Simplified large object allocation strategy.

src/x64/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 3820 matching lines @@
 }
 
 
 void MacroAssembler::Allocate(int object_size,
                               Register result,
                               Register result_end,
                               Register scratch,
                               Label* gc_required,
                               AllocationFlags flags) {
   ASSERT((flags & (RESULT_CONTAINS_TOP | SIZE_IN_WORDS)) == 0);
+  ASSERT(object_size <= Page::kMaxNonCodeHeapObjectSize);
   if (!FLAG_inline_new) {
     if (emit_debug_code()) {
       // Trash the registers to simulate an allocation failure.
       movl(result, Immediate(0x7091));
       if (result_end.is_valid()) {
         movl(result_end, Immediate(0x7191));
       }
       if (scratch.is_valid()) {
         movl(scratch, Immediate(0x7291));
       }
@@ skipping 842 matching lines @@
   j(greater, &no_memento_available);
   CompareRoot(MemOperand(scratch_reg, -AllocationMemento::kSize),
               Heap::kAllocationMementoMapRootIndex);
   bind(&no_memento_available);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64