49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
//===-- EscapeEnumerator.h --------------------------------------*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Defines a helper class that enumerates all possible exits from a function,
|
|
// including exception handling.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_ESCAPEENUMERATOR_H
|
|
#define LLVM_TRANSFORMS_UTILS_ESCAPEENUMERATOR_H
|
|
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// EscapeEnumerator - This is a little algorithm to find all escape points
|
|
/// from a function so that "finally"-style code can be inserted. In addition
|
|
/// to finding the existing return and unwind instructions, it also (if
|
|
/// necessary) transforms any call instructions into invokes and sends them to
|
|
/// a landing pad.
|
|
class EscapeEnumerator {
|
|
Function &F;
|
|
const char *CleanupBBName;
|
|
|
|
Function::iterator StateBB, StateE;
|
|
IRBuilder<> Builder;
|
|
bool Done;
|
|
bool HandleExceptions;
|
|
|
|
public:
|
|
EscapeEnumerator(Function &F, const char *N = "cleanup",
|
|
bool HandleExceptions = true)
|
|
: F(F), CleanupBBName(N), StateBB(F.begin()), StateE(F.end()),
|
|
Builder(F.getContext()), Done(false),
|
|
HandleExceptions(HandleExceptions) {}
|
|
|
|
IRBuilder<> *Next();
|
|
};
|
|
|
|
}
|
|
|
|
#endif // LLVM_TRANSFORMS_UTILS_ESCAPEENUMERATOR_H
|