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[MLIR][Flang] Prevent CSE and constant materialization from crossing some OpenMP region boundaries #229

Merged
merged 4 commits into from
Sep 11, 2023
Merged

[MLIR][Flang] Prevent CSE and constant materialization from crossing some OpenMP region boundaries #229

merged 4 commits into from
Sep 11, 2023

Commits on Sep 11, 2023

  1. [MLIR] Allow dialects to disable CSE for certain operations 

    This patch adds the `DialectCSEInterface`, which dialects can implement and register to prevent the common sub-expression elimination (CSE) pass from modifying regions of certain operations.

The result is that these operations would be treated by CSE as if they were `IsolatedFromAbove`, but without the restrictions that come with that trait.

Differential Revision: https://reviews.llvm.org/D159212
    @skatrak
    skatrak committed Sep 11, 2023
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  2. [MLIR][OpenMP] Prevent CSE and constant materialization from crossing… 

    … some OpenMP region boundaries

Operations this patch prevents constants and common subexpressions being
extracted from:
  - omp.target
  - omp.teams
  - omp.parallel
    @skatrak
    skatrak committed Sep 11, 2023
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  3. Fix unit tests

    @skatrak
    skatrak committed Sep 11, 2023
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  4. Add omp.distribute to list of ops not to be crossed

    @skatrak
    skatrak committed Sep 11, 2023
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