Use RegisterSize to count the pushq size and the argument slot size from JS to C++

src/x64/regexp-macro-assembler-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 674 matching lines @@
   __ movq(Operand(rbp, kStartIndex), rdx);  // Passed as int32 in edx.
   __ movq(Operand(rbp, kInputStart), r8);
   __ movq(Operand(rbp, kInputEnd), r9);
   // Callee-save on Win64.
   __ pushq(rsi);
   __ pushq(rdi);
   __ pushq(rbx);
 #else
   // GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9 (and then on stack).
   // Push register parameters on stack for reference.
-  ASSERT_EQ(kInputString, -1 * kPointerSize);
-  ASSERT_EQ(kStartIndex, -2 * kPointerSize);
-  ASSERT_EQ(kInputStart, -3 * kPointerSize);
-  ASSERT_EQ(kInputEnd, -4 * kPointerSize);
-  ASSERT_EQ(kRegisterOutput, -5 * kPointerSize);
-  ASSERT_EQ(kNumOutputRegisters, -6 * kPointerSize);
+  ASSERT_EQ(kInputString, -1 * kRegisterSize);
+  ASSERT_EQ(kStartIndex, -2 * kRegisterSize);
+  ASSERT_EQ(kInputStart, -3 * kRegisterSize);
+  ASSERT_EQ(kInputEnd, -4 * kRegisterSize);
+  ASSERT_EQ(kRegisterOutput, -5 * kRegisterSize);
+  ASSERT_EQ(kNumOutputRegisters, -6 * kRegisterSize);
   __ pushq(rdi);
   __ pushq(rsi);
   __ pushq(rdx);
   __ pushq(rcx);
   __ pushq(r8);
   __ pushq(r9);
 
   __ pushq(rbx);  // Callee-save
 #endif
 
@@ skipping 728 matching lines @@
   }
 }
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64