[Interpreter] Add support for JS calls.

src/compiler/interpreter-assembler.cc

Index: src/compiler/interpreter-assembler.cc
diff --git a/src/compiler/interpreter-assembler.cc b/src/compiler/interpreter-assembler.cc
index d8266974a28220eddcf6da997716068286bcb4b5..a2536257f860f38080fc8a940851281a389d7439 100644
--- a/src/compiler/interpreter-assembler.cc
+++ b/src/compiler/interpreter-assembler.cc
@@ -102,7 +102,12 @@ Node* InterpreterAssembler::DispatchTableRawPointer() {
 
 
 Node* InterpreterAssembler::RegisterFrameOffset(Node* index) {
-  return raw_assembler_->WordShl(index, Int32Constant(kPointerSizeLog2));
+  return WordShl(index, kPointerSizeLog2);
+}
+
+
+Node* InterpreterAssembler::RegisterLocation(Node* reg_index) {
+  return IntPtrAdd(RegisterFileRawPointer(), RegisterFrameOffset(reg_index));
 }
 
 
@@ -122,8 +127,7 @@ Node* InterpreterAssembler::BytecodeOperand(int operand_index) {
   DCHECK_LT(operand_index, interpreter::Bytecodes::NumberOfOperands(bytecode_));
   return raw_assembler_->Load(
       kMachUint8, BytecodeArrayTaggedPointer(),
-      raw_assembler_->IntPtrAdd(BytecodeOffset(),
-                                Int32Constant(1 + operand_index)));
+      IntPtrAdd(BytecodeOffset(), Int32Constant(1 + operand_index)));
 }
 
 
@@ -131,8 +135,7 @@ Node* InterpreterAssembler::BytecodeOperandSignExtended(int operand_index) {
   DCHECK_LT(operand_index, interpreter::Bytecodes::NumberOfOperands(bytecode_));
   Node* load = raw_assembler_->Load(
       kMachInt8, BytecodeArrayTaggedPointer(),
-      raw_assembler_->IntPtrAdd(BytecodeOffset(),
-                                Int32Constant(1 + operand_index)));
+      IntPtrAdd(BytecodeOffset(), Int32Constant(1 + operand_index)));
   // Ensure that we sign extend to full pointer size
   if (kPointerSize == 8) {
     load = raw_assembler_->ChangeInt32ToInt64(load);
@@ -141,6 +144,13 @@ Node* InterpreterAssembler::BytecodeOperandSignExtended(int operand_index) {
 }
 
 
+Node* InterpreterAssembler::BytecodeOperandCount(int operand_index) {
+  DCHECK_EQ(interpreter::OperandType::kCount,
+            interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
+  return BytecodeOperand(operand_index);
+}
+
+
 Node* InterpreterAssembler::BytecodeOperandImm8(int operand_index) {
   DCHECK_EQ(interpreter::OperandType::kImm8,
             interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
@@ -197,12 +207,27 @@ Node* InterpreterAssembler::SmiUntag(Node* value) {
 }
 
 
+Node* InterpreterAssembler::IntPtrAdd(Node* a, Node* b) {
+  return raw_assembler_->IntPtrAdd(a, b);
+}
+
+
+Node* InterpreterAssembler::IntPtrSub(Node* a, Node* b) {
+  return raw_assembler_->IntPtrSub(a, b);
+}
+
+
+Node* InterpreterAssembler::WordShl(Node* value, int shift) {
+  return raw_assembler_->WordShl(value, Int32Constant(shift));
+}
+
+
 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)));
+  Node* entry_offset =
+      IntPtrAdd(IntPtrConstant(FixedArray::kHeaderSize - kHeapObjectTag),
+                WordShl(index, kPointerSizeLog2));
   return raw_assembler_->Load(kMachAnyTagged, constant_pool, entry_offset);
 }
 
@@ -236,6 +261,16 @@ Node* InterpreterAssembler::LoadTypeFeedbackVector() {
 }
 
 
+Node* InterpreterAssembler::CallJS(Node* function, Node* first_var_arg,
+                                   Node* last_var_arg) {
+  CallDescriptor* descriptor = Linkage::GetJSCallDescriptor(
+      zone(), false, 0, CallDescriptor::kHasVarArgs);
+  Node* context = LoadObjectField(function, JSFunction::kContextOffset);
+  return raw_assembler_->CallVarArgs(descriptor, function, &context,
+                                     first_var_arg, last_var_arg);
+}
+
+
 Node* InterpreterAssembler::CallIC(CallInterfaceDescriptor descriptor,
                                    Node* target, Node* arg1, Node* arg2,
                                    Node* arg3, Node* arg4) {
@@ -310,7 +345,7 @@ void InterpreterAssembler::Return() {
 
 
 Node* InterpreterAssembler::Advance(int delta) {
-  return raw_assembler_->IntPtrAdd(BytecodeOffset(), Int32Constant(delta));
+  return IntPtrAdd(BytecodeOffset(), Int32Constant(delta));
 }