Use stability to only conditionally flush information from the CheckMaps table.

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index f9b4d55dfc3f84b55349d429f6106531b7ebf4f1..4c646fea08d40c179959448a3d96fec805691172 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -295,7 +295,8 @@ HValue* CodeStubGraphBuilder<ToNumberStub>::BuildCodeStub() {
   // Check if the parameter is already a SMI or heap number.
   IfBuilder if_number(this);
   if_number.If<HIsSmiAndBranch>(value);
-  if_number.OrIf<HCompareMap>(value, isolate()->factory()->heap_number_map());
+  if_number.OrIf<HCompareMap>(value, isolate()->factory()->heap_number_map(),
+                              top_info());
   if_number.Then();
 
   // Return the number.
@@ -358,7 +359,8 @@ HValue* CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub() {
     HValue* elements = AddLoadElements(boilerplate);
 
     IfBuilder if_fixed_cow(this);
-    if_fixed_cow.If<HCompareMap>(elements, factory->fixed_cow_array_map());
+    if_fixed_cow.If<HCompareMap>(elements, factory->fixed_cow_array_map(),
+                                 top_info());
     if_fixed_cow.Then();
     push_value = BuildCloneShallowArray(boilerplate,
                                         allocation_site,
@@ -369,7 +371,7 @@ HValue* CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub() {
     if_fixed_cow.Else();
 
     IfBuilder if_fixed(this);
-    if_fixed.If<HCompareMap>(elements, factory->fixed_array_map());
+    if_fixed.If<HCompareMap>(elements, factory->fixed_array_map(), top_info());
     if_fixed.Then();
     push_value = BuildCloneShallowArray(boilerplate,
                                         allocation_site,