gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang/lib/Lower/OpenMP/PrivateReductionUtils.cpp",
    "//flang/lib/Lower/OpenMP/PrivateReductionUtils.h",
    "//flang/lib/Lower/OpenMP/ReductionProcessor.cpp",
    "//flang/test/Lower/OpenMP/parallel-reduction-allocatable-array.f90",
    "//flang/test/Lower/OpenMP/parallel-reduction-array-lb.f90",
    "//flang/test/Lower/OpenMP/parallel-reduction-array.f90",
    "//flang/test/Lower/OpenMP/parallel-reduction-array2.f90",
    "//flang/test/Lower/OpenMP/parallel-reduction-pointer-array.f90",
    "//flang/test/Lower/OpenMP/parallel-reduction3.f90",
    "//flang/test/Lower/OpenMP/reduction-array-intrinsic.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-allocatable-array-minmax.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-array-assumed-shape.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-array-lb.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-array-lb2.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-array.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-array2.f90",
    "//flang/test/Lower/OpenMP/wsloop-reduction-multiple-clauses.f90",
    "//llvm/utils/gn/secondary/bolt/lib/Passes/BUILD.gn",
    "//llvm/utils/gn/secondary/clang/lib/CodeGen/BUILD.gn",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/lldb/tools/lldb-dap/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/MCTargetDesc/BUILD.gn"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}
running all tests due to change to blacklisted file