[Bug middle-end/105533] UBSAN: gcc/expmed.cc:3272:26: runtime error: signed integer overflow: -9223372036854775808 - 1 cannot be represented in type 'long int'

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105533

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |middle-end
             Target|                            |x86_64-pc-linux-gnu
               Host|x86_64-pc-linux-gnu         |

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
choose_mult_variant (machine_mode mode, HOST_WIDE_INT val,

...
  synth_mult (&alg2, val - 1, &limit, mode);


But slsr should not be processing any of these IR I don't think.

  _7 = _4 *  Inf;
  c$imag_8 = (long intD.8) _7;
  # VUSE <.MEM_16>
  i.1_9 = iD.1980;
  # RANGE [-2147483648, 2147483647]
  _10 = (long intD.8) i.1_9;
  c$real_23 = c$real_6 * _10;
  c$imag_24 = c$imag_8 * _10;

Huh? This does not make sense at all.
  float _4;
  float _7;

      if (tree_fits_shwi_p (rhs2))
        return mult_by_coeff_cost (tree_to_shwi (rhs2), lhs_mode, speed);

But I don't see that even call that.
bool
tree_fits_shwi_p (const_tree t)
{
  return (t != NULL_TREE
          && TREE_CODE (t) == INTEGER_CST
          && wi::fits_shwi_p (wi::to_widest (t)));
}