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Diffstat (limited to 'tools/llvm-as/llvm-as.cpp')
-rw-r--r-- | tools/llvm-as/llvm-as.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/tools/llvm-as/llvm-as.cpp b/tools/llvm-as/llvm-as.cpp new file mode 100644 index 0000000..79ece8f --- /dev/null +++ b/tools/llvm-as/llvm-as.cpp @@ -0,0 +1,149 @@ +//===--- 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: +// 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/Module.h" +#include "llvm/Assembly/Parser.h" +#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/Streams.h" +#include "llvm/Support/SystemUtils.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/System/Signals.h" +#include <fstream> +#include <iostream> +#include <memory> +using namespace llvm; + +static cl::opt<std::string> +InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-")); + +static cl::opt<std::string> +OutputFilename("o", cl::desc("Override output filename"), + cl::value_desc("filename")); + +static cl::opt<bool> +Force("f", cl::desc("Overwrite output files")); + +static cl::opt<bool> +DisableOutput("disable-output", cl::desc("Disable output"), cl::init(false)); + +static cl::opt<bool> +DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden); + +static cl::opt<bool> +DisableVerify("disable-verify", cl::Hidden, + cl::desc("Do not run verifier on input LLVM (dangerous!)")); + +int main(int argc, char **argv) { + // Print a stack trace if we signal out. + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + cl::ParseCommandLineOptions(argc, argv, "llvm .ll -> .bc assembler\n"); + + int exitCode = 0; + std::ostream *Out = 0; + try { + // Parse the file now... + ParseError Err; + std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename, Err)); + if (M.get() == 0) { + Err.PrintError(argv[0], errs()); + return 1; + } + + if (!DisableVerify) { + std::string Err; + if (verifyModule(*M.get(), ReturnStatusAction, &Err)) { + cerr << argv[0] + << ": assembly parsed, but does not verify as correct!\n"; + cerr << Err; + return 1; + } + } + + if (DumpAsm) cerr << "Here's the assembly:\n" << *M.get(); + + if (OutputFilename != "") { // Specified an output filename? + if (OutputFilename != "-") { // Not stdout? + 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(), std::ios::out | + std::ios::trunc | std::ios::binary); + } else { // Specified stdout + // FIXME: cout is not binary! + Out = &std::cout; + } + } 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(), std::ios::out | + std::ios::trunc | std::ios::binary); + // Make sure that the Out file gets unlinked from the disk if we get a + // SIGINT + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + } + } + + if (!Out->good()) { + cerr << argv[0] << ": error opening " << OutputFilename << "!\n"; + return 1; + } + + if (!DisableOutput) + if (Force || !CheckBitcodeOutputToConsole(Out,true)) + WriteBitcodeToFile(M.get(), *Out); + } catch (const std::string& msg) { + cerr << argv[0] << ": " << msg << "\n"; + exitCode = 1; + } catch (...) { + cerr << argv[0] << ": Unexpected unknown exception occurred.\n"; + exitCode = 1; + } + + if (Out != &std::cout) delete Out; + return exitCode; +} + |