Fix the GC branch so it compiles and runs on 64 bit.

src/x64/full-codegen-x64.cc

 // Copyright 2011 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 675 matching lines @@
           // Check if we have the correct context pointer.
           __ movq(rbx, ContextOperand(rsi, Context::FCONTEXT_INDEX));
           __ cmpq(rbx, rsi);
           __ Check(equal, "Unexpected declaration in current context.");
         }
         if (mode == Variable::CONST) {
           __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex);
           __ movq(ContextOperand(rsi, slot->index()), kScratchRegister);
           // No write barrier since the hole value is in old space.
         } else if (function != NULL) {
+          // We know that we have written a function, which is not a smi.
           VisitForAccumulatorValue(function);
           __ movq(ContextOperand(rsi, slot->index()), result_register());
           int offset = Context::SlotOffset(slot->index());
           __ movq(rbx, rsi);
-          __ RecordWrite(rbx, offset, result_register(), rcx, kDontSaveFPRegs);
+          __ RecordWrite(rbx,
+                         offset,
+                         result_register(),
+                         rcx,
+                         kDontSaveFPRegs,
+                         EMIT_REMEMBERED_SET,
+                         OMIT_SMI_CHECK);
         }
         break;
 
       case Slot::LOOKUP: {
         __ push(rsi);
         __ Push(variable->name());
         // Declaration nodes are always introduced in one of two modes.
         ASSERT(mode == Variable::VAR || mode == Variable::CONST);
         PropertyAttributes attr = (mode == Variable::VAR) ? NONE : READ_ONLY;
         __ Push(Smi::FromInt(attr));
@@ skipping 1128 matching lines @@
         __ movq(Operand(rbp, SlotOffset(slot)), rax);
         break;
       case Slot::CONTEXT: {
         __ movq(rcx, ContextOperand(rsi, Context::FCONTEXT_INDEX));
         __ movq(rdx, ContextOperand(rcx, slot->index()));
         __ CompareRoot(rdx, Heap::kTheHoleValueRootIndex);
         __ j(not_equal, &skip);
         __ movq(ContextOperand(rcx, slot->index()), rax);
         int offset = Context::SlotOffset(slot->index());
         __ movq(rdx, rax);  // Preserve the stored value in eax.
-        __ RecordWrite(rcx, offset, rdx, rbx);
+        __ RecordWrite(rcx, offset, rdx, rbx, kDontSaveFPRegs);
         break;
       }
       case Slot::LOOKUP:
         __ push(rax);
         __ push(rsi);
         __ Push(var->name());
         __ CallRuntime(Runtime::kInitializeConstContextSlot, 3);
         break;
     }
     __ bind(&skip);
@@ skipping 1272 matching lines @@
   // Swap elements.  Use object and temp as scratch registers.
   __ movq(object, Operand(index_1, 0));
   __ movq(temp,   Operand(index_2, 0));
   __ movq(Operand(index_2, 0), object);
   __ movq(Operand(index_1, 0), temp);
 
   Label new_space;
   __ InNewSpace(elements, temp, equal, &new_space);
 
   __ movq(object, elements);
-  __ RecordWriteHelper(object, index_1, temp);
-  __ RecordWriteHelper(elements, index_2, temp);
+  __ RecordWriteHelper(object, index_1, temp, kDontSaveFPRegs);
+  __ RecordWriteHelper(elements, index_2, temp, kDontSaveFPRegs);
 
   __ bind(&new_space);
   // We are done. Drop elements from the stack, and return undefined.
   __ addq(rsp, Immediate(3 * kPointerSize));
   __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
   __ jmp(&done);
 
   __ bind(&slow_case);
   __ CallRuntime(Runtime::kSwapElements, 3);
 
@@ skipping 1150 matching lines @@
   __ ret(0);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64