WIP: type profiling.

src/compiler/js-operator.cc

Index: src/compiler/js-operator.cc
diff --git a/src/compiler/js-operator.cc b/src/compiler/js-operator.cc
index b3d118130e533a39df5b0620fcd13d01cf3fb152..243afb2d775ddd2adf98dfb59db16383fe0de601 100644
--- a/src/compiler/js-operator.cc
+++ b/src/compiler/js-operator.cc
@@ -293,7 +293,8 @@ std::ostream& operator<<(std::ostream& os, DataPropertyParameters const& p) {
 }
 
 DataPropertyParameters const& DataPropertyParametersOf(const Operator* op) {
-  DCHECK(op->opcode() == IrOpcode::kJSStoreDataPropertyInLiteral);
+  DCHECK(op->opcode() == IrOpcode::kJSStoreDataPropertyInLiteral ||
+         op->opcode() == IrOpcode::kJSCollectTypeProfile);
   return OpParameter<DataPropertyParameters>(op);
 }
 
@@ -708,6 +709,17 @@ const Operator* JSOperatorBuilder::StoreDataPropertyInLiteral(
       parameters);                     // parameter
 }
 
+const Operator* JSOperatorBuilder::CollectTypeProfile(
+    const VectorSlotPair& feedback) {
+  DataPropertyParameters parameters(feedback);
+  return new (zone()) Operator1<DataPropertyParameters>(  // --
+      IrOpcode::kJSCollectTypeProfile,
+      Operator::kNoThrow,      // opcode
+      "JSCollectTypeProfile",  // name
+      2, 1, 1, 0, 1, 0,        // counts
+      parameters);             // parameter
+}
+
 const Operator* JSOperatorBuilder::ToBoolean(ToBooleanHints hints) {
   // TODO(turbofan): Cache most important versions of this operator.
   return new (zone()) Operator1<ToBooleanHints>(  //--