GCC built with latest binutils and the patch give the following
performance improve:
spec2000INT +3% at "-O2 -m32", +1,5% at "-O2 -m64".
Some other benchmark scores at "-O2" were also improved up to 6%.
The patch is very efficient for PIE mode.
Thanks,
Evgeny
On Tue, May 5, 2015 at 6:30 PM, H.J
On Wed, Apr 22, 2015 at 9:34 AM, H.J. Lu wrote:
> Normally, with PIE, GCC accesses globals that are extern to the module
> using GOT. This is two instructions, one to get the address of the global
> from GOT and the other to get the value. Examples:
>
> ---
> extern int a_glob;
> int
> main ()
>
On Wed, Apr 22, 2015 at 3:15 PM, Ramana Radhakrishnan
wrote:
> On Wed, Apr 22, 2015 at 5:34 PM, H.J. Lu wrote:
>> Normally, with PIE, GCC accesses globals that are extern to the module
>> using GOT. This is two instructions, one to get the address of the global
>> from GOT and the other to get t
On Wed, Apr 22, 2015 at 5:34 PM, H.J. Lu wrote:
> Normally, with PIE, GCC accesses globals that are extern to the module
> using GOT. This is two instructions, one to get the address of the global
> from GOT and the other to get the value. Examples:
>
> ---
> extern int a_glob;
> int
> main ()
>
Normally, with PIE, GCC accesses globals that are extern to the module
using GOT. This is two instructions, one to get the address of the global
from GOT and the other to get the value. Examples:
---
extern int a_glob;
int
main ()
{
return a_glob;
}
---
With PIE, the generated code accesses g
