PHP :: Bug #68888 :: Useless Code

Bug #68888	Useless Code
Submitted:	2015-01-22 14:37 UTC	Modified:	2015-01-22 14:50 UTC
From:	bugreports at internot dot info	Assigned:
Status:	Not a bug	Package:	*General Issues
PHP Version:	master-Git-2015-01-22 (Git)	OS:	Linux Ubuntu 14.04
Private report:	No	CVE-ID:	None

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[2015-01-22 14:37 UTC] bugreports at internot dot info

Description:
------------
Hi,

In Zend/zend_operators.c:


        if (UNEXPECTED((zend_ulong)op2_lval >= SIZEOF_ZEND_LONG * 8)) {
                if (EXPECTED(op2_lval > 0)) {
                        ZVAL_LONG(result, 0);
                        return SUCCESS;
                } else {

If "op2_lval >= SIZEOF_ZEND_LONG * 8" is true, then "op2_lval > 0" will always be true, no?


Thanks,

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[2015-01-22 14:50 UTC] nikic@php.net

-Status: Open +Status: Not a bug

[2015-01-22 14:50 UTC] nikic@php.net

Nope, because of the (zend_ulong) cast. The condition effectively checks if op2_lval is negative OR greater than the maximum shift width.

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