Introduce CompilerConfig.
CompilerConfig defines the "attributes" of a Compiler. It contains
target information, configuration, etc. to setup an instance of
Compiler (more specifically, a instance of LLVM TargetMachine used by
the compiler.)
CompilerConfig together with bcc::init::Initialize() will replace
current Compiler::GlobalInitialization().
diff --git a/lib/ExecutionEngine/CompilerConfig.cpp b/lib/ExecutionEngine/CompilerConfig.cpp
new file mode 100644
index 0000000..faaaa97
--- /dev/null
+++ b/lib/ExecutionEngine/CompilerConfig.cpp
@@ -0,0 +1,109 @@
+/*
+ * 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 "CompilerConfig.h"
+
+#include <llvm/CodeGen/SchedulerRegistry.h>
+#include <llvm/MC/SubtargetFeature.h>
+#include <llvm/Support/TargetRegistry.h>
+
+#include "DebugHelper.h"
+#include "TargetCompilerConfigs.h"
+
+using namespace bcc;
+
+CompilerConfig::CompilerConfig(const std::string &pTriple)
+ : mTriple(pTriple), mTarget(NULL) {
+ //===--------------------------------------------------------------------===//
+ // Default setting of register sheduler
+ //===--------------------------------------------------------------------===//
+ llvm::RegisterScheduler::setDefault(llvm::createDefaultScheduler);
+
+ //===--------------------------------------------------------------------===//
+ // Default setting of target options
+ //===--------------------------------------------------------------------===//
+ // Use hardfloat ABI by default.
+ //
+ // TODO(all): Need to detect the CPU capability and decide whether to use
+ // softfp. To use softfp, change the following 2 lines to
+ //
+ // options.FloatABIType = llvm::FloatABI::Soft;
+ // options.UseSoftFloat = true;
+ mTargetOpts.FloatABIType = llvm::FloatABI::Soft;
+ mTargetOpts.UseSoftFloat = false;
+
+ // Enable frame pointer elimination optimization by default.
+ mTargetOpts.NoFramePointerElim = false;
+
+ //===--------------------------------------------------------------------===//
+ // Default setting for code model
+ //===--------------------------------------------------------------------===//
+ mCodeModel = llvm::CodeModel::Small;
+
+ //===--------------------------------------------------------------------===//
+ // Default setting for relocation model
+ //===--------------------------------------------------------------------===//
+ mRelocModel = llvm::Reloc::Default;
+
+ //===--------------------------------------------------------------------===//
+ // Default setting for optimization level (-O2)
+ //===--------------------------------------------------------------------===//
+ mOptLevel = llvm::CodeGenOpt::Default;
+
+ //===--------------------------------------------------------------------===//
+ // Default setting for architecture type
+ //===--------------------------------------------------------------------===//
+ mArchType = llvm::Triple::UnknownArch;
+
+ initializeTarget();
+ initializeArch();
+
+ return;
+}
+
+bool CompilerConfig::initializeTarget() {
+ std::string error;
+ mTarget = llvm::TargetRegistry::lookupTarget(mTriple, error);
+ if (mTarget != NULL) {
+ return true;
+ } else {
+ ALOGE("Cannot initialize llvm::Target for given triple '%s'! (%s)",
+ mTriple.c_str(), error.c_str());
+ return false;
+ }
+}
+
+void CompilerConfig::initializeArch() {
+ if (mTarget != NULL) {
+ mArchType = llvm::Triple::getArchTypeForLLVMName(mTarget->getName());
+ } else {
+ mArchType = llvm::Triple::UnknownArch;
+ }
+ return;
+}
+
+void CompilerConfig::setFeatureString(const std::vector<std::string> &pAttrs) {
+ llvm::SubtargetFeatures f;
+
+ for (std::vector<std::string>::const_iterator attr_iter = pAttrs.begin(),
+ attr_end = pAttrs.end();
+ attr_iter != attr_end; attr_iter++) {
+ f.AddFeature(*attr_iter);
+ }
+
+ mFeatureString = f.getString();
+ return;
+}