1 /*
2    +----------------------------------------------------------------------+
3    | Zend OPcache                                                         |
4    +----------------------------------------------------------------------+
5    | Copyright (c) 1998-2018 The PHP Group                                |
6    +----------------------------------------------------------------------+
7    | This source file is subject to version 3.01 of the PHP license,      |
8    | that is bundled with this package in the file LICENSE, and is        |
9    | available through the world-wide-web at the following url:           |
10    | http://www.php.net/license/3_01.txt                                  |
11    | If you did not receive a copy of the PHP license and are unable to   |
12    | obtain it through the world-wide-web, please send a note to          |
13    | license@php.net so we can mail you a copy immediately.               |
14    +----------------------------------------------------------------------+
15    | Authors: Andi Gutmans <andi@php.net>                                 |
16    |          Zeev Suraski <zeev@php.net>                                 |
17    |          Stanislav Malyshev <stas@zend.com>                          |
18    |          Dmitry Stogov <dmitry@php.net>                              |
19    +----------------------------------------------------------------------+
20 */
21 
22 #ifndef ZEND_OPTIMIZER_H
23 #define ZEND_OPTIMIZER_H
24 
25 #include "zend.h"
26 #include "zend_compile.h"
27 
28 #define ZEND_OPTIMIZER_PASS_1		(1<<0)   /* CSE, STRING construction     */
29 #define ZEND_OPTIMIZER_PASS_2		(1<<1)   /* Constant conversion and jumps */
30 #define ZEND_OPTIMIZER_PASS_3		(1<<2)   /* ++, +=, series of jumps      */
31 #define ZEND_OPTIMIZER_PASS_4		(1<<3)   /* INIT_FCALL_BY_NAME -> DO_FCALL */
32 #define ZEND_OPTIMIZER_PASS_5		(1<<4)   /* CFG based optimization       */
33 #define ZEND_OPTIMIZER_PASS_6		(1<<5)   /* DFA based optimization       */
34 #define ZEND_OPTIMIZER_PASS_7		(1<<6)   /* CALL GRAPH optimization      */
35 #define ZEND_OPTIMIZER_PASS_8		(1<<7)   /* SCCP (constant propagation)  */
36 #define ZEND_OPTIMIZER_PASS_9		(1<<8)   /* TMP VAR usage                */
37 #define ZEND_OPTIMIZER_PASS_10		(1<<9)   /* NOP removal                 */
38 #define ZEND_OPTIMIZER_PASS_11		(1<<10)  /* Merge equal constants       */
39 #define ZEND_OPTIMIZER_PASS_12		(1<<11)  /* Adjust used stack           */
40 #define ZEND_OPTIMIZER_PASS_13		(1<<12)  /* Remove unused variables     */
41 #define ZEND_OPTIMIZER_PASS_14		(1<<13)  /* DCE (dead code elimination) */
42 #define ZEND_OPTIMIZER_PASS_15		(1<<14)  /* (unsafe) Collect constants */
43 #define ZEND_OPTIMIZER_PASS_16		(1<<15)  /* Inline functions */
44 
45 #define ZEND_OPTIMIZER_IGNORE_OVERLOADING	(1<<16)  /* (unsafe) Ignore possibility of operator overloading */
46 
47 #define ZEND_OPTIMIZER_ALL_PASSES	0x7FFFFFFF
48 
49 #define DEFAULT_OPTIMIZATION_LEVEL  "0x7FFEBFFF"
50 
51 
52 #define ZEND_DUMP_AFTER_PASS_1		ZEND_OPTIMIZER_PASS_1
53 #define ZEND_DUMP_AFTER_PASS_2		ZEND_OPTIMIZER_PASS_2
54 #define ZEND_DUMP_AFTER_PASS_3		ZEND_OPTIMIZER_PASS_3
55 #define ZEND_DUMP_AFTER_PASS_4		ZEND_OPTIMIZER_PASS_4
56 #define ZEND_DUMP_AFTER_PASS_5		ZEND_OPTIMIZER_PASS_5
57 #define ZEND_DUMP_AFTER_PASS_6		ZEND_OPTIMIZER_PASS_6
58 #define ZEND_DUMP_AFTER_PASS_7		ZEND_OPTIMIZER_PASS_7
59 #define ZEND_DUMP_AFTER_PASS_8		ZEND_OPTIMIZER_PASS_8
60 #define ZEND_DUMP_AFTER_PASS_9		ZEND_OPTIMIZER_PASS_9
61 #define ZEND_DUMP_AFTER_PASS_10		ZEND_OPTIMIZER_PASS_10
62 #define ZEND_DUMP_AFTER_PASS_11		ZEND_OPTIMIZER_PASS_11
63 #define ZEND_DUMP_AFTER_PASS_12		ZEND_OPTIMIZER_PASS_12
64 #define ZEND_DUMP_AFTER_PASS_13		ZEND_OPTIMIZER_PASS_13
65 #define ZEND_DUMP_AFTER_PASS_14		ZEND_OPTIMIZER_PASS_14
66 
67 #define ZEND_DUMP_BEFORE_OPTIMIZER  (1<<16)
68 #define ZEND_DUMP_AFTER_OPTIMIZER   (1<<17)
69 
70 #define ZEND_DUMP_BEFORE_BLOCK_PASS (1<<18)
71 #define ZEND_DUMP_AFTER_BLOCK_PASS  (1<<19)
72 #define ZEND_DUMP_BLOCK_PASS_VARS   (1<<20)
73 
74 #define ZEND_DUMP_BEFORE_DFA_PASS   (1<<21)
75 #define ZEND_DUMP_AFTER_DFA_PASS    (1<<22)
76 #define ZEND_DUMP_DFA_CFG           (1<<23)
77 #define ZEND_DUMP_DFA_DOMINATORS    (1<<24)
78 #define ZEND_DUMP_DFA_LIVENESS      (1<<25)
79 #define ZEND_DUMP_DFA_PHI           (1<<26)
80 #define ZEND_DUMP_DFA_SSA           (1<<27)
81 #define ZEND_DUMP_DFA_SSA_VARS      (1<<28)
82 #define ZEND_DUMP_SCCP              (1<<29)
83 
84 typedef struct _zend_script {
85 	zend_string   *filename;
86 	zend_op_array  main_op_array;
87 	HashTable      function_table;
88 	HashTable      class_table;
89 	uint32_t       first_early_binding_opline; /* the linked list of delayed declarations */
90 } zend_script;
91 
92 int zend_optimize_script(zend_script *script, zend_long optimization_level, zend_long debug_level);
93 int zend_optimizer_startup(void);
94 int zend_optimizer_shutdown(void);
95 
96 #endif
97