add bitcode support

[oota-llvm.git] / lib / Linker / Linker.cpp

diff --git a/lib/Linker/Linker.cpp b/lib/Linker/Linker.cpp
index 9ffe7a121e066e6e7fad5cb9dcd6a4ca7b421bc8..bfa30044dcf61b060ddc4f2e25181d70c98f99c2 100644 (file)
--- a/lib/Linker/Linker.cpp
+++ b/lib/Linker/Linker.cpp
@@ -14,11 +14,15 @@
 #include "llvm/Linker.h"
 #include "llvm/Module.h"
 #include "llvm/Bytecode/Reader.h"
+#include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Config/config.h"
-#include <iostream>
-
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/Support/Compressor.h"
 using namespace llvm;
 
+static const bool Bitcode = false;
+
 Linker::Linker(const std::string& progname, const std::string& modname, unsigned flags)
   : Composite(0)
   , LibPaths()
@@ -45,26 +49,23 @@ Linker::~Linker() {
 bool
 Linker::error(const std::string& message) {
   Error = message;
-  if (!(Flags&QuietErrors)) {
-    std::cerr << ProgramName << ": error: " << message << "\n";
-  }
+  if (!(Flags&QuietErrors))
+    cerr << ProgramName << ": error: " << message << "\n";
   return true;
 }
 
 bool
 Linker::warning(const std::string& message) {
   Error = message;
-  if (!(Flags&QuietErrors)) {
-    std::cerr << ProgramName << ": warning: " << message << "\n";
-  }
+  if (!(Flags&QuietErrors))
+    cerr << ProgramName << ": warning: " << message << "\n";
   return false;
 }
 
 void
 Linker::verbose(const std::string& message) {
-  if (Flags&Verbose) {
-    std::cerr << "  " << message << "\n";
-  }
+  if (Flags&Verbose)
+    cerr << "  " << message << "\n";
 }
 
 void
@@ -103,7 +104,21 @@ Linker::releaseModule() {
 std::auto_ptr<Module>
 Linker::LoadObject(const sys::Path &FN) {
   std::string ParseErrorMessage;
-  Module *Result = ParseBytecodeFile(FN.toString(), &ParseErrorMessage);
+  Module *Result = 0;
+  
+  const std::string &FNS = FN.toString();
+  if (Bitcode) {
+    std::auto_ptr<MemoryBuffer> Buffer(
+                          MemoryBuffer::getFileOrSTDIN(&FNS[0], FNS.size()));
+    if (Buffer.get())
+      Result = ParseBitcodeFile(Buffer.get(), &ParseErrorMessage);
+    else
+      ParseErrorMessage = "Error reading file '" + FNS + "'";
+    
+  } else {
+    Result = ParseBytecodeFile(FNS, Compressor::decompressToNewBuffer,
+                               &ParseErrorMessage);
+  }
   if (Result)
     return std::auto_ptr<Module>(Result);
   Error = "Bytecode file '" + FN.toString() + "' could not be loaded";
@@ -119,31 +134,29 @@ static inline sys::Path IsLibrary(const std::string& Name,
 
   sys::Path FullPath(Directory);
 
-  // Make sure the directory actually is a directory in the file system.
-  if (FullPath.isDirectory())
-  {
-    // Try the libX.a form
-    FullPath.appendComponent("lib" + Name);
-    FullPath.appendSuffix("a");
-    if (FullPath.isArchive())
-      return FullPath;
-
-    // Try the libX.bca form
-    FullPath.eraseSuffix();
-    FullPath.appendSuffix("bca");
-    if (FullPath.isArchive())
-      return FullPath;
-
-    // Try the libX.so form
-    FullPath.eraseSuffix();
-    FullPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
-    if (FullPath.isDynamicLibrary())  // Native shared library?
-      return FullPath;
-    if (FullPath.isBytecodeFile())    // .so file containing bytecode?
-      return FullPath;
-
-    // Not found .. fall through
-  }
+  // Try the libX.a form
+  FullPath.appendComponent("lib" + Name);
+  FullPath.appendSuffix("a");
+  if (FullPath.isArchive())
+    return FullPath;
+
+  // Try the libX.bca form
+  FullPath.eraseSuffix();
+  FullPath.appendSuffix("bca");
+  if (FullPath.isArchive())
+    return FullPath;
+
+  // Try the libX.so (or .dylib) form
+  FullPath.eraseSuffix();
+  FullPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
+  if (FullPath.isDynamicLibrary())  // Native shared library?
+    return FullPath;
+  if (FullPath.isBytecodeFile())    // .so file containing bytecode?
+    return FullPath;
+  if (FullPath.isBitcodeFile())    // .so file containing bitcode?
+    return FullPath;
+
+  // Not found .. fall through
 
   // Indicate that the library was not found in the directory.
   FullPath.clear();
@@ -157,8 +170,7 @@ static inline sys::Path IsLibrary(const std::string& Name,
 /// Path if no matching file can be found.
 ///
 sys::Path
-Linker::FindLib(const std::string &Filename)
-{
+Linker::FindLib(const std::string &Filename) {
   // Determine if the pathname can be found as it stands.
   sys::Path FilePath(Filename);
   if (FilePath.canRead() &&