Re: target/6882: [SPARC] Useless stack adjustment code

[Eric Botcazou <ebotcazou at libertysurf dot fr>]

The following reply was made to PR target/6882; it has been noted by GNATS.

From: Eric Botcazou <ebotcazou at libertysurf dot fr>
To: Hans-Peter Nilsson <hp at bitrange dot com>
Cc: <dann at godzilla dot ics dot uci dot edu>,
 <gcc-bugs at gcc dot gnu dot org>,
 <nobody at gcc dot gnu dot org>,
 <gcc-gnats at gcc dot gnu dot org>
Subject: Re: target/6882: [SPARC] Useless stack adjustment code
Date: Mon, 31 Mar 2003 09:37:25 +0200

 > No, it seems a valid optimization request to not emit the
 > stack-adjustment code.  Could you find a *specific* reason for
 > the stack-adjustment code?  (Please state that in the PR.)
 
 No, I don't see a "specific" reason. But:
 - functions from the same translation unit that call it (and that appear 
 after it in normal mode, but the restriction is lifted with 
 -funit-at-a-time) don't actually emit the call,
 - would the benefit be worth it in real life, given that the costly operation 
 is to call the function itself (for nothing)? I think the real optimization 
 is not to emit the call at all.
 
 -- 
 Eric Botcazou