[all-commits] [llvm/llvm-project] 477b5b: [flang][OpenMP] Upstream first part of `do concurr...

[Kareem Ergawy via All-commits]

  Branch: refs/heads/users/ergawy/upstream_do_concurrent_2
  Home:   https://github.com/llvm/llvm-project
  Commit: 477b5b8d22ddd7b0a873519c8cc16b0e4a3c81ca
      https://github.com/llvm/llvm-project/commit/477b5b8d22ddd7b0a873519c8cc16b0e4a3c81ca
  Author: ergawy <kareem.ergawy at amd.com>
  Date:   2025-02-17 (Mon, 17 Feb 2025)

  Changed paths:
    M clang/include/clang/Driver/Options.td
    M clang/lib/Driver/ToolChains/Flang.cpp
    A flang/docs/DoConcurrentConversionToOpenMP.md
    M flang/docs/index.md
    M flang/include/flang/Frontend/CodeGenOptions.def
    M flang/include/flang/Frontend/CodeGenOptions.h
    M flang/include/flang/Optimizer/OpenMP/Passes.h
    M flang/include/flang/Optimizer/OpenMP/Passes.td
    A flang/include/flang/Optimizer/OpenMP/Utils.h
    M flang/include/flang/Optimizer/Passes/Pipelines.h
    M flang/lib/Frontend/CompilerInvocation.cpp
    M flang/lib/Frontend/FrontendActions.cpp
    M flang/lib/Optimizer/OpenMP/CMakeLists.txt
    A flang/lib/Optimizer/OpenMP/DoConcurrentConversion.cpp
    M flang/lib/Optimizer/Passes/Pipelines.cpp
    A flang/test/Driver/do_concurrent_to_omp_cli.f90
    A flang/test/Transforms/DoConcurrent/basic_host.f90
    M flang/tools/bbc/bbc.cpp

  Log Message:
  -----------
  [flang][OpenMP] Upstream first part of `do concurrent` mapping

This PR starts the effort to upstream AMD's internal implementation of
`do concurrent` to OpenMP mapping. This replaces #77285 since we
extended this WIP quite a bit on our fork over the past year.

An important part of this PR is a document that describes the current
status downstream, the upstreaming status, and next steps to make this
pass much more useful.

In addition to this document, this PR also contains the skeleton of the
pass (no useful transformations are done yet) and some testing for the
added command line options.


  Commit: 57e10a4232b577a32b314715381019449a07ba86
      https://github.com/llvm/llvm-project/commit/57e10a4232b577a32b314715381019449a07ba86
  Author: ergawy <kareem.ergawy at amd.com>
  Date:   2025-02-17 (Mon, 17 Feb 2025)

  Changed paths:
    M flang/docs/DoConcurrentConversionToOpenMP.md
    M flang/lib/Optimizer/OpenMP/DoConcurrentConversion.cpp
    A flang/test/Transforms/DoConcurrent/loop_nest_test.f90

  Log Message:
  -----------
  [flang][OpenMP] Upstream `do concurrent` loop-nest detection.

Upstreams the next part of `do concurrent` to OpenMP mapping pass (from
AMD's ROCm implementation). See #126026 for more context.

This PR add loop nest detection logic. This enables us to discover
muli-range `do concurrent` loops and then map them as "collapsed" loop
nests to OpenMP.


Compare: https://github.com/llvm/llvm-project/compare/477b5b8d22dd%5E...57e10a4232b5

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