[llvm] Make a tablegen test match-table.td more robust. (PR #106508)

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MaggieYingYi wrote:

Thanks Pierre for the quick review the patch.

> I think the best solution would be to have some Python script to update these tests easily. Failing that, maybe a CL opt for TableGen to emit a more testable match-table (for instance, one that omits all of the indexes) ?
>

Could you please show me an existing example? I could look at it and try to use the python script for the test?

Thanks,


https://github.com/llvm/llvm-project/pull/106508