Implement proper map checks of captured 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 5091 matching lines @@
       DeoptimizeIf(tag == 0 ? ne : eq, instr->environment(),
           at, Operand(zero_reg));
     } else {
       __ And(scratch, scratch, Operand(mask));
       DeoptimizeIf(ne, instr->environment(), scratch, Operand(tag));
     }
   }
 }
 
 
-void LCodeGen::DoCheckFunction(LCheckFunction* instr) {
+void LCodeGen::DoCheckValue(LCheckValue* instr) {
   Register reg = ToRegister(instr->value());
-  Handle<JSFunction> target = instr->hydrogen()->target();
+  Handle<HeapObject> object = instr->hydrogen()->object();
   AllowDeferredHandleDereference smi_check;
-  if (isolate()->heap()->InNewSpace(*target)) {
+  if (isolate()->heap()->InNewSpace(*object)) {
     Register reg = ToRegister(instr->value());
-    Handle<Cell> cell = isolate()->factory()->NewCell(target);
+    Handle<Cell> cell = isolate()->factory()->NewCell(object);
     __ li(at, Operand(Handle<Object>(cell)));
     __ lw(at, FieldMemOperand(at, Cell::kValueOffset));
     DeoptimizeIf(ne, instr->environment(), reg,
                  Operand(at));
   } else {
     DeoptimizeIf(ne, instr->environment(), reg,
-                 Operand(target));
+                 Operand(object));
   }
 }
 
 
 void LCodeGen::DoDeferredInstanceMigration(LCheckMaps* instr, Register object) {
   {
     PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
     __ push(object);
     CallRuntimeFromDeferred(Runtime::kMigrateInstance, 1, instr);
     __ StoreToSafepointRegisterSlot(v0, scratch0());
@@ skipping 659 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal