Revert of [turbofan] Insert dummy values when changing from None type.

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index c3f50b39af5b88379be703596858be01b034951f..de64de3e1fd7cf0c15b72f21a6fa2a6baad36a27 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -311,9 +311,6 @@
       bool updated = UpdateFeedbackType(node);
       TRACE(" visit #%d: %s\n", node->id(), node->op()->mnemonic());
       VisitNode(node, info->truncation(), nullptr);
-      TRACE("  ==> output ");
-      PrintOutputInfo(info);
-      TRACE("\n");
       if (updated) {
         for (Node* const user : node->uses()) {
           if (GetInfo(user)->visited()) {
@@ -333,9 +330,6 @@
       bool updated = UpdateFeedbackType(node);
       TRACE(" visit #%d: %s\n", node->id(), node->op()->mnemonic());
       VisitNode(node, info->truncation(), nullptr);
-      TRACE("  ==> output ");
-      PrintOutputInfo(info);
-      TRACE("\n");
       if (updated) {
         for (Node* const user : node->uses()) {
           if (GetInfo(user)->visited()) {
@@ -540,6 +534,9 @@
       TRACE(" visit #%d: %s (trunc: %s)\n", node->id(), node->op()->mnemonic(),
             info->truncation().description());
       VisitNode(node, info->truncation(), nullptr);
+      TRACE("  ==> output ");
+      PrintOutputInfo(info);
+      TRACE("\n");
     }
   }
 
@@ -989,11 +986,8 @@
       for (int i = 0; i < node->InputCount(); i++) {
         Node* input = node->InputAt(i);
         NodeInfo* input_info = GetInfo(input);
-        Type* input_type = TypeOf(input);
-        MachineRepresentation rep = input_type->IsInhabited()
-                                        ? input_info->representation()
-                                        : MachineRepresentation::kNone;
-        MachineType machine_type(rep, DeoptValueSemanticOf(input_type));
+        MachineType machine_type(input_info->representation(),
+                                 DeoptValueSemanticOf(TypeOf(input)));
         DCHECK(machine_type.representation() !=
                    MachineRepresentation::kWord32 ||
                machine_type.semantic() == MachineSemantic::kInt32 ||