[PATCH] rtx_writer: avoid printing trailing default values

[Bernd Schmidt]

On 11/04/2016 08:14 PM, David Malcolm wrote:
>
> With this, compact dumps omit the trailing (nil) for both regular insns
> and for JUMP_INSNs, and omits the surplus newline seen in my earlier patch.
>
> It also appears removes the trailing (nil) from expr_list.
>
> Bootstrap&regrtest in progress.
>
> OK for trunk if it passes?

This seems OK, with something left to be addressed perhaps in a followup:

> +	case JUMP_INSN:
> +	  return JUMP_LABEL (in_rtx) == NULL_RTX;

Weren't we going to omit JUMP_LABELs in compact mode? If so, we'll need 
a m_compact test here eventually as well.


Bernd