Revert of [turbofan] Osr value typing + dynamic type checks on entry.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 049910dee9691593bc5d2261ef211997f5d6a30f..0041da25bf31e00b18b135849e1ddf97c1f2390d 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -859,20 +859,7 @@
   }
 };
 
-struct OsrTyperPhase {
-  static const char* phase_name() { return "osr typer"; }
-
-  void Run(PipelineData* data, Zone* temp_zone) {
-    NodeVector roots(temp_zone);
-    data->jsgraph()->GetCachedNodes(&roots);
-    // Dummy induction variable optimizer: at the moment, we do not try
-    // to compute loop variable bounds on OSR.
-    LoopVariableOptimizer induction_vars(data->jsgraph()->graph(),
-                                         data->common(), temp_zone);
-    Typer typer(data->isolate(), data->graph());
-    typer.Run(roots, &induction_vars);
-  }
-};
+#ifdef DEBUG
 
 struct UntyperPhase {
   static const char* phase_name() { return "untyper"; }
@@ -889,12 +876,6 @@
       }
     };
 
-    NodeVector roots(temp_zone);
-    data->jsgraph()->GetCachedNodes(&roots);
-    for (Node* node : roots) {
-      NodeProperties::RemoveType(node);
-    }
-
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     RemoveTypeReducer remove_type_reducer;
     AddReducer(data, &graph_reducer, &remove_type_reducer);
@@ -902,15 +883,12 @@
   }
 };
 
+#endif  // DEBUG
+
 struct OsrDeconstructionPhase {
   static const char* phase_name() { return "OSR deconstruction"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    GraphTrimmer trimmer(temp_zone, data->graph());
-    NodeVector roots(temp_zone);
-    data->jsgraph()->GetCachedNodes(&roots);
-    trimmer.TrimGraph(roots.begin(), roots.end());
-
     OsrHelper osr_helper(data->info());
     osr_helper.Deconstruct(data->jsgraph(), data->common(), temp_zone);
   }
@@ -1515,11 +1493,7 @@
 
   // Perform OSR deconstruction.
   if (info()->is_osr()) {
-    Run<OsrTyperPhase>();
-
     Run<OsrDeconstructionPhase>();
-
-    Run<UntyperPhase>();
     RunPrintAndVerify("OSR deconstruction", true);
   }