[llvm] r262384 - TableGen: Check scheduling models for completeness

[Matthias Braun via llvm-commits]

Ok I can add that.

Though in many cases you can easily piece some scheduling information together with existing SchedWrite/SchedRead classes and do not have to modify all the scheduling models.

- Matthias

> On Mar 1, 2016, at 1:19 PM, Tim Northover via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> Hi Matthias,
> 
>> +          PrintError("No schedule information for instruction '"
>> +                     + Inst->TheDef->getName() + "'");
> 
> I think this needs a better diagnostic. The most common way this will
> be hit is when some poor sucker is trying to test out a new
> instruction and suddenly discovers he needs to mark it unsupported on
> umpteen schedulers before LLVM will even compile his code.
> 
> I'd suggest explicitly calling out hasNoSchedulingInfo as a temporary
> development fix.
> 
> Cheers.
> 
> Tim.
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