[Bug ld/18829] Add the ability to sort PLT entries

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18829

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Greg Bentley from comment #5)
> (In reply to Alexander Monakov from comment #3)
> > As I understand, for further benefit you should sort the GOT as well as PLT
> > based on the same idea — and that will save you some dcache misses even with
> > -fno-plt.
> 
> That's correct. However, I didn't see a noticeable difference with my
> workload from improving the GOT cache behavior. My previous patch resulted
> in sorted GOTs except when -z bndplt was used. I've fixed that in the patch
> just uploaded.

I want to avoid adding changes like that unless GCC -fno-plt
option isn't sufficient.

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