[turbofan] Only replace nodes eagerly during simplified lowering if the types stay the same.

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 074752b39954738df7e777387e089d5268f55ce2..cccc76b4358027d2cc6811d7c4859e6ed93f4274 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1032,14 +1032,16 @@ class RepresentationSelector {
              node->op()->mnemonic(), replacement->id(),
              replacement->op()->mnemonic()));
     }
-    if (replacement->id() < count_) {
-      // Replace with a previously existing node eagerly.
+    if (replacement->id() < count_ &&
+        GetInfo(replacement)->output == GetInfo(node)->output) {
+      // Replace with a previously existing node eagerly only if the type is the
+      // same.
       node->ReplaceUses(replacement);
     } else {
       // Otherwise, we are replacing a node with a representation change.
       // Such a substitution must be done after all lowering is done, because
-      // new nodes do not have {NodeInfo} entries, and that would confuse
-      // the representation change insertion for uses of it.
+      // changing the type could confuse the representation change
+      // insertion for uses of the node.
       replacements_.push_back(node);
       replacements_.push_back(replacement);
     }