[Bug middle-end/122286] fold (a < b) ? -1 : (a > b ? 1 : 0) into (a < b) - (a > b) or the other way around

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122286

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
```
__attribute__((optimize("-ffinite-math-only","-fno-signaling-nans",
"-fno-trapping-math")))
int cmp_double_asc(double a, double b) {
     return (a < b) ? -1 : (a > b ? 1 : 0);
}

int cmp_double_asc_2(double a, double b) {
    return (a < b) ? -1 : (a > b ? 1 : 0);
}

__attribute__((optimize("-ffinite-math-only","-fno-signaling-nans",
"-fno-trapping-math")))
int cmp_double_asc_branchless(double a, double b) {
    return (a < b) - (a > b);
}
```