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[MLIR][OpenMP] Update loop operations to use omp.loopnest #43

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[MLIR][OpenMP] Update loop operations to use omp.loopnest #43

wants to merge 1 commit into from

Commits on Mar 13, 2024

  1. [MLIR][OpenMP] Update loop operations to use omp.loopnest 

    This patch updates the definition of all OpenMP loop operations
(`omp.distribute`, `omp.parallel`, `omp.wsloop`, `omp.simdloop`,
`omp.taskloop`) to expect a nested `omp.loopnest` and act as wrapper operations
instead.

Loop information is removed from these operations and their list of traits is
updated to include a new common `LoopWrapperInterface`, as well as introducing
`SingleBlockImplicitTerminator` traits to all but `omp.parallel`, which can be
a wrapper in composite constructs but also define a regular code block.

These changes make it so wrapper operations can only have a single region and
block, and that it must only have a single compatible wrapper operation or
canonical loop in addition to a terminator.

Follow-up patches will update PFT to MLIR lowering to generate MLIR conforming
to these new definitions for loops.
    @skatrak
    skatrak committed Mar 13, 2024
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