Allign Intel macro assemblers with changes to ARM macro assembler

src/ia32/macro-assembler-ia32.cc

 // Copyright 2006-2009 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 613 matching lines @@
                                              Register result_end,
                                              Register scratch,
                                              AllocationFlags flags) {
   ExternalReference new_space_allocation_top =
       ExternalReference::new_space_allocation_top_address();
 
   // Just return if allocation top is already known.
   if ((flags & RESULT_CONTAINS_TOP) != 0) {
     // No use of scratch if allocation top is provided.
     ASSERT(scratch.is(no_reg));
+#ifdef DEBUG
+    // Assert that result actually contains top on entry.
+    cmp(result, Operand::StaticVariable(new_space_allocation_top));
+    Check(equal, "Unexpected allocation top");
+#endif
     return;
   }
 
   // Move address of new object to result. Use scratch register if available.
   if (scratch.is(no_reg)) {
     mov(result, Operand::StaticVariable(new_space_allocation_top));
   } else {
     ASSERT(!scratch.is(result_end));
     mov(Operand(scratch), Immediate(new_space_allocation_top));
     mov(result, Operand(scratch, 0));
@@ skipping 533 matching lines @@
   // Indicate that code has changed.
   CPU::FlushICache(address_, size_);
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 
 } }  // namespace v8::internal