[Bug c/95002] VLA: 'var = sizeof array' gives spurous '= array, ' instead of just '= '

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95002

--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> ---
As discussed with Joseph on IRC:

* The 'array, 4*len' is one on purpose per C spec
  (sizeof for an expression with VLA type is defined to evaluate its argument.)
* g++ might not do this, if so, it is a bug.

* Convert should do the folding and leave the fold to gimple folding