tree 12ce14fb1ba0fcf02b799da174875ff00b137710
parent bbb6f0170731679d690cee002be712f2d703b8fe
author Jonathan Peyton <jonathan.l.peyton@intel.com> 1551386841 +0000
committer Jonathan Peyton <jonathan.l.peyton@intel.com> 1551386841 +0000

[OpenMP 5.0] Deprecate nest-var and associated features

Nest-var, OMP_NESTED, omp_set_nested()., and omp_get_nested() have been
deprecated in the 5.0 spec. Initial nesting info is now derived from
OMP_MAX_ACTIVE_LEVELS, OMP_NUM_THREADS, and OMP_PROC_BIND.

This patch deprecates the internal ICV that corresponds to nest-var, and
replaces it with the max-active-levels-var ICV to determine nesting. The
change still allows for use of OMP_NESTED (according to 5.0 changes),
omp_get_nested, and omp_set_nested, which have had deprecation messages
added to them. The change allows certain settings of OMP_NUM_THREADS,
OMP_PROC_BIND, and OMP_MAX_ACTIVE_LEVELS to turn on nesting, but
OMP_NESTED=0 will still force nesting to be off.

The runtime now prints informative messages about deprecation of
OMP_NESTED, omp_set_nested(), and omp_get_nested(), when those
environment variables or routines are used. It also prints deprecated
message in output for KMP_SETTINGS and OMP_DISPLAY_ENV for OMP_NESTED.
This patch also fixes OMP_DISPLAY_ENV output for OMP_TARGET_OFFLOAD.

Patch by Terry Wilmarth

Differential Revision: https://reviews.llvm.org/D58408


git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@355138 91177308-0d34-0410-b5e6-96231b3b80d8