[Bug target/112359] [14 Regression] ICE: in expand_fn_using_insn, at internal-fn.cc:215 with -O -ftree-loop-if-convert -mavx512fp16

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112359

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-11-03
             Status|UNCONFIRMED                 |NEW
                 CC|                            |rdapp at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1
           Priority|P3                          |P1
   Target Milestone|---                         |14.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  We get

_ifc__24 = .COND_IOR (_30, u_lsm.8_6, ivtmp.16_8, u_lsm.8_6);

we shouldn't have generated these outside of if (vectorized) versions or when
not vectorizing.  I see we discover this opportunities "late", after deciding
whether to version the loop or not.  We have to refrain from taking the
opportunity when we didn't version.