GCC 6 backports

[Martin Liška]

On 04/25/2018 03:16 PM, Jan Hubicka wrote:
>> Hi.
>>
>> Sending GCC 6 branch backports.
>> Patches can bootstrap on ppc64le-redhat-linux and survives regression tests.
>> I'm going to install the patches.
>>
>> Martin
> 
>> >From e0d32b1f9e0dd0486e63040e1ab8f5d8e9f0fbd5 Mon Sep 17 00:00:00 2001
>> From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
>> Date: Tue, 10 Apr 2018 07:24:59 +0000
>> Subject: [PATCH 1/4] Backport r259265
>>
>> gcc/lto/ChangeLog:
>>
>> 2018-04-10  Richard Biener  <rguenther@suse.de>
>> 	    Martin Liska  <mliska@suse.cz>
>>
>> 	PR lto/85248
>> 	* lto-symtab.c (lto_symtab_merge_p): Handle noreturn attribute.
> 
> Support for syntactic duplicates was new at that time and several
> changes was made later. So enabling more of them may lead to troubles.
> Did you test that this works for Firefox build?

No, but I've just tested Libreoffice build w/ LTO and it's successfully built.

Martin

> 
> Honza
>