[runtime] Store constructor function index on primitive maps.

src/mips/builtins-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
 
@@ skipping 422 matching lines @@
       __ LoadRoot(t7, Heap::kUndefinedValueRootIndex);
 
       if (!is_api_function) {
         Label no_inobject_slack_tracking;
 
         // Check if slack tracking is enabled.
         __ Branch(&no_inobject_slack_tracking, lt, t2,
                   Operand(Map::kSlackTrackingCounterEnd));
 
         // Allocate object with a slack.
-        __ lbu(a0, FieldMemOperand(a2, Map::kInObjectPropertiesOffset));
+        __ lbu(
+            a0,
+            FieldMemOperand(
+                a2, Map::kInObjectPropertiesOrConstructorFunctionIndexOffset));
         __ lbu(a2, FieldMemOperand(a2, Map::kUnusedPropertyFieldsOffset));
         __ subu(a0, a0, a2);
         __ sll(at, a0, kPointerSizeLog2);
         __ addu(a0, t5, at);
         // a0: offset of first field after pre-allocated fields
         if (FLAG_debug_code) {
           __ sll(at, a3, kPointerSizeLog2);
           __ Addu(t6, t4, Operand(at));   // End of object.
           __ Assert(le, kUnexpectedNumberOfPreAllocatedPropertyFields,
               a0, Operand(t6));
@@ skipping 1419 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS