1 //===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
10 //   llvm-as --help         - Output information about command line switches
11 //   llvm-as [options]      - Read LLVM asm from stdin, write bitcode to stdout
12 //   llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bitcode
15 //===----------------------------------------------------------------------===//
33 cl::OptionCategory AsCat("llvm-as Options");
37                                           cl::init("-"));
47 static cl::opt<bool> DisableOutput("disable-output", cl::desc("Disable output"),
50 static cl::opt<bool> EmitModuleHash("module-hash", cl::desc("Emit module hash"),
57     DisableVerify("disable-verify", cl::Hidden,
62     "preserve-bc-uselistorder",
63     cl::desc("Preserve use-list order when writing LLVM bitcode."),
66 static cl::opt<std::string> ClDataLayout("data-layout",
68                                          cl::value_desc("layout-string"),
75   if (OutputFilename.empty()) {  in WriteOutputFile()
76     if (InputFilename == "-") {  in WriteOutputFile()
77       OutputFilename = "-";  in WriteOutputFile()
93   if (Force || !CheckBitcodeOutputToConsole(Out->os())) {  in WriteOutputFile()
96     // has non-zero flags. The latter is used to assemble dummy index files for  in WriteOutputFile()
97     // skipping modules by distributed ThinLTO backends. Otherwise we get an empty  in WriteOutputFile()
99     if (Index && (Index->begin() != Index->end() || Index->getFlags()))  in WriteOutputFile()
101     if (!IndexToWrite || (M && (!M->empty() || !M->global_empty())))  in WriteOutputFile()
102       // If we have a non-empty Module, then we write the Module plus  in WriteOutputFile()
103       // any non-null Index along with it as a per-module Index.  in WriteOutputFile()
104       // If both are empty, this will give an empty module block, which is  in WriteOutputFile()
106       WriteBitcodeToFile(*M, Out->os(), PreserveBitcodeUseListOrder,  in WriteOutputFile()
109       // Otherwise, with an empty Module but non-empty Index, we write a  in WriteOutputFile()
111       writeIndexToFile(*IndexToWrite, Out->os());  in WriteOutputFile()
115   Out->keep();  in WriteOutputFile()
121   cl::ParseCommandLineOptions(argc, argv, "llvm .ll -> .bc assembler\n");  in main()
126   auto SetDataLayout = [](StringRef, StringRef) -> std::optional<std::string> {  in main()
127     if (ClDataLayout.empty())  in main()
146   M->setIsNewDbgInfoFormat(UseNewDbgInfoFormat &&  in main()
148   if (M->IsNewDbgInfoFormat)  in main()
149     M->removeDebugIntrinsicDeclarations();  in main()
167     if (Index.get() && Index->begin() != Index->end())  in main()
168       Index->print(errs());  in main()