Felix Schneider 2a603deec4 [mlir][Python] Fix conversion of non-zero offset memrefs to np.arrays ...

Memref descriptors contain an `offset` field that denotes the start of
the content of the memref relative to the `alignedPtr`. This offset is
not considered when converting a memref descriptor to a np.array in the
Python runtime library, essentially treating all memrefs as if they had
an offset of zero. This patch introduces the necessary pointer arithmetic
to find the actual beginning of the memref contents to the memref->numpy
conversion functions.

There is an ongoing discussion about whether the `offset` field is needed
at all in the memref descriptor.
Until that is decided, the Python runtime and CRunnerUtils should
still correctly implement the offset handling.

Related: https://reviews.llvm.org/D157008

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D158494

2023-09-05 08:02:59 +00:00

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