[turbofan] Implement the call protocol properly for direct calls.

src/x87/macro-assembler-x87.h

 // Copyright 2012 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.
 
 #ifndef V8_X87_MACRO_ASSEMBLER_X87_H_
 #define V8_X87_MACRO_ASSEMBLER_X87_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
 #include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
 // Give alias names to registers for calling conventions.
 const Register kReturnRegister0 = {Register::kCode_eax};
 const Register kReturnRegister1 = {Register::kCode_edx};
 const Register kJSFunctionRegister = {Register::kCode_edi};
 const Register kContextRegister = {Register::kCode_esi};
 const Register kInterpreterAccumulatorRegister = {Register::kCode_eax};
 const Register kInterpreterRegisterFileRegister = {Register::kCode_edx};
 const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_ecx};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_edi};
+const Register kJavaScriptCallArgCountRegister = {Register::kCode_eax};
 const Register kRuntimeCallFunctionRegister = {Register::kCode_ebx};
 const Register kRuntimeCallArgCountRegister = {Register::kCode_eax};
 
 // Spill slots used by interpreter dispatch calling convention.
 const int kInterpreterDispatchTableSpillSlot = -1;
 
 // Convenience for platform-independent signatures.  We do not normally
 // distinguish memory operands from other operands on ia32.
 typedef Operand MemOperand;
 
@@ skipping 1050 matching lines @@
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X87_MACRO_ASSEMBLER_X87_H_