[Mlir-commits] [mlir] [mlir][mpi] Lowering Mpi To LLVM (PR #127053)

[Frank Schlimbach]

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@@ -0,0 +1,157 @@
+#define MPICH_SKIP_MPICXX 1
+#define OMPI_SKIP_MPICXX 1
+#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
+#include "mlir/Dialect/MPI/IR/MPI.h"
+#include "mlir/Transforms/DialectConversion.h"
+
+// skip if no MPI C header was found
+#ifdef FOUND_MPI_C_HEADER
+#include <mpi.h>
+#else // not FOUND_MPI_C_HEADER
+#include "mpi_fallback.h"
+#endif // FOUND_MPI_C_HEADER
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fschlimb wrote:

I am not aware of a tangible plan. Probably mostly because no concrete suggestion was made yet. 
I'd be happy to work with you on that, but I suggest doing this in a separate PR.

Notice: Even though not ideal, the current default/fallback approach works for all the MPICH compatible MPI implementations (https://www.mpich.org/abi/).

https://github.com/llvm/llvm-project/pull/127053