[PATCH] D30135: [OpenMP] Generate better diagnostics for cancel and cancellation point

[Jonas Hahnfeld via Phabricator via cfe-commits]

Hahnfeld created this revision.

Handle errors related to a specific directive before checking the nesting:
The specific checks may validate required arguments and give more helpful
messages, especially when the nesting depends on those arguments.

This change requires some minor adaptions to the tests to maintain the
expected diagnostics.


https://reviews.llvm.org/D30135

Files:
  lib/Sema/SemaOpenMP.cpp
  test/OpenMP/cancel_messages.cpp
  test/OpenMP/cancellation_point_messages.cpp
  test/OpenMP/nesting_of_regions.cpp
  test/OpenMP/task_messages.cpp

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