[Mlir-commits] [mlir] [mlir][mesh, mpi] Lower allreduce (PR #144060)

[Christian Ulmann]

================
@@ -207,17 +207,27 @@ createCollectiveProcessGroupSize(MeshOp mesh, ArrayRef<MeshAxis> axes,
       builder.getIndexType()));
 }
 
-TypedValue<IndexType> createProcessLinearIndex(StringRef mesh,
-                                               ArrayRef<MeshAxis> meshAxes,
-                                               ImplicitLocOpBuilder &builder) {
-  ResultRange processInGroupMultiIndex =
-      builder.create<ProcessMultiIndexOp>(mesh, meshAxes).getResults();
+TypedValue<IndexType>
+createProcessLinearIndex(StringRef mesh, ValueRange processInGroupMultiIndex,
+                         ArrayRef<MeshAxis> meshAxes,
+                         ImplicitLocOpBuilder &builder) {
   Operation::result_range processGroupShape =
       builder.create<MeshShapeOp>(mesh, meshAxes).getResult();
   OpFoldResult processInGroupLinearIndex = affine::linearizeIndex(
       llvm::to_vector_of<OpFoldResult>(processInGroupMultiIndex),
       llvm::to_vector_of<OpFoldResult>(processGroupShape), builder);
-  return cast<TypedValue<IndexType>>(cast<Value>(processInGroupLinearIndex));
+  Value res = dyn_cast<Value>(processInGroupLinearIndex);
----------------
Dinistro wrote:

```suggestion
  auto res = dyn_cast<Value>(processInGroupLinearIndex);
```

https://github.com/llvm/llvm-project/pull/144060