[all-commits] [llvm/llvm-project] 345338: [Flang][MLIR][OpenMP] Add explicit shared memory (...

[Sergio Afonso via All-commits]

  Branch: refs/heads/users/skatrak/flang-generic-09-sharedmem-ops
  Home:   https://github.com/llvm/llvm-project
  Commit: 34533893a8241a6d7a8a46b650c9244eb6d6f8fa
      https://github.com/llvm/llvm-project/commit/34533893a8241a6d7a8a46b650c9244eb6d6f8fa
  Author: Sergio Afonso <safonsof at amd.com>
  Date:   2026-04-27 (Mon, 27 Apr 2026)

  Changed paths:
    M llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h
    M llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp
    M mlir/include/mlir/Dialect/OpenMP/OpenMPClauses.td
    M mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
    M mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
    M mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
    M mlir/test/Dialect/OpenMP/invalid.mlir
    M mlir/test/Dialect/OpenMP/ops.mlir
    A mlir/test/Target/LLVMIR/omptarget-device-shared-mem.mlir

  Log Message:
  -----------
  [Flang][MLIR][OpenMP] Add explicit shared memory (de-)allocation ops

This patch introduces the `omp.alloc_shared_mem` and `omp.free_shared_mem`
operations to represent explicit allocations and deallocations of shared memory
across threads in a team, mirroring the existing `omp.target_allocmem` and
`omp.target_freemem`.

The `omp.alloc_shared_mem` op goes through the same Flang-specific
transformations as `omp.target_allocmem`, so that the size of the buffer can be
properly calculated when translating to LLVM IR.

The corresponding runtime functions produced for these new operations are
`__kmpc_alloc_shared` and `__kmpc_free_shared`, which previously could only be
created for implicit allocations (e.g. privatized and reduction variables).



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