[Bug hsa/86948] Internal compiler error compiling brig.dg/test/gimple/mulhi.hsail

[amonakov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86948

--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Created attachment 44537
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44537&action=edit
expose mult-highpart via GIMPLE FE

Attaching a patch that allows creating MULT_HIGHPART_EXPR via GIMPLE FE, which
allows testing with

__GIMPLE
unsigned f(unsigned x, unsigned y)
{
  unsigned r;
  r = x h* y;
  return r;
}

(though the patch is not too sophisticated, it accepts "h<whitespace>*")