[Interpreter] Add support for loading literals from the constant pool.

src/compiler/interpreter-assembler.cc

 // 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.
 
 #include "src/compiler/interpreter-assembler.h"
 
 #include <ostream>
 
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction-selector.h"
@@ skipping 129 matching lines @@
 }
 
 
 Node* InterpreterAssembler::BytecodeOperandImm8(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kImm8,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
   return BytecodeOperandSignExtended(operand_index);
 }
 
 
+Node* InterpreterAssembler::BytecodeOperandIdx(int operand_index) {
+  DCHECK_EQ(interpreter::OperandType::kIdx,
+            interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
+  return BytecodeOperand(operand_index);
+}
+
+
 Node* InterpreterAssembler::BytecodeOperandReg(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kReg,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
   return BytecodeOperandSignExtended(operand_index);
 }
 
 
 Node* InterpreterAssembler::Int32Constant(int value) {
   return raw_assembler_->Int32Constant(value);
 }
@@ skipping 22 matching lines @@
 Node* InterpreterAssembler::SmiTag(Node* value) {
   return raw_assembler_->WordShl(value, SmiShiftBitsConstant());
 }
 
 
 Node* InterpreterAssembler::SmiUntag(Node* value) {
   return raw_assembler_->WordSar(value, SmiShiftBitsConstant());
 }
 
 
+Node* InterpreterAssembler::LoadConstantPoolEntry(Node* index) {
+  Node* constant_pool = LoadObjectField(BytecodeArrayTaggedPointer(),
+                                        BytecodeArray::kConstantPoolOffset);
+  Node* entry_offset = raw_assembler_->IntPtrAdd(
+      IntPtrConstant(FixedArray::kHeaderSize - kHeapObjectTag),
+      raw_assembler_->WordShl(index, Int32Constant(kPointerSizeLog2)));
+  return raw_assembler_->Load(kMachAnyTagged, constant_pool, entry_offset);
+}
+
+
 Node* InterpreterAssembler::LoadObjectField(Node* object, int offset) {
   return raw_assembler_->Load(kMachAnyTagged, object,
                               IntPtrConstant(offset - kHeapObjectTag));
 }
 
 
 Node* InterpreterAssembler::LoadContextSlot(Node* context, int slot_index) {
   return raw_assembler_->Load(kMachAnyTagged, context,
                               IntPtrConstant(Context::SlotOffset(slot_index)));
 }
@@ skipping 128 matching lines @@
   return raw_assembler_->schedule();
 }
 
 
 Zone* InterpreterAssembler::zone() { return raw_assembler_->zone(); }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8