X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllvm-as%2Fllvm-as.cpp;h=d4e4d8d71070a4557400107810432600d249a5fc;hb=ce6f743e65a8ff84ebb5c7527a794b192f05bc87;hp=7593cef4b0f125b21ce197a0866bfef7490c4e76;hpb=d4c7f2766bcf2cf87e562ea4e71cb4b54d81b74e;p=oota-llvm.git diff --git a/tools/llvm-as/llvm-as.cpp b/tools/llvm-as/llvm-as.cpp index 7593cef4b0f..d4e4d8d7107 100644 --- a/tools/llvm-as/llvm-as.cpp +++ b/tools/llvm-as/llvm-as.cpp @@ -1,102 +1,124 @@ -//===------------------------------------------------------------------------=== -// LLVM 'AS' UTILITY +//===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// // // This utility may be invoked in the following manner: -// as --help - Output information about command line switches -// as [options] - Read LLVM assembly from stdin, write bytecode to stdout -// as [options] x.ll - Read LLVM assembly from the x.ll file, write bytecode -// to the x.bc file. -// -//===------------------------------------------------------------------------=== - -#include "llvm/Module.h" -#include "llvm/Assembly/Parser.h" -#include "llvm/Bytecode/Writer.h" -#include "Support/CommandLine.h" -#include "Support/Signals.h" -#include +// llvm-as --help - Output information about command line switches +// llvm-as [options] - Read LLVM asm from stdin, write bitcode to stdout +// llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bitcode +// to the x.bc file. +// +//===----------------------------------------------------------------------===// + +#include "llvm/IR/LLVMContext.h" +#include "llvm/AsmParser/Parser.h" +#include "llvm/Bitcode/ReaderWriter.h" +#include "llvm/IR/Module.h" +#include "llvm/IR/Verifier.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/Signals.h" +#include "llvm/Support/SourceMgr.h" +#include "llvm/Support/SystemUtils.h" +#include "llvm/Support/ToolOutputFile.h" #include -using std::cerr; -using std::string; +using namespace llvm; -static cl::opt +static cl::opt InputFilename(cl::Positional, cl::desc(""), cl::init("-")); -static cl::opt +static cl::opt OutputFilename("o", cl::desc("Override output filename"), cl::value_desc("filename")); static cl::opt -Force("f", cl::desc("Overwrite output files")); +Force("f", cl::desc("Enable binary output on terminals")); + +static cl::opt +DisableOutput("disable-output", cl::desc("Disable output"), cl::init(false)); + +static cl::opt +EmitFunctionSummary("function-summary", cl::desc("Emit function summary index"), + cl::init(false)); static cl::opt DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden); -int main(int argc, char **argv) { - cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n"); - - std::ostream *Out = 0; - try { - // Parse the file now... - std::auto_ptr M(ParseAssemblyFile(InputFilename)); - if (M.get() == 0) { - cerr << argv[0] << ": assembly didn't read correctly.\n"; - return 1; - } - - if (DumpAsm) cerr << "Here's the assembly:\n" << M.get(); - - if (OutputFilename != "") { // Specified an output filename? - if (!Force && std::ifstream(OutputFilename.c_str())) { - // If force is not specified, make sure not to overwrite a file! - cerr << argv[0] << ": error opening '" << OutputFilename - << "': file exists!\n" - << "Use -f command line argument to force output\n"; - return 1; - } - Out = new std::ofstream(OutputFilename.c_str()); +static cl::opt +DisableVerify("disable-verify", cl::Hidden, + cl::desc("Do not run verifier on input LLVM (dangerous!)")); + +static cl::opt PreserveBitcodeUseListOrder( + "preserve-bc-uselistorder", + cl::desc("Preserve use-list order when writing LLVM bitcode."), + cl::init(true), cl::Hidden); + +static void WriteOutputFile(const Module *M) { + // Infer the output filename if needed. + if (OutputFilename.empty()) { + if (InputFilename == "-") { + OutputFilename = "-"; } else { - if (InputFilename == "-") { - OutputFilename = "-"; - Out = &std::cout; - } else { - std::string IFN = InputFilename; - int Len = IFN.length(); - if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') { - // Source ends in .ll - OutputFilename = std::string(IFN.begin(), IFN.end()-3); - } else { - OutputFilename = IFN; // Append a .bc to it - } - OutputFilename += ".bc"; - - if (!Force && std::ifstream(OutputFilename.c_str())) { - // If force is not specified, make sure not to overwrite a file! - cerr << argv[0] << ": error opening '" << OutputFilename - << "': file exists!\n" - << "Use -f command line argument to force output\n"; - return 1; - } - - Out = new std::ofstream(OutputFilename.c_str()); - // Make sure that the Out file gets unlink'd from the disk if we get a - // SIGINT - RemoveFileOnSignal(OutputFilename); - } + StringRef IFN = InputFilename; + OutputFilename = (IFN.endswith(".ll") ? IFN.drop_back(3) : IFN).str(); + OutputFilename += ".bc"; } - - if (!Out->good()) { - cerr << argv[0] << ": error opening " << OutputFilename << "!\n"; + } + + std::error_code EC; + std::unique_ptr Out( + new tool_output_file(OutputFilename, EC, sys::fs::F_None)); + if (EC) { + errs() << EC.message() << '\n'; + exit(1); + } + + if (Force || !CheckBitcodeOutputToConsole(Out->os(), true)) + WriteBitcodeToFile(M, Out->os(), PreserveBitcodeUseListOrder, + EmitFunctionSummary); + + // Declare success. + Out->keep(); +} + +int main(int argc, char **argv) { + // Print a stack trace if we signal out. + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + LLVMContext &Context = getGlobalContext(); + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + cl::ParseCommandLineOptions(argc, argv, "llvm .ll -> .bc assembler\n"); + + // Parse the file now... + SMDiagnostic Err; + std::unique_ptr M = parseAssemblyFile(InputFilename, Err, Context); + if (!M.get()) { + Err.print(argv[0], errs()); + return 1; + } + + if (!DisableVerify) { + std::string ErrorStr; + raw_string_ostream OS(ErrorStr); + if (verifyModule(*M.get(), &OS)) { + errs() << argv[0] + << ": assembly parsed, but does not verify as correct!\n"; + errs() << OS.str(); return 1; } - - WriteBytecodeToFile(M.get(), *Out); - } catch (const ParseException &E) { - cerr << argv[0] << ": " << E.getMessage() << "\n"; - return 1; } - if (Out != &std::cout) delete Out; + if (DumpAsm) errs() << "Here's the assembly:\n" << *M.get(); + + if (!DisableOutput) + WriteOutputFile(M.get()); + return 0; } -