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[Bug rtl-optimization/62151] [5 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
- From: "amker at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 15 Aug 2014 15:39:36 +0000
- Subject: [Bug rtl-optimization/62151] [5 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
- Auto-submitted: auto-generated
- References: <bug-62151-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62151
--- Comment #6 from amker at gcc dot gnu.org ---
(In reply to Richard Biener from comment #5)
> Note that probably also made a latent issue pop up.
Indeed. After preliminary investigation, I think this case reveals two latent
issues. The first one is a missed optimization opportunity on GIMPLE, while
the second one is a wrong code issue in RTL combine.
I will firstly look into the combine issue and send a report later.
Thanks,
bin