Re: [Patch] Document __builtin_extend_pointer

[Jeff Law <law@redhat.com>]

On 02/20/2018 10:33 AM, Steve Ellcey wrote:
> While working on PR 83335 I proposed a change to a test case that
> used __builtin_extend_pointer and Richared Earnshaw pointed out
> that this builtin is not documented.  Since I could not find any
> other (reasonable) way to generate an extended address in inline
> assembly other than this builtin I would like to document it for
> use.
> 
> Here is a proposed patch, the one problem I found was the return
> type of the builtin.  I don't know how to describe it other than
> Pmode, but that is not a user visible type.
> 
> See https://gcc.gnu.org/ml/gcc-patches/2018-02/msg01051.html
> for my PR 83335 patch and follow up comments.
> 
> Should I go ahead and add this documentation?
> 
> 
> 2018-02-20  Steve Ellcey  <sellcey@cavium.com>
> 
> 	* doc/extend.texi (__builtin_extend_pointer): Document builtin.
I'd change "is different than" to "is smaller than".  It's kind of
implied in the name, but I think it's slightly clearer.

With that.  OK.

jeff

ps.  You might ping Richard Sandiford on the actual patch that fixes
83335.  It looks like it's been waiting for over a month.