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[MLIR][Flang] Add placeholder for omp.distribute and lowering #230
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This patch adds a placeholder definition of the `omp.distribute` MLIR operation intended as a way to unblock progress in the lowering to LLVM IR of the constructs needed for milestone2 (`target teams distribute parallel do`). Eventually this simple definition would be replaced by a complete one coming from the trunk, with support for clauses and designed to work together with the `omp.canonical_loop`. Code written based on this definition should hopefully still work when the definition is completed.
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This patch adds a placeholder definition of the
omp.distributeMLIR operation intended as a way to unblock progress in the lowering to LLVM IR of the constructs needed for milestone2 (target teams distribute parallel do). It also includes lowering from parse tree to MLIR.Eventually this simple definition would be replaced by a complete one coming from the trunk, with support for clauses and designed to work together with the
omp.canonical_loop. Code written based on this definition should hopefully still work when the definition is completed.