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

[Frank Schlimbach]

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@@ -529,6 +519,124 @@ struct ConvertShardShapeOp : public OpConversionPattern<ShardShapeOp> {
   }
 };
 
+static mpi::MPI_OpClassEnumAttr getMPIReduction(ReductionKindAttr kind) {
+  auto ctx = kind.getContext();
+  switch (kind.getValue()) {
+  case ReductionKind::Sum:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_SUM);
+  case ReductionKind::Product:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_PROD);
+  case ReductionKind::Min:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_MIN);
+  case ReductionKind::Max:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_MAX);
+  case ReductionKind::BitwiseAnd:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_BAND);
+  case ReductionKind::BitwiseOr:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_BOR);
+  case ReductionKind::BitwiseXor:
+    return mpi::MPI_OpClassEnumAttr::get(ctx, mpi::MPI_OpClassEnum::MPI_BXOR);
+  default:
+    assert(false && "Unknown/unsupported reduction kind");
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fschlimb wrote:

I'll keep it. Compiler checks can be disabled.

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