Floating point constant folding

[Fool via Digitalmars-d]

On Friday, 3 March 2017 at 22:35:15 UTC, Johan Engelen wrote:
> Clang without/with optimizations turned on:
> ❯ clang++ float.cpp && ./a.out
> 1.00000011920928955078125
>
> ❯ clang++ float.cpp -O3 && ./a.out
> 1
>
> -Johan

GCC with optimizations turned on:
$ g++ float.cpp -O3 -frounding-math && ./a.out
1.00000011920928955078125