X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllvm-link%2Fllvm-link.cpp;h=99cca2322d8a8ce701f3492f1a21a80ba24862da;hb=5be77762a3aa434ee877b0a03b98b5c3a7571918;hp=11000de9a719ab6b365221897a7f4f82201da405;hpb=871c24f6d009bdf39257f3e577e335e7171b598f;p=oota-llvm.git

diff --git a/tools/llvm-link/llvm-link.cpp b/tools/llvm-link/llvm-link.cpp
index 11000de9a71..99cca2322d8 100644
--- a/tools/llvm-link/llvm-link.cpp
+++ b/tools/llvm-link/llvm-link.cpp
@@ -1,133 +1,130 @@
+//===- 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.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/Support/CommandLine.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>
-
-
-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);
 
+// 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 = 0;
 
+  Result = ParseIRFile(FN, Err, Context);
+  if (Result) return Result;   // Load successful!
+
+  Err.print(argv0, errs());
+  return NULL;
+}
 
 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];
+  OwningPtr<Module> Composite(LoadFile(argv[0],
+                                       InputFilenames[BaseArg], Context));
+  if (Composite.get() == 0) {
+    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());
   for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
-    std::auto_ptr<Module> M(LoadFile(InputFilenames[i]));
-    if (M.get() == 0) return 1;
+    OwningPtr<Module> M(LoadFile(argv[0], InputFilenames[i], Context));
+    if (M.get() == 0) {
+      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;
 
-  ostream *Out = &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::string ErrorInfo;
+  tool_output_file Out(OutputFilename.c_str(), ErrorInfo, sys::fs::F_Binary);
+  if (!ErrorInfo.empty()) {
+    errs() << ErrorInfo << '\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;
 }