Introduce CompilerOption for compile() interface.

This provides flexibility. We can now setup different configuration
from the outside of compile() easily.

Change-Id: Ic4e593dd3c9f41de2fdfa492fecabd9f0e231463
diff --git a/lib/ExecutionEngine/CompilerOption.h b/lib/ExecutionEngine/CompilerOption.h
new file mode 100644
index 0000000..92754f0
--- /dev/null
+++ b/lib/ExecutionEngine/CompilerOption.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2010, 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.
+ */
+
+#ifndef BCC_COMPILER_OPTION_H
+#define BCC_COMPILER_OPTION_H
+
+#include "Config.h"
+
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Support/CodeGen.h"
+
+namespace bcc {
+
+typedef struct CompilerOption {
+  llvm::TargetOptions TargetOpt;
+  llvm::CodeModel::Model CodeModelOpt;
+  llvm::Reloc::Model RelocModelOpt;
+  bool LoadAfterCompile;
+
+  // Constructor setup "default configuration". The "default configuration"
+  // here means the configuration for running RenderScript (more specifically,
+  // one can declare a CompilerOption object (call default constructor) and then
+  // pass to the Compiler::compiler() without any modification for RenderScript,
+  // see Script::prepareExecutable(...))
+  CompilerOption() {
+    //-- Setup options to llvm::TargetMachine --//
+
+    // Use hardfloat ABI
+    //
+    // TODO(all): Need to detect the CPU capability and decide whether to use
+    // softfp. To use softfp, change following 2 lines to
+    //
+    // options.FloatABIType = llvm::FloatABI::Soft;
+    // options.UseSoftFloat = true;
+    TargetOpt.FloatABIType = llvm::FloatABI::Soft;
+    TargetOpt.UseSoftFloat = false;
+
+    //-- Setup relocation model  --//
+    RelocModelOpt = llvm::Reloc::Static;
+
+    //-- Load the result object after successful compilation  --//
+    LoadAfterCompile = true;
+  }
+} CompilerOption;
+
+} // namespace bcc
+
+#endif  // BCC_COMPILER_OPTION_H