Re: Question about sibling call epilogues & registers

[Daniel Santos]

I think I've finally found the problem. It would appear that if you do 
not explicitly add a note of type REG_CALL_DECL that specifies the 
function declaration then it will ignore whatever you've supplied with 
add_function_usage_to().  Instead, it will replace it with the target's 
default register clobber value which is almost everything: 
regs_invalidated_by_call is a macro defined in hard-reg-set.h and 
expands to (this_target_hard_regs->x_regs_invalidated_by_call).

So it would seem that I need some type of function declaration.
Daniel