[llvm] [mlir] [mlir][mesh] Add all-scatter operation (PR #81218)

[Boian Petkantchin via llvm-commits]

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@@ -309,6 +311,11 @@ DivModValue getDivMod(OpBuilder &b, Location loc, Value lhs, Value rhs);
 FailureOr<SmallVector<Value>> delinearizeIndex(OpBuilder &b, Location loc,
                                                Value linearIndex,
                                                ArrayRef<Value> basis);
+// Generate IR that extracts the linear index form a multi-index according to
+// a shape.
+OpFoldResult linearIndexFromShape(ArrayRef<OpFoldResult> multiIndex,
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sogartar wrote:

I renamed it. `delinearizeIndex` above it is uses shape/basis as well. I changed the argument to basis for consistency.
There is another function `computeLinearIndex` in indexing utils that uses stride instead of basis.

https://github.com/llvm/llvm-project/pull/81218