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[Bug target/66930] [5 Regression]: gengtype.c is miscompiled during stage2
- From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 23 Jul 2015 08:02:58 +0000
- Subject: [Bug target/66930] [5 Regression]: gengtype.c is miscompiled during stage2
- Auto-submitted: auto-generated
- References: <bug-66930-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66930
--- Comment #7 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Kazumoto Kojima from comment #6)
> Created attachment 36040 [details]
> .i file for gengtype.c
>
> I've confirmed a miscompile for gengtype.c with -O1 on my 5/6
> compilers.
Just for confirmation. Removing -O1 and defaulting to -O2 again lets the
current gcc-5 snapshot build past this particular issue.
Interesting that this is triggered with -O1 and not -O2. I'd expected that to
be the other way around.
> BTW, I guess that
>
> > * Build with -O1 on sh4 (try to work around PR target/66358).
>
> will open a can of worms :-)
What do you mean? Using -O1 will trigger all kinds of bugs? Or is it rather
about PR target/66358?
Adrian