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From: "141242068 at smail dot nju.edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/112505] New: GCC: 14: internal compiler error: in
 build_vector_from_val, at tree.cc:2104
Date: Mon, 13 Nov 2023 03:45:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112505

            Bug ID: 112505
           Summary: GCC: 14: internal compiler error: in
                    build_vector_from_val, at tree.cc:2104
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: 141242068 at smail dot nju.edu.cn
  Target Milestone: ---

Compiler Explorer: https://gcc.godbolt.org/z/nTjnh73xj

The crash triggering program (compile with `gcc-14 -O3`):
```
short int w9;
struct T {
  short a : 14;
  int b;
};
struct T v;
void __attribute__((simd)) zc() {
  w9 *=3D v.b ? v.a-- < 0 : 0;
}
```

The crash output:
```
during GIMPLE pass: vect
<source>: In function 'zc.simdclone.0':
<source>:7:28: internal compiler error: in build_vector_from_val, at
tree.cc:2104
    7 | void __attribute__((simd)) zc() {
      |                            ^~
0x238b15e internal_error(char const*, ...)
        ???:0
0xa11270 fancy_abort(char const*, int, char const*)
        ???:0
0x13ee023 vectorizable_induction(_loop_vec_info*, _stmt_vec_info*, gimple**,
_slp_tree*, vec<stmt_info_for_cost, va_heap, vl_ptr>*)
        ???:0
0x2115bf8 vect_transform_stmt(vec_info*, _stmt_vec_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*)
        ???:0
0x13fedc0 vect_transform_loop(_loop_vec_info*, gimple*)
        ???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1
```=