6b7b0ab530
Enables adding instrumentation to pass manager that can track/flag invariants. This would be useful for cases where one some tighter requirements than the general dialects or for a phase of conversion that elsewhere. It would enable making verify also just a regular instrumentation I believe, but also a non-goal as that is a first class concept and baseline for the ops and passes. Would have enabled some of the requirements of https://discourse.llvm.org/t/pre-verification-logic-before-running-conversion-pass-in-mlir/88318/10 .
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