From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 34F7B3857C62; Thu, 30 Sep 2021 07:29:36 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 34F7B3857C62
From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/102519] [12 Regression] VRP Jump threader memory
 explosion
Date: Thu, 30 Sep 2021 07:29:35 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: memory-hog
X-Bugzilla-Severity: normal
X-Bugzilla-Who: aldyh at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 12.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-102519-4-hUKIvaoP3j@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-102519-4@http.gcc.gnu.org/bugzilla/>
References: <bug-102519-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 30 Sep 2021 07:29:36 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102519

--- Comment #23 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
I have built a cross to ppcle on gcc135 (ppc64le) and then bisected the low=
est
amount of memory ./cc1 -O2 can compile rlwimi-1.c (via ulimit -v).

Before the VRP threader replacement it could run with 271megs.  Current tru=
nk
can run it with 289megs for a 6.6% increase.

I also tried valgrind both on a cross from x86-64 and on ppc64le.  Nothing
comes up except some existing sparseset_bit_p stuff.

I still cannot reproduce :-(.=