQualCppClassName() const;
// Returns this op's C++ namespace.
StringRef getCppNamespace() const;
// Returns the name of op's adaptor C++ class.
std::string getAdaptorName() const;
/// A class used to represent the decorators of an operator variable, i.e.
/// argument or result.
struct VariableDecorator {
public:
explicit VariableDecorator(const llvm::Record *def) : def(def) {}
const llvm::Record &getDef() const { return *def; }
protected:
// The TableGen definition of this decorator.
const llvm::Record *def;
};
// A utility iterator over a list of variable decorators.
struct VariableDecoratorIterator
: public llvm::mapped_iterator<llvm::Init *const *,
VariableDecorator (*)(llvm::Init *)> {
using reference = VariableDecorator;
/// Initializes the iterator to the specified iterator.
VariableDecoratorIterator(llvm::Init *const *it)
: llvm::mapped_iterator<llvm::Init *const *,
VariableDecorator (*)(llvm::Init *)>(it,
&unwrap) {}
static VariableDecorator unwrap(llvm::Init *init);
};
using var_decorator_iterator = VariableDecoratorIterator;
using var_decorator_range = llvm::iterator_range<VariableDecoratorIterator>;
using value_iterator = NamedTypeConstraint *;
using value_range = llvm::iterator_range<value_iterator>;
// Returns true if this op has variable length operands or results.
bool isVariadic() const;
// Returns true if default builders should not be generated.
bool skipDefaultBuilders() const;
// Op result iterators.
value_iterator result_begin();
value_iterator result_end();
value_range getResults();
// Returns the number of results this op produces.
int getNumResults() const;
// Returns the op result at the given `index`.
NamedTypeConstraint &getResult(int index) { return results[index]; }
const NamedTypeConstraint &getResult(int index) const {
return results[index];
}
// Returns the `index`-th result's type constraint.
TypeConstraint getResultTypeConstraint(int index) const;
// Returns the `index`-th result's name.
StringRef getResultName(int index) const;
// Returns the `index`-th result's decorators.
var_decorator_range getResultDecorators(int index) const;
// Returns the number of variable length results in this operation.
unsigned getNumVariableLengthResults() const;
// Op attribute iterators.
using attribute_iterator = const NamedAttribute *;
attribute_iterator attribute_begin() const;
attribute_iterator attribute_end() const;
llvm::iterator_range<attribute_iterator> getAttributes() const;
int getNumAttributes() const { return attributes.size(); }
int getNumNativeAttributes() const { return numNativeAttributes; }
// Op attribute accessors.
NamedAttribute &getAttribute(int index) { return attributes[index]; }
// Op operand iterators.
value_iterator operand_begin();
value_iterator operand_end();
value_range getOperands();
int getNumOperands() const { return operands.size(); }
NamedTypeConstraint &getOperand(int index) { return operands[index]; }
const NamedTypeConstraint &getOperand(int index) const {
return operands[index];
}
// Returns the number of variadic operands in this operation.
unsigned getNumVariableLengthOperands() const;
// Returns the total number of arguments.
int getNumArgs() const { return arguments.size(); }
// Returns true of the operation has a single variadic arg.
bool hasSingleVariadicArg() const;
// Returns true if the operation has a single variadic result.
bool hasSingleVariadicResult() const {
return getNumResults() == 1 && getResult(0).isVariadic();
}
// Returns true of the operation has no variadic regions.
bool hasNoVariadicRegions() const { return getNumVariadicRegions() == 0; }
using arg_iterator = const Argument *;
using arg_range = llvm::iterator_range<arg_iterator>;
// Op argument (attribute or operand) iterators.
arg_iterator arg_begin() const;
arg_iterator arg_end() const;
arg_range getArgs() const;
// Op argument (attribute or operand) accessors.
Argument getArg(int index) const;
StringRef getArgName(int index) const;
var_decorator_range getArgDecorators(int index) const;
// Returns the trait wrapper for the given MLIR C++ `trait`.
const Trait *getTrait(llvm::StringRef trait) const;
// Regions.
using const_region_iterator = const NamedRegion *;
const_region_iterator region_begin() const;
const_region_iterator region_end() const;
llvm::iterator_range<const_region_iterator> getRegions() const;
// Returns the number of regions.
unsigned getNumRegions() const;
// Returns the `index`-th region.
const NamedRegion &getRegion(unsigned index) const;
// Returns the number of variadic regions in this operation.
unsigned getNumVariadicRegions() const;
// Successors.
using const_successor_iterator = const NamedSuccessor *;
const_successor_iterator successor_begin() const;
const_successor_iterator successor_end() const;
llvm::iterator_range<const_successor_iterator> getSuccessors() const;
// Returns the number of successors.
unsigned getNumSuccessors() const;
// Returns the `index`-th successor.
const NamedSuccessor &getSuccessor(unsigned index) const;
// Returns the number of variadic successors in this operation.
unsigned getNumVariadicSuccessors() const;
// Trait.
using const_trait_iterator = const Trait *;
const_trait_iterator trait_begin() const;
const_trait_iterator trait_end() const;
llvm::iterator_range<const_trait_iterator> getTraits() const;
ArrayRef<llvm::SMLoc> getLoc() const;
// Query functions for the documentation of the operator.
bool hasDescription() const;
StringRef getDescription() const;
bool hasSummary() const;
StringRef getSummary() const;
// Query functions for the assembly format of the operator.
bool hasAssemblyFormat() const;
StringRef getAssemblyFormat() const;
// Returns this op's extra class declaration code.
StringRef getExtraClassDeclaration() const;
// Returns the Tablegen definition this operator was constructed from.
// TODO: do not expose the TableGen record, this is a temporary solution to
// OpEmitter requiring a Record because Operator does not provide enough
// methods.
const llvm::Record &getDef() const;
// Returns the dialect of the op.
const Dialect &getDialect() const { return dialect; }
// Prints the contents in this operator to the given `os`. This is used for
// debugging purposes.
void print(llvm::raw_ostream &os) const;
// Return whether all the result types are known.
bool allResultTypesKnown() const { return allResultsHaveKnownTypes; };
// Pair representing either a index to an argument or a type constraint. Only
// one of these entries should have the non-default value.
struct ArgOrType {
explicit ArgOrType(int index) : index(index), constraint(None) {}
explicit ArgOrType(TypeConstraint constraint)
: index(None), constraint(constraint) {}
bool isArg() const {
assert(constraint.hasValue() ^ index.hasValue());
return index.hasValue();
}
bool isType() const {
assert(constraint.hasValue() ^ index.hasValue());
return constraint.hasValue();
}
int getArg() const { return *index; }
TypeConstraint getType() const { return *constraint; }
private:
Optional<int> index;
Optional<TypeConstraint> constraint;
};
// Return all arguments or type constraints with same type as result[index].
// Requires: all result types are known.
ArrayRef<ArgOrType> getSameTypeAsResult(int index) const;
// Pair consisting kind of argument and index into operands or attributes.
struct OperandOrAttribute {
enum class Kind { Operand, Attribute };
OperandOrAttribute(Kind kind, int index) {
packed = (index << 1) & (kind == Kind::Attribute);
}
int operandOrAttributeIndex() const { return (packed >> 1); }
Kind kind() { return (packed & 0x1) ? Kind::Attribute : Kind::Operand; }
private:
int packed;
};
// Returns the OperandOrAttribute corresponding to the index.
OperandOrAttribute getArgToOperandOrAttribute(int index) const;
// Returns the builders of this operation.
ArrayRef<Builder> getBuilders() const { return builders; }
private:
// Populates the vectors containing operands, attributes, results and traits.
void populateOpStructure();
// Populates type inference info (mostly equality) with input a mapping from
// names to indices for arguments and results.
void populateTypeInferenceInfo(
const llvm::StringMap<int> &argumentsAndResultsIndex);
// The dialect of this op.
Dialect dialect;
// The unqualified C++ class name of the op.
StringRef cppClassName;
// The C++ namespace for this op.
StringRef cppNamespace;
// The operands of the op.
SmallVector<NamedTypeConstraint, 4> operands;
// The attributes of the op. Contains native attributes (corresponding to the
// actual stored attributed of the operation) followed by derived attributes
// (corresponding to dynamic properties of the operation that are computed
// upon request).
SmallVector<NamedAttribute, 4> attributes;
// The arguments of the op (operands and native attributes).
SmallVector<Argument, 4> arguments;
// The results of the op.
SmallVector<NamedTypeConstraint, 4> results;
// The successors of this op.
SmallVector<NamedSuccessor, 0> successors;
// The traits of the op.
SmallVector<Trait, 4> traits;
// The regions of this op.
SmallVector<NamedRegion, 1> regions;
// The argument with the same type as the result.
SmallVector<SmallVector<ArgOrType, 2>, 4> resultTypeMapping;
// Map from argument to attribute or operand number.
SmallVector<OperandOrAttribute, 4> attrOrOperandMapping;
// The builders of this operator.
SmallVector<Builder> builders;
// The number of native attributes stored in the leading positions of
// `attributes`.
int numNativeAttributes;
// The TableGen definition of this op.
const llvm::Record &def;
// Whether the type of all results are known.
bool allResultsHaveKnownTypes;
};
} // end namespace tblgen
} // end namespace mlir
#endif // MLIR_TABLEGEN_OPERATOR_H_