Reland "[turbofan] Checking of input counts on node creation"

src/compiler/graph.h

Index: src/compiler/graph.h
diff --git a/src/compiler/graph.h b/src/compiler/graph.h
index cb073b312acafdc01933bbb6f113be18a714f1c4..28686aa2ca48eb1ac75ba13e2e31c05472edbd87 100644
--- a/src/compiler/graph.h
+++ b/src/compiler/graph.h
@@ -34,6 +34,10 @@ class Graph : public ZoneObject {
   explicit Graph(Zone* zone);
 
   // Base implementation used by all factory methods.
+  Node* NewNodeUnchecked(const Operator* op, int input_count, Node** inputs,
+                         bool incomplete = false);
+
+  // Factory that checks the input count.
   Node* NewNode(const Operator* op, int input_count, Node** inputs,
                 bool incomplete = false);