[llvm] [TableGen] Sort matchables depending on predicates. (PR #84483)

[Alfie Richards via llvm-commits]

AlfieRichardsArm wrote:

Yeah I agree the issue is probably actually the sort not being the same on the different builds. And youre right I think relying on the names is a bad idea.

> Can you compare two versions of ARMGenAsmMatcher.inc that cause different behavior? 
I agree I think the real issue is why has this non-determinism creaped in that wasn't here previously. I will have a look at trying to compare these on Monday. It is quite frustrating to debug as it doesn't reliably repreoduce  on my machine.

> Did you try `HasPositionOrder` of the Instruction `TableGen` class?
Ah I hadn't considered this. This would work well. I will abandon this patch and use that if the sort can't be figured out.

https://github.com/llvm/llvm-project/pull/84483