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Re: [PATCH] RTL docs update


"Seongbae Park (박성배, 朴成培)" <seongbae.park@gmail.com> writes:

> Index: rtl.def
> ===================================================================
> --- rtl.def	(revision 126222)
> +++ rtl.def	(working copy)
> @@ -212,8 +212,15 @@ DEF_RTL_EXPR(ASM_OPERANDS, "asm_operands
>       operations is to be performed.
>     (Note that the vector must be the first operand because of the way that
>     genrecog.c record positions within an insn.)
> -   This can occur all by itself in a PATTERN, as a component of a PARALLEL,
> -   or inside an expression.  */
> +
> +   UNSPEC can occur all by itself in a PATTERN, as a component of a PARALLEL,
> +   or inside an expression.  
> +   UNSPEC by itself or as a component of a PARALLEL
> +   is currently considered not deletable.
> +
> +   FIXME: Replace all uses of UNSPEC that appears by itself or as a component
> +   of a PARALLEL with USE.
> +   */


It occurs to me that we may want to put some or all of this in
doc/rtl.texi.

Ian


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