晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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/*
+----------------------------------------------------------------------+
| Zend OPcache |
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| 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: |
| https://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. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Stanislav Malyshev <stas@zend.com> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#ifndef ZEND_OPTIMIZER_H
#define ZEND_OPTIMIZER_H
#include "zend.h"
#include "zend_compile.h"
#define ZEND_OPTIMIZER_PASS_1 (1<<0) /* Simple local optimizations */
#define ZEND_OPTIMIZER_PASS_2 (1<<1) /* */
#define ZEND_OPTIMIZER_PASS_3 (1<<2) /* Jump optimization */
#define ZEND_OPTIMIZER_PASS_4 (1<<3) /* INIT_FCALL_BY_NAME -> DO_FCALL */
#define ZEND_OPTIMIZER_PASS_5 (1<<4) /* CFG based optimization */
#define ZEND_OPTIMIZER_PASS_6 (1<<5) /* DFA based optimization */
#define ZEND_OPTIMIZER_PASS_7 (1<<6) /* CALL GRAPH optimization */
#define ZEND_OPTIMIZER_PASS_8 (1<<7) /* SCCP (constant propagation) */
#define ZEND_OPTIMIZER_PASS_9 (1<<8) /* TMP VAR usage */
#define ZEND_OPTIMIZER_PASS_10 (1<<9) /* NOP removal */
#define ZEND_OPTIMIZER_PASS_11 (1<<10) /* Merge equal constants */
#define ZEND_OPTIMIZER_PASS_12 (1<<11) /* Adjust used stack */
#define ZEND_OPTIMIZER_PASS_13 (1<<12) /* Remove unused variables */
#define ZEND_OPTIMIZER_PASS_14 (1<<13) /* DCE (dead code elimination) */
#define ZEND_OPTIMIZER_PASS_15 (1<<14) /* (unsafe) Collect constants */
#define ZEND_OPTIMIZER_PASS_16 (1<<15) /* Inline functions */
#define ZEND_OPTIMIZER_IGNORE_OVERLOADING (1<<16) /* (unsafe) Ignore possibility of operator overloading */
#define ZEND_OPTIMIZER_NARROW_TO_DOUBLE (1<<17) /* try to narrow long constant assignments to double */
#define ZEND_OPTIMIZER_ALL_PASSES 0x7FFFFFFF
#define DEFAULT_OPTIMIZATION_LEVEL "0x7FFEBFFF"
#define ZEND_DUMP_AFTER_PASS_1 ZEND_OPTIMIZER_PASS_1
#define ZEND_DUMP_AFTER_PASS_2 ZEND_OPTIMIZER_PASS_2
#define ZEND_DUMP_AFTER_PASS_3 ZEND_OPTIMIZER_PASS_3
#define ZEND_DUMP_AFTER_PASS_4 ZEND_OPTIMIZER_PASS_4
#define ZEND_DUMP_AFTER_PASS_5 ZEND_OPTIMIZER_PASS_5
#define ZEND_DUMP_AFTER_PASS_6 ZEND_OPTIMIZER_PASS_6
#define ZEND_DUMP_AFTER_PASS_7 ZEND_OPTIMIZER_PASS_7
#define ZEND_DUMP_AFTER_PASS_8 ZEND_OPTIMIZER_PASS_8
#define ZEND_DUMP_AFTER_PASS_9 ZEND_OPTIMIZER_PASS_9
#define ZEND_DUMP_AFTER_PASS_10 ZEND_OPTIMIZER_PASS_10
#define ZEND_DUMP_AFTER_PASS_11 ZEND_OPTIMIZER_PASS_11
#define ZEND_DUMP_AFTER_PASS_12 ZEND_OPTIMIZER_PASS_12
#define ZEND_DUMP_AFTER_PASS_13 ZEND_OPTIMIZER_PASS_13
#define ZEND_DUMP_AFTER_PASS_14 ZEND_OPTIMIZER_PASS_14
#define ZEND_DUMP_BEFORE_OPTIMIZER (1<<16)
#define ZEND_DUMP_AFTER_OPTIMIZER (1<<17)
#define ZEND_DUMP_BEFORE_BLOCK_PASS (1<<18)
#define ZEND_DUMP_AFTER_BLOCK_PASS (1<<19)
#define ZEND_DUMP_BLOCK_PASS_VARS (1<<20)
#define ZEND_DUMP_BEFORE_DFA_PASS (1<<21)
#define ZEND_DUMP_AFTER_DFA_PASS (1<<22)
#define ZEND_DUMP_DFA_CFG (1<<23)
#define ZEND_DUMP_DFA_DOMINATORS (1<<24)
#define ZEND_DUMP_DFA_LIVENESS (1<<25)
#define ZEND_DUMP_DFA_PHI (1<<26)
#define ZEND_DUMP_DFA_SSA (1<<27)
#define ZEND_DUMP_DFA_SSA_VARS (1<<28)
#define ZEND_DUMP_SCCP (1<<29)
typedef struct _zend_script {
zend_string *filename;
zend_op_array main_op_array;
HashTable function_table;
HashTable class_table;
} zend_script;
typedef void (*zend_optimizer_pass_t)(zend_script *, void *context);
BEGIN_EXTERN_C()
ZEND_API void zend_optimize_script(zend_script *script, zend_long optimization_level, zend_long debug_level);
ZEND_API int zend_optimizer_register_pass(zend_optimizer_pass_t pass);
ZEND_API void zend_optimizer_unregister_pass(int idx);
zend_result zend_optimizer_startup(void);
zend_result zend_optimizer_shutdown(void);
END_EXTERN_C()
#endif