[all-commits] [llvm/llvm-project] 994bb6: [OpenMP][NFC] Provide a new remark and documentation

[Johannes Doerfert via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 994bb6eb7d01db1d9461e54d17a63af2ba1af2c9
      https://github.com/llvm/llvm-project/commit/994bb6eb7d01db1d9461e54d17a63af2ba1af2c9
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2020-12-17 (Thu, 17 Dec 2020)

  Changed paths:
    M clang/test/OpenMP/remarks_parallel_in_multiple_target_state_machines.c
    M clang/test/OpenMP/remarks_parallel_in_target_state_machine.c
    M llvm/lib/Transforms/IPO/OpenMPOpt.cpp
    M openmp/docs/remarks/OptimizationRemarks.rst

  Log Message:
  -----------
  [OpenMP][NFC] Provide a new remark and documentation

If a GPU function is externally reachable we give up trying to find the
(unique) kernel it is called from. This can hinder optimizations. Emit a
remark and explain mitigation strategies.

Reviewed By: tianshilei1992

Differential Revision: https://reviews.llvm.org/D93439