/usr/include/llvm-3.9/llvm/CodeGen/UnreachableBlockElim.h is in llvm-3.9-dev 1:3.9.1-19ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | //===-- UnreachableBlockElim.h - Remove unreachable blocks for codegen --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This pass is an extremely simple version of the SimplifyCFG pass. Its sole
// job is to delete LLVM basic blocks that are not reachable from the entry
// node. To do this, it performs a simple depth first traversal of the CFG,
// then deletes any unvisited nodes.
//
// Note that this pass is really a hack. In particular, the instruction
// selectors for various targets should just not generate code for unreachable
// blocks. Until LLVM has a more systematic way of defining instruction
// selectors, however, we cannot really expect them to handle additional
// complexity.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_UNREACHABLEBLOCKELIM_H
#define LLVM_LIB_CODEGEN_UNREACHABLEBLOCKELIM_H
#include "llvm/IR/PassManager.h"
namespace llvm {
class UnreachableBlockElimPass
: public PassInfoMixin<UnreachableBlockElimPass> {
public:
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
};
} // end namespace llvm
#endif // LLVM_LIB_CODEGEN_UNREACHABLEBLOCKELIM_H
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