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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/108805] [13 Regression] ICE: in
 simplify_subreg, at simplify-rtx.cc:7400 at -O and above
Date: Thu, 16 Feb 2023 07:40:11 +0000
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X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: ice-on-valid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108805

Uro=C5=A1 Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |ubizjak at gmail do=
t com
             Status|NEW                         |ASSIGNED

--- Comment #2 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
Patch in testing:

--cut here--
diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc
index 0a1dd88b0a8..281bc418df0 100644
--- a/gcc/simplify-rtx.cc
+++ b/gcc/simplify-rtx.cc
@@ -7664,7 +7664,7 @@ simplify_context::simplify_subreg (machine_mode
outermode, rtx op,
                            0).exists (&int_outermode))
     {
       rtx tem =3D simplify_subreg (int_outermode, op, innermode, byte);
-      if (tem)
+      if (tem && GET_MODE (tem) !=3D VOIDmode)
        return simplify_gen_subreg (outermode, tem, GET_MODE (tem), 0);
     }

--cut here--=