A BCCompiler that supports "lowering" (target-defined) before codegen

Change-Id: Iaf327a4867bb00af57c253c9cea13e7a8cb0572e
diff --git a/lib/AndroidBitcode/ABCCompiler.cpp b/lib/AndroidBitcode/ABCCompiler.cpp
new file mode 100644
index 0000000..1b7294d
--- /dev/null
+++ b/lib/AndroidBitcode/ABCCompiler.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 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 "bcc/AndroidBitcode/ABCCompiler.h"
+
+#include <llvm/Module.h>
+#include <llvm/PassManager.h>
+#include <llvm/Target/TargetData.h>
+#include <llvm/Target/TargetMachine.h>
+
+#include "bcc/Script.h"
+#include "bcc/Source.h"
+
+namespace bcc {
+
+bool ABCCompiler::beforeAddCodeGenPasses(Script &pScript,
+                                         llvm::PassManager &pPM) {
+  llvm::PassManager pm;
+  llvm::Module &module = pScript.getSource().getModule();
+  const llvm::TargetMachine &tm = getTargetMachine();
+  llvm::TargetData *target_data =
+    new (std::nothrow) llvm::TargetData(*(tm.getTargetData()));
+
+  if (target_data == NULL) {
+    return false;
+  }
+
+  pm.add(target_data);
+  pm.run(module);
+
+  return true;
+}
+
+} // namespace bcc