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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/113172] New: ice in move_early_exit_stmts
Date: Fri, 29 Dec 2023 19:14:20 +0000
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X-Bugzilla-Version: 14.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113172

            Bug ID: 113172
           Summary: ice in move_early_exit_stmts
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For this C code:

int tswchp_2;
short cpy_buf[8];
void ts_endcmd() {
  int i =3D 0;
  for (; i < 8 && i < tswchp_2; i++)
    cpy_buf[i] =3D i;
}

compiled by recent gcc trunk, does this:

cvise $ ~/gcc/results/bin/gcc -c -O3  bug994.c
cvise $ ~/gcc/results/bin/gcc -c -O3 -march=3Dznver3 bug994.c
during GIMPLE pass: vect
bug994.c: In function =E2=80=98ts_endcmd=E2=80=99:
bug994.c:3:6: internal compiler error: Segmentation fault
    3 | void ts_endcmd() {
      |      ^~~~~~~~~
0xeeade9 crash_signal(int)
        ../../trunk.20210101/gcc/toplev.cc:316
0x11a8e63 gsi_prev(gimple_stmt_iterator*)
        ../../trunk.20210101/gcc/gimple-iterator.h:236
0x11a8e63 move_early_exit_stmts(_loop_vec_info*)
        ../../trunk.20210101/gcc/tree-vect-loop.cc:11807=