X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=tools%2Fllvm-link%2Fllvm-link.cpp;h=ae5fa40ecba8491639cc96ca00cb8d4cfb666e0a;hp=c975abc3f642e5f190e1cbca36f6a2ce8d0c760d;hb=8b477ed579794ba6d76915d56b3f448a7dd20120;hpb=c8cc4cb03bd90f89be7fe1649542a2d5ae689632

diff --git a/tools/llvm-link/llvm-link.cpp b/tools/llvm-link/llvm-link.cpp
index c975abc3f64..ae5fa40ecba 100644
--- a/tools/llvm-link/llvm-link.cpp
+++ b/tools/llvm-link/llvm-link.cpp
@@ -1,137 +1,156 @@
+//===- 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/Linker.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
-#include "Support/CommandLine.h"
-#include "Support/Signals.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Signals.h"
+#include "llvm/System/Path.h"
 #include <fstream>
+#include <iostream>
 #include <memory>
-#include <sys/types.h>     // For FileExists
-#include <sys/stat.h>
+using namespace llvm;
 
+static cl::list<std::string>
+InputFilenames(cl::Positional, cl::OneOrMore,
+               cl::desc("<input bitcode files>"));
 
-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);
-cl::StringList Libraries ("l", "Specify libraries to link to", cl::ZeroOrMore);
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"), cl::init("-"),
+               cl::value_desc("filename"));
 
+static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
 
-// 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;
-}
+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);
 
-// LoadFile - Read the specified bytecode file in and return it.  This routine
+// 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 std::auto_ptr<Module> LoadFile(const std::string &FN) {
-  std::string Filename = FN;
-  std::string ErrorMessage;
-
-  unsigned NextLibPathIdx = 0;
-  bool FoundAFile = false;
+static inline std::auto_ptr<Module> LoadFile(const std::string &FN, 
+                                             LLVMContext* Context) {
+  sys::Path Filename;
+  if (!Filename.set(FN)) {
+    cerr << "Invalid file name: '" << FN << "'\n";
+    return std::auto_ptr<Module>();
+  }
 
-  while (1) {
-    if (Verbose) cerr << "Loading '" << Filename << "'\n";
-    if (FileExists(Filename)) FoundAFile = true;
-    Module *Result = ParseBytecodeFile(Filename, &ErrorMessage);
+  std::string ErrorMessage;
+  if (Filename.exists()) {
+    if (Verbose) cerr << "Loading '" << Filename.c_str() << "'\n";
+    Module* Result = 0;
+    
+    const std::string &FNStr = Filename.toString();
+    if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(FNStr,
+                                                            &ErrorMessage)) {
+      Result = ParseBitcodeFile(Buffer, Context, &ErrorMessage);
+      delete Buffer;
+    }
     if (Result) return std::auto_ptr<Module>(Result);   // Load successful!
 
     if (Verbose) {
-      cerr << "Error opening bytecode file: '" << Filename << "'";
+      cerr << "Error opening bitcode file: '" << Filename.c_str() << "'";
       if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
       cerr << "\n";
     }
-    
-    if (NextLibPathIdx == LibPaths.size()) break;
-    Filename = LibPaths[NextLibPathIdx++] + "/" + FN;
+  } else {
+    cerr << "Bitcode file: '" << Filename.c_str() << "' does not exist.\n";
   }
 
-  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>();
 }
 
-
-
-
 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;
+  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::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg], &Context));
+  if (Composite.get() == 0) {
+    cerr << argv[0] << ": error loading file '"
+         << InputFilenames[BaseArg] << "'\n";
+    return 1;
   }
 
-  if (!Libraries.empty())
-    cerr << "LLVM Linker Warning:  Linking to libraries is unimplemented!\n";
-
-  std::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg]));
-  if (Composite.get() == 0) return 1;
-
   for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
-    std::auto_ptr<Module> M(LoadFile(InputFilenames[i]));
-    if (M.get() == 0) return 1;
+    std::auto_ptr<Module> M(LoadFile(InputFilenames[i], &Context));
+    if (M.get() == 0) {
+      cerr << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
+      return 1;
+    }
 
     if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
 
-    if (LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
-      cerr << "Error linking in '" << InputFilenames[i] << "': "
-	   << ErrorMessage << "\n";
+    if (Linker::LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
+      cerr << argv[0] << ": link error in '" << InputFilenames[i]
+           << "': " << ErrorMessage << "\n";
       return 1;
     }
   }
 
-  if (DumpAsm) cerr << "Here's the assembly:\n" << Composite.get();
+  // TODO: Iterate over the -l list and link in any modules containing
+  // global symbols that have not been resolved so far.
+
+  if (DumpAsm) cerr << "Here's the assembly:\n" << *Composite.get();
 
-  ostream *Out = &cout;  // Default to printing to stdout...
+  // FIXME: cout is not binary!
+  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"
+      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::openmode io_mode = std::ios::out | std::ios::trunc |
+                                 std::ios::binary;
+    Out = new std::ofstream(OutputFilename.c_str(), io_mode);
     if (!Out->good()) {
-      cerr << "Error opening '" << OutputFilename << "'!\n";
+      cerr << argv[0] << ": error opening '" << OutputFilename << "'!\n";
       return 1;
     }
 
-    // Make sure that the Out file gets unlink'd from the disk if we get a
+    // Make sure that the Out file gets unlinked from the disk if we get a
     // SIGINT
-    RemoveFileOnSignal(OutputFilename);
+    sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+  }
+
+  if (verifyModule(*Composite.get())) {
+    cerr << argv[0] << ": linked module is broken!\n";
+    return 1;
   }
 
-  if (Verbose) cerr << "Writing bytecode...\n";
-  WriteBytecodeToFile(Composite.get(), *Out);
+  if (Verbose) cerr << "Writing bitcode...\n";
+  WriteBitcodeToFile(Composite.get(), *Out);
 
   if (Out != &std::cout) delete Out;
   return 0;