[all-commits] [llvm/llvm-project] 9a48bf: [flang][OpenMP] Allocate `reduction` init temps on...

Kareem Ergawy via All-commits all-commits at lists.llvm.org
Wed Jul 2 21:29:56 PDT 2025


  Branch: refs/heads/users/ergawy/reduction_init_temps_on_stack
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a48bff311756ff1c3703f33d6acaecee195fe1e
      https://github.com/llvm/llvm-project/commit/9a48bff311756ff1c3703f33d6acaecee195fe1e
  Author: ergawy <kareem.ergawy at amd.com>
  Date:   2025-07-02 (Wed, 02 Jul 2025)

  Changed paths:
    M flang/lib/Lower/Support/PrivateReductionUtils.cpp
    M flang/test/Lower/OpenMP/parallel-reduction-array.f90

  Log Message:
  -----------
  [flang][OpenMP] Allocate `reduction` init temps on the stack for GPUs

Temps needed for the reduction init regions are now allocate on the heap
all the time. However, this is performance killer for GPUs since malloc
calls are prohibitively expensive. Therefore, we should do these
allocations on the stack for GPU reductions.


  Commit: c3777c9566273740206705d1c91262eca9995e02
      https://github.com/llvm/llvm-project/commit/c3777c9566273740206705d1c91262eca9995e02
  Author: ergawy <kareem.ergawy at amd.com>
  Date:   2025-07-02 (Wed, 02 Jul 2025)

  Changed paths:
    M mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp

  Log Message:
  -----------
  add todo


Compare: https://github.com/llvm/llvm-project/compare/1f7d4677265e...c3777c956627

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