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