Apply after-merge fixes to return to working state.

2 files changed, 0 insertions, 455 deletions

diff --git a/lib/Linker/LinkArchives.cpp b/lib/Linker/LinkArchives.cpp
deleted file mode 100644
index e5ec0b83b8..0000000000
--- a/lib/Linker/LinkArchives.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-//===- lib/Linker/LinkArchives.cpp - Link LLVM objects and libraries ------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains routines to handle linking together LLVM bitcode files,
-// and to handle annoying things like static libraries.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Linker.h"
-#include "llvm/ADT/SetOperations.h"
-#include "llvm/Bitcode/Archive.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/CommandLine.h" // @LOCALMOD
-
-#include <memory>
-#include <set>
-using namespace llvm;
-
-// @LOCALMOD-START
-// NOTE: this has a similar effect as
-//        tools/llvm/llvm-preserve.ll
-// which in turn is similar to the GNUS's attribute((used))
-// TODO(robertm): This is a little hackish for now
-static cl::list<std::string>
-UndefList("referenced-list", cl::value_desc("list"),
-          cl::desc("A list of symbols assumed to be referenced externally"),
-          cl::CommaSeparated);
-// @LOCALMOD-END
-  
-/// GetAllUndefinedSymbols - calculates the set of undefined symbols that still
-/// exist in an LLVM module. This is a bit tricky because there may be two
-/// symbols with the same name but different LLVM types that will be resolved to
-/// each other but aren't currently (thus we need to treat it as resolved).
-///
-/// Inputs:
-///  M - The module in which to find undefined symbols.
-///
-/// Outputs:
-///  UndefinedSymbols - A set of C++ strings containing the name of all
-///                     undefined symbols.
-///
-static void
-GetAllUndefinedSymbols(Module *M, std::set<std::string> &UndefinedSymbols) {
-  std::set<std::string> DefinedSymbols;
-  UndefinedSymbols.clear();
-  // @LOCALMOD-START
-  UndefinedSymbols.insert(UndefList.begin(), UndefList.end());
-  // @LOCALMOD-END
-  
-  // If the program doesn't define a main, try pulling one in from a .a file.
-  // This is needed for programs where the main function is defined in an
-  // archive, such f2c'd programs.
-  Function *Main = M->getFunction("main");
-  if (Main == 0 || Main->isDeclaration())
-    UndefinedSymbols.insert("main");
-
-  for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
-    if (I->hasName()) {
-      if (I->isDeclaration())
-        UndefinedSymbols.insert(I->getName());
-      else if (!I->hasLocalLinkage()) {
-        assert(!I->hasDLLImportLinkage()
-               && "Found dllimported non-external symbol!");
-        DefinedSymbols.insert(I->getName());
-      }      
-    }
-
-  for (Module::global_iterator I = M->global_begin(), E = M->global_end();
-       I != E; ++I)
-    if (I->hasName()) {
-      if (I->isDeclaration())
-        UndefinedSymbols.insert(I->getName());
-      else if (!I->hasLocalLinkage()) {
-        assert(!I->hasDLLImportLinkage()
-               && "Found dllimported non-external symbol!");
-        DefinedSymbols.insert(I->getName());
-      }      
-    }
-
-  for (Module::alias_iterator I = M->alias_begin(), E = M->alias_end();
-       I != E; ++I)
-    if (I->hasName())
-      DefinedSymbols.insert(I->getName());
-
-  // Prune out any defined symbols from the undefined symbols set...
-  for (std::set<std::string>::iterator I = UndefinedSymbols.begin();
-       I != UndefinedSymbols.end(); )
-    if (DefinedSymbols.count(*I))
-      UndefinedSymbols.erase(I++);  // This symbol really is defined!
-    else
-      ++I; // Keep this symbol in the undefined symbols list
-}
-
-/// LinkInArchive - opens an archive library and link in all objects which
-/// provide symbols that are currently undefined.
-///
-/// Inputs:
-///  Filename - The pathname of the archive.
-///
-/// Return Value:
-///  TRUE  - An error occurred.
-///  FALSE - No errors.
-bool
-Linker::LinkInArchive(const sys::Path &Filename, bool &is_native) {
-  // Make sure this is an archive file we're dealing with
-  if (!Filename.isArchive())
-    return error("File '" + Filename.str() + "' is not an archive.");
-
-  // Open the archive file
-  verbose("Linking archive file '" + Filename.str() + "'");
-
-  // Find all of the symbols currently undefined in the bitcode program.
-  // If all the symbols are defined, the program is complete, and there is
-  // no reason to link in any archive files.
-  std::set<std::string> UndefinedSymbols;
-  GetAllUndefinedSymbols(Composite, UndefinedSymbols);
-
-  if (UndefinedSymbols.empty()) {
-    verbose("No symbols undefined, skipping library '" + Filename.str() + "'");
-    return false;  // No need to link anything in!
-  }
-
-  std::string ErrMsg;
-  std::auto_ptr<Archive> AutoArch (
-    Archive::OpenAndLoadSymbols(Filename, Context, &ErrMsg));
-
-  Archive* arch = AutoArch.get();
-
-  if (!arch)
-    return error("Cannot read archive '" + Filename.str() +
-                 "': " + ErrMsg);
-  if (!arch->isBitcodeArchive()) {
-    is_native = true;
-    return false;
-  }
-  is_native = false;
-
-  // Save a set of symbols that are not defined by the archive. Since we're
-  // entering a loop, there's no point searching for these multiple times. This
-  // variable is used to "set_subtract" from the set of undefined symbols.
-  std::set<std::string> NotDefinedByArchive;
-
-  // Save the current set of undefined symbols, because we may have to make
-  // multiple passes over the archive:
-  std::set<std::string> CurrentlyUndefinedSymbols;
-
-  do {
-    CurrentlyUndefinedSymbols = UndefinedSymbols;
-
-    // Find the modules we need to link into the target module.  Note that arch
-    // keeps ownership of these modules and may return the same Module* from a
-    // subsequent call.
-    SmallVector<Module*, 16> Modules;
-    if (!arch->findModulesDefiningSymbols(UndefinedSymbols, Modules, &ErrMsg))
-      return error("Cannot find symbols in '" + Filename.str() + 
-                   "': " + ErrMsg);
-
-    // If we didn't find any more modules to link this time, we are done
-    // searching this archive.
-    if (Modules.empty())
-      break;
-
-    // Any symbols remaining in UndefinedSymbols after
-    // findModulesDefiningSymbols are ones that the archive does not define. So
-    // we add them to the NotDefinedByArchive variable now.
-    NotDefinedByArchive.insert(UndefinedSymbols.begin(),
-        UndefinedSymbols.end());
-
-    // Loop over all the Modules that we got back from the archive
-    for (SmallVectorImpl<Module*>::iterator I=Modules.begin(), E=Modules.end();
-         I != E; ++I) {
-
-      // Get the module we must link in.
-      std::string moduleErrorMsg;
-      Module* aModule = *I;
-      if (aModule != NULL) {
-        if (aModule->MaterializeAll(&moduleErrorMsg))
-          return error("Could not load a module: " + moduleErrorMsg);
-
-        verbose("  Linking in module: " + aModule->getModuleIdentifier());
-
-        // Link it in
-        if (LinkInModule(aModule, &moduleErrorMsg))
-          return error("Cannot link in module '" +
-                       aModule->getModuleIdentifier() + "': " + moduleErrorMsg);
-      } 
-    }
-    
-    // Get the undefined symbols from the aggregate module. This recomputes the
-    // symbols we still need after the new modules have been linked in.
-    GetAllUndefinedSymbols(Composite, UndefinedSymbols);
-
-    // At this point we have two sets of undefined symbols: UndefinedSymbols
-    // which holds the undefined symbols from all the modules, and
-    // NotDefinedByArchive which holds symbols we know the archive doesn't
-    // define. There's no point searching for symbols that we won't find in the
-    // archive so we subtract these sets.
-    set_subtract(UndefinedSymbols, NotDefinedByArchive);
-
-    // If there's no symbols left, no point in continuing to search the
-    // archive.
-    if (UndefinedSymbols.empty())
-      break;
-  } while (CurrentlyUndefinedSymbols != UndefinedSymbols);
-
-  return false;
-}
diff --git a/lib/Linker/LinkItems.cpp b/lib/Linker/LinkItems.cpp
deleted file mode 100644
index 0ab551d14d..0000000000
--- a/lib/Linker/LinkItems.cpp
+++ /dev/null
@@ -1,242 +0,0 @@
-//===- lib/Linker/LinkItems.cpp - Link LLVM objects and libraries ---------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains routines to handle linking together LLVM bitcode files,
-// and to handle annoying things like static libraries.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Linker.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/system_error.h"
-using namespace llvm;
-
-// LinkItems - This function is the main entry point into linking. It takes a
-// list of LinkItem which indicates the order the files should be linked and
-// how each file should be treated (plain file or with library search). The
-// function only links bitcode and produces a result list of items that are
-// native objects. 
-bool
-Linker::LinkInItems(const ItemList& Items, ItemList& NativeItems) {
-  // Clear the NativeItems just in case
-  NativeItems.clear();
-
-  // For each linkage item ...
-  for (ItemList::const_iterator I = Items.begin(), E = Items.end();
-       I != E; ++I) {
-    if (I->second) {
-      // Link in the library suggested.
-      bool is_native = false;
-      if (LinkInLibrary(I->first, is_native))
-        return true;
-      if (is_native)
-        NativeItems.push_back(*I);
-    } else {
-      // Link in the file suggested
-      bool is_native = false;
-      if (LinkInFile(sys::Path(I->first), is_native))
-        return true;
-      if (is_native)
-        NativeItems.push_back(*I);
-    }
-  }
-
-  // @LOCALMOD-BEGIN
-  // At this point we have processed all the link items provided to us. Since
-  // we have an aggregated module at this point, the dependent libraries in
-  // that module should also be aggregated with duplicates eliminated. This is
-  // now the time to process the dependent libraries to resolve any remaining
-  // symbols.
-  bool is_native;
-  for (Module::lib_iterator I = Composite->lib_begin(),
-         E = Composite->lib_end(); I != E; ++I) {
-    if(LinkInLibrary(*I, is_native))
-      return true;
-    if (is_native)
-      NativeItems.push_back(std::make_pair(*I, true));
-  }
-  // @LOCALMOD-END
-  return false;
-}
-
-
-/// LinkInLibrary - links one library into the HeadModule.
-///
-bool Linker::LinkInLibrary(StringRef Lib, bool& is_native) {
-  is_native = false;
-  // Determine where this library lives.
-  sys::Path Pathname = FindLib(Lib);
-  if (Pathname.isEmpty())
-    return error("Cannot find library '" + Lib.str() + "'");
-
-  // If its an archive, try to link it in
-  std::string Magic;
-  Pathname.getMagicNumber(Magic, 64);
-  switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
-    default: llvm_unreachable("Bad file type identification");
-    case sys::Unknown_FileType:
-      return warning("Supposed library '" + Lib.str() + "' isn't a library.");
-
-    case sys::Bitcode_FileType:
-      // LLVM ".so" file.
-      if (LinkInFile(Pathname, is_native))
-        return true;
-      break;
-
-    case sys::Archive_FileType:
-      if (LinkInArchive(Pathname, is_native))
-        return error("Cannot link archive '" + Pathname.str() + "'");
-      break;
-
-    case sys::ELF_Relocatable_FileType:
-    case sys::ELF_SharedObject_FileType:
-    case sys::Mach_O_Object_FileType:
-    case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
-    case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
-    case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
-    case sys::COFF_FileType:
-      is_native = true;
-      break;
-  }
-  return false;
-}
-
-/// LinkLibraries - takes the specified library files and links them into the
-/// main bitcode object file.
-///
-/// Inputs:
-///  Libraries  - The list of libraries to link into the module.
-///
-/// Return value:
-///  FALSE - No error.
-///  TRUE  - Error.
-///
-bool Linker::LinkInLibraries(const std::vector<std::string> &Libraries) {
-
-  // Process the set of libraries we've been provided.
-  bool is_native = false;
-  for (unsigned i = 0; i < Libraries.size(); ++i)
-    if (LinkInLibrary(Libraries[i], is_native))
-      return true;
-  // @LOCALMOD-BEGIN
-  // At this point we have processed all the libraries provided to us. Since
-  // we have an aggregated module at this point, the dependent libraries in
-  // that module should also be aggregated with duplicates eliminated. This is
-  // now the time to process the dependent libraries to resolve any remaining
-  // symbols.
-  const Module::LibraryListType& DepLibs = Composite->getLibraries();
-  for (Module::LibraryListType::const_iterator I = DepLibs.begin(),
-         E = DepLibs.end(); I != E; ++I)
-    if (LinkInLibrary(*I, is_native))
-      return true;
-  // @LOCALMOD-END
-  return false;
-}
-
-/// LinkInFile - opens a bitcode file and links in all objects which
-/// provide symbols that are currently undefined.
-///
-/// Inputs:
-///  File - The pathname of the bitcode file.
-///
-/// Outputs:
-///  ErrorMessage - A C++ string detailing what error occurred, if any.
-///
-/// Return Value:
-///  TRUE  - An error occurred.
-///  FALSE - No errors.
-///
-bool Linker::LinkInFile(const sys::Path &File, bool &is_native) {
-  is_native = false;
-  
-  // Check for a file of name "-", which means "read standard input"
-  if (File.str() == "-") {
-    std::auto_ptr<Module> M;
-    OwningPtr<MemoryBuffer> Buffer;
-    error_code ec;
-    if (!(ec = MemoryBuffer::getSTDIN(Buffer))) {
-      if (!Buffer->getBufferSize()) {
-        Error = "standard input is empty";
-      } else {
-        M.reset(ParseBitcodeFile(Buffer.get(), Context, &Error));
-        if (M.get())
-          if (!LinkInModule(M.get(), &Error))
-            return false;
-      }
-    }
-    return error("Cannot link stdin: " + ec.message());
-  }
-
-  // Determine what variety of file it is.
-  std::string Magic;
-  if (!File.getMagicNumber(Magic, 64))
-    return error("Cannot find linker input '" + File.str() + "'");
-
-  switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
-    default: llvm_unreachable("Bad file type identification");
-    case sys::Unknown_FileType:
-      return warning("Ignoring file '" + File.str() + 
-                   "' because does not contain bitcode.");
-
-    case sys::Archive_FileType:
-      // A user may specify an ar archive without -l, perhaps because it
-      // is not installed as a library. Detect that and link the archive.
-      if (LinkInArchive(File, is_native))
-        return true;
-      break;
-
-    case sys::Bitcode_FileType: {
-      verbose("Linking bitcode file '" + File.str() + "'");
-      std::auto_ptr<Module> M(LoadObject(File));
-      if (M.get() == 0)
-        return error("Cannot load file '" + File.str() + "': " + Error);
-      if (LinkInModule(M.get(), &Error))
-        return error("Cannot link file '" + File.str() + "': " + Error);
-
-      verbose("Linked in file '" + File.str() + "'");
-      break;
-    }
-
-    case sys::ELF_Relocatable_FileType:
-    case sys::ELF_SharedObject_FileType:
-    case sys::Mach_O_Object_FileType:
-    case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
-    case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
-    case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
-    case sys::COFF_FileType:
-      is_native = true;
-      break;
-  }
-  return false;
-}
-
-/// LinkFiles - takes a module and a list of files and links them all together.
-/// It locates the file either in the current directory, as its absolute
-/// or relative pathname, or as a file somewhere in LLVM_LIB_SEARCH_PATH.
-///
-/// Inputs:
-///  Files      - A vector of sys::Path indicating the LLVM bitcode filenames
-///               to be linked.  The names can refer to a mixture of pure LLVM
-///               bitcode files and archive (ar) formatted files.
-///
-/// Return value:
-///  FALSE - No errors.
-///  TRUE  - Some error occurred.
-///
-bool Linker::LinkInFiles(const std::vector<sys::Path> &Files) {
-  bool is_native;
-  for (unsigned i = 0; i < Files.size(); ++i)
-    if (LinkInFile(Files[i], is_native))
-      return true;
-  return false;
-}