Reland "Merge cellspace into old pointer space"

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 1441 matching lines @@
     DCHECK(HasArgsInRegisters());
     // Patch the (relocated) inlined map check.
 
     // The offset was stored in t0 safepoint slot.
     // (See LCodeGen::DoDeferredLInstanceOfKnownGlobal).
     __ LoadFromSafepointRegisterSlot(scratch, t0);
     __ Subu(inline_site, ra, scratch);
     // Get the map location in scratch and patch it.
     __ GetRelocatedValue(inline_site, scratch, v1);  // v1 used as scratch.
     __ sw(map, FieldMemOperand(scratch, Cell::kValueOffset));
+
+    __ mov(t4, map);
+    // |scratch| points at the beginning of the cell. Calculate the field
+    // containing the map.
+    __ Addu(function, scratch, Operand(Cell::kValueOffset - 1));
+    __ RecordWriteField(scratch, Cell::kValueOffset, t4, function,
+                        kRAHasNotBeenSaved, kDontSaveFPRegs,
+                        OMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
   }
 
   // Register mapping: a3 is object map and t0 is function prototype.
   // Get prototype of object into a2.
   __ lw(scratch, FieldMemOperand(map, Map::kPrototypeOffset));
 
   // We don't need map any more. Use it as a scratch register.
   Register scratch2 = map;
   map = no_reg;
 
@@ skipping 4031 matching lines @@
                            kStackUnwindSpace, kInvalidStackOffset,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS