[Interpreter] Optimize BytecodeArrayBuilder and BytecodeArrayWriter.

src/interpreter/bytecode-array-builder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecode-array-writer.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 291 matching lines @@
   // entry, so that it can be referenced by above exception handling support.
   int NewHandlerEntry() { return handler_table_builder()->NewHandlerEntry(); }
 
   // Allocates a slot in the constant pool which can later be inserted.
   size_t AllocateConstantPoolEntry();
   // Inserts a entry into an allocated constant pool entry.
   void InsertConstantPoolEntryAt(size_t entry, Handle<Object> object);
 
   void InitializeReturnPosition(FunctionLiteral* literal);
 
-  void SetStatementPosition(Statement* stmt);
-  void SetExpressionPosition(Expression* expr);
-  void SetExpressionAsStatementPosition(Expression* expr);
+  void SetStatementPosition(Statement* stmt) {
+    if (stmt->position() == kNoSourcePosition) return;
+    latest_source_info_.MakeStatementPosition(stmt->position());
+  }
+
+  void SetExpressionPosition(Expression* expr) {
+    if (expr->position() == kNoSourcePosition) return;
+    if (!latest_source_info_.is_statement()) {
+      // Ensure the current expression position is overwritten with the
+      // latest value.
+      latest_source_info_.MakeExpressionPosition(expr->position());
+    }
+  }
+
+  void SetExpressionAsStatementPosition(Expression* expr) {
+    if (expr->position() == kNoSourcePosition) return;
+    latest_source_info_.MakeStatementPosition(expr->position());
+  }
 
   // Accessors
   TemporaryRegisterAllocator* temporary_register_allocator() {
     return &temporary_allocator_;
   }
   const TemporaryRegisterAllocator* temporary_register_allocator() const {
     return &temporary_allocator_;
   }
   Zone* zone() const { return zone_; }
 
@@ skipping 13 matching lines @@
   }
 
   static uint32_t UnsignedOperand(size_t value) {
     DCHECK_LE(value, kMaxUInt32);
     return static_cast<uint32_t>(value);
   }
 
  private:
   friend class BytecodeRegisterAllocator;
 
-  static Bytecode BytecodeForBinaryOperation(Token::Value op);
-  static Bytecode BytecodeForCountOperation(Token::Value op);
-  static Bytecode BytecodeForCompareOperation(Token::Value op);
-  static Bytecode BytecodeForStoreNamedProperty(LanguageMode language_mode);
-  static Bytecode BytecodeForStoreKeyedProperty(LanguageMode language_mode);
-  static Bytecode BytecodeForLoadGlobal(TypeofMode typeof_mode);
-  static Bytecode BytecodeForStoreGlobal(LanguageMode language_mode);
-  static Bytecode BytecodeForStoreLookupSlot(LanguageMode language_mode);
-  static Bytecode BytecodeForCreateArguments(CreateArgumentsType type);
-  static Bytecode BytecodeForDelete(LanguageMode language_mode);
-  static Bytecode BytecodeForCall(TailCallMode tail_call_mode);
+  INLINE(void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
+                     uint32_t operand2, uint32_t operand3));
+  INLINE(void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
+                     uint32_t operand2));
+  INLINE(void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1));
+  INLINE(void Output(Bytecode bytecode, uint32_t operand0));
+  INLINE(void Output(Bytecode bytecode));
 
-  void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
-              uint32_t operand2, uint32_t operand3);
-  void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1,
-              uint32_t operand2);
-  void Output(Bytecode bytecode, uint32_t operand0, uint32_t operand1);
-  void Output(Bytecode bytecode, uint32_t operand0);
-  void Output(Bytecode bytecode);
-
-  BytecodeArrayBuilder& OutputJump(BytecodeNode* node, BytecodeLabel* label);
+  INLINE(void OutputJump(Bytecode bytecode, BytecodeLabel* label));
+  INLINE(void OutputJump(Bytecode bytecode, uint32_t operand0,
+                         BytecodeLabel* label));
 
   bool RegisterIsValid(Register reg) const;
   bool OperandsAreValid(Bytecode bytecode, int operand_count,
                         uint32_t operand0 = 0, uint32_t operand1 = 0,
                         uint32_t operand2 = 0, uint32_t operand3 = 0) const;
 
-  // Attach latest source position to |node|.
-  void AttachSourceInfo(BytecodeNode* node);
-
   // Set position for return.
   void SetReturnPosition();
 
   // Gets a constant pool entry for the |object|.
   size_t GetConstantPoolEntry(Handle<Object> object);
 
   // Not implemented as the illegal bytecode is used inside internally
   // to indicate a bytecode field is not valid or an error has occured
   // during bytecode generation.
   BytecodeArrayBuilder& Illegal();
@@ skipping 31 matching lines @@
   static int const kNoFeedbackSlot = 0;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeArrayBuilder);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_