gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ]
}
gn analyze input:
{
  "files": [
    "//llvm/lib/Support/ELFAttrParserExtended.cpp",
    "//llvm/test/tools/llvm-readobj/ELF/AArch64/build-attributes-melformed-long.s",
    "//llvm/test/tools/llvm-readobj/ELF/AArch64/build-attributes-melformed-short.s",
    "//llvm/test/tools/llvm-readobj/ELF/AArch64/build-attributes-melformed-type.s",
    "//llvm/test/tools/llvm-readobj/ELF/AArch64/build-attributes-melformed-values.s",
    "//llvm/test/tools/llvm-readobj/ELF/AArch64/build-attributes-melformed-ver.s"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}