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Implement ZEND_DEFINED optimization

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This commit is contained in:
Nikita Popov 2014-07-22 23:27:00 +02:00
parent 7892b89465
commit 0356e07a05
1 changed files with 34 additions and 1 deletions
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35
Zend/zend_compile.c
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@ -4318,6 +4318,36 @@ int zend_compile_func_typecheck(znode *result, zend_ast *args_ast, zend_uint typ
return SUCCESS;
}
int zend_compile_func_defined(znode *result, zend_ast *args_ast TSRMLS_DC) {
zend_string *name;
zend_op *opline;
if (args_ast->children != 1 || args_ast->child[0]->kind != ZEND_AST_ZVAL) {
return FAILURE;
}
name = zval_get_string(zend_ast_get_zval(args_ast->child[0]));
if (zend_memrchr(name->val, '\\', name->len) || zend_memrchr(name->val, ':', name->len)) {
STR_RELEASE(name);
return FAILURE;
}
opline = emit_op(result, ZEND_DEFINED, NULL, NULL TSRMLS_CC);
opline->op1_type = IS_CONST;
LITERAL_STR(opline->op1, name);
GET_CACHE_SLOT(opline->op1.constant);
/* Lowercase constant name in a separate literal */
{
zval c;
zend_string *lcname = STR_ALLOC(name->len, 0);
zend_str_tolower_copy(lcname->val, name->val, name->len);
ZVAL_NEW_STR(&c, lcname);
zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
}
return SUCCESS;
}
int zend_try_compile_special_func(
znode *result, zend_string *lcname, zend_ast *args_ast TSRMLS_DC
) {
@ -4339,8 +4369,11 @@ int zend_try_compile_special_func(
return zend_compile_func_typecheck(result, args_ast, IS_OBJECT TSRMLS_CC);
} else if (zend_str_equals(lcname, "is_resource")) {
return zend_compile_func_typecheck(result, args_ast, IS_RESOURCE TSRMLS_CC);
}
} else if (zend_str_equals(lcname, "defined")) {
return zend_compile_func_defined(result, args_ast TSRMLS_CC);
} else {
return FAILURE;
}
}
void zend_compile_call(znode *result, zend_ast *ast, int type TSRMLS_DC) {