[cfe-commits] [Patch 4 of 5] Proposed fix for PR12850

[Andy Gibbs]

Hi,

Attached here is the fourth of five patches for PR12850.

This patch makes some alterations to VerifyDiagnosticConsumer (it seems I
cannot leave it alone!) which are there to enable test-cases to check on
the performance of the cache.  An additional -verify directive, namely

  verify-fncache-stats

is supported which generates a diagnostic note to the user or test-case
which details the number of cache hits, the number of cached entries and
the memory consumption (approximate).  This can be matched then with an
appropriate "expected-note" in a test-case.

I don't know whether people think this is a good way to achieve this,
but I was looking for a way to particularly have the hits/count as part
of test-cases to ensure no unintended performance regressions, and this
seemed the best approach.

I would welcome alternatives if this is not the way to do it.

Cheers
Andy

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