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Re: Combine four insns
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.