PATCH: Pad short functions for Atom

[H.J. Lu]

On Fri, Sep 17, 2010 at 7:26 AM, Paolo Bonzini <bonzini@gnu.org> wrote:
> On 09/16/2010 10:38 PM, H.J. Lu wrote:
>>
>> >  void
>> >  foo (int x)
>> >  {
>> >    if (x)
>> >      bar ();
>> >  }
>> >  ----
>> >
>> >  foo:
>> >          testl   %edi, %edi
>> >          jne     .L4
>> >          ret
>> >  .L4:
>> >          xorl    %eax, %eax
>> >          jmp     bar
>> >
>>
>> Padding 4 nops speeds it up by 37%.
>
> I think inlining would speed it up much more (or profiling-driven partial
> inlining for your other testcase; Honza worked on it, I think).
>

Not all functions will be inlined.


-- 
H.J.