[Info-vax] Volatile, was: Re: yet another sys$qiow question

[Simon Clubley]

On 2015-08-19, Johnny Billquist <bqt at softjar.se> wrote:
> On 2015-08-19 15:31, Simon Clubley wrote:
>>
>> Do you mean if VarB wasn't volatile and if [some condition] didn't
>> reference a volatile variable ?
>
> It would move the assignment out of the loop unless VarB or PORTA is 
> marked as volatile.

Sorry, I missed the bit about PORTA not been volatile in this example
when it normally would be; I was thinking of one of the other posts
when I responded. If PORTA isn't volatile, it fails as you describe.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world