[all-commits] [llvm/llvm-project] e97e0a: [AbstractAttributor] Fold __kmpc_parallel_level if...

[Shilei Tian via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e97e0a4fad091474131ad84d6f46009bf84c5b60
      https://github.com/llvm/llvm-project/commit/e97e0a4fad091474131ad84d6f46009bf84c5b60
  Author: Shilei Tian <tianshilei1992 at gmail.com>
  Date:   2021-07-26 (Mon, 26 Jul 2021)

  Changed paths:
    M llvm/lib/Transforms/IPO/OpenMPOpt.cpp
    A llvm/test/Transforms/OpenMP/parallel_level_fold.ll
    M openmp/libomptarget/deviceRTLs/common/src/parallel.cu
    M openmp/libomptarget/deviceRTLs/interface.h

  Log Message:
  -----------
  [AbstractAttributor] Fold __kmpc_parallel_level if possible

Similar to D105787, this patch tries to fold `__kmpc_parallel_level` if possible.
Note that `__kmpc_parallel_level` doesn't take activeness into consideration,
based on current `deviceRTLs`, its return value can be such as 0, 1, 2, instead
of 0, 129, 130, etc. that also indicate activeness.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D106154