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[Bug middle-end/34852] [4.3 Regression] Revision 131576 miscompiled 178.galgel
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Jan 2008 15:34:21 -0000
- Subject: [Bug middle-end/34852] [4.3 Regression] Revision 131576 miscompiled 178.galgel
- References: <bug-34852-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from ubizjak at gmail dot com 2008-01-20 15:34 -------
(In reply to comment #3)
> Double checking patch, I don't see obvious mistakes. Since the patch should
> only affect register allocation decisions, either we see a latent bug, or
> another example of x86 extra precision causing FP program to misbehave. I used
> to have LD_PRELOAD library to set 64bit precision that often helped, I will
You can add -mpc=64 to your compile flags instead of LD_PRELOAD trick.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34852