1 //===-- EscapeEnumerator.h --------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Defines a helper class that enumerates all possible exits from a function, 11 // including exception handling. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_TRANSFORMS_UTILS_ESCAPEENUMERATOR_H 16 #define LLVM_TRANSFORMS_UTILS_ESCAPEENUMERATOR_H 17 18 #include "llvm/IR/IRBuilder.h" 19 #include "llvm/IR/Function.h" 20 21 namespace llvm { 22 23 /// EscapeEnumerator - This is a little algorithm to find all escape points 24 /// from a function so that "finally"-style code can be inserted. In addition 25 /// to finding the existing return and unwind instructions, it also (if 26 /// necessary) transforms any call instructions into invokes and sends them to 27 /// a landing pad. 28 class EscapeEnumerator { 29 Function &F; 30 const char *CleanupBBName; 31 32 Function::iterator StateBB, StateE; 33 IRBuilder<> Builder; 34 bool Done; 35 bool HandleExceptions; 36 37 public: 38 EscapeEnumerator(Function &F, const char *N = "cleanup", 39 bool HandleExceptions = true) 40 : F(F), CleanupBBName(N), StateBB(F.begin()), StateE(F.end()), 41 Builder(F.getContext()), Done(false), 42 HandleExceptions(HandleExceptions) {} 43 44 IRBuilder<> *Next(); 45 }; 46 47 } 48 49 #endif // LLVM_TRANSFORMS_UTILS_ESCAPEENUMERATOR_H 50
