Combine four insns

[David Daney]

On 08/10/2010 09:47 AM, Andi Kleen wrote:
>>> To be honest I didn't fully understand why it's ok for -Os
>>> to be 1% slower. A lot of people use -Os.
>>
>> Yes, and they expect the smallest code possible. This patch does seem
>> to help for that.
>
> They also expect reasonable fast compilation.
>

If they did, their expectation wouldn't have come from having read the 
documentation.  As far as I can see, the *only* thing one should expect 
from -Os is smaller code.

We would all like fast compilation, but if you specify -Os, it seems to 
me that you are expressing a preference for smaller code.

David Daney