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

port r22680

original commit message:

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

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/423393003

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22697 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x87/stub-cache-x87.cc

@@ -1299,9 +1299,15 @@ Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
 
   if (check == PROPERTY &&
       (kind() == Code::KEYED_LOAD_IC || kind() == Code::KEYED_STORE_IC)) {
+    // 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;
   Label* smi_target = IncludesNumberType(types) ? &number_case : &miss;