[Bug tree-optimization/112505] [12/13/14 Regression] internal compiler error: in build_vector_from_val, at tree.cc:2104

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112505

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |11.1.0, 11.4.0
           Keywords|                            |ice-on-valid-code,
                   |                            |needs-bisection
     Ever confirmed|0                           |1
      Known to fail|                            |12.1.0
   Target Milestone|---                         |12.4
            Summary|GCC: 14: internal compiler  |[12/13/14 Regression]
                   |error: in                   |internal compiler error: in
                   |build_vector_from_val, at   |build_vector_from_val, at
                   |tree.cc:2104                |tree.cc:2104
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-11-13
          Component|c                           |tree-optimization

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Simplier testcase:
```
short int w9;
struct T {
  short a : 14;
  int b;
};
struct T v;
void zc() {
        for(int i = 0; i < 4; i ++)
  w9 *= v.b ? v.a-- < 0 : 0;
}
```
Just compiler at `-O3 -fno-vect-cost-model`

  <unnamed-unsigned:14> _30;
  vector(4) unsigned short _31;
...
  _31 = {_60, _59, _2, _30};
  _52 = (vector(4) signed short) _31;