[gold] enable sorting of text sections with the same prefix

[Alexander Ivchenko]

Hello Sri,

thank you for your input!
Please, look at
http://sourceware.org/bugzilla/show_bug.cgi?id=14948

thank you,
Alexander

2013/1/29 Sriraman Tallam <tmsriram@google.com>:
> Hi,
>
> On Tue, Jan 29, 2013 at 7:28 AM, Alexander Ivchenko <aivchenk@gmail.com> wrote:
>> Hi,
>>
>>    This patch to gold: http://sourceware.org/ml/binutils/2013-01/msg00335.html
>> disabled sorting of text sections with the same prefix like
>> .text.hot0001, .text.hot0002
>> which is very desirable.
>
> Sorting by section names in general for text sections turns out to be
> a bad idea as we have seen many performance issues. That is the reason
> why the patch you reference was created.
>
> The reason why some text sections are grouped to begin with is to
> mimic the default GNU ld behaviour. I dont think GNU ld  groups these
> two sections.  AFAIK, ".text.hot." is the prefix for hot text
> sections. How were these two sections you mention created?Which
> compiler is generating these two sections? Or, did you explicitly use
> a section attribute?
>
> Thanks
> Sri
>
> The attached patch fix this.
>>
>> OK for trunk?
>>
>> thank you,
>> Alexander