Re: [avr-gcc-list] Problem with Bit Shift using WinAVR20071221rc1

[Paulo Marques]

Moritz Federspiel wrote:
> Hello everyone!

Hi, Moritz

> I got a little Problem on this simple Code:
>
> /-------------code start-------------------/
>
> uint32_t i; t;
>
> for(i=0; i<20; i++)
>   t = (1<<i);

This isn't actual compilable code... you should send a compilable 
example so that others can test it.

The code you shown as several problems:

 - the for loop as no side effects, so the compiler could just optimize 
it to: t = (1 << 19)

 - "t" isn't being used afterwards, so the compiler could just optimize 
everything away

Please send a small compilable example so that we can see what is going on.

--
Paulo Marques
Software Development Department - Grupo PIE, S.A.
Phone: +351 252 290600, Fax: +351 252 290601
Web: www.grupopie.com

"All generalizations are false."