llvm/llvm/include/llvm/IR/Function.h

//===- llvm/Function.h - Class to represent a single function ---*- 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 the declaration of the Function class, which represents a
// single function/procedure in LLVM.
//
// A function basically consists of a list of basic blocks, a list of arguments,
// and a symbol table.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_FUNCTION_H
#define LLVM_IR_FUNCTION_H

#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/IR/Argument.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalObject.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/OperandTraits.h"
#include "llvm/IR/SymbolTableListTraits.h"
#include "llvm/IR/Value.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <string>

namespace llvm {

namespace Intrinsic {
ID;
}

class AssemblyAnnotationWriter;
class Constant;
class ConstantRange;
class DataLayout;
struct DenormalMode;
class DISubprogram;
enum LibFunc : unsigned;
class LLVMContext;
class Module;
class raw_ostream;
class TargetLibraryInfoImpl;
class Type;
class User;
class BranchProbabilityInfo;
class BlockFrequencyInfo;

class LLVM_EXTERNAL_VISIBILITY Function : public GlobalObject,
                                          public ilist_node<Function> { … };

/// Check whether null pointer dereferencing is considered undefined behavior
/// for a given function or an address space.
/// Null pointer access in non-zero address space is not considered undefined.
/// Return value: false => null pointer dereference is undefined.
/// Return value: true =>  null pointer dereference is not undefined.
bool NullPointerIsDefined(const Function *F, unsigned AS = 0);

template <>
struct OperandTraits<Function> : public HungoffOperandTraits<3> { … };

DEFINE_TRANSPARENT_OPERAND_ACCESSORS(…)

} // end namespace llvm

#endif // LLVM_IR_FUNCTION_H