diff --git a/src/ic/x87/handler-compiler-x87.cc b/src/ic/x87/handler-compiler-x87.cc
index 00eb077e43b..2eb10c3a3bc 100644
--- a/src/ic/x87/handler-compiler-x87.cc
+++ b/src/ic/x87/handler-compiler-x87.cc
@@ -17,9 +17,8 @@ namespace internal {
 
 
 void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
-    MacroAssembler* masm, Handle<HeapType> type, Register receiver,
-    Register holder, int accessor_index, int expected_arguments,
-    Register scratch) {
+    MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
+    int accessor_index, int expected_arguments, Register scratch) {
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
@@ -27,7 +26,7 @@ void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
       DCHECK(!holder.is(scratch));
       DCHECK(!receiver.is(scratch));
       // Call the JavaScript getter with the receiver on the stack.
-      if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) {
+      if (map->IsJSGlobalObjectMap()) {
         // Swap in the global receiver.
         __ mov(scratch,
                FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
@@ -237,9 +236,8 @@ void PropertyHandlerCompiler::GenerateCheckPropertyCell(
 
 
 void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
-    MacroAssembler* masm, Handle<HeapType> type, Register receiver,
-    Register holder, int accessor_index, int expected_arguments,
-    Register scratch) {
+    MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
+    int accessor_index, int expected_arguments, Register scratch) {
   // ----------- S t a t e -------------
   //  -- esp[0] : return address
   // -----------------------------------
@@ -254,8 +252,7 @@ void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
       DCHECK(!receiver.is(scratch));
       DCHECK(!value().is(scratch));
       // Call the JavaScript setter with receiver and value on the stack.
-      if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) {
-        // Swap in the global receiver.
+      if (map->IsJSGlobalObjectMap()) {
         __ mov(scratch,
                FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
         receiver = scratch;
@@ -419,7 +416,7 @@ Register PropertyHandlerCompiler::CheckPrototypes(
     Register object_reg, Register holder_reg, Register scratch1,
     Register scratch2, Handle<Name> name, Label* miss,
     PrototypeCheckType check) {
-  Handle<Map> receiver_map(IC::TypeToMap(*type(), isolate()));
+  Handle<Map> receiver_map = map();
 
   // Make sure there's no overlap between holder and object registers.
   DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg));
@@ -431,8 +428,9 @@ Register PropertyHandlerCompiler::CheckPrototypes(
   int depth = 0;
 
   Handle<JSObject> current = Handle<JSObject>::null();
-  if (type()->IsConstant())
-    current = Handle<JSObject>::cast(type()->AsConstant()->Value());
+  if (receiver_map->IsJSGlobalObjectMap()) {
+    current = isolate()->global_object();
+  }
   Handle<JSObject> prototype = Handle<JSObject>::null();
   Handle<Map> current_map = receiver_map;
   Handle<Map> holder_map(holder()->map());
diff --git a/src/ic/x87/ic-compiler-x87.cc b/src/ic/x87/ic-compiler-x87.cc
index 544514f8267..160e9e9c673 100644
--- a/src/ic/x87/ic-compiler-x87.cc
+++ b/src/ic/x87/ic-compiler-x87.cc
@@ -36,7 +36,7 @@ void PropertyICCompiler::GenerateRuntimeSetProperty(
 #undef __
 #define __ ACCESS_MASM(masm())
 
-Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
+Handle<Code> PropertyICCompiler::CompilePolymorphic(MapHandleList* maps,
                                                     CodeHandleList* handlers,
                                                     Handle<Name> name,
                                                     Code::StubType type,
@@ -63,7 +63,7 @@ Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
   }
 
   Label number_case;
-  Label* smi_target = IncludesNumberType(types) ? &number_case : &miss;
+  Label* smi_target = IncludesNumberMap(maps) ? &number_case : &miss;
   __ JumpIfSmi(receiver(), smi_target);
 
   // Polymorphic keyed stores may use the map register
@@ -71,16 +71,15 @@ Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
   DCHECK(kind() != Code::KEYED_STORE_IC ||
          map_reg.is(ElementTransitionAndStoreDescriptor::MapRegister()));
   __ mov(map_reg, FieldOperand(receiver(), HeapObject::kMapOffset));
-  int receiver_count = types->length();
+  int receiver_count = maps->length();
   int number_of_handled_maps = 0;
   for (int current = 0; current < receiver_count; ++current) {
-    Handle<HeapType> type = types->at(current);
-    Handle<Map> map = IC::TypeToMap(*type, isolate());
+    Handle<Map> map = maps->at(current);
     if (!map->is_deprecated()) {
       number_of_handled_maps++;
       Handle<WeakCell> cell = Map::WeakCellForMap(map);
       __ CmpWeakValue(map_reg, cell, scratch2());
-      if (type->Is(HeapType::Number())) {
+      if (map->instance_type() == HEAP_NUMBER_TYPE) {
         DCHECK(!number_case.is_unused());
         __ bind(&number_case);
       }