[turbofan] Improve UpdateType debug output.

R=jarin@chromium.org

Bug: chromium:906567
Change-Id: Ic99c7a240ecb37c7b032b388f604d3f256d335b3
Reviewed-on: https://chromium-review.googlesource.com/c/1392196Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58497}

src/compiler/typer.cc

@@ -371,10 +371,10 @@ class Typer::Visitor : public Reducer {
       if (V8_UNLIKELY(node->opcode() == IrOpcode::kNumberAdd)) {
         for (int i = 0; i < 2; ++i) {
           Node* input = NodeProperties::GetValueInput(node, i);
-          if (NodeProperties::IsTyped(input)) {
-            remembered_types_[{node, i}] = NodeProperties::GetType(input);
-          }
+          CHECK(NodeProperties::IsTyped(input));
+          remembered_types_[{node, i}] = NodeProperties::GetType(input);
         }
+        remembered_types_[{node, 2}] = current;
       }
 
       NodeProperties::SetType(node, current);