https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #13 from Alexander Fomin ---
Filed PR68541
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
Alexander Fomin changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #11 from ktkachov at gcc dot gnu.org ---
The RTL if-conversion issue should be fixed now.
So now only the path-splitting problem remains?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #10 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Wed Nov 25 09:48:29 2015
New Revision: 230859
URL: https://gcc.gnu.org/viewcvs?rev=230859&root=gcc&view=rev
Log:
[RTL-ifcvt] PR rtl-optimization/68435 Allow (c ? x++ : x-
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #9 from ktkachov at gcc dot gnu.org ---
Since the provided testcase is affected by the path splitting patch, here's an
alternative testcase that exhibits the ifcvt issue even with the latest trunk.
I'll be working on this:
typedef str
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #8 from ktkachov at gcc dot gnu.org ---
(In reply to Yuri Rumyantsev from comment #6)
> It turned out that fresh gcc performs tail duplication (aka path splitting)
> preventing if-conversion. So I post a dump for 20150929 compiler whic
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #7 from Yuri Rumyantsev ---
Created attachment 36780
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36780&action=edit
rtl-ce1 dump file
The dump is for 20150929 compiler
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #6 from Yuri Rumyantsev ---
It turned out that fresh gcc performs tail duplication (aka path splitting)
preventing if-conversion. So I post a dump for 20150929 compiler which
reproduces the issue.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #4 from Yuri Rumyantsev ---
Created attachment 36774
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36774&action=edit
tar file
tar file contains good and bad ce1-rtl dumps showing the problem
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
ktkachov at gcc dot gnu.org changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #3 from Alexander Fomin ---
This can be reproduced both for i686-*-* and x86_64-*-* hosts.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
--- Comment #2 from Yuri Rumyantsev ---
I will post 2 rtl dumps for ce1 phase produced with -O2 -m32 options on ix86.
You can see that file t21.c.203r.ce1 produced by 20110927 compiler contains
3 possible IF blocks searched.
1 IF blocks converted
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68435
ktkachov at gcc dot gnu.org changed:
What|Removed |Added
CC||ktkachov at gcc dot gnu.org
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