patch: powerpc CALL_REALLY_USED_REGISTERS

[Richard Henderson]

On Wed, Nov 28, 2001 at 08:27:22PM -0800, Stan Shebs wrote:
> FWIW, Motorola's code for this has a vrsave_save_p flag in stack
> frame info, and tests it to decide whether to add an explicit clobber
> to call insns.

Err, how does that help?  We _already_ consider VRSAVE clobbered
at call instructions.  The problem is that it _isn't_ clobbered,
and we want the compiler to know that.


r~