Use StackArgumenstAccessor and kPCOnStackSize/kFPOnStackSize to compute stack address/operand

src/x64/full-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 122 matching lines @@
 #endif
 
   // Strict mode functions and builtins need to replace the receiver
   // with undefined when called as functions (without an explicit
   // receiver object). rcx is zero for method calls and non-zero for
   // function calls.
   if (!info->is_classic_mode() || info->is_native()) {
     Label ok;
     __ testq(rcx, rcx);
     __ j(zero, &ok, Label::kNear);
-    // +1 for return address.
-    int receiver_offset = (info->scope()->num_parameters() + 1) * kPointerSize;
+    StackArgumentsAccessor args(rsp, info->scope()->num_parameters());
     __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex);
-    __ movq(Operand(rsp, receiver_offset), kScratchRegister);
+    __ movq(args.GetReceiverOperand(), kScratchRegister);
     __ bind(&ok);
   }
 
   // Open a frame scope to indicate that there is a frame on the stack.  The
   // MANUAL indicates that the scope shouldn't actually generate code to set up
   // the frame (that is done below).
   FrameScope frame_scope(masm_, StackFrame::MANUAL);
 
   info->set_prologue_offset(masm_->pc_offset());
   __ push(rbp);  // Caller's frame pointer.
@@ skipping 514 matching lines @@
   }
 }
 
 
 MemOperand FullCodeGenerator::StackOperand(Variable* var) {
   ASSERT(var->IsStackAllocated());
   // Offset is negative because higher indexes are at lower addresses.
   int offset = -var->index() * kPointerSize;
   // Adjust by a (parameter or local) base offset.
   if (var->IsParameter()) {
-    offset += (info_->scope()->num_parameters() + 1) * kPointerSize;
+    offset += kFPOnStackSize + kPCOnStackSize +
+              (info_->scope()->num_parameters() - 1) * kPointerSize;
   } else {
     offset += JavaScriptFrameConstants::kLocal0Offset;
   }
   return Operand(rbp, offset);
 }
 
 
 MemOperand FullCodeGenerator::VarOperand(Variable* var, Register scratch) {
   ASSERT(var->IsContextSlot() || var->IsStackAllocated());
   if (var->IsContextSlot()) {
@@ skipping 1939 matching lines @@
 
 void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
   // Push copy of the first argument or undefined if it doesn't exist.
   if (arg_count > 0) {
     __ push(Operand(rsp, arg_count * kPointerSize));
   } else {
     __ PushRoot(Heap::kUndefinedValueRootIndex);
   }
 
   // Push the receiver of the enclosing function and do runtime call.
-  __ push(Operand(rbp, (2 + info_->scope()->num_parameters()) * kPointerSize));
+  StackArgumentsAccessor args(rbp, info_->scope()->num_parameters());
+  __ push(args.GetReceiverOperand());
 
   // Push the language mode.
   __ Push(Smi::FromInt(language_mode()));
 
   // Push the start position of the scope the calls resides in.
   __ Push(Smi::FromInt(scope()->start_position()));
 
   // Do the runtime call.
   __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5);
 }
@@ skipping 2224 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64