89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
//===- Constraint.h - Constraint class --------------------------*- 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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// Constraint wrapper to simplify using TableGen Record for constraints.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_TABLEGEN_CONSTRAINT_H_
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#define MLIR_TABLEGEN_CONSTRAINT_H_
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#include "mlir/Support/LLVM.h"
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#include "Predicate.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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class Record;
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} // end namespace llvm
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namespace mlir {
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namespace tblgen {
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// Wrapper class with helper methods for accessing Constraint defined in
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// TableGen.
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class Constraint {
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public:
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Constraint(const llvm::Record *record);
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bool operator==(const Constraint &that) { return def == that.def; }
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bool operator!=(const Constraint &that) { return def != that.def; }
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// Returns the predicate for this constraint.
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Pred getPredicate() const;
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// Returns the condition template that can be used to check if a type or
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// attribute satisfies this constraint. The template may contain "{0}" that
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// must be substituted with an expression returning an mlir::Type or
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// mlir::Attribute.
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std::string getConditionTemplate() const;
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// Returns the user-readable description of this constraint. If the
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// description is not provided, returns the TableGen def name.
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StringRef getSummary() const;
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// Constraint kind
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enum Kind { CK_Attr, CK_Region, CK_Successor, CK_Type, CK_Uncategorized };
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Kind getKind() const { return kind; }
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/// Get an opaque pointer to the constraint.
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const void *getAsOpaquePointer() const { return def; }
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/// Construct a constraint from the opaque pointer representation.
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static Constraint getFromOpaquePointer(const void *ptr) {
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return Constraint(reinterpret_cast<const llvm::Record *>(ptr));
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}
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protected:
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Constraint(Kind kind, const llvm::Record *record);
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// The TableGen definition of this constraint.
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const llvm::Record *def;
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private:
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// What kind of constraint this is.
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Kind kind;
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};
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// An constraint and the concrete entities to place the constraint on.
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struct AppliedConstraint {
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AppliedConstraint(Constraint &&constraint, StringRef self,
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std::vector<std::string> &&entities);
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Constraint constraint;
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// The symbol to replace `$_self` special placeholder in the constraint.
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std::string self;
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// The symbols to replace `$N` positional placeholders in the constraint.
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std::vector<std::string> entities;
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};
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} // end namespace tblgen
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} // end namespace mlir
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#endif // MLIR_TABLEGEN_CONSTRAINT_H_
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