Re: Release novops attribute for external use?

[Andrew Haley <aph at redhat dot com>]

On 04/12/2010 07:22 PM, Dave Korn wrote:
> On 12/04/2010 17:33, Andrew Haley wrote:
>> On 04/12/2010 05:27 PM, Bingfeng Mei wrote:
>>> Hello,
>>> One of our engineers requested a feature so that
>>> compiler can avoid to re-load variables after a function
>>> call if it is known not to write to memory. It should 
>>> slash considerable code size in our applications. I found
>>> the existing "pure" and "const" cannot meet his requirements
>>> because the function is optimized out if it doesn't return
>>> a value.
>>
>> If a function doesn't write to memory and it doesn't return a
>> value, what is the point of calling it?
> 
>   Delay-loop!  That's about the only thing I can think of anyway :-)

I was thinking about non-memory-mapped I/O, a la x86 I/O ports.  But
yeah.  :-)

Andrew.