Move list logic out from out_val
Memory fixes/retains for out_val:s
v_save_regs()
Correct type in x86_64 impl_call()
impl_reg_savable() for v_save_regs()
More detailed out_val leak checks
v_dup_or_reuse() dup-case releases the from value
Free local_args in x86_64 impl_call()
Fixed function argument ordering