[wwwdocs] Update changes.html for LTO and IPA

Gerald Pfeifer gerald@pfeifer.com
Sat Mar 4 15:26:00 GMT 2017

On Tue, 28 Feb 2017, Jan Hubicka wrote:
>> And one question: "declaration linking" is used in the description
>> of Link-time optimization improvements, alas that string does not 
>> appear anywhere in either the source tree or documentation?
> It is my own name indeed. lto-symtab.c does merge declarations
> when they refer to same symbol name. Newly we do not merge when 
> the symbol names does not appear semantically similar enough.
> We can also call it declaration merging, but it is internal name 
> anyway and most link-time optimization papers reffer to these merging 
> processes as linking.

Thanks for the explanation, Honza.

In that case, I guess leave it as is unless someone else wants to
see this changed.

As another note, "declaration merging" once occurs in our codebase,
in varpool.c:

      /* When doing declaration merging we have duplicate
         entries for given decl.  Do not attempt to remove
         the boides, or we will end up remiving
         wrong one.  */

Should this read "Do not attempt to address this, or we risk removing
the wrong one" or something like that?


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