[interpreter] Introduce bytecode generation pipeline.

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 13a9cc2c0b75634a6328e593f346730bfd39d650..21590baeea932ea2d813715fd76155104f8b83a3 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -7,6 +7,7 @@
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecode-register-allocator.h"
+#include "src/interpreter/bytecode-writer.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/interpreter/constant-array-builder.h"
 #include "src/interpreter/handler-table-builder.h"
@@ -270,17 +271,10 @@ class BytecodeArrayBuilder final : public ZoneObject {
     return &temporary_allocator_;
   }
 
-  void EnsureReturn();
-
-  static OperandScale OperandSizesToScale(
-      OperandSize size0, OperandSize size1 = OperandSize::kByte,
-      OperandSize size2 = OperandSize::kByte,
-      OperandSize size3 = OperandSize::kByte);
+  BytecodeWriter* writer() { return writer_; }
+  void set_writer(BytecodeWriter* writer) { writer_ = writer; }
 
-  static OperandSize SizeForRegisterOperand(Register reg);
-  static OperandSize SizeForSignedOperand(int value);
-  static OperandSize SizeForUnsignedOperand(int value);
-  static OperandSize SizeForUnsignedOperand(size_t value);
+  void EnsureReturn();
 
   static uint32_t RegisterOperand(Register reg);
   static Register RegisterFromOperand(uint32_t operand);
@@ -289,7 +283,6 @@ class BytecodeArrayBuilder final : public ZoneObject {
   static uint32_t UnsignedOperand(size_t value);
 
  private:
-  class PreviousBytecodeHelper;
   friend class BytecodeRegisterAllocator;
 
   static Bytecode BytecodeForBinaryOperation(Token::Value op);
@@ -307,9 +300,6 @@ class BytecodeArrayBuilder final : public ZoneObject {
   static Bytecode GetJumpWithConstantOperand(Bytecode jump_smi8_operand);
   static Bytecode GetJumpWithToBoolean(Bytecode jump_smi8_operand);
 
-  template <size_t N>
-  INLINE(void Output(Bytecode bytecode, uint32_t (&operands)[N],
-                     OperandScale operand_scale = OperandScale::kSingle));
   void Output(Bytecode bytecode);
   void OutputScaled(Bytecode bytecode, OperandScale operand_scale,
                     uint32_t operand0, uint32_t operand1, uint32_t operand2,
@@ -323,14 +313,14 @@ class BytecodeArrayBuilder final : public ZoneObject {
 
   BytecodeArrayBuilder& OutputJump(Bytecode jump_bytecode,
                                    BytecodeLabel* label);
-  void PatchJump(const ZoneVector<uint8_t>::iterator& jump_target,
-                 const ZoneVector<uint8_t>::iterator& jump_location);
-  void PatchIndirectJumpWith8BitOperand(
-      const ZoneVector<uint8_t>::iterator& jump_location, int delta);
-  void PatchIndirectJumpWith16BitOperand(
-      const ZoneVector<uint8_t>::iterator& jump_location, int delta);
-  void PatchIndirectJumpWith32BitOperand(
-      const ZoneVector<uint8_t>::iterator& jump_location, int delta);
+  void PatchJump(ZoneVector<uint8_t>* bytecodes, size_t jump_target,
+                 size_t jump_location);
+  void PatchJumpWith8BitOperand(ZoneVector<uint8_t>* bytecodes,
+                                size_t jump_location, int delta);
+  void PatchJumpWith16BitOperand(ZoneVector<uint8_t>* bytecodes,
+                                 size_t jump_location, int delta);
+  void PatchJumpWith32BitOperand(ZoneVector<uint8_t>* bytecodes,
+                                 size_t jump_location, int delta);
 
   void LeaveBasicBlock();
 
@@ -338,18 +328,12 @@ class BytecodeArrayBuilder final : public ZoneObject {
                       int operand_index, uint32_t operand_value) const;
   bool RegisterIsValid(Register reg, OperandSize reg_size) const;
 
-  bool LastBytecodeInSameBlock() const;
-  bool NeedToBooleanCast();
-  bool IsRegisterInAccumulator(Register reg);
-
   // Set position for return.
   void SetReturnPosition();
 
   // Gets a constant pool entry for the |object|.
   size_t GetConstantPoolEntry(Handle<Object> object);
 
-  ZoneVector<uint8_t>* bytecodes() { return &bytecodes_; }
-  const ZoneVector<uint8_t>* bytecodes() const { return &bytecodes_; }
   Isolate* isolate() const { return isolate_; }
   ConstantArrayBuilder* constant_array_builder() {
     return &constant_array_builder_;
@@ -363,16 +347,20 @@ class BytecodeArrayBuilder final : public ZoneObject {
   SourcePositionTableBuilder* source_position_table_builder() {
     return &source_position_table_builder_;
   }
+  BytecodeNodeAllocator* bytecode_node_allocator() {
+    return &bytecode_node_allocator_;
+  }
+  BytecodeNode* current_node() { return current_node_; }
+  FinalStageBytecodeWriter* final_stage_writer() {
+    return &final_stage_writer_;
+  }
 
   Isolate* isolate_;
   Zone* zone_;
-  ZoneVector<uint8_t> bytecodes_;
   bool bytecode_generated_;
   ConstantArrayBuilder constant_array_builder_;
   HandlerTableBuilder handler_table_builder_;
   SourcePositionTableBuilder source_position_table_builder_;
-  size_t last_block_end_;
-  size_t last_bytecode_start_;
   bool exit_seen_in_block_;
   int unbound_jumps_;
   int parameter_count_;
@@ -380,6 +368,10 @@ class BytecodeArrayBuilder final : public ZoneObject {
   int context_register_count_;
   int return_position_;
   TemporaryRegisterAllocator temporary_allocator_;
+  BytecodeNodeAllocator bytecode_node_allocator_;
+  FinalStageBytecodeWriter final_stage_writer_;
+  BytecodeWriter* writer_;
+  BytecodeNode* current_node_;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeArrayBuilder);
 };