[Flang][OpenMP] Skip intermediate map generation for motion modifier map directives (#177737) Currently if we create the following map: !$omp target update from/to(derived_type%allocatable) We'll generate an extra map for the derived type (and any other allocatable maps that may be in-between the final mapped allocatable member). However, for cases like this, and other motion modifier related map directives we don't need to do so. All the user cares about is the specified member. Removing the intermediate member will minimize extra performance overhead. It also maintains correctness, as currently, the MLIR diagnostics for the motion modifiers restricts possible map types for updates to to and from, and applying this map type to an intermediate map will result in unintended side affects, e.g. mapping back data the user didn't want to or over-writing data they didn't intend to on device. This minor modification addresses that.
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