Matthias Springer 4c4ab673f1 [mlir][Analysis][NFC] Split FlatAffineConstraints class ...

* Extract "value" functionality of `FlatAffineConstraints` into a new derived `FlatAffineValueConstraints` class. Current users of `FlatAffineConstraints` can use `FlatAffineValueConstraints` without additional code changes, thus NFC.
* `FlatAffineConstraints` no longer associates dimensions with SSA Values. All functionality that requires this, is moved to `FlatAffineValueConstraints`.
* `FlatAffineConstraints` no longer makes assumptions about where Values associated with dimensions are coming from.

Differential Revision: https://reviews.llvm.org/D107725

2021-08-17 10:09:17 +09:00

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