Remove special CheckEquals function for intptr_t on X64 platform.

src/x64/codegen-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 6558 matching lines @@
         Label not_smis;
         ASSERT_EQ(0, kSmiTag);
         ASSERT_EQ(0, Smi::FromInt(0));
         __ movq(rcx, Immediate(kSmiTagMask));
         __ and_(rcx, rax);
         __ testq(rcx, rdx);
         __ j(not_zero, &not_smis);
         // One operand is a smi.
 
         // Check whether the non-smi is a heap number.
-        ASSERT_EQ(static_cast<intptr_t>(1), kSmiTagMask);
+        ASSERT_EQ(1, static_cast<int>(kSmiTagMask));
         // rcx still holds rax & kSmiTag, which is either zero or one.
         __ decq(rcx);  // If rax is a smi, all 1s, else all 0s.
         __ movq(rbx, rdx);
         __ xor_(rbx, rax);
         __ and_(rbx, rcx);  // rbx holds either 0 or rax ^ rdx.
         __ xor_(rbx, rax);
         // if rax was smi, rbx is now rdx, else rax.
 
         // Check if the non-smi operand is a heap number.
         __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset),
@@ skipping 1314 matching lines @@
 int CompareStub::MinorKey() {
   // Encode the two parameters in a unique 16 bit value.
   ASSERT(static_cast<unsigned>(cc_) < (1 << 15));
   return (static_cast<unsigned>(cc_) << 1) | (strict_ ? 1 : 0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal