diff options
Diffstat (limited to 'ext/opcache/Optimizer/zend_optimizer.c')
| -rw-r--r-- | ext/opcache/Optimizer/zend_optimizer.c | 1568 |
1 files changed, 0 insertions, 1568 deletions
diff --git a/ext/opcache/Optimizer/zend_optimizer.c b/ext/opcache/Optimizer/zend_optimizer.c deleted file mode 100644 index 00c579491a..0000000000 --- a/ext/opcache/Optimizer/zend_optimizer.c +++ /dev/null @@ -1,1568 +0,0 @@ -/* - +----------------------------------------------------------------------+ - | 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: | - | 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. | - +----------------------------------------------------------------------+ - | Authors: Andi Gutmans <andi@php.net> | - | Zeev Suraski <zeev@php.net> | - | Stanislav Malyshev <stas@zend.com> | - | Dmitry Stogov <dmitry@php.net> | - +----------------------------------------------------------------------+ -*/ - -#include "php.h" -#include "Optimizer/zend_optimizer.h" -#include "Optimizer/zend_optimizer_internal.h" -#include "zend_API.h" -#include "zend_constants.h" -#include "zend_execute.h" -#include "zend_vm.h" -#include "zend_cfg.h" -#include "zend_func_info.h" -#include "zend_call_graph.h" -#include "zend_inference.h" -#include "zend_dump.h" - -static void zend_optimizer_zval_dtor_wrapper(zval *zvalue) -{ - zval_ptr_dtor_nogc(zvalue); -} - -void zend_optimizer_collect_constant(zend_optimizer_ctx *ctx, zval *name, zval* value) -{ - zval val; - - if (!ctx->constants) { - ctx->constants = zend_arena_alloc(&ctx->arena, sizeof(HashTable)); - zend_hash_init(ctx->constants, 16, NULL, zend_optimizer_zval_dtor_wrapper, 0); - } - ZVAL_COPY(&val, value); - zend_hash_add(ctx->constants, Z_STR_P(name), &val); -} - -int zend_optimizer_eval_binary_op(zval *result, zend_uchar opcode, zval *op1, zval *op2) /* {{{ */ -{ - binary_op_type binary_op = get_binary_op(opcode); - int er, ret; - - if (zend_binary_op_produces_error(opcode, op1, op2)) { - return FAILURE; - } - - er = EG(error_reporting); - EG(error_reporting) = 0; - ret = binary_op(result, op1, op2); - EG(error_reporting) = er; - - return ret; -} -/* }}} */ - -int zend_optimizer_eval_unary_op(zval *result, zend_uchar opcode, zval *op1) /* {{{ */ -{ - unary_op_type unary_op = get_unary_op(opcode); - - if (unary_op) { - if (opcode == ZEND_BW_NOT - && Z_TYPE_P(op1) != IS_LONG - && Z_TYPE_P(op1) != IS_DOUBLE - && Z_TYPE_P(op1) != IS_STRING) { - /* produces "Unsupported operand types" exception */ - return FAILURE; - } - return unary_op(result, op1); - } else { /* ZEND_BOOL */ - ZVAL_BOOL(result, zend_is_true(op1)); - return SUCCESS; - } -} -/* }}} */ - -int zend_optimizer_eval_cast(zval *result, uint32_t type, zval *op1) /* {{{ */ -{ - switch (type) { - case IS_NULL: - ZVAL_NULL(result); - return SUCCESS; - case _IS_BOOL: - ZVAL_BOOL(result, zval_is_true(op1)); - return SUCCESS; - case IS_LONG: - ZVAL_LONG(result, zval_get_long(op1)); - return SUCCESS; - case IS_DOUBLE: - ZVAL_DOUBLE(result, zval_get_double(op1)); - return SUCCESS; - case IS_STRING: - /* Conversion from double to string takes into account run-time - 'precision' setting and cannot be evaluated at compile-time */ - if (Z_TYPE_P(op1) != IS_ARRAY && Z_TYPE_P(op1) != IS_DOUBLE) { - ZVAL_STR(result, zval_get_string(op1)); - return SUCCESS; - } - break; - case IS_ARRAY: - ZVAL_COPY(result, op1); - convert_to_array(result); - return SUCCESS; - } - return FAILURE; -} -/* }}} */ - -int zend_optimizer_eval_strlen(zval *result, zval *op1) /* {{{ */ -{ - if (Z_TYPE_P(op1) != IS_STRING) { - return FAILURE; - } - ZVAL_LONG(result, Z_STRLEN_P(op1)); - return SUCCESS; -} -/* }}} */ - -int zend_optimizer_get_collected_constant(HashTable *constants, zval *name, zval* value) -{ - zval *val; - - if ((val = zend_hash_find(constants, Z_STR_P(name))) != NULL) { - ZVAL_COPY(value, val); - return 1; - } - return 0; -} - -int zend_optimizer_add_literal(zend_op_array *op_array, zval *zv) -{ - int i = op_array->last_literal; - op_array->last_literal++; - op_array->literals = (zval*)erealloc(op_array->literals, op_array->last_literal * sizeof(zval)); - ZVAL_COPY_VALUE(&op_array->literals[i], zv); - Z_EXTRA(op_array->literals[i]) = 0; - return i; -} - -static inline int zend_optimizer_add_literal_string(zend_op_array *op_array, zend_string *str) { - zval zv; - ZVAL_STR(&zv, str); - zend_string_hash_val(str); - return zend_optimizer_add_literal(op_array, &zv); -} - -static inline void drop_leading_backslash(zval *val) { - if (Z_STRVAL_P(val)[0] == '\\') { - zend_string *str = zend_string_init(Z_STRVAL_P(val) + 1, Z_STRLEN_P(val) - 1, 0); - zval_ptr_dtor_nogc(val); - ZVAL_STR(val, str); - } -} - -static inline uint32_t alloc_cache_slots(zend_op_array *op_array, uint32_t num) { - uint32_t ret = op_array->cache_size; - op_array->cache_size += num * sizeof(void *); - return ret; -} - -#define REQUIRES_STRING(val) do { \ - if (Z_TYPE_P(val) != IS_STRING) { \ - return 0; \ - } \ -} while (0) - -#define TO_STRING_NOWARN(val) do { \ - if (Z_TYPE_P(val) >= IS_ARRAY) { \ - return 0; \ - } \ - convert_to_string(val); \ -} while (0) - -int zend_optimizer_update_op1_const(zend_op_array *op_array, - zend_op *opline, - zval *val) -{ - switch (opline->opcode) { - case ZEND_OP_DATA: - switch ((opline-1)->opcode) { - case ZEND_ASSIGN_OBJ_REF: - case ZEND_ASSIGN_STATIC_PROP_REF: - return 0; - } - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - break; - case ZEND_FREE: - case ZEND_CHECK_VAR: - MAKE_NOP(opline); - zval_ptr_dtor_nogc(val); - return 1; - case ZEND_SEND_VAR_EX: - case ZEND_SEND_FUNC_ARG: - case ZEND_FETCH_DIM_W: - case ZEND_FETCH_DIM_RW: - case ZEND_FETCH_DIM_FUNC_ARG: - case ZEND_FETCH_DIM_UNSET: - case ZEND_FETCH_LIST_W: - case ZEND_ASSIGN_DIM: - case ZEND_RETURN_BY_REF: - case ZEND_INSTANCEOF: - case ZEND_MAKE_REF: - return 0; - case ZEND_CATCH: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - opline->extended_value = alloc_cache_slots(op_array, 1) | (opline->extended_value & ZEND_LAST_CATCH); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - break; - case ZEND_DEFINED: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - opline->extended_value = alloc_cache_slots(op_array, 1); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - break; - case ZEND_NEW: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - opline->op2.num = alloc_cache_slots(op_array, 1); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - break; - case ZEND_INIT_STATIC_METHOD_CALL: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - if (opline->op2_type != IS_CONST) { - opline->result.num = alloc_cache_slots(op_array, 1); - } - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - break; - case ZEND_FETCH_CLASS_CONSTANT: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - if (opline->op2_type != IS_CONST) { - opline->extended_value = alloc_cache_slots(op_array, 1); - } - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - break; - case ZEND_ASSIGN_OP: - case ZEND_ASSIGN_DIM_OP: - case ZEND_ASSIGN_OBJ_OP: - break; - case ZEND_ASSIGN_STATIC_PROP_OP: - case ZEND_ASSIGN_STATIC_PROP: - case ZEND_ASSIGN_STATIC_PROP_REF: - case ZEND_FETCH_STATIC_PROP_R: - case ZEND_FETCH_STATIC_PROP_W: - case ZEND_FETCH_STATIC_PROP_RW: - case ZEND_FETCH_STATIC_PROP_IS: - case ZEND_FETCH_STATIC_PROP_UNSET: - case ZEND_FETCH_STATIC_PROP_FUNC_ARG: - case ZEND_UNSET_STATIC_PROP: - case ZEND_ISSET_ISEMPTY_STATIC_PROP: - case ZEND_PRE_INC_STATIC_PROP: - case ZEND_PRE_DEC_STATIC_PROP: - case ZEND_POST_INC_STATIC_PROP: - case ZEND_POST_DEC_STATIC_PROP: - TO_STRING_NOWARN(val); - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - if (opline->op2_type == IS_CONST && (opline->extended_value & ~ZEND_FETCH_OBJ_FLAGS) + sizeof(void*) == op_array->cache_size) { - op_array->cache_size += sizeof(void *); - } else { - opline->extended_value = alloc_cache_slots(op_array, 3) | (opline->extended_value & ZEND_FETCH_OBJ_FLAGS); - } - break; - case ZEND_SEND_VAR: - opline->opcode = ZEND_SEND_VAL; - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - break; - case ZEND_SEPARATE: - case ZEND_SEND_VAR_NO_REF: - case ZEND_SEND_VAR_NO_REF_EX: - return 0; - case ZEND_VERIFY_RETURN_TYPE: - /* This would require a non-local change. - * zend_optimizer_replace_by_const() supports this. */ - return 0; - case ZEND_CASE: - case ZEND_CASE_STRICT: - case ZEND_FETCH_LIST_R: - case ZEND_COPY_TMP: - case ZEND_FETCH_CLASS_NAME: - return 0; - case ZEND_ECHO: - { - zval zv; - if (Z_TYPE_P(val) != IS_STRING && zend_optimizer_eval_cast(&zv, IS_STRING, val) == SUCCESS) { - zval_ptr_dtor_nogc(val); - val = &zv; - } - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - if (Z_TYPE_P(val) == IS_STRING && Z_STRLEN_P(val) == 0) { - MAKE_NOP(opline); - } - /* TODO: In a subsequent pass, *after* this step and compacting nops, combine consecutive ZEND_ECHOs using the block information from ssa->cfg */ - /* (e.g. for ext/opcache/tests/opt/sccp_010.phpt) */ - break; - } - case ZEND_CONCAT: - case ZEND_FAST_CONCAT: - case ZEND_FETCH_R: - case ZEND_FETCH_W: - case ZEND_FETCH_RW: - case ZEND_FETCH_IS: - case ZEND_FETCH_UNSET: - case ZEND_FETCH_FUNC_ARG: - TO_STRING_NOWARN(val); - if (opline->opcode == ZEND_CONCAT && opline->op2_type == IS_CONST) { - opline->opcode = ZEND_FAST_CONCAT; - } - /* break missing intentionally */ - default: - opline->op1.constant = zend_optimizer_add_literal(op_array, val); - break; - } - - opline->op1_type = IS_CONST; - if (Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_STRING) { - zend_string_hash_val(Z_STR(ZEND_OP1_LITERAL(opline))); - } - return 1; -} - -int zend_optimizer_update_op2_const(zend_op_array *op_array, - zend_op *opline, - zval *val) -{ - zval tmp; - - switch (opline->opcode) { - case ZEND_ASSIGN_REF: - case ZEND_FAST_CALL: - return 0; - case ZEND_FETCH_CLASS: - if ((opline + 1)->opcode == ZEND_INSTANCEOF && - (opline + 1)->op2.var == opline->result.var) { - return 0; - } - /* break missing intentionally */ - case ZEND_INSTANCEOF: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - opline->extended_value = alloc_cache_slots(op_array, 1); - break; - case ZEND_INIT_FCALL_BY_NAME: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - opline->result.num = alloc_cache_slots(op_array, 1); - break; - case ZEND_ASSIGN_STATIC_PROP: - case ZEND_ASSIGN_STATIC_PROP_REF: - case ZEND_FETCH_STATIC_PROP_R: - case ZEND_FETCH_STATIC_PROP_W: - case ZEND_FETCH_STATIC_PROP_RW: - case ZEND_FETCH_STATIC_PROP_IS: - case ZEND_FETCH_STATIC_PROP_UNSET: - case ZEND_FETCH_STATIC_PROP_FUNC_ARG: - case ZEND_UNSET_STATIC_PROP: - case ZEND_ISSET_ISEMPTY_STATIC_PROP: - case ZEND_PRE_INC_STATIC_PROP: - case ZEND_PRE_DEC_STATIC_PROP: - case ZEND_POST_INC_STATIC_PROP: - case ZEND_POST_DEC_STATIC_PROP: - case ZEND_ASSIGN_STATIC_PROP_OP: - REQUIRES_STRING(val); - drop_leading_backslash(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - if (opline->op1_type != IS_CONST) { - opline->extended_value = alloc_cache_slots(op_array, 1) | (opline->extended_value & (ZEND_RETURNS_FUNCTION|ZEND_ISEMPTY|ZEND_FETCH_OBJ_FLAGS)); - } - break; - case ZEND_INIT_FCALL: - REQUIRES_STRING(val); - if (Z_REFCOUNT_P(val) == 1) { - zend_str_tolower(Z_STRVAL_P(val), Z_STRLEN_P(val)); - } else { - ZVAL_STR(&tmp, zend_string_tolower(Z_STR_P(val))); - zval_ptr_dtor_nogc(val); - val = &tmp; - } - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - opline->result.num = alloc_cache_slots(op_array, 1); - break; - case ZEND_INIT_DYNAMIC_CALL: - if (Z_TYPE_P(val) == IS_STRING) { - if (zend_memrchr(Z_STRVAL_P(val), ':', Z_STRLEN_P(val))) { - return 0; - } - - if (zend_optimizer_classify_function(Z_STR_P(val), opline->extended_value)) { - /* Dynamic call to various special functions must stay dynamic, - * otherwise would drop a warning */ - return 0; - } - - opline->opcode = ZEND_INIT_FCALL_BY_NAME; - drop_leading_backslash(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - opline->result.num = alloc_cache_slots(op_array, 1); - } else { - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - } - break; - case ZEND_INIT_METHOD_CALL: - REQUIRES_STRING(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - opline->result.num = alloc_cache_slots(op_array, 2); - break; - case ZEND_INIT_STATIC_METHOD_CALL: - REQUIRES_STRING(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - zend_optimizer_add_literal_string(op_array, zend_string_tolower(Z_STR_P(val))); - if (opline->op1_type != IS_CONST) { - opline->result.num = alloc_cache_slots(op_array, 2); - } - break; - case ZEND_ASSIGN_OBJ: - case ZEND_ASSIGN_OBJ_REF: - case ZEND_FETCH_OBJ_R: - case ZEND_FETCH_OBJ_W: - case ZEND_FETCH_OBJ_RW: - case ZEND_FETCH_OBJ_IS: - case ZEND_FETCH_OBJ_UNSET: - case ZEND_FETCH_OBJ_FUNC_ARG: - case ZEND_UNSET_OBJ: - case ZEND_PRE_INC_OBJ: - case ZEND_PRE_DEC_OBJ: - case ZEND_POST_INC_OBJ: - case ZEND_POST_DEC_OBJ: - case ZEND_ASSIGN_OBJ_OP: - TO_STRING_NOWARN(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - opline->extended_value = alloc_cache_slots(op_array, 3); - break; - case ZEND_ISSET_ISEMPTY_PROP_OBJ: - TO_STRING_NOWARN(val); - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - opline->extended_value = alloc_cache_slots(op_array, 3) | (opline->extended_value & ZEND_ISEMPTY); - break; - case ZEND_ASSIGN_DIM_OP: - case ZEND_ISSET_ISEMPTY_DIM_OBJ: - case ZEND_ASSIGN_DIM: - case ZEND_UNSET_DIM: - case ZEND_FETCH_DIM_R: - case ZEND_FETCH_DIM_W: - case ZEND_FETCH_DIM_RW: - case ZEND_FETCH_DIM_IS: - case ZEND_FETCH_DIM_FUNC_ARG: - case ZEND_FETCH_DIM_UNSET: - case ZEND_FETCH_LIST_R: - case ZEND_FETCH_LIST_W: - if (Z_TYPE_P(val) == IS_STRING) { - zend_ulong index; - - if (ZEND_HANDLE_NUMERIC(Z_STR_P(val), index)) { - ZVAL_LONG(&tmp, index); - opline->op2.constant = zend_optimizer_add_literal(op_array, &tmp); - zend_string_hash_val(Z_STR_P(val)); - zend_optimizer_add_literal(op_array, val); - Z_EXTRA(op_array->literals[opline->op2.constant]) = ZEND_EXTRA_VALUE; - break; - } - } - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - break; - case ZEND_ADD_ARRAY_ELEMENT: - case ZEND_INIT_ARRAY: - if (Z_TYPE_P(val) == IS_STRING) { - zend_ulong index; - if (ZEND_HANDLE_NUMERIC(Z_STR_P(val), index)) { - zval_ptr_dtor_nogc(val); - ZVAL_LONG(val, index); - } - } - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - break; - case ZEND_ROPE_INIT: - case ZEND_ROPE_ADD: - case ZEND_ROPE_END: - case ZEND_CONCAT: - case ZEND_FAST_CONCAT: - TO_STRING_NOWARN(val); - if (opline->opcode == ZEND_CONCAT && opline->op1_type == IS_CONST) { - opline->opcode = ZEND_FAST_CONCAT; - } - /* break missing intentionally */ - default: - opline->op2.constant = zend_optimizer_add_literal(op_array, val); - break; - } - - opline->op2_type = IS_CONST; - if (Z_TYPE(ZEND_OP2_LITERAL(opline)) == IS_STRING) { - zend_string_hash_val(Z_STR(ZEND_OP2_LITERAL(opline))); - } - return 1; -} - -int zend_optimizer_replace_by_const(zend_op_array *op_array, - zend_op *opline, - zend_uchar type, - uint32_t var, - zval *val) -{ - zend_op *end = op_array->opcodes + op_array->last; - - while (opline < end) { - if (opline->op1_type == type && - opline->op1.var == var) { - switch (opline->opcode) { - case ZEND_FETCH_DIM_W: - case ZEND_FETCH_DIM_RW: - case ZEND_FETCH_DIM_FUNC_ARG: - case ZEND_FETCH_DIM_UNSET: - case ZEND_FETCH_LIST_W: - case ZEND_ASSIGN_DIM: - case ZEND_SEPARATE: - case ZEND_RETURN_BY_REF: - return 0; - case ZEND_SEND_VAR: - opline->extended_value = 0; - opline->opcode = ZEND_SEND_VAL; - break; - case ZEND_SEND_VAR_EX: - case ZEND_SEND_FUNC_ARG: - opline->extended_value = 0; - opline->opcode = ZEND_SEND_VAL_EX; - break; - case ZEND_SEND_VAR_NO_REF: - return 0; - case ZEND_SEND_VAR_NO_REF_EX: - opline->opcode = ZEND_SEND_VAL; - break; - case ZEND_SEND_USER: - opline->opcode = ZEND_SEND_VAL_EX; - break; - /* In most cases IS_TMP_VAR operand may be used only once. - * The operands are usually destroyed by the opcode handler. - * ZEND_CASE[_STRICT] and ZEND_FETCH_LIST_R are exceptions, they keeps operand - * unchanged, and allows its reuse. these instructions - * usually terminated by ZEND_FREE that finally kills the value. - */ - case ZEND_FETCH_LIST_R: { - zend_op *m = opline; - - do { - if (m->opcode == ZEND_FETCH_LIST_R && - m->op1_type == type && - m->op1.var == var) { - zval v; - ZVAL_COPY(&v, val); - if (Z_TYPE(v) == IS_STRING) { - zend_string_hash_val(Z_STR(v)); - } - m->op1.constant = zend_optimizer_add_literal(op_array, &v); - m->op1_type = IS_CONST; - } - m++; - } while (m->opcode != ZEND_FREE || m->op1_type != type || m->op1.var != var); - - ZEND_ASSERT(m->opcode == ZEND_FREE && m->op1_type == type && m->op1.var == var); - MAKE_NOP(m); - zval_ptr_dtor_nogc(val); - return 1; - } - case ZEND_SWITCH_LONG: - case ZEND_SWITCH_STRING: - case ZEND_MATCH: - case ZEND_CASE: - case ZEND_CASE_STRICT: { - zend_op *end = op_array->opcodes + op_array->last; - while (opline < end) { - if (opline->op1_type == type && opline->op1.var == var) { - if ( - opline->opcode == ZEND_CASE - || opline->opcode == ZEND_CASE_STRICT - || opline->opcode == ZEND_SWITCH_LONG - || opline->opcode == ZEND_SWITCH_STRING - || opline->opcode == ZEND_MATCH - ) { - zval v; - - if (opline->opcode == ZEND_CASE) { - opline->opcode = ZEND_IS_EQUAL; - } else if (opline->opcode == ZEND_CASE_STRICT) { - opline->opcode = ZEND_IS_IDENTICAL; - } - ZVAL_COPY(&v, val); - if (Z_TYPE(v) == IS_STRING) { - zend_string_hash_val(Z_STR(v)); - } - opline->op1.constant = zend_optimizer_add_literal(op_array, &v); - opline->op1_type = IS_CONST; - } else if (opline->opcode == ZEND_FREE) { - if (opline->extended_value == ZEND_FREE_SWITCH) { - /* We found the end of the switch. */ - MAKE_NOP(opline); - break; - } - - ZEND_ASSERT(opline->extended_value == ZEND_FREE_ON_RETURN); - MAKE_NOP(opline); - } else { - ZEND_UNREACHABLE(); - } - } - opline++; - } - zval_ptr_dtor_nogc(val); - return 1; - } - case ZEND_VERIFY_RETURN_TYPE: { - zend_arg_info *ret_info = op_array->arg_info - 1; - if (!ZEND_TYPE_CONTAINS_CODE(ret_info->type, Z_TYPE_P(val)) - || (op_array->fn_flags & ZEND_ACC_RETURN_REFERENCE)) { - return 0; - } - MAKE_NOP(opline); - - /* zend_handle_loops_and_finally may inserts other oplines */ - do { - ++opline; - } while (opline->opcode != ZEND_RETURN && opline->opcode != ZEND_RETURN_BY_REF); - ZEND_ASSERT(opline->op1.var == var); - - break; - } - default: - break; - } - return zend_optimizer_update_op1_const(op_array, opline, val); - } - - if (opline->op2_type == type && - opline->op2.var == var) { - return zend_optimizer_update_op2_const(op_array, opline, val); - } - opline++; - } - - return 1; -} - -/* Update jump offsets after a jump was migrated to another opline */ -void zend_optimizer_migrate_jump(zend_op_array *op_array, zend_op *new_opline, zend_op *opline) { - switch (new_opline->opcode) { - case ZEND_JMP: - case ZEND_FAST_CALL: - ZEND_SET_OP_JMP_ADDR(new_opline, new_opline->op1, ZEND_OP1_JMP_ADDR(opline)); - break; - case ZEND_JMPZNZ: - new_opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)); - /* break missing intentionally */ - case ZEND_JMPZ: - case ZEND_JMPNZ: - case ZEND_JMPZ_EX: - case ZEND_JMPNZ_EX: - case ZEND_FE_RESET_R: - case ZEND_FE_RESET_RW: - case ZEND_JMP_SET: - case ZEND_COALESCE: - case ZEND_ASSERT_CHECK: - case ZEND_JMP_NULL: - ZEND_SET_OP_JMP_ADDR(new_opline, new_opline->op2, ZEND_OP2_JMP_ADDR(opline)); - break; - case ZEND_FE_FETCH_R: - case ZEND_FE_FETCH_RW: - new_opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)); - break; - case ZEND_CATCH: - if (!(opline->extended_value & ZEND_LAST_CATCH)) { - ZEND_SET_OP_JMP_ADDR(new_opline, new_opline->op2, ZEND_OP2_JMP_ADDR(opline)); - } - break; - case ZEND_SWITCH_LONG: - case ZEND_SWITCH_STRING: - case ZEND_MATCH: - { - HashTable *jumptable = Z_ARRVAL(ZEND_OP2_LITERAL(opline)); - zval *zv; - ZEND_HASH_FOREACH_VAL(jumptable, zv) { - Z_LVAL_P(zv) = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, Z_LVAL_P(zv))); - } ZEND_HASH_FOREACH_END(); - new_opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, new_opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)); - break; - } - } -} - -/* Shift jump offsets based on shiftlist */ -void zend_optimizer_shift_jump(zend_op_array *op_array, zend_op *opline, uint32_t *shiftlist) { - switch (opline->opcode) { - case ZEND_JMP: - case ZEND_FAST_CALL: - ZEND_SET_OP_JMP_ADDR(opline, opline->op1, ZEND_OP1_JMP_ADDR(opline) - shiftlist[ZEND_OP1_JMP_ADDR(opline) - op_array->opcodes]); - break; - case ZEND_JMPZNZ: - opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)]); - /* break missing intentionally */ - case ZEND_JMPZ: - case ZEND_JMPNZ: - case ZEND_JMPZ_EX: - case ZEND_JMPNZ_EX: - case ZEND_FE_RESET_R: - case ZEND_FE_RESET_RW: - case ZEND_JMP_SET: - case ZEND_COALESCE: - case ZEND_ASSERT_CHECK: - case ZEND_JMP_NULL: - ZEND_SET_OP_JMP_ADDR(opline, opline->op2, ZEND_OP2_JMP_ADDR(opline) - shiftlist[ZEND_OP2_JMP_ADDR(opline) - op_array->opcodes]); - break; - case ZEND_CATCH: - if (!(opline->extended_value & ZEND_LAST_CATCH)) { - ZEND_SET_OP_JMP_ADDR(opline, opline->op2, ZEND_OP2_JMP_ADDR(opline) - shiftlist[ZEND_OP2_JMP_ADDR(opline) - op_array->opcodes]); - } - break; - case ZEND_FE_FETCH_R: - case ZEND_FE_FETCH_RW: - opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)]); - break; - case ZEND_SWITCH_LONG: - case ZEND_SWITCH_STRING: - case ZEND_MATCH: - { - HashTable *jumptable = Z_ARRVAL(ZEND_OP2_LITERAL(opline)); - zval *zv; - ZEND_HASH_FOREACH_VAL(jumptable, zv) { - Z_LVAL_P(zv) = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, Z_LVAL_P(zv)) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, Z_LVAL_P(zv))]); - } ZEND_HASH_FOREACH_END(); - opline->extended_value = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value) - shiftlist[ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, opline->extended_value)]); - break; - } - } -} - -static zend_class_entry *get_class_entry_from_op1( - zend_script *script, zend_op_array *op_array, zend_op *opline) { - if (opline->op1_type == IS_CONST) { - zval *op1 = CRT_CONSTANT(opline->op1); - if (Z_TYPE_P(op1) == IS_STRING) { - zend_string *class_name = Z_STR_P(op1 + 1); - zend_class_entry *ce; - if (script && (ce = zend_hash_find_ptr(&script->class_table, class_name))) { - return ce; - } else if ((ce = zend_hash_find_ptr(EG(class_table), class_name))) { - if (ce->type == ZEND_INTERNAL_CLASS) { - return ce; - } else if (ce->type == ZEND_USER_CLASS && - ce->info.user.filename && - ce->info.user.filename == op_array->filename) { - return ce; - } - } - } - } else if (opline->op1_type == IS_UNUSED && op_array->scope - && !(op_array->scope->ce_flags & ZEND_ACC_TRAIT) - && (opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF) { - return op_array->scope; - } - return NULL; -} - -zend_function *zend_optimizer_get_called_func( - zend_script *script, zend_op_array *op_array, zend_op *opline, bool *is_prototype) -{ - *is_prototype = 0; - switch (opline->opcode) { - case ZEND_INIT_FCALL: - { - zend_string *function_name = Z_STR_P(CRT_CONSTANT(opline->op2)); - zend_function *func; - if (script && (func = zend_hash_find_ptr(&script->function_table, function_name)) != NULL) { - return func; - } else if ((func = zend_hash_find_ptr(EG(function_table), function_name)) != NULL) { - if (func->type == ZEND_INTERNAL_FUNCTION) { - return func; - } else if (func->type == ZEND_USER_FUNCTION && - func->op_array.filename && - func->op_array.filename == op_array->filename) { - return func; - } - } - break; - } - case ZEND_INIT_FCALL_BY_NAME: - case ZEND_INIT_NS_FCALL_BY_NAME: - if (opline->op2_type == IS_CONST && Z_TYPE_P(CRT_CONSTANT(opline->op2)) == IS_STRING) { - zval *function_name = CRT_CONSTANT(opline->op2) + 1; - zend_function *func; - if (script && (func = zend_hash_find_ptr(&script->function_table, Z_STR_P(function_name)))) { - return func; - } else if ((func = zend_hash_find_ptr(EG(function_table), Z_STR_P(function_name))) != NULL) { - if (func->type == ZEND_INTERNAL_FUNCTION) { - return func; - } else if (func->type == ZEND_USER_FUNCTION && - func->op_array.filename && - func->op_array.filename == op_array->filename) { - return func; - } - } - } - break; - case ZEND_INIT_STATIC_METHOD_CALL: - if (opline->op2_type == IS_CONST && Z_TYPE_P(CRT_CONSTANT(opline->op2)) == IS_STRING) { - zend_class_entry *ce = get_class_entry_from_op1( - script, op_array, opline); - if (ce) { - zend_string *func_name = Z_STR_P(CRT_CONSTANT(opline->op2) + 1); - zend_function *fbc = zend_hash_find_ptr(&ce->function_table, func_name); - if (fbc) { - bool is_public = (fbc->common.fn_flags & ZEND_ACC_PUBLIC) != 0; - bool same_scope = fbc->common.scope == op_array->scope; - if (is_public || same_scope) { - return fbc; - } - } - } - } - break; - case ZEND_INIT_METHOD_CALL: - if (opline->op1_type == IS_UNUSED - && opline->op2_type == IS_CONST && Z_TYPE_P(CRT_CONSTANT(opline->op2)) == IS_STRING - && op_array->scope - && !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE) - && !(op_array->scope->ce_flags & ZEND_ACC_TRAIT)) { - zend_string *method_name = Z_STR_P(CRT_CONSTANT(opline->op2) + 1); - zend_function *fbc = zend_hash_find_ptr( - &op_array->scope->function_table, method_name); - if (fbc) { - bool is_private = (fbc->common.fn_flags & ZEND_ACC_PRIVATE) != 0; - bool is_final = (fbc->common.fn_flags & ZEND_ACC_FINAL) != 0; - bool same_scope = fbc->common.scope == op_array->scope; - if (is_private) { - /* Only use private method if in the same scope. We can't even use it - * as a prototype, as it may be overridden with changed signature. */ - return same_scope ? fbc : NULL; - } - /* If the method is non-final, it may be overridden, - * but only with a compatible method signature. */ - *is_prototype = !is_final; - return fbc; - } - } - break; - case ZEND_NEW: - { - zend_class_entry *ce = get_class_entry_from_op1( - script, op_array, opline); - if (ce && ce->type == ZEND_USER_CLASS) { - return ce->constructor; - } - break; - } - } - return NULL; -} - -uint32_t zend_optimizer_classify_function(zend_string *name, uint32_t num_args) { - if (zend_string_equals_literal(name, "extract")) { - return ZEND_FUNC_INDIRECT_VAR_ACCESS; - } else if (zend_string_equals_literal(name, "compact")) { - return ZEND_FUNC_INDIRECT_VAR_ACCESS; - } else if (zend_string_equals_literal(name, "get_defined_vars")) { - return ZEND_FUNC_INDIRECT_VAR_ACCESS; - } else if (zend_string_equals_literal(name, "db2_execute")) { - return ZEND_FUNC_INDIRECT_VAR_ACCESS; - } else if (zend_string_equals_literal(name, "func_num_args")) { - return ZEND_FUNC_VARARG; - } else if (zend_string_equals_literal(name, "func_get_arg")) { - return ZEND_FUNC_VARARG; - } else if (zend_string_equals_literal(name, "func_get_args")) { - return ZEND_FUNC_VARARG; - } else { - return 0; - } -} - -zend_op *zend_optimizer_get_loop_var_def(const zend_op_array *op_array, zend_op *free_opline) { - uint32_t var = free_opline->op1.var; - ZEND_ASSERT(zend_optimizer_is_loop_var_free(free_opline)); - - while (--free_opline >= op_array->opcodes) { - if ((free_opline->result_type & (IS_TMP_VAR|IS_VAR)) && free_opline->result.var == var) { - return free_opline; - } - } - return NULL; -} - -static void zend_optimize(zend_op_array *op_array, - zend_optimizer_ctx *ctx) -{ - if (op_array->type == ZEND_EVAL_CODE) { - return; - } - - if (ctx->debug_level & ZEND_DUMP_BEFORE_OPTIMIZER) { - zend_dump_op_array(op_array, ZEND_DUMP_LIVE_RANGES, "before optimizer", NULL); - } - - /* pass 1 (Simple local optimizations) - * - persistent constant substitution (true, false, null, etc) - * - constant casting (ADD expects numbers, CONCAT strings, etc) - * - constant expression evaluation - * - optimize constant conditional JMPs - * - pre-evaluate constant function calls - * - eliminate FETCH $GLOBALS followed by FETCH_DIM/UNSET_DIM/ISSET_ISEMPTY_DIM - */ - if (ZEND_OPTIMIZER_PASS_1 & ctx->optimization_level) { - zend_optimizer_pass1(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_1) { - zend_dump_op_array(op_array, 0, "after pass 1", NULL); - } - } - - /* pass 3: (Jump optimization) - * - optimize series of JMPs - */ - if (ZEND_OPTIMIZER_PASS_3 & ctx->optimization_level) { - zend_optimizer_pass3(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_3) { - zend_dump_op_array(op_array, 0, "after pass 3", NULL); - } - } - - /* pass 4: - * - INIT_FCALL_BY_NAME -> DO_FCALL - */ - if (ZEND_OPTIMIZER_PASS_4 & ctx->optimization_level) { - zend_optimize_func_calls(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_4) { - zend_dump_op_array(op_array, 0, "after pass 4", NULL); - } - } - - /* pass 5: - * - CFG optimization - */ - if (ZEND_OPTIMIZER_PASS_5 & ctx->optimization_level) { - zend_optimize_cfg(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_5) { - zend_dump_op_array(op_array, 0, "after pass 5", NULL); - } - } - - /* pass 6: - * - DFA optimization - */ - if ((ZEND_OPTIMIZER_PASS_6 & ctx->optimization_level) && - !(ZEND_OPTIMIZER_PASS_7 & ctx->optimization_level)) { - zend_optimize_dfa(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_6) { - zend_dump_op_array(op_array, 0, "after pass 6", NULL); - } - } - - /* pass 9: - * - Optimize temp variables usage - */ - if (ZEND_OPTIMIZER_PASS_9 & ctx->optimization_level) { - zend_optimize_temporary_variables(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_9) { - zend_dump_op_array(op_array, 0, "after pass 9", NULL); - } - } - - /* pass 10: - * - remove NOPs - */ - if (((ZEND_OPTIMIZER_PASS_10|ZEND_OPTIMIZER_PASS_5) & ctx->optimization_level) == ZEND_OPTIMIZER_PASS_10) { - zend_optimizer_nop_removal(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_10) { - zend_dump_op_array(op_array, 0, "after pass 10", NULL); - } - } - - /* pass 11: - * - Compact literals table - */ - if ((ZEND_OPTIMIZER_PASS_11 & ctx->optimization_level) && - (!(ZEND_OPTIMIZER_PASS_6 & ctx->optimization_level) || - !(ZEND_OPTIMIZER_PASS_7 & ctx->optimization_level))) { - zend_optimizer_compact_literals(op_array, ctx); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_11) { - zend_dump_op_array(op_array, 0, "after pass 11", NULL); - } - } - - if ((ZEND_OPTIMIZER_PASS_13 & ctx->optimization_level) && - (!(ZEND_OPTIMIZER_PASS_6 & ctx->optimization_level) || - !(ZEND_OPTIMIZER_PASS_7 & ctx->optimization_level))) { - zend_optimizer_compact_vars(op_array); - if (ctx->debug_level & ZEND_DUMP_AFTER_PASS_13) { - zend_dump_op_array(op_array, 0, "after pass 13", NULL); - } - } - - if (ZEND_OPTIMIZER_PASS_7 & ctx->optimization_level) { - return; - } - - if (ctx->debug_level & ZEND_DUMP_AFTER_OPTIMIZER) { - zend_dump_op_array(op_array, 0, "after optimizer", NULL); - } -} - -static void zend_revert_pass_two(zend_op_array *op_array) -{ - zend_op *opline, *end; - - ZEND_ASSERT((op_array->fn_flags & ZEND_ACC_DONE_PASS_TWO) != 0); - - opline = op_array->opcodes; - end = opline + op_array->last; - while (opline < end) { - if (opline->op1_type == IS_CONST) { - ZEND_PASS_TWO_UNDO_CONSTANT(op_array, opline, opline->op1); - } - if (opline->op2_type == IS_CONST) { - ZEND_PASS_TWO_UNDO_CONSTANT(op_array, opline, opline->op2); - } - /* reset smart branch flags IS_SMART_BRANCH_JMP[N]Z */ - opline->result_type &= (IS_TMP_VAR|IS_VAR|IS_CV|IS_CONST); - opline++; - } -#if !ZEND_USE_ABS_CONST_ADDR - if (op_array->literals) { - zval *literals = emalloc(sizeof(zval) * op_array->last_literal); - memcpy(literals, op_array->literals, sizeof(zval) * op_array->last_literal); - op_array->literals = literals; - } -#endif - - op_array->fn_flags &= ~ZEND_ACC_DONE_PASS_TWO; -} - -static void zend_redo_pass_two(zend_op_array *op_array) -{ - zend_op *opline, *end; -#if ZEND_USE_ABS_JMP_ADDR && !ZEND_USE_ABS_CONST_ADDR - zend_op *old_opcodes = op_array->opcodes; -#endif - - ZEND_ASSERT((op_array->fn_flags & ZEND_ACC_DONE_PASS_TWO) == 0); - -#if !ZEND_USE_ABS_CONST_ADDR - if (op_array->last_literal) { - op_array->opcodes = (zend_op *) erealloc(op_array->opcodes, - ZEND_MM_ALIGNED_SIZE_EX(sizeof(zend_op) * op_array->last, 16) + - sizeof(zval) * op_array->last_literal); - memcpy(((char*)op_array->opcodes) + ZEND_MM_ALIGNED_SIZE_EX(sizeof(zend_op) * op_array->last, 16), - op_array->literals, sizeof(zval) * op_array->last_literal); - efree(op_array->literals); - op_array->literals = (zval*)(((char*)op_array->opcodes) + ZEND_MM_ALIGNED_SIZE_EX(sizeof(zend_op) * op_array->last, 16)); - } else { - if (op_array->literals) { - efree(op_array->literals); - } - op_array->literals = NULL; - } -#endif - - opline = op_array->opcodes; - end = opline + op_array->last; - while (opline < end) { - if (opline->op1_type == IS_CONST) { - ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, opline->op1); - } - if (opline->op2_type == IS_CONST) { - ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, opline->op2); - } - /* fix jumps to point to new array */ - switch (opline->opcode) { -#if ZEND_USE_ABS_JMP_ADDR && !ZEND_USE_ABS_CONST_ADDR - case ZEND_JMP: - case ZEND_FAST_CALL: - opline->op1.jmp_addr = &op_array->opcodes[opline->op1.jmp_addr - old_opcodes]; - break; - case ZEND_JMPZNZ: - /* relative extended_value don't have to be changed */ - /* break omitted intentionally */ - case ZEND_JMPZ: - case ZEND_JMPNZ: - case ZEND_JMPZ_EX: - case ZEND_JMPNZ_EX: - case ZEND_JMP_SET: - case ZEND_COALESCE: - case ZEND_FE_RESET_R: - case ZEND_FE_RESET_RW: - case ZEND_ASSERT_CHECK: - case ZEND_JMP_NULL: - opline->op2.jmp_addr = &op_array->opcodes[opline->op2.jmp_addr - old_opcodes]; - break; - case ZEND_CATCH: - if (!(opline->extended_value & ZEND_LAST_CATCH)) { - opline->op2.jmp_addr = &op_array->opcodes[opline->op2.jmp_addr - old_opcodes]; - } - break; - case ZEND_FE_FETCH_R: - case ZEND_FE_FETCH_RW: - case ZEND_SWITCH_LONG: - case ZEND_SWITCH_STRING: - case ZEND_MATCH: - /* relative extended_value don't have to be changed */ - break; -#endif - case ZEND_IS_IDENTICAL: - case ZEND_IS_NOT_IDENTICAL: - case ZEND_IS_EQUAL: - case ZEND_IS_NOT_EQUAL: - case ZEND_IS_SMALLER: - case ZEND_IS_SMALLER_OR_EQUAL: - case ZEND_CASE: - case ZEND_CASE_STRICT: - case ZEND_ISSET_ISEMPTY_CV: - case ZEND_ISSET_ISEMPTY_VAR: - case ZEND_ISSET_ISEMPTY_DIM_OBJ: - case ZEND_ISSET_ISEMPTY_PROP_OBJ: - case ZEND_ISSET_ISEMPTY_STATIC_PROP: - case ZEND_INSTANCEOF: - case ZEND_TYPE_CHECK: - case ZEND_DEFINED: - case ZEND_IN_ARRAY: - case ZEND_ARRAY_KEY_EXISTS: - if (opline->result_type & IS_TMP_VAR) { - /* reinitialize result_type of smart branch instructions */ - if (opline + 1 < end) { - if ((opline+1)->opcode == ZEND_JMPZ - && (opline+1)->op1_type == IS_TMP_VAR - && (opline+1)->op1.var == opline->result.var) { - opline->result_type = IS_SMART_BRANCH_JMPZ | IS_TMP_VAR; - } else if ((opline+1)->opcode == ZEND_JMPNZ - && (opline+1)->op1_type == IS_TMP_VAR - && (opline+1)->op1.var == opline->result.var) { - opline->result_type = IS_SMART_BRANCH_JMPNZ | IS_TMP_VAR; - } - } - } - break; - } - ZEND_VM_SET_OPCODE_HANDLER(opline); - opline++; - } - - op_array->fn_flags |= ZEND_ACC_DONE_PASS_TWO; -} - -static void zend_redo_pass_two_ex(zend_op_array *op_array, zend_ssa *ssa) -{ - zend_op *opline, *end; -#if ZEND_USE_ABS_JMP_ADDR && !ZEND_USE_ABS_CONST_ADDR - zend_op *old_opcodes = op_array->opcodes; -#endif - - ZEND_ASSERT((op_array->fn_flags & ZEND_ACC_DONE_PASS_TWO) == 0); - -#if !ZEND_USE_ABS_CONST_ADDR - if (op_array->last_literal) { - op_array->opcodes = (zend_op *) erealloc(op_array->opcodes, - ZEND_MM_ALIGNED_SIZE_EX(sizeof(zend_op) * op_array->last, 16) + - sizeof(zval) * op_array->last_literal); - memcpy(((char*)op_array->opcodes) + ZEND_MM_ALIGNED_SIZE_EX(sizeof(zend_op) * op_array->last, 16), - op_array->literals, sizeof(zval) * op_array->last_literal); - efree(op_array->literals); - op_array->literals = (zval*)(((char*)op_array->opcodes) + ZEND_MM_ALIGNED_SIZE_EX(sizeof(zend_op) * op_array->last, 16)); - } else { - if (op_array->literals) { - efree(op_array->literals); - } - op_array->literals = NULL; - } -#endif - - opline = op_array->opcodes; - end = opline + op_array->last; - while (opline < end) { - zend_ssa_op *ssa_op = &ssa->ops[opline - op_array->opcodes]; - uint32_t op1_info = opline->op1_type == IS_UNUSED ? 0 : (OP1_INFO() & (MAY_BE_UNDEF|MAY_BE_ANY|MAY_BE_REF|MAY_BE_ARRAY_OF_ANY|MAY_BE_ARRAY_KEY_ANY)); - uint32_t op2_info = opline->op1_type == IS_UNUSED ? 0 : (OP2_INFO() & (MAY_BE_UNDEF|MAY_BE_ANY|MAY_BE_REF|MAY_BE_ARRAY_OF_ANY|MAY_BE_ARRAY_KEY_ANY)); - uint32_t res_info = - (opline->opcode == ZEND_PRE_INC || - opline->opcode == ZEND_PRE_DEC || - opline->opcode == ZEND_POST_INC || - opline->opcode == ZEND_POST_DEC) ? - ((ssa->ops[opline - op_array->opcodes].op1_def >= 0) ? (OP1_DEF_INFO() & (MAY_BE_UNDEF|MAY_BE_ANY|MAY_BE_REF|MAY_BE_ARRAY_OF_ANY|MAY_BE_ARRAY_KEY_ANY)) : MAY_BE_ANY) : - (opline->result_type == IS_UNUSED ? 0 : (RES_INFO() & (MAY_BE_UNDEF|MAY_BE_ANY|MAY_BE_REF|MAY_BE_ARRAY_OF_ANY|MAY_BE_ARRAY_KEY_ANY))); - - if (opline->op1_type == IS_CONST) { - ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, opline->op1); - } - if (opline->op2_type == IS_CONST) { - ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, opline->op2); - } - - /* fix jumps to point to new array */ - switch (opline->opcode) { -#if ZEND_USE_ABS_JMP_ADDR && !ZEND_USE_ABS_CONST_ADDR - case ZEND_JMP: - case ZEND_FAST_CALL: - opline->op1.jmp_addr = &op_array->opcodes[opline->op1.jmp_addr - old_opcodes]; - break; - case ZEND_JMPZNZ: - /* relative extended_value don't have to be changed */ - /* break omitted intentionally */ - case ZEND_JMPZ: - case ZEND_JMPNZ: - case ZEND_JMPZ_EX: - case ZEND_JMPNZ_EX: - case ZEND_JMP_SET: - case ZEND_COALESCE: - case ZEND_FE_RESET_R: - case ZEND_FE_RESET_RW: - case ZEND_ASSERT_CHECK: - case ZEND_JMP_NULL: - opline->op2.jmp_addr = &op_array->opcodes[opline->op2.jmp_addr - old_opcodes]; - break; - case ZEND_CATCH: - if (!(opline->extended_value & ZEND_LAST_CATCH)) { - opline->op2.jmp_addr = &op_array->opcodes[opline->op2.jmp_addr - old_opcodes]; - } - break; - case ZEND_FE_FETCH_R: - case ZEND_FE_FETCH_RW: - case ZEND_SWITCH_LONG: - case ZEND_SWITCH_STRING: - case ZEND_MATCH: - /* relative extended_value don't have to be changed */ - break; -#endif - case ZEND_IS_IDENTICAL: - case ZEND_IS_NOT_IDENTICAL: - case ZEND_IS_EQUAL: - case ZEND_IS_NOT_EQUAL: - case ZEND_IS_SMALLER: - case ZEND_IS_SMALLER_OR_EQUAL: - case ZEND_CASE: - case ZEND_CASE_STRICT: - case ZEND_ISSET_ISEMPTY_CV: - case ZEND_ISSET_ISEMPTY_VAR: - case ZEND_ISSET_ISEMPTY_DIM_OBJ: - case ZEND_ISSET_ISEMPTY_PROP_OBJ: - case ZEND_ISSET_ISEMPTY_STATIC_PROP: - case ZEND_INSTANCEOF: - case ZEND_TYPE_CHECK: - case ZEND_DEFINED: - case ZEND_IN_ARRAY: - case ZEND_ARRAY_KEY_EXISTS: - if (opline->result_type & IS_TMP_VAR) { - /* reinitialize result_type of smart branch instructions */ - if (opline + 1 < end) { - if ((opline+1)->opcode == ZEND_JMPZ - && (opline+1)->op1_type == IS_TMP_VAR - && (opline+1)->op1.var == opline->result.var) { - opline->result_type = IS_SMART_BRANCH_JMPZ | IS_TMP_VAR; - } else if ((opline+1)->opcode == ZEND_JMPNZ - && (opline+1)->op1_type == IS_TMP_VAR - && (opline+1)->op1.var == opline->result.var) { - opline->result_type = IS_SMART_BRANCH_JMPNZ | IS_TMP_VAR; - } - } - } - break; - } - zend_vm_set_opcode_handler_ex(opline, op1_info, op2_info, res_info); - opline++; - } - - op_array->fn_flags |= ZEND_ACC_DONE_PASS_TWO; -} - -static void zend_optimize_op_array(zend_op_array *op_array, - zend_optimizer_ctx *ctx) -{ - /* Revert pass_two() */ - zend_revert_pass_two(op_array); - - /* Do actual optimizations */ - zend_optimize(op_array, ctx); - - /* Redo pass_two() */ - zend_redo_pass_two(op_array); - - if (op_array->live_range) { - zend_recalc_live_ranges(op_array, NULL); - } -} - -static void zend_adjust_fcall_stack_size(zend_op_array *op_array, zend_optimizer_ctx *ctx) -{ - zend_function *func; - zend_op *opline, *end; - - opline = op_array->opcodes; - end = opline + op_array->last; - while (opline < end) { - if (opline->opcode == ZEND_INIT_FCALL) { - func = zend_hash_find_ptr( - &ctx->script->function_table, - Z_STR_P(RT_CONSTANT(opline, opline->op2))); - if (func) { - opline->op1.num = zend_vm_calc_used_stack(opline->extended_value, func); - } - } - opline++; - } -} - -static void zend_adjust_fcall_stack_size_graph(zend_op_array *op_array) -{ - zend_func_info *func_info = ZEND_FUNC_INFO(op_array); - - if (func_info) { - zend_call_info *call_info =func_info->callee_info; - - while (call_info) { - zend_op *opline = call_info->caller_init_opline; - - if (opline && call_info->callee_func && opline->opcode == ZEND_INIT_FCALL) { - opline->op1.num = zend_vm_calc_used_stack(opline->extended_value, call_info->callee_func); - } - call_info = call_info->next_callee; - } - } -} - -static bool needs_live_range(zend_op_array *op_array, zend_op *def_opline) { - zend_func_info *func_info = ZEND_FUNC_INFO(op_array); - zend_ssa_op *ssa_op = &func_info->ssa.ops[def_opline - op_array->opcodes]; - int ssa_var = ssa_op->result_def; - if (ssa_var < 0) { - /* Be conservative. */ - return 1; - } - - /* If the variable is used by a PHI, this may be the assignment of the final branch of a - * ternary/etc structure. While this is where the live range starts, the value from the other - * branch may also be used. As such, use the type of the PHI node for the following check. */ - if (func_info->ssa.vars[ssa_var].phi_use_chain) { - ssa_var = func_info->ssa.vars[ssa_var].phi_use_chain->ssa_var; - } - - uint32_t type = func_info->ssa.var_info[ssa_var].type; - return (type & (MAY_BE_STRING|MAY_BE_ARRAY|MAY_BE_OBJECT|MAY_BE_RESOURCE|MAY_BE_REF)) != 0; -} - -void zend_foreach_op_array(zend_script *script, zend_op_array_func_t func, void *context) -{ - zend_class_entry *ce; - zend_string *key; - zend_op_array *op_array; - - func(&script->main_op_array, context); - - ZEND_HASH_FOREACH_PTR(&script->function_table, op_array) { - func(op_array, context); - } ZEND_HASH_FOREACH_END(); - - ZEND_HASH_FOREACH_STR_KEY_PTR(&script->class_table, key, ce) { - if (ce->refcount > 1 && !zend_string_equals_ci(key, ce->name)) { - continue; - } - ZEND_HASH_FOREACH_PTR(&ce->function_table, op_array) { - if (op_array->scope == ce - && op_array->type == ZEND_USER_FUNCTION - && !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) { - func(op_array, context); - } - } ZEND_HASH_FOREACH_END(); - } ZEND_HASH_FOREACH_END(); -} - -static void step_optimize_op_array(zend_op_array *op_array, void *context) { - zend_optimize_op_array(op_array, (zend_optimizer_ctx *) context); -} - -static void step_adjust_fcall_stack_size(zend_op_array *op_array, void *context) { - zend_adjust_fcall_stack_size(op_array, (zend_optimizer_ctx *) context); -} - -static void step_dump_after_optimizer(zend_op_array *op_array, void *context) { - zend_dump_op_array(op_array, ZEND_DUMP_LIVE_RANGES, "after optimizer", NULL); -} - -int zend_optimize_script(zend_script *script, zend_long optimization_level, zend_long debug_level) -{ - zend_class_entry *ce; - zend_string *key; - zend_op_array *op_array; - zend_string *name; - zend_optimizer_ctx ctx; - zend_call_graph call_graph; - - ctx.arena = zend_arena_create(64 * 1024); - ctx.script = script; - ctx.constants = NULL; - ctx.optimization_level = optimization_level; - ctx.debug_level = debug_level; - - if ((ZEND_OPTIMIZER_PASS_6 & optimization_level) && - (ZEND_OPTIMIZER_PASS_7 & optimization_level) && - zend_build_call_graph(&ctx.arena, script, &call_graph) == SUCCESS) { - /* Optimize using call-graph */ - int i; - zend_func_info *func_info; - - for (i = 0; i < call_graph.op_arrays_count; i++) { - zend_revert_pass_two(call_graph.op_arrays[i]); - zend_optimize(call_graph.op_arrays[i], &ctx); - } - - zend_analyze_call_graph(&ctx.arena, script, &call_graph); - - for (i = 0; i < call_graph.op_arrays_count; i++) { - func_info = ZEND_FUNC_INFO(call_graph.op_arrays[i]); - if (func_info) { - func_info->call_map = zend_build_call_map(&ctx.arena, func_info, call_graph.op_arrays[i]); - if (call_graph.op_arrays[i]->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) { - zend_init_func_return_info(call_graph.op_arrays[i], script, &func_info->return_info); - } - } - } - - for (i = 0; i < call_graph.op_arrays_count; i++) { - func_info = ZEND_FUNC_INFO(call_graph.op_arrays[i]); - if (func_info) { - if (zend_dfa_analyze_op_array(call_graph.op_arrays[i], &ctx, &func_info->ssa) == SUCCESS) { - func_info->flags = func_info->ssa.cfg.flags; - } else { - ZEND_SET_FUNC_INFO(call_graph.op_arrays[i], NULL); - } - } - } - - //TODO: perform inner-script inference??? - for (i = 0; i < call_graph.op_arrays_count; i++) { - func_info = ZEND_FUNC_INFO(call_graph.op_arrays[i]); - if (func_info) { - zend_dfa_optimize_op_array(call_graph.op_arrays[i], &ctx, &func_info->ssa, func_info->call_map); - } - } - - if (debug_level & ZEND_DUMP_AFTER_PASS_7) { - for (i = 0; i < call_graph.op_arrays_count; i++) { - zend_dump_op_array(call_graph.op_arrays[i], 0, "after pass 7", NULL); - } - } - - if (ZEND_OPTIMIZER_PASS_11 & optimization_level) { - for (i = 0; i < call_graph.op_arrays_count; i++) { - zend_optimizer_compact_literals(call_graph.op_arrays[i], &ctx); - if (debug_level & ZEND_DUMP_AFTER_PASS_11) { - zend_dump_op_array(call_graph.op_arrays[i], 0, "after pass 11", NULL); - } - } - } - - if (ZEND_OPTIMIZER_PASS_13 & optimization_level) { - for (i = 0; i < call_graph.op_arrays_count; i++) { - zend_optimizer_compact_vars(call_graph.op_arrays[i]); - if (debug_level & ZEND_DUMP_AFTER_PASS_13) { - zend_dump_op_array(call_graph.op_arrays[i], 0, "after pass 13", NULL); - } - } - } - - if (ZEND_OPTIMIZER_PASS_12 & optimization_level) { - for (i = 0; i < call_graph.op_arrays_count; i++) { - zend_adjust_fcall_stack_size_graph(call_graph.op_arrays[i]); - } - } - - for (i = 0; i < call_graph.op_arrays_count; i++) { - op_array = call_graph.op_arrays[i]; - func_info = ZEND_FUNC_INFO(op_array); - if (func_info && func_info->ssa.var_info) { - zend_redo_pass_two_ex(op_array, &func_info->ssa); - if (op_array->live_range) { - zend_recalc_live_ranges(op_array, needs_live_range); - } - } else { - zend_redo_pass_two(op_array); - if (op_array->live_range) { - zend_recalc_live_ranges(op_array, NULL); - } - } - } - - for (i = 0; i < call_graph.op_arrays_count; i++) { - ZEND_SET_FUNC_INFO(call_graph.op_arrays[i], NULL); - } - } else { - zend_foreach_op_array(script, step_optimize_op_array, &ctx); - - if (ZEND_OPTIMIZER_PASS_12 & optimization_level) { - zend_foreach_op_array(script, step_adjust_fcall_stack_size, &ctx); - } - } - - ZEND_HASH_FOREACH_STR_KEY_PTR(&script->class_table, key, ce) { - if (ce->refcount > 1 && !zend_string_equals_ci(key, ce->name)) { - continue; - } - ZEND_HASH_FOREACH_STR_KEY_PTR(&ce->function_table, name, op_array) { - if (op_array->scope != ce && op_array->type == ZEND_USER_FUNCTION) { - zend_op_array *orig_op_array = - zend_hash_find_ptr(&op_array->scope->function_table, name); - - ZEND_ASSERT(orig_op_array != NULL); - if (orig_op_array != op_array) { - uint32_t fn_flags = op_array->fn_flags; - zend_function *prototype = op_array->prototype; - HashTable *ht = op_array->static_variables; - - *op_array = *orig_op_array; - op_array->fn_flags = fn_flags; - op_array->prototype = prototype; - op_array->static_variables = ht; - } - } - } ZEND_HASH_FOREACH_END(); - } ZEND_HASH_FOREACH_END(); - - if ((debug_level & ZEND_DUMP_AFTER_OPTIMIZER) && - (ZEND_OPTIMIZER_PASS_7 & optimization_level)) { - zend_foreach_op_array(script, step_dump_after_optimizer, NULL); - } - - if (ctx.constants) { - zend_hash_destroy(ctx.constants); - } - zend_arena_destroy(ctx.arena); - - return 1; -} - -int zend_optimizer_startup(void) -{ - return zend_func_info_startup(); -} - -int zend_optimizer_shutdown(void) -{ - return zend_func_info_shutdown(); -} |