target/6882: [SPARC] Useless stack adjustment code

[Eric Botcazou]

> Now you're arguing about the *value of the optimization*.
> I was arguing about *closing the PR for the wrong reason*.

Well, you only asked me to give a specific reason for the adjustment code.
I agreed that there appears to be no compelling reason for it. But the 
problem is that the code is emitted anyway. So IMHO the right question is 
rather: are there strong enough reasons for removing it? Therefore I gave my 
opinion on this latter question.

> Having said that, let's continue to the *new* discussion.  You
> can't optimize out the call from other translation units.  Not
> being a SPARC maintainer I won't try to judge on the benefit,
> but it looks simple enough and seems worthwhile.  C++ tends to
> generate a lot of small trivial functions.

Maybe. My impression is that, if the optimization was that simple and that 
worthwhile, it would already have been implemented. But I'm not a SPARC 
maintainer either, so...

-- 
Eric Botcazou