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[Bug target/64217] LRA: generate wrong liveness info after r217947 for clobber in jump_insn
- From: "jasonwucj at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 12 Dec 2014 04:07:51 +0000
- Subject: [Bug target/64217] LRA: generate wrong liveness info after r217947 for clobber in jump_insn
- Auto-submitted: auto-generated
- References: <bug-64217-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64217
Chung-Ju Wu <jasonwucj at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2014-12-12
CC| |jasonwucj at gcc dot gnu.org
Component|rtl-optimization |target
Assignee|unassigned at gcc dot gnu.org |jasonwucj at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Chung-Ju Wu <jasonwucj at gcc dot gnu.org> ---
(In reply to Vladimir Makarov from comment #1)
>
> So I'd add at least '=' but it is better to add '=r' or '=<some other
> register constraint>' to solve the problem.
>
Thanks Kito for reporting this issue.
Also thanks Vladimir to help identify the root cause.
Sorry for that our wrong pattern makes LRA live range analysis confused.
I will have a patch to fix it soon. Thanks both of you. :)