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* [Bug c/49183] New: gcc removes assert
@ 2011-05-27 1:44 overseers at suremail dot info
2011-05-27 2:36 ` [Bug c/49183] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: overseers at suremail dot info @ 2011-05-27 1:44 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49183
Summary: gcc removes assert
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: overseers@suremail.info
gcc -O2 removes asserts like assert(i+10>i). Please fix.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/49183] gcc removes assert
2011-05-27 1:44 [Bug c/49183] New: gcc removes assert overseers at suremail dot info
@ 2011-05-27 2:36 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2011-05-27 2:36 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49183
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-05-27 01:43:29 UTC ---
assert(i+10>i) is always true if i is signed as signed integer overflow is
undefined. If i is MAX_INT then i+10 will overflow and the result is
undefined, so GCC assumes that the result will never be less than i. If you
want signed integer to be defined as wrapping use -fwrapv.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-05-27 1:44 [Bug c/49183] New: gcc removes assert overseers at suremail dot info
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