+//===- llvm-link.cpp - Low-level LLVM linker ------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
-// LLVM 'LINK' UTILITY
//
// This utility may be invoked in the following manner:
-// link a.bc b.bc c.bc -o x.bc
-//
-// Alternatively, this can be used as an 'ar' tool as well. If invoked as
-// either 'ar' or 'llvm-ar', it accepts a 'rc' parameter as well.
+// llvm-link a.bc b.bc c.bc -o x.bc
//
//===----------------------------------------------------------------------===//
-#include "llvm/Transforms/Utils/Linker.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/Writer.h"
-#include "llvm/Module.h"
-#include "Support/CommandLine.h"
-#include "Support/Signals.h"
-#include <fstream>
+#include "llvm/Linker/Linker.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Path.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 <memory>
-#include <sys/types.h> // For FileExists
-#include <sys/stat.h>
-#include <iostream>
-
-using std::cerr;
-
-cl::StringList InputFilenames("", "Load <arg> files, linking them together",
- cl::OneOrMore);
-cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "-");
-cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
-cl::Flag Verbose ("v", "Print information about actions taken");
-cl::Flag DumpAsm ("d", "Print assembly as linked", cl::Hidden, false);
-cl::StringList LibPaths ("L", "Specify a library search path", cl::ZeroOrMore);
-
-// FileExists - Return true if the specified string is an openable file...
-static inline bool FileExists(const std::string &FN) {
- struct stat StatBuf;
- return stat(FN.c_str(), &StatBuf) != -1;
-}
+using namespace llvm;
-// LoadFile - Read the specified bytecode file in and return it. This routine
-// searches the link path for the specified file to try to find it...
-//
-static inline std::auto_ptr<Module> LoadFile(const std::string &FN) {
- std::string Filename = FN;
- std::string ErrorMessage;
+static cl::list<std::string>
+InputFilenames(cl::Positional, cl::OneOrMore,
+ cl::desc("<input bitcode files>"));
- unsigned NextLibPathIdx = 0;
- bool FoundAFile = false;
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"), cl::init("-"),
+ cl::value_desc("filename"));
- while (1) {
- if (Verbose) cerr << "Loading '" << Filename << "'\n";
- if (FileExists(Filename)) FoundAFile = true;
- Module *Result = ParseBytecodeFile(Filename, &ErrorMessage);
- if (Result) return std::auto_ptr<Module>(Result); // Load successful!
+static cl::opt<bool>
+Force("f", cl::desc("Enable binary output on terminals"));
- if (Verbose) {
- cerr << "Error opening bytecode file: '" << Filename << "'";
- if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
- cerr << "\n";
- }
-
- if (NextLibPathIdx == LibPaths.size()) break;
- Filename = LibPaths[NextLibPathIdx++] + "/" + FN;
- }
+static cl::opt<bool>
+OutputAssembly("S",
+ cl::desc("Write output as LLVM assembly"), cl::Hidden);
- if (FoundAFile)
- cerr << "Bytecode file '" << FN << "' corrupt! "
- << "Use 'link -v ...' for more info.\n";
- else
- cerr << "Could not locate bytecode file: '" << FN << "'\n";
- return std::auto_ptr<Module>();
-}
+static cl::opt<bool>
+Verbose("v", cl::desc("Print information about actions taken"));
+
+static cl::opt<bool>
+DumpAsm("d", cl::desc("Print assembly as linked"), cl::Hidden);
+
+static cl::opt<bool>
+SuppressWarnings("suppress-warnings", cl::desc("Suppress all linking warnings"),
+ cl::init(false));
+// LoadFile - Read the specified bitcode file in and return it. This routine
+// searches the link path for the specified file to try to find it...
+//
+static inline Module *LoadFile(const char *argv0, const std::string &FN,
+ LLVMContext& Context) {
+ SMDiagnostic Err;
+ if (Verbose) errs() << "Loading '" << FN << "'\n";
+ Module* Result = nullptr;
+ Result = ParseIRFile(FN, Err, Context);
+ if (Result) return Result; // Load successful!
+ Err.print(argv0, errs());
+ return nullptr;
+}
int main(int argc, char **argv) {
- cl::ParseCommandLineOptions(argc, argv, " llvm linker\n",
- cl::EnableSingleLetterArgValue |
- cl::DisableSingleLetterArgGrouping);
- assert(InputFilenames.size() > 0 && "OneOrMore is not working");
+ // 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 linker\n");
unsigned BaseArg = 0;
std::string ErrorMessage;
- // TODO: TEST argv[0] for llvm-ar forms... for now, this is a huge hack.
- if (InputFilenames.size() >= 3 && InputFilenames[0] == "rc" &&
- OutputFilename == "-") {
- BaseArg = 2;
- OutputFilename = InputFilenames[1];
+ std::unique_ptr<Module> Composite(
+ LoadFile(argv[0], InputFilenames[BaseArg], Context));
+ if (!Composite.get()) {
+ errs() << argv[0] << ": error loading file '"
+ << InputFilenames[BaseArg] << "'\n";
+ return 1;
}
- std::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg]));
- if (Composite.get() == 0) return 1;
-
+ Linker L(Composite.get(), SuppressWarnings);
for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
- std::auto_ptr<Module> M(LoadFile(InputFilenames[i]));
- if (M.get() == 0) return 1;
+ std::unique_ptr<Module> M(LoadFile(argv[0], InputFilenames[i], Context));
+ if (!M.get()) {
+ errs() << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
+ return 1;
+ }
- if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
+ if (Verbose) errs() << "Linking in '" << InputFilenames[i] << "'\n";
- if (LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
- cerr << "Error linking in '" << InputFilenames[i] << "': "
- << ErrorMessage << "\n";
+ if (L.linkInModule(M.get(), &ErrorMessage)) {
+ errs() << argv[0] << ": link error in '" << InputFilenames[i]
+ << "': " << ErrorMessage << "\n";
return 1;
}
}
- if (DumpAsm) cerr << "Here's the assembly:\n" << Composite.get();
+ if (DumpAsm) errs() << "Here's the assembly:\n" << *Composite;
- std::ostream *Out = &std::cout; // Default to printing to stdout...
- if (OutputFilename != "-") {
- 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());
- if (!Out->good()) {
- cerr << "Error opening '" << OutputFilename << "'!\n";
- return 1;
- }
+ std::error_code EC;
+ tool_output_file Out(OutputFilename, EC, sys::fs::F_None);
+ if (EC) {
+ errs() << EC.message() << '\n';
+ return 1;
+ }
- // Make sure that the Out file gets unlink'd from the disk if we get a
- // SIGINT
- RemoveFileOnSignal(OutputFilename);
+ if (verifyModule(*Composite)) {
+ errs() << argv[0] << ": linked module is broken!\n";
+ return 1;
}
- if (Verbose) cerr << "Writing bytecode...\n";
- WriteBytecodeToFile(Composite.get(), *Out);
+ if (Verbose) errs() << "Writing bitcode...\n";
+ if (OutputAssembly) {
+ Out.os() << *Composite;
+ } else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
+ WriteBitcodeToFile(Composite.get(), Out.os());
+
+ // Declare success.
+ Out.keep();
- if (Out != &std::cout) delete Out;
return 0;
}
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