Implement proper map checks of captured objects.

src/ia32/lithium-codegen-ia32.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 5774 matching lines @@
     } else {
       __ movzx_b(temp, FieldOperand(temp, Map::kInstanceTypeOffset));
       __ and_(temp, mask);
       __ cmp(temp, tag);
       DeoptimizeIf(not_equal, instr->environment());
     }
   }
 }
 
 
-void LCodeGen::DoCheckFunction(LCheckFunction* instr) {
-  Handle<JSFunction> target = instr->hydrogen()->target();
-  if (instr->hydrogen()->target_in_new_space()) {
+void LCodeGen::DoCheckValue(LCheckValue* instr) {
+  Handle<HeapObject> object = instr->hydrogen()->object();
+  if (instr->hydrogen()->object_in_new_space()) {
     Register reg = ToRegister(instr->value());
-    Handle<Cell> cell = isolate()->factory()->NewCell(target);
+    Handle<Cell> cell = isolate()->factory()->NewCell(object);
     __ cmp(reg, Operand::ForCell(cell));
   } else {
     Operand operand = ToOperand(instr->value());
-    __ cmp(operand, target);
+    __ cmp(operand, object);
   }
   DeoptimizeIf(not_equal, instr->environment());
 }
 
 
 void LCodeGen::DoDeferredInstanceMigration(LCheckMaps* instr, Register object) {
   {
     PushSafepointRegistersScope scope(this);
     __ push(object);
     __ xor_(esi, esi);
@@ skipping 736 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32