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Avoid dangerous optimization

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This commit is contained in:
Dmitry Stogov 2015-07-06 16:52:38 +03:00
parent 1a9f4f90da
commit 436b01e379
1 changed files with 2 additions and 1 deletions
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3
ext/opcache/Optimizer/block_pass.c
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@ -762,7 +762,8 @@ static void zend_optimize_block(zend_code_block *block, zend_op_array *op_array,
*/
if (opline->opcode == ZEND_IS_EQUAL ||
opline->opcode == ZEND_IS_NOT_EQUAL ||
opline->opcode == ZEND_CASE) {
/* CASE variable will be deleted later by FREE, so we can't optimize it */
(opline->opcode == ZEND_CASE && (ZEND_OP1_TYPE(opline) & (IS_CONST|IS_CV)))) {
if (ZEND_OP1_TYPE(opline) == IS_CONST &&
(Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_FALSE ||
Z_TYPE(ZEND_OP1_LITERAL(opline)) == IS_TRUE)) {