Removing redundant stub for runtime native calls.

src/x64/codegen-x64.cc

 // Copyright 2010 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 2194 matching lines @@
 }
 
 
 void CodeGenerator::VisitDebuggerStatement(DebuggerStatement* node) {
   ASSERT(!in_spilled_code());
   Comment cmnt(masm_, "[ DebuggerStatement");
   CodeForStatementPosition(node);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // Spill everything, even constants, to the frame.
   frame_->SpillAll();
-  frame_->CallRuntime(Runtime::kDebugBreak, 0);
+
+  DebugerStatementStub ces;
+  frame_->CallStub(&ces, 0);
   // Ignore the return value.
 #endif
 }
 
 
 void CodeGenerator::InstantiateBoilerplate(Handle<JSFunction> boilerplate) {
   ASSERT(boilerplate->IsBoilerplate());
 
   // The inevitable call will sync frame elements to memory anyway, so
   // we do it eagerly to allow us to push the arguments directly into
@@ skipping 5104 matching lines @@
            Operand(rdx, ArgumentsAdaptorFrameConstants::kLengthOffset));
   __ ret(0);
 }
 
 
 int CEntryStub::MinorKey() {
   ASSERT(result_size_ <= 2);
 #ifdef _WIN64
   // Simple results returned in rax (using default code).
   // Complex results must be written to address passed as first argument.
-  // Use even numbers for minor keys, reserving the odd numbers for
-  // CEntryDebugBreakStub.
-  return (result_size_ < 2) ? 0 : result_size_ * 2;
+  return (result_size_ < 2) ? 0 : 1;
 #else
   // Single results returned in rax (both AMD64 and Win64 calling conventions)
   // and a struct of two pointers in rax+rdx (AMD64 calling convention only)
   // by default.
   return 0;
 #endif
 }
 
 
 void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) {
@@ skipping 1854 matching lines @@
   // Call the function from C++.
   return FUNCTION_CAST<ModuloFunction>(buffer);
 }
 
 #endif
 
 
 #undef __
 
 } }  // namespace v8::internal