6bb1cadd56
that builds the following additional llvm/clang tools: - bugpoint - llc - lli - llvm-ar - llvm-as - llvm-bcanalyzer - llvm-diff - llvm-dis - llvm-extract - llvm-ld - llvm-link - llvm-mc - llvm-nm - llvm-objdump - llvm-prof - llvm-ranlib - llvm-rtdyld - llvm-stub - macho-dump - opt These tools are mainly useful for people that want to manipulate llvm bitcode (.bc) and llvm assembly language (.ll) files, or want to tinker with llvm and clang themselves. MFC after: 2 weeks
143 lines
4.5 KiB
C++
143 lines
4.5 KiB
C++
//===- llvm-link.cpp - Low-level LLVM linker ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This utility may be invoked in the following manner:
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// llvm-link a.bc b.bc c.bc -o x.bc
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Linker.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Support/SystemUtils.h"
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#include "llvm/Support/IRReader.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/Path.h"
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#include <memory>
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using namespace llvm;
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static cl::list<std::string>
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InputFilenames(cl::Positional, cl::OneOrMore,
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cl::desc("<input bitcode files>"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"), cl::init("-"),
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cl::value_desc("filename"));
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static cl::opt<bool>
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Force("f", cl::desc("Enable binary output on terminals"));
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static cl::opt<bool>
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OutputAssembly("S",
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cl::desc("Write output as LLVM assembly"), cl::Hidden);
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static cl::opt<bool>
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Verbose("v", cl::desc("Print information about actions taken"));
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static cl::opt<bool>
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DumpAsm("d", cl::desc("Print assembly as linked"), cl::Hidden);
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// LoadFile - Read the specified bitcode file in and return it. This routine
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// searches the link path for the specified file to try to find it...
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//
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static inline std::auto_ptr<Module> LoadFile(const char *argv0,
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const std::string &FN,
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LLVMContext& Context) {
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sys::Path Filename;
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if (!Filename.set(FN)) {
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errs() << "Invalid file name: '" << FN << "'\n";
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return std::auto_ptr<Module>();
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}
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SMDiagnostic Err;
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if (Verbose) errs() << "Loading '" << Filename.c_str() << "'\n";
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Module* Result = 0;
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const std::string &FNStr = Filename.str();
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Result = ParseIRFile(FNStr, Err, Context);
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if (Result) return std::auto_ptr<Module>(Result); // Load successful!
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Err.Print(argv0, errs());
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return std::auto_ptr<Module>();
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}
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int main(int argc, char **argv) {
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// Print a stack trace if we signal out.
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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LLVMContext &Context = getGlobalContext();
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");
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unsigned BaseArg = 0;
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std::string ErrorMessage;
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std::auto_ptr<Module> Composite(LoadFile(argv[0],
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InputFilenames[BaseArg], Context));
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if (Composite.get() == 0) {
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errs() << argv[0] << ": error loading file '"
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<< InputFilenames[BaseArg] << "'\n";
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return 1;
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}
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for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
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std::auto_ptr<Module> M(LoadFile(argv[0],
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InputFilenames[i], Context));
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if (M.get() == 0) {
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errs() << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
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return 1;
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}
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if (Verbose) errs() << "Linking in '" << InputFilenames[i] << "'\n";
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if (Linker::LinkModules(Composite.get(), M.get(), Linker::DestroySource,
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&ErrorMessage)) {
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errs() << argv[0] << ": link error in '" << InputFilenames[i]
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<< "': " << ErrorMessage << "\n";
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return 1;
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}
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}
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// TODO: Iterate over the -l list and link in any modules containing
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// global symbols that have not been resolved so far.
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if (DumpAsm) errs() << "Here's the assembly:\n" << *Composite;
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std::string ErrorInfo;
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tool_output_file Out(OutputFilename.c_str(), ErrorInfo,
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raw_fd_ostream::F_Binary);
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if (!ErrorInfo.empty()) {
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errs() << ErrorInfo << '\n';
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return 1;
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}
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if (verifyModule(*Composite)) {
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errs() << argv[0] << ": linked module is broken!\n";
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return 1;
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}
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if (Verbose) errs() << "Writing bitcode...\n";
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if (OutputAssembly) {
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Out.os() << *Composite;
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} else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
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WriteBitcodeToFile(Composite.get(), Out.os());
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// Declare success.
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Out.keep();
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return 0;
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}
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