[Bug c/117747] ICE after error with gimple FE and undefined name, negating a constant

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117747

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ICE:  tree check: expected  |ICE after error with gimple
                   |class ‘type’, have          |FE and undefined name,
                   |‘exceptional’ (error_mark)  |negating a constant
                   |in                          |
                   |useless_type_conversion_p,  |
                   |at gimple-expr.cc:86        |

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
```
__GIMPLE
void foo ( ) {
  b = -7 ;
}
```