[fpc-devel] Do bitwise operation (1 or 2) acre about the sign ? (Giving sign related hints on compilation)

[Martin]

On 14/01/2013 14:10, Jonas Maebe wrote:
> That said, the compiler contains an optimization pass that tries to 
> remove 64 bit widenings on 32 bit platforms in case it turns out they 
> were not necessary. It will also catch the above example and the 
> generated code will only contain a 32 bit operations. Semantically, 
> the result of that expression remains 64 bit though.

So I am right about the 64 bits not needed.
And the hint is simply because the compiler (for keeping it simple) will 
first extend *all* mixed signed/unsigned to 64 bit (even if not needed 
in the end).