Lei Zhang 6f28fd0bf7 [mlir][vector] Fold 1-element reduction into extract or arith ops
If there is only one single element in the vector, then we can
just extract the element to compute the final result.

Reviewed By: mravishankar

Differential Revision: https://reviews.llvm.org/D124129
2022-04-22 14:24:46 -04:00
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