[RFC] RTL prologue/epilogue for SPARC

[Eric Botcazou]

> This is a first attempt at implementing RTL prologue/epilogue on SPARC, at
> least partially.  I wrote it a few months ago, after David had proposed
> the idea.  It has passsed bootstrap/regtest on sparc-sun-solaris2.8
> and sparc64-sun-solaris2.9 on mainline today.

I commited it to mainline and opened http://gcc.gnu.org/PR16294 to track the 
delay slot scheduling regression.

-- 
Eric Botcazou