mirror of
https://github.com/php/php-src.git
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588 lines
18 KiB
C
588 lines
18 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend OPcache |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2014 The PHP Group |
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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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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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| Stanislav Malyshev <stas@zend.com> |
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| Dmitry Stogov <dmitry@zend.com> |
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+----------------------------------------------------------------------+
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*/
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#include "php.h"
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#include "Optimizer/zend_optimizer.h"
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#include "Optimizer/zend_optimizer_internal.h"
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#include "zend_API.h"
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#include "zend_constants.h"
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#include "zend_execute.h"
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#include "zend_vm.h"
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#define OPTIMIZATION_LEVEL \
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ZCG(accel_directives).optimization_level
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static void zend_optimizer_zval_dtor_wrapper(zval *zvalue)
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{
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zval_dtor(zvalue);
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}
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static void zend_optimizer_collect_constant(HashTable **constants, zval *name, zval* value)
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{
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zval val;
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if (!*constants) {
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*constants = emalloc(sizeof(HashTable));
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zend_hash_init(*constants, 16, NULL, zend_optimizer_zval_dtor_wrapper, 0);
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}
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ZVAL_DUP(&val, value);
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zend_hash_add(*constants, Z_STR_P(name), &val);
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}
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static int zend_optimizer_get_collected_constant(HashTable *constants, zval *name, zval* value)
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{
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zval *val;
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if ((val = zend_hash_find(constants, Z_STR_P(name))) != NULL) {
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ZVAL_DUP(value, val);
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return 1;
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}
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return 0;
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}
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#if ZEND_EXTENSION_API_NO >= PHP_5_5_X_API_NO
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static int zend_optimizer_lookup_cv(zend_op_array *op_array, zend_string* name)
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{
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int i = 0;
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ulong hash_value = STR_HASH_VAL(name);
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while (i < op_array->last_var) {
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if (op_array->vars[i] == name ||
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(op_array->vars[i]->h == hash_value &&
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op_array->vars[i]->len == name->len &&
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memcmp(op_array->vars[i], name->val, name->len) == 0)) {
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return i;
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}
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i++;
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}
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i = op_array->last_var;
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op_array->last_var++;
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op_array->vars = erealloc(op_array->vars, op_array->last_var * sizeof(zend_string*));
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op_array->vars[i] = STR_DUP(name, 0);
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return i;
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}
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#endif
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#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
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int zend_optimizer_add_literal(zend_op_array *op_array, zval *zv TSRMLS_DC)
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{
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int i = op_array->last_literal;
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op_array->last_literal++;
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op_array->literals = (zend_literal*)erealloc(op_array->literals, op_array->last_literal * sizeof(zend_literal));
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ZVAL_COPY_VALUE(&op_array->literals[i].constant, zv);
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op_array->literals[i].cache_slot = -1;
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//??? Z_SET_REFCOUNT(op_array->literals[i].constant, 2);
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//??? Z_SET_ISREF(op_array->literals[i].constant);
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return i;
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}
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# define LITERAL_LONG(op, val) do { \
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zval _c; \
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ZVAL_LONG(&_c, val); \
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op.constant = zend_optimizer_add_literal(op_array, &_c TSRMLS_CC); \
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} while (0)
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# define LITERAL_BOOL(op, val) do { \
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zval _c; \
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ZVAL_BOOL(&_c, val); \
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op.constant = zend_optimizer_add_literal(op_array, &_c TSRMLS_CC); \
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} while (0)
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# define literal_dtor(zv) do { \
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zval_dtor(zv); \
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Z_TYPE_P(zv) = IS_NULL; \
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} while (0)
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#define COPY_NODE(target, src) do { \
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target ## _type = src ## _type; \
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target = src; \
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} while (0)
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#else
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# define LITERAL_LONG(op, val) ZVAL_LONG(&op.u.constant, val)
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# define LITERAL_BOOL(op, val) ZVAL_BOOL(&op.u.constant, val)
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# define literal_dtor(zv) zval_dtor(zv)
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#define COPY_NODE(target, src) do { \
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target = src; \
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} while (0)
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#endif
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static void update_op1_const(zend_op_array *op_array,
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zend_op *opline,
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zval *val TSRMLS_DC)
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{
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if (opline->opcode == ZEND_FREE) {
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MAKE_NOP(opline);
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zval_dtor(val);
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} else {
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ZEND_OP1_TYPE(opline) = IS_CONST;
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#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
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if (Z_TYPE_P(val) == IS_STRING) {
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switch (opline->opcode) {
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case ZEND_INIT_STATIC_METHOD_CALL:
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case ZEND_CATCH:
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case ZEND_FETCH_CONSTANT:
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opline->op1.constant = zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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STR_HASH_VAL(Z_STR(ZEND_OP1_LITERAL(opline)));
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//??? Z_HASH_P(&ZEND_OP1_LITERAL(opline)) = zend_hash_func(Z_STRVAL(ZEND_OP1_LITERAL(opline)), Z_STRLEN(ZEND_OP1_LITERAL(opline)) + 1);
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op_array->literals[opline->op1.constant].cache_slot = op_array->last_cache_slot++;
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zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
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zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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STR_HASH_VAL(Z_STR(op_array->literals[opline->op1.constant+1].constant));
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//??? op_array->literals[opline->op1.constant+1].hash_value = zend_hash_func(Z_STRVAL(op_array->literals[opline->op1.constant+1].constant), Z_STRLEN(op_array->literals[opline->op1.constant+1].constant) + 1);
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break;
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case ZEND_DO_FCALL:
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zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
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opline->op1.constant = zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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STR_HASH_VAL(Z_STR(ZEND_OP1_LITERAL(opline)));
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//??? Z_HASH_P(&ZEND_OP1_LITERAL(opline)) = zend_hash_func(Z_STRVAL(ZEND_OP1_LITERAL(opline)), Z_STRLEN(ZEND_OP1_LITERAL(opline)) + 1);
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op_array->literals[opline->op1.constant].cache_slot = op_array->last_cache_slot++;
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break;
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default:
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opline->op1.constant = zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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STR_HASH_VAL(Z_STR(ZEND_OP1_LITERAL(opline)));
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//??? Z_HASH_P(&ZEND_OP1_LITERAL(opline)) = zend_hash_func(Z_STRVAL(ZEND_OP1_LITERAL(opline)), Z_STRLEN(ZEND_OP1_LITERAL(opline)) + 1);
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break;
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}
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} else {
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opline->op1.constant = zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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}
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#else
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ZEND_OP1_LITERAL(opline) = *val;
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#endif
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}
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}
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static void update_op2_const(zend_op_array *op_array,
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zend_op *opline,
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zval *val TSRMLS_DC)
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{
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ZEND_OP2_TYPE(opline) = IS_CONST;
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#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
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opline->op2.constant = zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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if (Z_TYPE_P(val) == IS_STRING) {
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STR_HASH_VAL(Z_STR(ZEND_OP2_LITERAL(opline)));
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//??? Z_HASH_P(&ZEND_OP2_LITERAL(opline)) = zend_hash_func(Z_STRVAL(ZEND_OP2_LITERAL(opline)), Z_STRLEN(ZEND_OP2_LITERAL(opline)) + 1);
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switch (opline->opcode) {
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case ZEND_FETCH_R:
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case ZEND_FETCH_W:
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case ZEND_FETCH_RW:
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case ZEND_FETCH_IS:
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case ZEND_FETCH_UNSET:
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case ZEND_FETCH_FUNC_ARG:
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case ZEND_FETCH_CLASS:
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case ZEND_INIT_FCALL_BY_NAME:
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/*case ZEND_INIT_NS_FCALL_BY_NAME:*/
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case ZEND_UNSET_VAR:
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case ZEND_ISSET_ISEMPTY_VAR:
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case ZEND_ADD_INTERFACE:
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case ZEND_ADD_TRAIT:
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op_array->literals[opline->op2.constant].cache_slot = op_array->last_cache_slot++;
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zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
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zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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STR_HASH_VAL(Z_STR(op_array->literals[opline->op2.constant+1].constant));
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//??? op_array->literals[opline->op2.constant+1].hash_value = zend_hash_func(Z_STRVAL(op_array->literals[opline->op2.constant+1].constant), Z_STRLEN(op_array->literals[opline->op2.constant+1].constant) + 1);
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break;
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case ZEND_INIT_METHOD_CALL:
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case ZEND_INIT_STATIC_METHOD_CALL:
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zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val));
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zend_optimizer_add_literal(op_array, val TSRMLS_CC);
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STR_HASH_VAL(Z_STR(op_array->literals[opline->op2.constant+1].constant));
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//??? op_array->literals[opline->op2.constant+1].hash_value = zend_hash_func(Z_STRVAL(op_array->literals[opline->op2.constant+1].constant), Z_STRLEN(op_array->literals[opline->op2.constant+1].constant) + 1);
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/* break missing intentionally */
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/*case ZEND_FETCH_CONSTANT:*/
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case ZEND_ASSIGN_OBJ:
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case ZEND_FETCH_OBJ_R:
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case ZEND_FETCH_OBJ_W:
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case ZEND_FETCH_OBJ_RW:
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case ZEND_FETCH_OBJ_IS:
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case ZEND_FETCH_OBJ_UNSET:
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case ZEND_FETCH_OBJ_FUNC_ARG:
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case ZEND_UNSET_OBJ:
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case ZEND_PRE_INC_OBJ:
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case ZEND_PRE_DEC_OBJ:
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case ZEND_POST_INC_OBJ:
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case ZEND_POST_DEC_OBJ:
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case ZEND_ISSET_ISEMPTY_PROP_OBJ:
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op_array->literals[opline->op2.constant].cache_slot = op_array->last_cache_slot;
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op_array->last_cache_slot += 2;
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break;
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case ZEND_ASSIGN_ADD:
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case ZEND_ASSIGN_SUB:
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case ZEND_ASSIGN_MUL:
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case ZEND_ASSIGN_DIV:
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case ZEND_ASSIGN_MOD:
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case ZEND_ASSIGN_SL:
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case ZEND_ASSIGN_SR:
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case ZEND_ASSIGN_CONCAT:
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case ZEND_ASSIGN_BW_OR:
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case ZEND_ASSIGN_BW_AND:
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case ZEND_ASSIGN_BW_XOR:
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if (opline->extended_value == ZEND_ASSIGN_OBJ) {
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op_array->literals[opline->op2.constant].cache_slot = op_array->last_cache_slot;
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op_array->last_cache_slot += 2;
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}
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break;
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#if ZEND_EXTENSION_API_NO >= PHP_5_4_X_API_NO
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case ZEND_OP_DATA:
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if ((opline-1)->opcode == ZEND_ASSIGN_DIM ||
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((opline-1)->extended_value == ZEND_ASSIGN_DIM &&
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((opline-1)->opcode == ZEND_ASSIGN_ADD ||
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(opline-1)->opcode == ZEND_ASSIGN_SUB ||
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(opline-1)->opcode == ZEND_ASSIGN_MUL ||
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(opline-1)->opcode == ZEND_ASSIGN_DIV ||
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(opline-1)->opcode == ZEND_ASSIGN_MOD ||
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(opline-1)->opcode == ZEND_ASSIGN_SL ||
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(opline-1)->opcode == ZEND_ASSIGN_SR ||
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(opline-1)->opcode == ZEND_ASSIGN_CONCAT ||
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(opline-1)->opcode == ZEND_ASSIGN_BW_OR ||
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(opline-1)->opcode == ZEND_ASSIGN_BW_AND ||
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(opline-1)->opcode == ZEND_ASSIGN_BW_XOR))) {
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goto check_numeric;
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}
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break;
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case ZEND_ISSET_ISEMPTY_DIM_OBJ:
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case ZEND_ADD_ARRAY_ELEMENT:
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case ZEND_INIT_ARRAY:
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case ZEND_UNSET_DIM:
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case ZEND_FETCH_DIM_R:
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case ZEND_FETCH_DIM_W:
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case ZEND_FETCH_DIM_RW:
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case ZEND_FETCH_DIM_IS:
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case ZEND_FETCH_DIM_FUNC_ARG:
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case ZEND_FETCH_DIM_UNSET:
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case ZEND_FETCH_DIM_TMP_VAR:
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check_numeric:
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{
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ulong index;
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int numeric = 0;
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ZEND_HANDLE_NUMERIC_EX(Z_STRVAL_P(val), Z_STRLEN_P(val)+1, index, numeric = 1);
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if (numeric) {
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zval_dtor(val);
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ZVAL_LONG(val, index);
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op_array->literals[opline->op2.constant].constant = *val;
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}
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}
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break;
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#endif
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default:
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break;
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}
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}
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#else
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ZEND_OP2_LITERAL(opline) = *val;
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#endif
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}
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static int replace_var_by_const(zend_op_array *op_array,
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zend_op *opline,
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zend_uint var,
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zval *val TSRMLS_DC)
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{
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zend_op *end = op_array->opcodes + op_array->last;
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while (opline < end) {
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if (ZEND_OP1_TYPE(opline) == IS_VAR &&
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ZEND_OP1(opline).var == var) {
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switch (opline->opcode) {
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case ZEND_FETCH_DIM_W:
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case ZEND_FETCH_DIM_RW:
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case ZEND_FETCH_DIM_FUNC_ARG:
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case ZEND_FETCH_DIM_UNSET:
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case ZEND_ASSIGN_DIM:
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#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
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case ZEND_SEPARATE:
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#endif
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return 0;
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case ZEND_SEND_VAR_NO_REF:
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if (opline->extended_value & ZEND_ARG_COMPILE_TIME_BOUND) {
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if (opline->extended_value & ZEND_ARG_SEND_BY_REF) {
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return 0;
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}
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opline->extended_value = ZEND_DO_FCALL;
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} else {
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opline->extended_value = ZEND_DO_FCALL_BY_NAME;
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}
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opline->opcode = ZEND_SEND_VAL;
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break;
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default:
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break;
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}
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update_op1_const(op_array, opline, val TSRMLS_CC);
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break;
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}
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if (ZEND_OP2_TYPE(opline) == IS_VAR &&
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ZEND_OP2(opline).var == var) {
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switch (opline->opcode) {
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case ZEND_ASSIGN_REF:
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return 0;
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default:
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break;
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}
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update_op2_const(op_array, opline, val TSRMLS_CC);
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break;
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}
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opline++;
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}
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return 1;
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}
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static void replace_tmp_by_const(zend_op_array *op_array,
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zend_op *opline,
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zend_uint var,
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zval *val
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TSRMLS_DC)
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{
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zend_op *end = op_array->opcodes + op_array->last;
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while (opline < end) {
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if (ZEND_OP1_TYPE(opline) == IS_TMP_VAR &&
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ZEND_OP1(opline).var == var) {
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update_op1_const(op_array, opline, val TSRMLS_CC);
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/* TMP_VAR my be used only once */
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break;
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}
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if (ZEND_OP2_TYPE(opline) == IS_TMP_VAR &&
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ZEND_OP2(opline).var == var) {
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update_op2_const(op_array, opline, val TSRMLS_CC);
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/* TMP_VAR my be used only once */
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break;
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}
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opline++;
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}
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}
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#include "Optimizer/nop_removal.c"
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#include "Optimizer/block_pass.c"
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#include "Optimizer/optimize_temp_vars_5.c"
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#include "Optimizer/compact_literals.c"
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#include "Optimizer/optimize_func_calls.c"
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static void zend_optimize(zend_op_array *op_array,
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zend_persistent_script *script,
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HashTable **constants TSRMLS_DC)
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{
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if (op_array->type == ZEND_EVAL_CODE ||
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(op_array->fn_flags & ZEND_ACC_INTERACTIVE)) {
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return;
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}
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/* pass 1
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* - substitute persistent constants (true, false, null, etc)
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* - perform compile-time evaluation of constant binary and unary operations
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* - optimize series of ADD_STRING and/or ADD_CHAR
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* - convert CAST(IS_BOOL,x) into BOOL(x)
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*/
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#include "Optimizer/pass1_5.c"
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/* pass 2:
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* - convert non-numeric constants to numeric constants in numeric operators
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* - optimize constant conditional JMPs
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* - optimize static BRKs and CONTs
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* - pre-evaluate constant function calls
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*/
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#include "Optimizer/pass2.c"
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/* pass 3:
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* - optimize $i = $i+expr to $i+=expr
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* - optimize series of JMPs
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* - change $i++ to ++$i where possible
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*/
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#include "Optimizer/pass3.c"
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|
|
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
|
|
/* pass 4:
|
|
* - INIT_FCALL_BY_NAME -> DO_FCALL
|
|
*/
|
|
if (ZEND_OPTIMIZER_PASS_4 & OPTIMIZATION_LEVEL) {
|
|
optimize_func_calls(op_array, script TSRMLS_CC);
|
|
}
|
|
#endif
|
|
|
|
/* pass 5:
|
|
* - CFG optimization
|
|
*/
|
|
#include "Optimizer/pass5.c"
|
|
|
|
/* pass 9:
|
|
* - Optimize temp variables usage
|
|
*/
|
|
#include "Optimizer/pass9.c"
|
|
|
|
/* pass 10:
|
|
* - remove NOPs
|
|
*/
|
|
#include "Optimizer/pass10.c"
|
|
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
|
|
/* pass 11:
|
|
* - Compact literals table
|
|
*/
|
|
if (ZEND_OPTIMIZER_PASS_11 & OPTIMIZATION_LEVEL) {
|
|
optimizer_compact_literals(op_array TSRMLS_CC);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void zend_accel_optimize(zend_op_array *op_array,
|
|
zend_persistent_script *script,
|
|
HashTable **constants TSRMLS_DC)
|
|
{
|
|
zend_op *opline, *end;
|
|
|
|
/* Revert pass_two() */
|
|
opline = op_array->opcodes;
|
|
end = opline + op_array->last;
|
|
while (opline < end) {
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
|
|
if (opline->op1_type == IS_CONST) {
|
|
opline->op1.constant = opline->op1.literal - op_array->literals;
|
|
}
|
|
if (opline->op2_type == IS_CONST) {
|
|
opline->op2.constant = opline->op2.literal - op_array->literals;
|
|
}
|
|
#endif
|
|
switch (opline->opcode) {
|
|
case ZEND_JMP:
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_2_X_API_NO
|
|
case ZEND_GOTO:
|
|
#endif
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_4_X_API_NO
|
|
case ZEND_FAST_CALL:
|
|
#endif
|
|
ZEND_OP1(opline).opline_num = ZEND_OP1(opline).jmp_addr - op_array->opcodes;
|
|
break;
|
|
case ZEND_JMPZ:
|
|
case ZEND_JMPNZ:
|
|
case ZEND_JMPZ_EX:
|
|
case ZEND_JMPNZ_EX:
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_2_X_API_NO
|
|
case ZEND_JMP_SET:
|
|
#endif
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
|
|
case ZEND_JMP_SET_VAR:
|
|
#endif
|
|
ZEND_OP2(opline).opline_num = ZEND_OP2(opline).jmp_addr - op_array->opcodes;
|
|
break;
|
|
}
|
|
opline++;
|
|
}
|
|
|
|
/* Do actual optimizations */
|
|
zend_optimize(op_array, script, constants TSRMLS_CC);
|
|
|
|
/* Redo pass_two() */
|
|
opline = op_array->opcodes;
|
|
end = opline + op_array->last;
|
|
while (opline < end) {
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
|
|
if (opline->op1_type == IS_CONST) {
|
|
opline->op1.zv = &op_array->literals[opline->op1.constant].constant;
|
|
}
|
|
if (opline->op2_type == IS_CONST) {
|
|
opline->op2.zv = &op_array->literals[opline->op2.constant].constant;
|
|
}
|
|
#endif
|
|
switch (opline->opcode) {
|
|
case ZEND_JMP:
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_2_X_API_NO
|
|
case ZEND_GOTO:
|
|
#endif
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_4_X_API_NO
|
|
case ZEND_FAST_CALL:
|
|
#endif
|
|
ZEND_OP1(opline).jmp_addr = &op_array->opcodes[ZEND_OP1(opline).opline_num];
|
|
break;
|
|
case ZEND_JMPZ:
|
|
case ZEND_JMPNZ:
|
|
case ZEND_JMPZ_EX:
|
|
case ZEND_JMPNZ_EX:
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_2_X_API_NO
|
|
case ZEND_JMP_SET:
|
|
#endif
|
|
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
|
|
case ZEND_JMP_SET_VAR:
|
|
#endif
|
|
ZEND_OP2(opline).jmp_addr = &op_array->opcodes[ZEND_OP2(opline).opline_num];
|
|
break;
|
|
}
|
|
ZEND_VM_SET_OPCODE_HANDLER(opline);
|
|
opline++;
|
|
}
|
|
}
|
|
|
|
int zend_accel_script_optimize(zend_persistent_script *script TSRMLS_DC)
|
|
{
|
|
uint idx, j;
|
|
Bucket *p, *q;
|
|
HashTable *constants = NULL;
|
|
zend_class_entry *ce;
|
|
zend_op_array *op_array;
|
|
|
|
zend_accel_optimize(&script->main_op_array, script, &constants TSRMLS_CC);
|
|
|
|
for (idx = 0; idx < script->function_table.nNumUsed; idx++) {
|
|
p = script->function_table.arData + idx;
|
|
if (Z_TYPE(p->val) == IS_UNDEF) continue;
|
|
op_array = (zend_op_array*)Z_PTR(p->val);
|
|
zend_accel_optimize(op_array, script, &constants TSRMLS_CC);
|
|
}
|
|
|
|
for (idx = 0; idx < script->class_table.nNumUsed; idx++) {
|
|
p = script->class_table.arData + idx;
|
|
if (Z_TYPE(p->val) == IS_UNDEF) continue;
|
|
ce = (zend_class_entry*)Z_PTR(p->val);
|
|
for (j = 0; j < ce->function_table.nNumUsed; j++) {
|
|
q = ce->function_table.arData + j;
|
|
if (Z_TYPE(q->val) == IS_UNDEF) continue;
|
|
op_array = (zend_op_array*)Z_PTR(q->val);
|
|
if (op_array->scope == ce) {
|
|
zend_accel_optimize(op_array, script, &constants TSRMLS_CC);
|
|
} else if (op_array->type == ZEND_USER_FUNCTION) {
|
|
zend_op_array *orig_op_array;
|
|
if ((orig_op_array = zend_hash_find_ptr(&op_array->scope->function_table, q->key)) != NULL) {
|
|
HashTable *ht = op_array->static_variables;
|
|
*op_array = *orig_op_array;
|
|
op_array->static_variables = ht;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (constants) {
|
|
zend_hash_destroy(constants);
|
|
efree(constants);
|
|
}
|
|
|
|
return 1;
|
|
}
|