66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
//===- Argument.h - Argument definitions ------------------------*- C++ -*-===//
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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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// This header file contains definitions for TableGen operation's arguments.
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// Operation arguments fall into two categories:
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//
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// 1. Operands: SSA values operated on by the operation
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// 2. Attributes: compile-time known properties that have influence over
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// the operation's behavior
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//
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// These two categories are modelled with the unified argument concept in
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// TableGen because we need similar pattern matching mechanisms for them.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_TABLEGEN_ARGUMENT_H_
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#define MLIR_TABLEGEN_ARGUMENT_H_
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#include "Attribute.h"
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#include "Type.h"
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#include "llvm/ADT/PointerUnion.h"
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#include <string>
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namespace llvm {
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class StringRef;
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} // end namespace llvm
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namespace mlir {
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namespace tblgen {
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// A struct wrapping an op attribute and its name together
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struct NamedAttribute {
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llvm::StringRef name;
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Attribute attr;
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};
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// A struct wrapping an op operand/result's constraint and its name together
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struct NamedTypeConstraint {
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// Returns true if this operand/result has constraint to be satisfied.
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bool hasPredicate() const;
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// Returns true if this is an optional type constraint. This is a special case
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// of variadic for 0 or 1 type.
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bool isOptional() const;
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// Returns true if this operand/result is variadic.
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bool isVariadic() const;
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// Returns true if this is a variable length type constraint. This is either
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// variadic or optional.
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bool isVariableLength() const { return isOptional() || isVariadic(); }
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llvm::StringRef name;
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TypeConstraint constraint;
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};
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// Operation argument: either attribute or operand
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using Argument = llvm::PointerUnion<NamedAttribute *, NamedTypeConstraint *>;
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} // end namespace tblgen
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} // end namespace mlir
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#endif // MLIR_TABLEGEN_ARGUMENT_H_
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