TMP_VAR is not only used once #183
Description
This is the reason for issue #176 , thanks for the reporter provided a vps for me to debugging.
the new repleace_tmp_by_const assume TMP_VAR is used only once
static void replace_tmp_by_const(zend_op_array *op_array,
zend_op *opline,
zend_uint var,
zval *val
TSRMLS_DC)
{
zend_op *end = op_array->opcodes + op_array->last;
while (opline < end) {
if (ZEND_OP1_TYPE(opline) == IS_TMP_VAR &&
ZEND_OP1(opline).var == var) {
update_op1_const(op_array, opline, val TSRMLS_CC);
/* TMP_VAR my be used only once */
break;
}
unfortunately it's not, for a example:
<?php
switch(PHP_OS)
{
case "Linux":
break;
case "Linux":
break;
case "Darwin":
break;
}
the FETCH_CONSTENT result will be used multiply times. include a implicit ZEND_FREE
thanks