MIPS: Merge cellspace into old pointer space.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 5191e3659631741ffb117c8d2b707a5f46264e6b..e77aaf626f3f1befb678ea934c725f521cc6c622 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -1468,6 +1468,13 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
     // 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 cell payload. Calculate the start of the object.
+    __ Subu(scratch, 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.