[Bug target/123484] [14/15/16 Regression] ICE: in expand_mult, at expmed.cc:3633 with -Ofast -march=graniterapids-d

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123484

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |liuhongt at gcc dot gnu.org
     Ever confirmed|0                           |1
   Target Milestone|---                         |14.4
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2026-01-08
           Priority|P3                          |P2

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is expansion of a MULT of V4HFmode on

(reg:V4HF 107 [ _34 ])

and

(const_vector:V4HF [
        (const_double:HF 2.4993896484375e-2 [0x0.cccp-5])
        (const_double:HF +Inf [+Inf]) repeated x3
    ])

which fails using the smul_optab.  Also fails the same way with spr, but
not with -m64.