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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/106041] [12/13 Regression] infinite loop in
 fast_dce at -O1 with aarch64
Date: Tue, 21 Feb 2023 19:33:43 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 12.1.0
X-Bugzilla-Keywords: compile-time-hog, needs-bisection
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106041

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|needs-reduction             |
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-02-21

--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
The reduced testcase doesn't fail on the trunk (but I lack preprocessed sou=
rce
for trunk to re-reduce it).  The unreduced testcase doesn't build on trunk =
due
to standard library header portability issues.

The reduced testcase is very small - two BBs, one BB with an infinite cycle=
 and
no path to exit.=