[Bug rtl-optimization/122170] [15/16 Regression] gcc 15.2.0 (and gcc 15.1.0 as well) - ICE upon try to build CMSIS_DSP Library with and Optimization on

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122170

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
noce_can_force_operand returns true:

(gdb) p debug_rtx(new_val)
(ss_minus:SI (reg:SI 96)
    (reg:SI 94 [ c.1_1 ]))
$12 = void
(gdb) p noce_can_force_operand(new_val)
$13 = true

This is because code_to_optab returns an optab which is correct but we don't
check if the optab is implemented for that mode ...