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Subject: [Bug target/46208] TARGET_PROMOTE_PROTOTYPES for SPARC V8
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46208

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ebotcazou at gcc dot
                   |                            |gnu.org

--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2010-10-28 10:57:12 UTC ---
> we modified the function *TARGET_PROMOTE_PROTOTYPES
> *(http://goo.gl/2pQQ) and set it to the default value which is FALSE.
> 
> static bool
> sparc_promote_prototypes (const_tree fntype ATTRIBUTE_UNUSED)
> {
>   return TARGET_ARCH32 ? true : false;
> }
> 
> was replaced by
> 
> static bool
> sparc_promote_prototypes (const_tree fntype ATTRIBUTE_UNUSED)
> {
>   return false;
> }

This will result in violations of the ABI without further changes (garbage in
the upper part of the argument registers).  You need the patch I'm about to
attach as a minimum, but it cannot eliminate the extensions in the caller
alone, more work is required in the back-end.  At which point changing
TARGET_PROMOTE_PROTOTYPES will probably have only a marginal effect.