[flang] [llvm] [mlir] [MLIR][OpenMP] Add MLIR Lowering Support for dist_schedule (PR #152736)

Thu Nov 27 06:26:53 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-arm64-windows-msvc` running on `linaro-armv8-windows-msvc-01` while building `flang,llvm,mlir` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/207/builds/10223

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
1 warning generated.
8.000 [1016/10/15] Building CXX object lib/Object/CMakeFiles/LLVMObject.dir/IRSymtab.cpp.obj
8.291 [1015/10/16] Linking CXX static library lib\LLVMObject.lib
9.300 [1014/10/17] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Version.cpp.obj
9.526 [1013/10/18] Building CXX object lib/Frontend/OpenMP/CMakeFiles/LLVMFrontendOpenMP.dir/OMP.cpp.obj
10.579 [1012/10/19] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/OpenMPKinds.cpp.obj
11.765 [1011/10/20] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTDiagnostic.cpp.obj
19.770 [1010/10/21] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTTypeTraits.cpp.obj
23.962 [1009/10/22] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTStructuralEquivalence.cpp.obj
25.872 [1008/10/23] Building CXX object tools/mlir/lib/Dialect/OpenMP/CMakeFiles/obj.MLIROpenMPDialect.dir/IR/OpenMPDialect.cpp.obj
FAILED: tools/mlir/lib/Dialect/OpenMP/CMakeFiles/obj.MLIROpenMPDialect.dir/IR/OpenMPDialect.cpp.obj 
C:\Users\tcwg\scoop\shims\ccache.exe C:\Users\tcwg\scoop\apps\llvm-arm64\current\bin\clang-cl.exe  /nologo -TP -DGTEST_HAS_RTTI=0 -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/build/tools/mlir/lib/Dialect/OpenMP -IC:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/lib/Dialect/OpenMP -IC:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/build/tools/mlir/include -IC:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include -IC:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/build/include -IC:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/llvm/include /DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Oi /Brepro /bigobj /permissive- -Werror=unguarded-availability-new /W4  -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported /Gw -Wundef -Werror=mismatched-tags -Werror=global-constructors /O2 /Ob2  -std:c++17 -MD  /EHs-c- /GR- -UNDEBUG /showIncludes /Fotools/mlir/lib/Dialect/OpenMP/CMakeFiles/obj.MLIROpenMPDialect.dir/IR/OpenMPDialect.cpp.obj /Fdtools\mlir\lib\Dialect\OpenMP\CMakeFiles\obj.MLIROpenMPDialect.dir\ -c -- C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp:13:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Dialect/OpenMP/OpenMPDialect.h:16:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Dialect/LLVMIR/LLVMDialect.h:17:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Bytecode/BytecodeOpInterface.h:17:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Bytecode/BytecodeImplementation.h:19:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/Dialect.h:17:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/OperationSupport.h:19:
C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/BuiltinAttributes.h(359,14): warning: 'complex' is deprecated: warning STL4037: The effect of instantiating the template std::complex for any type other than float, double, or long double is unspecified. You can define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING to suppress this warning. [-Wdeprecated-declarations]
  359 |       return {APFloat(*smt, value.real()), APFloat(*smt, value.imag())};
      |              ^
c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.39.33519\include\complex(1315,5): note: 'complex' has been explicitly marked deprecated here
 1315 |     _DEPRECATE_NONFLOATING_COMPLEX
      |     ^
c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.39.33519\include\yvals_core.h(1450,7): note: expanded from macro '_DEPRECATE_NONFLOATING_COMPLEX'
 1450 |     [[deprecated("warning STL4037: "                                                   \
      |       ^
C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp(620,28): error: no member named 'Distribute' in 'mlir::omp::ClauseScheduleKind'
  620 |   case ClauseScheduleKind::Distribute:
      |        ~~~~~~~~~~~~~~~~~~~~^
1 warning and 1 error generated.
26.889 [1008/9/24] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/AttrDocTable.cpp.obj
27.186 [1008/8/25] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTDumper.cpp.obj
27.562 [1008/7/26] Building CXX object tools/mlir/lib/Target/LLVMIR/CMakeFiles/obj.MLIRTargetLLVMIRExport.dir/ModuleTranslation.cpp.obj
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp:14:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Target/LLVMIR/ModuleTranslation.h:17:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Dialect/LLVMIR/LLVMInterfaces.h:16:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Dialect/LLVMIR/LLVMAttrs.h:17:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Dialect/LLVMIR/LLVMTypes.h:18:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/Interfaces/DataLayoutInterfaces.h:20:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/OpDefinition.h:22:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/Dialect.h:17:
In file included from C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/OperationSupport.h:19:
C:/Users/tcwg/llvm-worker/flang-arm64-windows-msvc/llvm-project/mlir/include\mlir/IR/BuiltinAttributes.h(359,14): warning: 'complex' is deprecated: warning STL4037: The effect of instantiating the template std::complex for any type other than float, double, or long double is unspecified. You can define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING to suppress this warning. [-Wdeprecated-declarations]
  359 |       return {APFloat(*smt, value.real()), APFloat(*smt, value.imag())};
      |              ^
c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.39.33519\include\complex(1315,5): note: 'complex' has been explicitly marked deprecated here
 1315 |     _DEPRECATE_NONFLOATING_COMPLEX

```

</details>

https://github.com/llvm/llvm-project/pull/152736