[Bug middle-end/118490] [15 Regression] ICE Indefinite recursion transforming exp-log with -frounding-math since r15-5116-ge232dc3bb5c3e8

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118490

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-01-15
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think we want to transform to (cmp @0 ({logs,exps}! @1)), that is, only
when the log/exp is constant folded.  '!' was designed for such cases
(among others).

Alternatively gate the patterns on ! HONOR_SIGN_DEPENDENT_ROUNDING