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Re: Use predicates for RTL objects
On 8/8/19 11:06 AM, Arvind Sankar wrote:
> On Thu, Aug 08, 2019 at 08:31:28AM -0600, Jeff Law wrote:
>> True, but they could be. When David was working in this space a few
>> years ago I concluded that the main value in sub-classing the various
>> RTL operators just wansn't worth the effort. Instead we focused on
>> starting to tear apart things like the toplevel objects into rtx_insn
>> and the like. THere's little value in treating those as simple RTXs.
>> INSN_LIST and the like were also ripe for this treatment.
>> The biggest value in making a real class for the operators things would
>> be to move the runtime RTL checking into a compile-time check. But I
>> couldn't really green light something like that without first completing
>> the rtx_insn changes.
> Are there any notes or old discussion threads on what remains? I would
> be interested in taking a look if no-one else is.
I don't recall if that discussion was internal or external. If the
latter, then it'd be in the gcc-patches archives.