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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/103206] New: ICE in insn_default_length, at
 config/aarch64/aarch64.md:1183
Date: Fri, 12 Nov 2021 10:05:57 +0000
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X-Bugzilla-Keywords: ice-on-valid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103206

            Bug ID: 103206
           Summary: ICE in insn_default_length, at
                    config/aarch64/aarch64.md:1183
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: qing.zhao at oracle dot com
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: aarch64-linux-gnu

The following fails:

$ aarch64-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/aarch64/sve/pr102587-=
1.c
-ftrivial-auto-var-init=3Dzero
...
0xdeadbeef _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc=
/rtl-error.c:108
0xdeadbeef _fatal_insn_not_found(rtx_def const*, char const*, int, char con=
st*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc=
/rtl-error.c:116
0xdeadbeef insn_default_length(rtx_insn*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc=
/config/aarch64/aarch64.md:1183
0xdeadbeef shorten_branches(rtx_insn*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc=
/final.c:1105
0xdeadbeef rest_of_handle_shorten_branches
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc=
/final.c:4380
0xdeadbeef execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc=
/final.c:4409=