[avr-chat] Re: [avr-gcc-list] Bad code generated when using volatile keyword/-O0 opt?

[Rick Mann]

On Feb 12, 2006, at 9:20 AM, Ned Konz wrote:

> Why does it seem like a bug?

It seems like a bug because that code wouldn't execute properly. I'd  
step through it in gdb (in assembly), and watch as it decremented a  
register, then a few instructions later reloaded the register with  
the previous value. Now that I'm no longer in '103 compatibility mode  
(thanks again for that tip), it doesn't seem to happen.

> Is this your entire program, or might there be an interrupt handler  
> that's trashing one or another registers or memory locations?

Even with empty ISRs it happened.

--
Rick

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