[all-commits] [llvm/llvm-project] bb0166: [libomptarget] Update device pointer only if needed

[George Rokos via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bb0166dc72791e2cefdb0c8dc9e495ea0555357b
      https://github.com/llvm/llvm-project/commit/bb0166dc72791e2cefdb0c8dc9e495ea0555357b
  Author: George Rokos <georgios.rokos at intel.com>
  Date:   2021-07-13 (Tue, 13 Jul 2021)

  Changed paths:
    M openmp/libomptarget/src/omptarget.cpp
    A openmp/libomptarget/test/mapping/device_ptr_update.c

  Log Message:
  -----------
  [libomptarget] Update device pointer only if needed

Currently, libomptarget will always perform a host-to-device memory transfer in
order to update the device pointer of a PTR_AND_OBJ entry. This is not always
necessary because the device pointer may have been set to the correct pointee
address already, so we can eliminate the redundant memory transfer.