[Bug analyzer/105112] Speed up -fanalyzer on big-code.c

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105112

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Possible simplification: don't try to model floating-point operations e.g. any
binop on a floating point value has unknown_svalue as the result, so that
complicated floating-point computations can be quickly handled with a "we don't
care" value.   (though do we care about tainted divisors for floating-point?)