[GCC 6] PATCH: Backport -mindirect-branch= patches

[H.J. Lu]

On Mon, Mar 19, 2018 at 10:00 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Thu, Mar 15, 2018 at 1:00 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
>> On Thu, Mar 15, 2018 at 12:54 PM, Jan Hubicka <hubicka@ucw.cz> wrote:
>>>> On Thu, Mar 15, 2018 at 10:47 AM, Jan Hubicka <hubicka@ucw.cz> wrote:
>>>> >> On Thu, Mar 15, 2018 at 9:03 AM, Jan Hubicka <hubicka@ucw.cz> wrote:
>>>> >> >> > What is the reason for using different names for return and indirect thunks at first place?
>>>> >> >> >
>>>> >> >>
>>>> >> >> These 2 thunks are identical.  But one may want to provide an
>>>> >> >> alternate thunk only for
>>>> >> >> indirect branch and leaves return thunk alone.  You can't do that if
>>>> >> >> both have the same
>>>> >> >> name.
>>>> >> >
>>>> >> > Hmm, OK, what is the benefit to have two different thunks? It is just
>>>> >> > safety precaution so we could adjust one without adjusting the other in
>>>> >> > future?
>>>> >> >
>>>> >>
>>>> >> That is correct.
>>>> >
>>>> > Hmm, I guess the patch is OK. Things are slightly more flexible this way and
>>>> > duplicating thunk is not terribly expensive. One can always link with
>>>> > non-comdat+ alias.
>>>> >
>>>>
>>>> That is true.  OK to backport to GCC 7 after a few days?
>>> OK.  I suppose you are testing return thunks on some real environment, like GCC bootstrap :)
>>
>> Yes.
>>
>
> I checked my backport into GCC 7 branch.
>
> Here are GCC 6 patches to backport all -mindirect-branch= patches.
> OK for GCC 6.
>

Resend the patches compressed with xz.  Sorry if you get the patches twice.


-- 
H.J.
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