MIPS: Track heap objects.

src/mips/lithium-codegen-mips.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 3893 matching lines @@
   int offset = instr->offset();
 
   Handle<Map> transition = instr->transition();
 
   if (FLAG_track_fields && representation.IsSmi()) {
     Register value = ToRegister(instr->value());
     __ SmiTagCheckOverflow(value, value, scratch);
     if (!instr->hydrogen()->value()->range()->IsInSmiRange()) {
       DeoptimizeIf(lt, instr->environment(), scratch, Operand(zero_reg));
     }
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    Register value = ToRegister(instr->value());
+    if (!instr->hydrogen()->value()->type().IsHeapObject()) {
+      __ And(scratch, value, Operand(kSmiTagMask));
+      DeoptimizeIf(eq, instr->environment(), scratch, Operand(zero_reg));
+    }
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     ASSERT(transition.is_null());
     ASSERT(instr->is_in_object());
     ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
     DoubleRegister value = ToDoubleRegister(instr->value());
     __ sdc1(value, FieldMemOperand(object, offset));
     return;
   }
 
   if (!transition.is_null()) {
@@ skipping 1730 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal