Only generate a single normal IC per kind per slow-mode map.

src/arm/stub-cache-arm.cc

Index: src/arm/stub-cache-arm.cc
diff --git a/src/arm/stub-cache-arm.cc b/src/arm/stub-cache-arm.cc
index b2b1a928097210184c438683c44ee6d1448cbdd2..391d85a519abd3731b2fe8df166d8a3551ffbbc1 100644
--- a/src/arm/stub-cache-arm.cc
+++ b/src/arm/stub-cache-arm.cc
@@ -1273,8 +1273,14 @@ Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
 
   if (check == PROPERTY &&
       (kind() == Code::KEYED_LOAD_IC || kind() == Code::KEYED_STORE_IC)) {
-    __ cmp(this->name(), Operand(name));
-    __ b(ne, &miss);
+    // In case we are compiling an IC for dictionary loads and stores, just
+    // check whether the name is unique.
+    if (name.is_identical_to(isolate()->factory()->normal_ic_symbol())) {
+      __ JumpIfNotUniqueName(this->name(), &miss);
+    } else {
+      __ cmp(this->name(), Operand(name));
+      __ b(ne, &miss);
+    }
   }
 
   Label number_case;