[Bug tree-optimization/66623] Unsafe FP math reduction used in strict math mode

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66623
Bug 66623 depends on bug 81053, which changed state.

Bug 81053 Summary: ICE on valid code at -O3 on x86_64-linux-gnu: in as_a, at 
is-a.h:192
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81053

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED