[all-commits] [llvm/llvm-project] f8ee04: [OpenMP] Eliminate the ThreadStates array in favor...

[Johannes Doerfert via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f8ee045c6d934f64bcdab6c9fb4fc5c36c33938f
      https://github.com/llvm/llvm-project/commit/f8ee045c6d934f64bcdab6c9fb4fc5c36c33938f
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2022-10-04 (Tue, 04 Oct 2022)

  Changed paths:
    M openmp/libomptarget/DeviceRTL/include/State.h
    M openmp/libomptarget/DeviceRTL/include/Types.h
    M openmp/libomptarget/DeviceRTL/src/State.cpp

  Log Message:
  -----------
  [OpenMP] Eliminate the ThreadStates array in favor of indirection

If we have thread states, the program is going to be rather slow. If we
don't, we want to avoid wasting shared memory. This patch introduces a
slight penalty (malloc + indirection) for the slow path and reduces
resource usage for the fast path.

Differential Revision: https://reviews.llvm.org/D135037