llvm/llvm/include/llvm/IR/Statepoint.h

//===- llvm/IR/Statepoint.h - gc.statepoint utilities -----------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains utility functions and a wrapper class analogous to
// CallBase for accessing the fields of gc.statepoint, gc.relocate,
// gc.result intrinsics; and some general utilities helpful when dealing with
// gc.statepoint.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_STATEPOINT_H
#define LLVM_IR_STATEPOINT_H

#include "llvm/ADT/iterator_range.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/MathExtras.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <optional>
#include <vector>

namespace llvm {

/// The statepoint intrinsic accepts a set of flags as its third argument.
/// Valid values come out of this set.
enum class StatepointFlags { … };

// These two are defined in IntrinsicInst since they're part of the
// IntrinsicInst class hierarchy.
class GCRelocateInst;

/// Represents a gc.statepoint intrinsic call.  This extends directly from
/// CallBase as the IntrinsicInst only supports calls and gc.statepoint is
/// invokable.
class GCStatepointInst : public CallBase { … };

std::vector<const GCRelocateInst *> GCStatepointInst::getGCRelocates() const { … }

/// Call sites that get wrapped by a gc.statepoint (currently only in
/// RewriteStatepointsForGC and potentially in other passes in the future) can
/// have attributes that describe properties of gc.statepoint call they will be
/// eventually be wrapped in.  This struct is used represent such directives.
struct StatepointDirectives { … };

/// Parse out statepoint directives from the function attributes present in \p
/// AS.
StatepointDirectives parseStatepointDirectivesFromAttrs(AttributeList AS);

/// Return \c true if the \p Attr is an attribute that is a statepoint
/// directive.
bool isStatepointDirectiveAttr(Attribute Attr);

} // end namespace llvm

#endif // LLVM_IR_STATEPOINT_H