[Flang][OpenMP] Implement "promotion" of use_device_ptr non-cptr arguments to use_device_addr (#82834)

This effectively implements some now deprecated OpenMP functionality
that some applications (most notably at the moment GenASiS)
unfortunately depend on (deprecated in specification version 5.2):

"If a list item in a use_device_ptr clause is not of type C_PTR, the
behavior is as if the list item appeared in a use_device_addr clause.
Support for such list items in a use_device_ptr clause is deprecated."

This PR downgrades the hard-error to a deprecated warning and "promotes"
the above cases by simply moving the offending operands from the
use_device_ptr value list to the back of the use_device_addr list (and
moves the related symbols, locs and types that form the BlockArgs
correspondingly) and then the generation of the target data construct
proceeds as normal.

GitOrigin-RevId: 096ee4e16fd62cd578d20ec4e8ad4756f4e369ee
4 files changed
tree: c0ede57cd67449c93993fc56ad0efae0c42380a4
  1. cmake/
  2. docs/
  3. examples/
  4. include/
  5. lib/
  6. module/
  7. runtime/
  8. test/
  9. tools/
  10. unittests/
  11. .clang-format
  12. .clang-tidy
  13. .drone.star
  14. .gitignore
  15. CMakeLists.txt
  16. CODE_OWNERS.TXT
  17. LICENSE.TXT
  18. README.md
README.md

Flang

Flang is a ground-up implementation of a Fortran front end written in modern C++. It started off as the f18 project (https://github.com/flang-compiler/f18) with an aim to replace the previous flang project (https://github.com/flang-compiler/flang) and address its various deficiencies. F18 was subsequently accepted into the LLVM project and rechristened as Flang.

Please note that flang is not ready yet for production usage.

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Read more about flang in the docs directory. Start with the compiler overview.

To better understand Fortran as a language and the specific grammar accepted by flang, read Fortran For C Programmers and flang's specifications of the Fortran grammar and the OpenMP grammar.

Treatment of language extensions is covered in this document.

To understand the compilers handling of intrinsics, see the discussion of intrinsics.

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Consult the Getting Started with Flang for information on building and running flang.