Compiler: rearranging the deck chairs.

First of several steps to adopt the new source directory layout.  No
logic changes - just moved files around.

Change-Id: I087631f8aa23973e18da4dc7706249c490bee061
diff --git a/src/compiler/dex/frontend.h b/src/compiler/dex/frontend.h
new file mode 100644
index 0000000..b261c65
--- /dev/null
+++ b/src/compiler/dex/frontend.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2011 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 ART_SRC_COMPILER_DEX_COMPILER_H_
+#define ART_SRC_COMPILER_DEX_COMPILER_H_
+
+#include "dex_file.h"
+#include "dex_instruction.h"
+
+namespace llvm {
+  class Module;
+  class LLVMContext;
+}
+
+namespace art {
+namespace greenland {
+  class IntrinsicHelper;
+  class IRBuilder;
+}
+
+#define COMPILER_TRACED(X)
+#define COMPILER_TRACEE(X)
+
+/*
+ * Special offsets to denote method entry/exit for debugger update.
+ * NOTE: bit pattern must be loadable using 1 instruction and must
+ * not be a valid Dalvik offset.
+ */
+#define DEBUGGER_METHOD_ENTRY -1
+#define DEBUGGER_METHOD_EXIT -2
+
+/*
+ * Assembly is an iterative process, and usually terminates within
+ * two or three passes.  This should be high enough to handle bizarre
+ * cases, but detect an infinite loop bug.
+ */
+#define MAX_ASSEMBLER_RETRIES 50
+
+// Suppress optimization if corresponding bit set.
+enum opt_control_vector {
+  kLoadStoreElimination = 0,
+  kLoadHoisting,
+  kSuppressLoads,
+  kNullCheckElimination,
+  kPromoteRegs,
+  kTrackLiveTemps,
+  kSkipLargeMethodOptimization,
+  kSafeOptimizations,
+  kBBOpt,
+  kMatch,
+  kPromoteCompilerTemps,
+};
+
+// Force code generation paths for testing.
+enum debugControlVector {
+  kDebugDisplayMissingTargets,
+  kDebugVerbose,
+  kDebugDumpCFG,
+  kDebugSlowFieldPath,
+  kDebugSlowInvokePath,
+  kDebugSlowStringPath,
+  kDebugSlowTypePath,
+  kDebugSlowestFieldPath,
+  kDebugSlowestStringPath,
+  kDebugExerciseResolveMethod,
+  kDebugVerifyDataflow,
+  kDebugShowMemoryUsage,
+  kDebugShowNops,
+  kDebugCountOpcodes,
+  kDebugDumpCheckStats,
+  kDebugDumpBitcodeFile,
+  kDebugVerifyBitcode,
+};
+
+enum OatMethodAttributes {
+  kIsCallee = 0,      // Code is part of a callee (invoked by a hot trace).
+  kIsHot,             // Code is part of a hot trace.
+  kIsLeaf,            // Method is leaf.
+  kIsEmpty,           // Method is empty.
+  kIsThrowFree,       // Method doesn't throw.
+  kIsGetter,          // Method fits the getter pattern.
+  kIsSetter,          // Method fits the setter pattern.
+  kCannotCompile,     // Method cannot be compiled.
+};
+
+#define METHOD_IS_CALLEE        (1 << kIsCallee)
+#define METHOD_IS_HOT           (1 << kIsHot)
+#define METHOD_IS_LEAF          (1 << kIsLeaf)
+#define METHOD_IS_EMPTY         (1 << kIsEmpty)
+#define METHOD_IS_THROW_FREE    (1 << kIsThrowFree)
+#define METHOD_IS_GETTER        (1 << kIsGetter)
+#define METHOD_IS_SETTER        (1 << kIsSetter)
+#define METHOD_CANNOT_COMPILE   (1 << kCannotCompile)
+
+class LLVMInfo {
+  public:
+    LLVMInfo();
+    ~LLVMInfo();
+
+    llvm::LLVMContext* GetLLVMContext() {
+      return llvm_context_.get();
+    }
+
+    llvm::Module* GetLLVMModule() {
+      return llvm_module_;
+    }
+
+    art::greenland::IntrinsicHelper* GetIntrinsicHelper() {
+      return intrinsic_helper_.get();
+    }
+
+    art::greenland::IRBuilder* GetIRBuilder() {
+      return ir_builder_.get();
+    }
+
+  private:
+    UniquePtr<llvm::LLVMContext> llvm_context_;
+    llvm::Module* llvm_module_; // Managed by context_.
+    UniquePtr<art::greenland::IntrinsicHelper> intrinsic_helper_;
+    UniquePtr<art::greenland::IRBuilder> ir_builder_;
+};
+
+struct CompilationUnit;
+struct BasicBlock;
+
+BasicBlock* FindBlock(CompilationUnit* cu, unsigned int code_offset);
+void ReplaceSpecialChars(std::string& str);
+
+}  // namespace art
+
+extern "C" art::CompiledMethod* ArtCompileMethod(art::Compiler& compiler,
+                                                 const art::DexFile::CodeItem* code_item,
+                                                 uint32_t access_flags,
+                                                 art::InvokeType invoke_type,
+                                                 uint32_t class_dex_idx,
+                                                 uint32_t method_idx,
+                                                 jobject class_loader,
+                                                 const art::DexFile& dex_file);
+
+#endif // ART_SRC_COMPILER_DEX_COMPILER_H_