Re: Another issue on RS6000 target. Re: One issue with default implementation of zero_call_used_regs

[Qing Zhao via Gcc-patches]

> 
> Going back to the default hook, I guess one option is:
> 
>   rtx zero = CONST0_RTX (reg_raw_mode[regno]);
>   rtx_insn *insn = emit_insn (gen_rtx_SET (regno_reg_rtx[regno], zero));
>   if (!valid_insn_p (insn))
>     sorry (…);

“Sorry” here will tell the user that the implementation on this platform is not 
valid?

Qing
> 
> but with some mechanism to avoid spewing the user with messages
> for the same problem.
> 
> Thanks,
> Richard