[interpreter] Unify meaning of register count operands.

src/compiler/bytecode-graph-builder.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/bytecode-graph-builder.h"
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 1093 matching lines @@
   ConvertReceiverMode receiver_hint = ConvertReceiverMode::kAny;
   Node* callee =
       environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
   interpreter::Register receiver = bytecode_iterator().GetRegisterOperand(1);
   size_t arg_count = bytecode_iterator().GetCountOperand(2);
   VectorSlotPair feedback =
       CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(3));
 
   // TODO(ishell): provide correct tail_call_mode value to CallFunction.
   const Operator* call = javascript()->CallFunction(
-      arg_count + 2, language_mode(), feedback, receiver_hint);
-  Node* value = ProcessCallArguments(call, callee, receiver, arg_count + 2);
+      arg_count + 1, language_mode(), feedback, receiver_hint);
+  Node* value = ProcessCallArguments(call, callee, receiver, arg_count + 1);
   environment()->BindAccumulator(value, &states);
 }
 
 void BytecodeGraphBuilder::VisitCall() { BuildCall(); }
 
 void BytecodeGraphBuilder::VisitCallWide() { BuildCall(); }
 
 void BytecodeGraphBuilder::BuildCallJSRuntime() {
   FrameStateBeforeAndAfter states(this);
   Node* callee =
       BuildLoadNativeContextField(bytecode_iterator().GetIndexOperand(0));
   interpreter::Register receiver = bytecode_iterator().GetRegisterOperand(1);
   size_t arg_count = bytecode_iterator().GetCountOperand(2);
 
   // Create node to perform the JS runtime call.
   const Operator* call =
-      javascript()->CallFunction(arg_count + 2, language_mode());
-  Node* value = ProcessCallArguments(call, callee, receiver, arg_count + 2);
+      javascript()->CallFunction(arg_count + 1, language_mode());
+  Node* value = ProcessCallArguments(call, callee, receiver, arg_count + 1);
   environment()->BindAccumulator(value, &states);
 }
 
 void BytecodeGraphBuilder::VisitCallJSRuntime() { BuildCallJSRuntime(); }
 
 void BytecodeGraphBuilder::VisitCallJSRuntimeWide() { BuildCallJSRuntime(); }
 
 Node* BytecodeGraphBuilder::ProcessCallRuntimeArguments(
     const Operator* call_runtime_op, interpreter::Register first_arg,
     size_t arity) {
@@ skipping 684 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8