Bug 17205 - FP comparison optimization bug on i686.
Summary: FP comparison optimization bug on i686.
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: gcc
Version: 7.1
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Jakub Jelinek
QA Contact:
URL: http://gcc.gnu.org/ml/gcc-patches/200...
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2000-09-03 16:09 UTC by Red Hat Bugzilla
Modified: 2008-05-01 15:37 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2000-09-07 22:02:30 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2000:132 0 normal SHIPPED_LIVE Bug fixing update of GCC 2.96 2000-12-19 05:00:00 UTC

Description Red Hat Bugzilla 2000-09-03 16:09:22 UTC 
When you use -O -march=i686 on gcc.c-torture/execute/ieee/920810-1.c,
the testcase will fail. I believe it is a regression, at least for me. 
It may have something to do FP comparison optimization on i686. I 
will take a look when I find time.
Comment 1 Red Hat Bugzilla 2000-09-03 19:42:59 UTC 
Seems to happen both in our gcc and vanilla CVS head, looks like
combiner "optimizes" it out. Will try to debug it.
Comment 2 Red Hat Bugzilla 2000-09-07 22:02:28 UTC 
Fixed by

http://gcc.gnu.org/ml/gcc-patches/2000-09/msg00092.html
Comment 3 Red Hat Bugzilla 2000-10-24 08:20:00 UTC 
Should be fixed in gcc-2.96-60 in rawhide.
Note You need to log in before you can comment on or make changes to this bug.