Adding 'static const' for arg numbers used with CallCFunction.

src/x64/regexp-macro-assembler-x64.cc

 // Copyright 2009 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 317 matching lines @@
   } else {
     ASSERT(mode_ == UC16);
     // Save important/volatile registers before calling C function.
 #ifndef _WIN64
     // Caller save on Linux and callee save in Windows.
     __ push(rsi);
     __ push(rdi);
 #endif
     __ push(backtrack_stackpointer());
 
-    int num_arguments = 3;
+    static const int num_arguments = 3;
     __ PrepareCallCFunction(num_arguments);
 
     // Put arguments into parameter registers. Parameters are
     //   Address byte_offset1 - Address captured substring's start.
     //   Address byte_offset2 - Address of current character position.
     //   size_t byte_length - length of capture in bytes(!)
 #ifdef _WIN64
     // Compute and set byte_offset1 (start of capture).
     __ lea(rcx, Operand(rsi, rdx, times_1, 0));
     // Set byte_offset2.
@@ skipping 493 matching lines @@
 
     Label grow_failed;
     // Save registers before calling C function
 #ifndef _WIN64
     // Callee-save in Microsoft 64-bit ABI, but not in AMD64 ABI.
     __ push(rsi);
     __ push(rdi);
 #endif
 
     // Call GrowStack(backtrack_stackpointer())
-    int num_arguments = 2;
+    static const int num_arguments = 2;
     __ PrepareCallCFunction(num_arguments);
 #ifdef _WIN64
     // Microsoft passes parameters in rcx, rdx.
     // First argument, backtrack stackpointer, is already in rcx.
     __ lea(rdx, Operand(rbp, kStackHighEnd));  // Second argument
 #else
     // AMD64 ABI passes parameters in rdi, rsi.
     __ movq(rdi, backtrack_stackpointer());   // First argument.
     __ lea(rsi, Operand(rbp, kStackHighEnd));  // Second argument.
 #endif
@@ skipping 159 matching lines @@
   __ subq(rax, Operand(rbp, kStackHighEnd));
   __ movq(register_location(reg), rax);
 }
 
 
 // Private methods:
 
 void RegExpMacroAssemblerX64::CallCheckStackGuardState() {
   // This function call preserves no register values. Caller should
   // store anything volatile in a C call or overwritten by this function.
-  int num_arguments = 3;
+  static const int num_arguments = 3;
   __ PrepareCallCFunction(num_arguments);
 #ifdef _WIN64
   // Second argument: Code* of self. (Do this before overwriting r8).
   __ movq(rdx, code_object_pointer());
   // Third argument: RegExp code frame pointer.
   __ movq(r8, rbp);
   // First argument: Next address on the stack (will be address of
   // return address).
   __ lea(rcx, Operand(rsp, -kPointerSize));
 #else
@@ skipping 251 matching lines @@
                  Operand(rsi, rdi, times_1, cp_offset * sizeof(uc16)));
     }
   }
 }
 
 #undef __
 
 #endif  // V8_NATIVE_REGEXP
 
 }}  // namespace v8::internal