/usr/include/hphp/hhbbc/dce.h is in hhvm-dev 3.11.1+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-2015 Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef incl_HHBBC_DCE_H_
#define incl_HHBBC_DCE_H_
#include <vector>
#include "hphp/runtime/base/type-string.h"
#include "hphp/hhbbc/misc.h"
namespace HPHP { namespace HHBBC {
struct Index;
struct State;
struct Context;
struct Bytecode;
struct FuncAnalysis;
namespace php { struct Block; }
//////////////////////////////////////////////////////////////////////
/*
* Perform DCE on a single basic block.
*/
void local_dce(const Index&, const FuncAnalysis&, borrowed_ptr<php::Block>,
const State&);
/*
* Eliminate dead code in a function, across basic blocks, based on
* results from a previous analyze_func call.
*/
void global_dce(const Index&, const FuncAnalysis&);
/*
* Assist in removing blocks that aren't reachable by removing
* conditional jumps that are never taken. Conditional jumps that are
* always taken are turned into unconditional jumps in first_pass.
*
* If options.RemoveDeadBlocks is off, this function just replaces
* blocks we believe are unreachable with fatal opcodes.
*/
void remove_unreachable_blocks(const Index&, const FuncAnalysis&);
//////////////////////////////////////////////////////////////////////
const StaticString s_unreachable("static analysis error: supposedly "
"unreachable code was reached");
//////////////////////////////////////////////////////////////////////
}}
#endif
|