[PATCH] Create thunks before regular relocation scan.

[Rui Ueyama via llvm-commits]

Can you upload it to reviews.llvm.org? (Since I'm working with a chromebook
this week it is hard to review it in a patch locally.)

On Wed, Jul 20, 2016 at 11:26 AM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> Rebased patch attached.
>
> On 20 July 2016 at 11:12, Rafael Espíndola <rafael.espindola at gmail.com>
> wrote:
> > We will need to do something like this to support range extension
> > thunks since that process is iterative.
> >
> > Doing this also has the advantage that when doing the regular
> > relocation scan the offset in the output section is known and we can
> > just store that. This reduces the number of times we have to run
> > getOffset and I think will allow a more specialized .eh_frame
> > representation.
> >
> > By itself this is already a performance win.
> >
> > firefox
> >   master 7.295045737
> >   patch  7.209466989 0.98826892235
> > chromium
> >   master 4.531254468
> >   patch  4.509221804 0.995137623774
> > chromium fast
> >   master 1.836928973
> >   patch  1.823805241 0.992855612714
> > the gold plugin
> >   master 0.379768791
> >   patch  0.380043405 1.00072310839
> > clang
> >   master 0.642698284
> >   patch  0.642215663 0.999249070657
> > llvm-as
> >   master 0.036665467
> >   patch  0.036456225 0.994293213284
> > the gold plugin fsds
> >   master 0.40395817
> >   patch  0.404384555 1.0010555177
> > clang fsds
> >   master 0.722045545
> >   patch  0.720946135 0.998477367518
> > llvm-as fsds
> >   master 0.03292646
> >   patch  0.032759965 0.994943428477
> > scylla
> >   master 3.427376378
> >   patch  3.368316181 0.98276810292
> >
> >
> > Cheers,
> > Rafael
>
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