Implement set trap for proxies, and revamp class hierarchy in preparation

src/ia32/ic-ia32.cc

Index: src/ia32/ic-ia32.cc
diff --git a/src/ia32/ic-ia32.cc b/src/ia32/ic-ia32.cc
index 090ea401a4a26524afcc4aeceac5099899a4c217..7c5ca967a728309ff7f80d1984efbb4a1aef5cea 100644
--- a/src/ia32/ic-ia32.cc
+++ b/src/ia32/ic-ia32.cc
@@ -78,11 +78,11 @@ static void GenerateStringDictionaryReceiverCheck(MacroAssembler* masm,
   // Check that the receiver is a valid JS object.
   __ mov(r1, FieldOperand(receiver, HeapObject::kMapOffset));
   __ movzx_b(r0, FieldOperand(r1, Map::kInstanceTypeOffset));
-  __ cmp(r0, FIRST_JS_OBJECT_TYPE);
+  __ cmp(r0, FIRST_OBJECT_OR_FUNCTION_CLASS_TYPE);
   __ j(below, miss);
 
   // If this assert fails, we have to check upper bound too.
-  ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
+  ASSERT(LAST_TYPE == LAST_OBJECT_OR_FUNCTION_CLASS_TYPE);
 
   GenerateGlobalInstanceTypeCheck(masm, r0, miss);
 
@@ -728,8 +728,12 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ CmpInstanceType(edi, JS_ARRAY_TYPE);
   __ j(equal, &array);
   // Check that the object is some kind of JS object.
-  __ CmpInstanceType(edi, FIRST_JS_OBJECT_TYPE);
+  __ CmpInstanceType(edi, FIRST_JS_RECEIVER_TYPE);
   __ j(below, &slow);
+  __ CmpInstanceType(edi, JS_PROXY_TYPE);
+  __ j(equal, &slow);
+  __ CmpInstanceType(edi, JS_FUNCTION_PROXY_TYPE);
+  __ j(equal, &slow);
 
   // Object case: Check key against length in the elements array.
   // eax: value