X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllvm-as%2Fllvm-as.cpp;h=c1661cdcb196e7f9e35613b611814aa3c91901c8;hb=63a8dae64dea89ae4a6f93ee17cf3fbbc2815084;hp=7bea711826e57c4b5ce0c8c3db87cb5b4058c05e;hpb=06272dcfb277367caddb578fb7f0e1cade8c00e5;p=oota-llvm.git diff --git a/tools/llvm-as/llvm-as.cpp b/tools/llvm-as/llvm-as.cpp index 7bea711826e..c1661cdcb19 100644 --- a/tools/llvm-as/llvm-as.cpp +++ b/tools/llvm-as/llvm-as.cpp @@ -1,90 +1,119 @@ -//===------------------------------------------------------------------------=== -// 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. +// 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/LLVMContext.h" #include "llvm/Module.h" #include "llvm/Assembly/Parser.h" -#include "llvm/Bytecode/Writer.h" -#include "Support/CommandLine.h" -#include -#include +#include "llvm/Analysis/Verifier.h" +#include "llvm/Bitcode/ReaderWriter.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/SourceMgr.h" +#include "llvm/Support/SystemUtils.h" +#include "llvm/Support/ToolOutputFile.h" +#include "llvm/Support/Signals.h" #include +using namespace llvm; -cl::String InputFilename ("", "Parse file, compile to bytecode", 0, "-"); -cl::String OutputFilename("o", "Override output filename", cl::NoFlags, ""); -cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false); -cl::Flag DumpAsm ("d", "Print assembly as parsed", cl::Hidden, false); +static cl::opt +InputFilename(cl::Positional, cl::desc(""), cl::init("-")); -int main(int argc, char **argv) { - cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n"); - - ostream *Out = 0; - try { - // Parse the file now... - std::auto_ptr M(ParseAssemblyFile(InputFilename)); - if (M.get() == 0) { - cerr << "assembly didn't read correctly.\n"; - return 1; - } - - if (DumpAsm) { - cerr << "Here's the assembly:\n"; - M.get()->dump(); - } +static cl::opt +OutputFilename("o", cl::desc("Override output filename"), + cl::value_desc("filename")); - 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 << "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 +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 +DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden); + +static cl::opt +DisableVerify("disable-verify", cl::Hidden, + cl::desc("Do not run verifier on input LLVM (dangerous!)")); + +static void WriteOutputFile(const Module *M) { + // Infer the output filename if needed. + if (OutputFilename.empty()) { + if (InputFilename == "-") { + OutputFilename = "-"; } else { - if (InputFilename == "-") { - OutputFilename = "-"; - Out = &cout; + 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 { - 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 << "Error opening '" << OutputFilename << "': File exists!\n" - << "Use -f command line argument to force output\n"; - return 1; - } - - Out = new std::ofstream(OutputFilename.c_str()); + OutputFilename = IFN; // Append a .bc to it } + OutputFilename += ".bc"; } - - if (!Out->good()) { - cerr << "Error opening " << OutputFilename << "!\n"; + } + + std::string ErrorInfo; + OwningPtr Out + (new tool_output_file(OutputFilename.c_str(), ErrorInfo, + raw_fd_ostream::F_Binary)); + if (!ErrorInfo.empty()) { + errs() << ErrorInfo << '\n'; + exit(1); + } + + if (Force || !CheckBitcodeOutputToConsole(Out->os(), true)) + WriteBitcodeToFile(M, Out->os()); + + // 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::auto_ptr M(ParseAssemblyFile(InputFilename, Err, Context)); + if (M.get() == 0) { + Err.Print(argv[0], errs()); + return 1; + } + + if (!DisableVerify) { + std::string Err; + if (verifyModule(*M.get(), ReturnStatusAction, &Err)) { + errs() << argv[0] + << ": assembly parsed, but does not verify as correct!\n"; + errs() << Err; return 1; } - - WriteBytecodeToFile(M.get(), *Out); - } catch (const ParseException &E) { - cerr << E.getMessage() << endl; - return 1; } - if (Out != &cout) delete Out; + if (DumpAsm) errs() << "Here's the assembly:\n" << *M.get(); + + if (!DisableOutput) + WriteOutputFile(M.get()); + return 0; } -