diff --git a/src/compiler_llvm/compilation_unit.cc b/src/compiler_llvm/compilation_unit.cc
new file mode 100644
index 0000000..45c4bb7
--- /dev/null
+++ b/src/compiler_llvm/compilation_unit.cc
@@ -0,0 +1,218 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "compilation_unit.h"
+
+#include "constants.h"
+#include "ir_builder.h"
+#include "logging.h"
+
+#include <llvm/ADT/OwningPtr.h>
+#include <llvm/ADT/StringSet.h>
+#include <llvm/ADT/Triple.h>
+#include <llvm/Analysis/CallGraph.h>
+#include <llvm/Analysis/DebugInfo.h>
+#include <llvm/Analysis/LoopPass.h>
+#include <llvm/Analysis/RegionPass.h>
+#include <llvm/Analysis/Verifier.h>
+#include <llvm/Assembly/PrintModulePass.h>
+#include <llvm/Bitcode/ReaderWriter.h>
+#include <llvm/CallGraphSCCPass.h>
+#include <llvm/DerivedTypes.h>
+#include <llvm/LLVMContext.h>
+#include <llvm/LinkAllPasses.h>
+#include <llvm/LinkAllVMCore.h>
+#include <llvm/Module.h>
+#include <llvm/PassManager.h>
+#include <llvm/Support/Debug.h>
+#include <llvm/Support/FormattedStream.h>
+#include <llvm/Support/ManagedStatic.h>
+#include <llvm/Support/PassNameParser.h>
+#include <llvm/Support/PluginLoader.h>
+#include <llvm/Support/PrettyStackTrace.h>
+#include <llvm/Support/Signals.h>
+#include <llvm/Support/SystemUtils.h>
+#include <llvm/Support/TargetRegistry.h>
+#include <llvm/Support/TargetSelect.h>
+#include <llvm/Support/ToolOutputFile.h>
+#include <llvm/Support/raw_ostream.h>
+#include <llvm/Target/TargetData.h>
+#include <llvm/Target/TargetLibraryInfo.h>
+#include <llvm/Target/TargetMachine.h>
+#include <llvm/Transforms/IPO/PassManagerBuilder.h>
+
+#include <string>
+
+namespace art {
+namespace compiler_llvm {
+
+llvm::Module* makeLLVMModuleContents(llvm::Module* module);
+
+
+CompilationUnit::CompilationUnit(InstructionSet insn_set)
+: insn_set_(insn_set), context_(new llvm::LLVMContext()), mem_usage_(0) {
+
+  // Create the module and include the runtime function declaration
+  module_ = new llvm::Module("art", *context_);
+  makeLLVMModuleContents(module_);
+
+  // Create IRBuilder
+  irb_.reset(new IRBuilder(*context_, *module_));
+}
+
+
+CompilationUnit::~CompilationUnit() {
+}
+
+
+bool CompilationUnit::WriteBitcodeToFile() {
+  std::string errmsg;
+
+  llvm::OwningPtr<llvm::tool_output_file> out_file(
+    new llvm::tool_output_file(bitcode_filename_.c_str(), errmsg,
+                               llvm::raw_fd_ostream::F_Binary));
+
+
+  if (!errmsg.empty()) {
+    LOG(ERROR) << "Failed to create bitcode output file: " << errmsg;
+    return false;
+  }
+
+  llvm::WriteBitcodeToFile(module_, out_file->os());
+  out_file->keep();
+
+  return true;
+}
+
+
+bool CompilationUnit::Materialize() {
+  // Initialize LLVM optimization passes
+  llvm::PassRegistry &Registry = *llvm::PassRegistry::getPassRegistry();
+
+  llvm::initializeCore(Registry);
+  llvm::initializeScalarOpts(Registry);
+  llvm::initializeIPO(Registry);
+  llvm::initializeAnalysis(Registry);
+  llvm::initializeIPA(Registry);
+  llvm::initializeTransformUtils(Registry);
+  llvm::initializeInstCombine(Registry);
+  llvm::initializeInstrumentation(Registry);
+  llvm::initializeTarget(Registry);
+
+  // Lookup the LLVM target
+  char const* target_triple = NULL;
+  char const* target_attr = NULL;
+
+  if (insn_set_ == kThumb2) {
+    target_triple = "thumb-none-linux-gnueabi";
+    target_attr = "+thumb2,+neon,+neonfp,+vfp3";
+  } else if (insn_set_ == kArm) {
+    target_triple = "armv7-none-linux-gnueabi";
+    target_attr = "+v7,+neon,+neonfp,+vfp3";
+  } else if (insn_set_ == kX86) {
+    target_triple = "i386-pc-linux-gnu";
+    target_attr = "";
+  // } else if (insn_set_ == kMips) {
+  //  target_triple = "mipsel-unknown-linux";
+  //  target_attr = "";
+  } else {
+    LOG(FATAL) << "Unknown instruction set: " << insn_set_;
+  }
+
+  std::string errmsg;
+  llvm::Target const* target =
+    llvm::TargetRegistry::lookupTarget(target_triple, errmsg);
+
+  CHECK(target != NULL) << errmsg;
+
+  // Target options
+  llvm::TargetOptions target_options;
+
+  target_options.FloatABIType = llvm::FloatABI::Soft;
+  target_options.UseSoftFloat = false;
+
+  // Create the llvm::TargetMachine
+  llvm::TargetMachine* target_machine =
+    target->createTargetMachine(target_triple, "", target_attr, target_options,
+                                llvm::Reloc::Static, llvm::CodeModel::Small,
+                                llvm::CodeGenOpt::Aggressive);
+
+  CHECK(target_machine != NULL) << "Failed to create target machine";
+
+
+  // Add target data
+  llvm::TargetData const* target_data = target_machine->getTargetData();
+
+  // PassManager for code generation passes
+  llvm::PassManager pm;
+  pm.add(new llvm::TargetData(*target_data));
+
+  // FunctionPassManager for optimization pass
+  llvm::FunctionPassManager fpm(module_);
+  fpm.add(new llvm::TargetData(*target_data));
+
+  // Add optimization pass
+  llvm::PassManagerBuilder pm_builder;
+  pm_builder.Inliner = NULL; // TODO: add some inline in the future
+  pm_builder.OptLevel = 3;
+  pm_builder.DisableSimplifyLibCalls = 1;
+  pm_builder.populateModulePassManager(pm);
+  pm_builder.populateFunctionPassManager(fpm);
+
+  // Add passes to emit file
+  llvm::OwningPtr<llvm::tool_output_file> out_file(
+    new llvm::tool_output_file(elf_filename_.c_str(), errmsg,
+                               llvm::raw_fd_ostream::F_Binary));
+
+  llvm::formatted_raw_ostream formatted_os(out_file->os(), false);
+
+  // Ask the target to add backend passes as necessary.
+  if (target_machine->addPassesToEmitFile(pm,
+                                          formatted_os,
+                                          llvm::TargetMachine::CGFT_ObjectFile,
+                                          true)) {
+    LOG(FATAL) << "Unable to generate ELF for this target";
+    return false;
+  }
+
+  // Run the per-function optimization
+  fpm.doInitialization();
+  for (llvm::Module::iterator F = module_->begin(), E = module_->end();
+       F != E; ++F) {
+    fpm.run(*F);
+  }
+  fpm.doFinalization();
+  LOG(INFO) << "Intraprocedural optimization finished!";
+
+  // Run the code generation passes
+  pm.run(*module_);
+  LOG(INFO) << "Code generation finished!";
+
+  out_file->keep();
+  LOG(DEBUG) << "ELF: " << elf_filename_ << " (done)";
+
+  return true;
+}
+
+
+void CompilationUnit::Finalize() {
+  context_.reset(NULL);
+  irb_.reset(NULL);
+  module_ = NULL;
+}
+
+} // namespace compiler_llvm
+} // namespace art