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RE: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os

From: Weddington, Eric
Subject: RE: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os
Date: Thu, 22 May 2008 11:13:52 -0600


> -----Original Message-----
> From: Anatoly Sokolov [mailto:address@hidden 
> Sent: Thursday, May 22, 2008 11:09 AM
> To: Weddington, Eric; David Brown; address@hidden
> Subject: Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os
> Hi.
> > An alternative way to handle this sort of thing would be to 
> implement a 
> > "critical" function attribute like in the msp430 port of gcc - a 
> > function with this attribute has interrupts disabled at the 
> start, and 
> > restored at the end.  
>   It will work for for tiny and mega devices, but xmega 
> devices have Non-Maskable Interrupts, and clearing of the 
> I-bit does not guarantee 
> full continuity execution of a code.

>  I shall make a patch for "critical" attribute.

Thanks for doing this. When you make the patch, be sure that it also
works if the function is inlined.


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