WIP: type profiling.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index c2911234446f063c1b86b34eb4231187da0cc24e..61fcfe0b4622a7054902dd332cf419954141c424 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -280,6 +280,14 @@ void JSGenericLowering::LowerJSStoreDataPropertyInLiteral(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kDefineDataPropertyInLiteral);
 }
 
+void JSGenericLowering::LowerJSCollectTypeProfile(Node* node) {
+  DataPropertyParameters const& p = DataPropertyParametersOf(node->op());
+  node->InsertInputs(zone(), 2, 2);
+  node->ReplaceInput(2, jsgraph()->HeapConstant(p.feedback().vector()));
+  node->ReplaceInput(3, jsgraph()->SmiConstant(p.feedback().index()));
+  ReplaceWithRuntimeCall(node, Runtime::kStoreTypeInformation);
+}
+
 void JSGenericLowering::LowerJSDeleteProperty(Node* node) {
   LanguageMode language_mode = OpParameter<LanguageMode>(node);
   ReplaceWithRuntimeCall(node, is_strict(language_mode)