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Re: bug disappears if compiled with -O0

From: Kip Macy <kmacy at eventdriven dot org>
To: Baurjan Ismagulov <ibr at ata dot cs dot hun dot edu dot tr>
Cc: gdb at sources dot redhat dot com
Date: Mon, 26 Jul 2004 14:15:24 -0700 (PDT)
Subject: Re: bug disappears if compiled with -O0
References: <20040725223832.GB8947@ata.cs.hun.edu.tr> <41047629.nailSP1ZPLRF@mindspring.com><20040726211129.GC2028@ata.cs.hun.edu.tr>

>
> > If the bug truly is a code generation bug, then you will need to read
> > assembly language to isolate the bug.
>
> I will as soon as I'm able to locate it. Could it be anything other than
> an optimization bug? The problem is reported also for gcc 2.95.4 on
> stable.
>
Recently I hit a bug caused by a doubleword unaligned store. It only
showed up with -O2 because the compiler would otherwise generate
single-word stores. You can try different compilers, but I would take a
close look at the generated code.


					-Kip

References:
- bug disappears if compiled with -O0
  - From: Baurjan Ismagulov
- Re: bug disappears if compiled with -O0
  - From: Michael Chastain
- Re: bug disappears if compiled with -O0
  - From: Baurjan Ismagulov

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