upload android base code part3

android/art/compiler/dex/inline_method_analyser.h

@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2014 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_COMPILER_DEX_INLINE_METHOD_ANALYSER_H_
+#define ART_COMPILER_DEX_INLINE_METHOD_ANALYSER_H_
+
+#include "base/macros.h"
+#include "base/mutex.h"
+#include "dex_file.h"
+#include "dex_instruction.h"
+#include "method_reference.h"
+
+/*
+ * NOTE: This code is part of the quick compiler. It lives in the runtime
+ * only to allow the debugger to check whether a method has been inlined.
+ */
+
+namespace art {
+
+namespace verifier {
+class MethodVerifier;
+}  // namespace verifier
+class ArtMethod;
+
+enum InlineMethodOpcode : uint16_t {
+  kInlineOpNop,
+  kInlineOpReturnArg,
+  kInlineOpNonWideConst,
+  kInlineOpIGet,
+  kInlineOpIPut,
+  kInlineOpConstructor,
+};
+
+struct InlineIGetIPutData {
+  // The op_variant below is DexMemAccessType but the runtime doesn't know that enumeration.
+  uint16_t op_variant : 3;
+  uint16_t method_is_static : 1;
+  uint16_t object_arg : 4;
+  uint16_t src_arg : 4;  // iput only
+  uint16_t return_arg_plus1 : 4;  // iput only, method argument to return + 1, 0 = return void.
+  uint16_t field_idx;
+  uint32_t is_volatile : 1;
+  uint32_t field_offset : 31;
+};
+static_assert(sizeof(InlineIGetIPutData) == sizeof(uint64_t), "Invalid size of InlineIGetIPutData");
+
+struct InlineReturnArgData {
+  uint16_t arg;
+  uint16_t is_wide : 1;
+  uint16_t is_object : 1;
+  uint16_t reserved : 14;
+  uint32_t reserved2;
+};
+static_assert(sizeof(InlineReturnArgData) == sizeof(uint64_t),
+              "Invalid size of InlineReturnArgData");
+
+struct InlineConstructorData {
+  // There can be up to 3 IPUTs, unused fields are marked with kNoDexIndex16.
+  uint16_t iput0_field_index;
+  uint16_t iput1_field_index;
+  uint16_t iput2_field_index;
+  uint16_t iput0_arg : 4;
+  uint16_t iput1_arg : 4;
+  uint16_t iput2_arg : 4;
+  uint16_t reserved : 4;
+};
+static_assert(sizeof(InlineConstructorData) == sizeof(uint64_t),
+              "Invalid size of InlineConstructorData");
+
+struct InlineMethod {
+  InlineMethodOpcode opcode;
+  union {
+    uint64_t data;
+    InlineIGetIPutData ifield_data;
+    InlineReturnArgData return_data;
+    InlineConstructorData constructor_data;
+  } d;
+};
+
+class InlineMethodAnalyser {
+ public:
+  /**
+   * Analyse method code to determine if the method is a candidate for inlining.
+   * If it is, record the inlining data.
+   *
+   * @return true if the method is a candidate for inlining, false otherwise.
+   */
+  static bool AnalyseMethodCode(ArtMethod* method, InlineMethod* result)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  static constexpr bool IsInstructionIGet(Instruction::Code opcode) {
+    return Instruction::IGET <= opcode && opcode <= Instruction::IGET_SHORT;
+  }
+
+  static constexpr bool IsInstructionIPut(Instruction::Code opcode) {
+    return Instruction::IPUT <= opcode && opcode <= Instruction::IPUT_SHORT;
+  }
+
+  static constexpr uint16_t IGetVariant(Instruction::Code opcode) {
+    return opcode - Instruction::IGET;
+  }
+
+  static constexpr uint16_t IPutVariant(Instruction::Code opcode) {
+    return opcode - Instruction::IPUT;
+  }
+
+  // Determines whether the method is a synthetic accessor (method name starts with "access$").
+  static bool IsSyntheticAccessor(MethodReference ref);
+
+ private:
+  static bool AnalyseMethodCode(const DexFile::CodeItem* code_item,
+                                const MethodReference& method_ref,
+                                bool is_static,
+                                ArtMethod* method,
+                                InlineMethod* result)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+  static bool AnalyseReturnMethod(const DexFile::CodeItem* code_item, InlineMethod* result);
+  static bool AnalyseConstMethod(const DexFile::CodeItem* code_item, InlineMethod* result);
+  static bool AnalyseIGetMethod(const DexFile::CodeItem* code_item,
+                                const MethodReference& method_ref,
+                                bool is_static,
+                                ArtMethod* method,
+                                InlineMethod* result)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+  static bool AnalyseIPutMethod(const DexFile::CodeItem* code_item,
+                                const MethodReference& method_ref,
+                                bool is_static,
+                                ArtMethod* method,
+                                InlineMethod* result)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Can we fast path instance field access in a verified accessor?
+  // If yes, computes field's offset and volatility and whether the method is static or not.
+  static bool ComputeSpecialAccessorInfo(ArtMethod* method,
+                                         uint32_t field_idx,
+                                         bool is_put,
+                                         InlineIGetIPutData* result)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+};
+
+}  // namespace art
+
+#endif  // ART_COMPILER_DEX_INLINE_METHOD_ANALYSER_H_