Tim Starling
85 linhas
2.9 KiB
C++
85 linhas
2.9 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#ifndef incl_HPHP_JIT_MUTATION_H_
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#define incl_HPHP_JIT_MUTATION_H_
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#include "hphp/runtime/vm/jit/ir.h"
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#include "hphp/runtime/vm/jit/cfg.h"
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namespace HPHP { namespace JIT {
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//////////////////////////////////////////////////////////////////////
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/*
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* Utility routines for mutating the IR during optimization passes.
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*/
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//////////////////////////////////////////////////////////////////////
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/*
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* Clone a range of IRInstructions into the front of a target block
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* (immediately after its DefLabel, but before its Marker).
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*
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* Then, for any block reachable from `target', rewrite the sources of
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* any instructions that referred to the old destinations of the
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* cloned instructions so that they refer to the new destinations this
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* function created.
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*
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* Does not unlink the instructions from the source block.
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*
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* Pre: The range [first,last) may not contain control flow
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* instructions.
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* Pre: isRPOSorted(blocks)
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*/
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void cloneToBlock(const BlockList& blocks,
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IRFactory* irFactory,
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Block::iterator first,
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Block::iterator last,
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Block* dst);
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/*
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* Move a range of IRInstructions to the front of a target block
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* (immediately after its DefLabel, but before its Marker).
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*
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* The instructions are unlinked from their current source block.
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*
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* Pre: The range [first,last) may not contain control flow
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* instructions.
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*/
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void moveToBlock(Block::iterator first,
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Block::iterator last,
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Block* dst);
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/*
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* Given a block where some SSATmps have changed type, walk the
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* sub-cfg reachable from that block and recompute the types of any
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* tmps that depend on it.
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*
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* The new types of any changed SSATmps must be related to their old
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* types.
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*
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* Pre: isRPOSorted(blocks)
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*/
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void reflowTypes(Block*, const BlockList& blocks);
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//////////////////////////////////////////////////////////////////////
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}}
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#endif
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