X87: Only generate a single normal IC per kind per slow-mode map.

src/x87/stub-cache-x87.cc

Index: src/x87/stub-cache-x87.cc
diff --git a/src/x87/stub-cache-x87.cc b/src/x87/stub-cache-x87.cc
index 6a4e5be653fe661b1a0b0f3ab1de94f6e34e7c8f..f351d62ebe4fc375d90e4aa03a4346056059e331 100644
--- a/src/x87/stub-cache-x87.cc
+++ b/src/x87/stub-cache-x87.cc
@@ -1299,8 +1299,14 @@ Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
 
   if (check == PROPERTY &&
       (kind() == Code::KEYED_LOAD_IC || kind() == Code::KEYED_STORE_IC)) {
-    __ cmp(this->name(), Immediate(name));
-    __ j(not_equal, &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(), Immediate(name));
+      __ j(not_equal, &miss);
+    }
   }
 
   Label number_case;