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* [Bug c/21781] New: real.c incorrectly values zero with a large exponent
@ 2005-05-27 12:36 neil at gcc dot gnu dot org
2005-05-27 13:18 ` [Bug middle-end/21781] " pinskia at gcc dot gnu dot org
2005-05-28 11:08 ` jsm28 at gcc dot gnu dot org
0 siblings, 2 replies; 6+ messages in thread
From: neil at gcc dot gnu dot org @ 2005-05-27 12:36 UTC (permalink / raw)
To: gcc-bugs
The following snippet, if compiled with -Wall, complains about a missing return
statement, indicating GCC is erroneously folding the comparison to false.
int foo(void) { if (.0e200000000 == 0 ) return 1; }
--
Summary: real.c incorrectly values zero with a large exponent
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: neil at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21781
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/21781] real.c incorrectly values zero with a large exponent 2005-05-27 12:36 [Bug c/21781] New: real.c incorrectly values zero with a large exponent neil at gcc dot gnu dot org @ 2005-05-27 13:18 ` pinskia at gcc dot gnu dot org 2005-05-28 11:08 ` jsm28 at gcc dot gnu dot org 1 sibling, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-05-27 13:18 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Component|c |middle-end http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21781 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/21781] real.c incorrectly values zero with a large exponent 2005-05-27 12:36 [Bug c/21781] New: real.c incorrectly values zero with a large exponent neil at gcc dot gnu dot org 2005-05-27 13:18 ` [Bug middle-end/21781] " pinskia at gcc dot gnu dot org @ 2005-05-28 11:08 ` jsm28 at gcc dot gnu dot org 1 sibling, 0 replies; 6+ messages in thread From: jsm28 at gcc dot gnu dot org @ 2005-05-28 11:08 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- OtherBugsDependingO| |16620, 16989 nThis| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21781 ^ permalink raw reply [flat|nested] 6+ messages in thread
[parent not found: <bug-21781-6@http.gcc.gnu.org/bugzilla/>]
* [Bug middle-end/21781] real.c incorrectly values zero with a large exponent [not found] <bug-21781-6@http.gcc.gnu.org/bugzilla/> @ 2005-10-25 19:49 ` pinskia at gcc dot gnu dot org 2006-03-16 16:34 ` sayle at gcc dot gnu dot org 2006-03-16 18:27 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-10-25 19:49 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from pinskia at gcc dot gnu dot org 2005-10-25 19:49 ------- Confirmed, testcase which shows this is also a rejects valid: int f[.0e200000000 == 0?1:-1]; -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Keywords| |rejects-valid, wrong-code Last reconfirmed|0000-00-00 00:00:00 |2005-10-25 19:49:43 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21781 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/21781] real.c incorrectly values zero with a large exponent [not found] <bug-21781-6@http.gcc.gnu.org/bugzilla/> 2005-10-25 19:49 ` pinskia at gcc dot gnu dot org @ 2006-03-16 16:34 ` sayle at gcc dot gnu dot org 2006-03-16 18:27 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 6+ messages in thread From: sayle at gcc dot gnu dot org @ 2006-03-16 16:34 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from sayle at gcc dot gnu dot org 2006-03-16 16:34 ------- Subject: Bug 21781 Author: sayle Date: Thu Mar 16 16:34:05 2006 New Revision: 112136 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112136 Log: PR middle-end/21781 * real.c (real_from_string): If the mantissa is zero, don't bother parsing the exponent as the result should always be zero. * gcc.dg/real-const-1.c: New test case. Added: trunk/gcc/testsuite/gcc.dg/real-const-1.c Modified: trunk/gcc/ChangeLog trunk/gcc/real.c trunk/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21781 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/21781] real.c incorrectly values zero with a large exponent [not found] <bug-21781-6@http.gcc.gnu.org/bugzilla/> 2005-10-25 19:49 ` pinskia at gcc dot gnu dot org 2006-03-16 16:34 ` sayle at gcc dot gnu dot org @ 2006-03-16 18:27 ` pinskia at gcc dot gnu dot org 2 siblings, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu dot org @ 2006-03-16 18:27 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from pinskia at gcc dot gnu dot org 2006-03-16 18:27 ------- Fixed. -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED Target Milestone|--- |4.2.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21781 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-03-16 18:27 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-05-27 12:36 [Bug c/21781] New: real.c incorrectly values zero with a large exponent neil at gcc dot gnu dot org
2005-05-27 13:18 ` [Bug middle-end/21781] " pinskia at gcc dot gnu dot org
2005-05-28 11:08 ` jsm28 at gcc dot gnu dot org
[not found] <bug-21781-6@http.gcc.gnu.org/bugzilla/>
2005-10-25 19:49 ` pinskia at gcc dot gnu dot org
2006-03-16 16:34 ` sayle at gcc dot gnu dot org
2006-03-16 18:27 ` pinskia at gcc dot gnu dot org
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