Revert "[turbofan] Add new JSFrameSpecialization reducer."

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 66f3bf0fc4a1584d326bd5b4ea8d8ba34bee58f6..7ced8e67b261d83606059dbc4192dbdb6d4ada4a 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -26,7 +26,6 @@
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/js-builtin-reducer.h"
 #include "src/compiler/js-context-specialization.h"
-#include "src/compiler/js-frame-specialization.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-inlining.h"
 #include "src/compiler/js-intrinsic-lowering.h"
@@ -497,17 +496,12 @@ struct InliningPhase {
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
                                          data->common(), data->machine());
     JSContextSpecializer context_specializer(&graph_reducer, data->jsgraph());
-    JSFrameSpecialization frame_specialization(data->info()->osr_frame(),
-                                               data->jsgraph());
     JSInliner inliner(&graph_reducer, data->info()->is_inlining_enabled()
                                           ? JSInliner::kGeneralInlining
                                           : JSInliner::kRestrictedInlining,
                       temp_zone, data->info(), data->jsgraph());
     AddReducer(data, &graph_reducer, &dead_code_elimination);
     AddReducer(data, &graph_reducer, &common_reducer);
-    if (data->info()->is_frame_specializing()) {
-      AddReducer(data, &graph_reducer, &frame_specialization);
-    }
     if (data->info()->is_context_specializing()) {
       AddReducer(data, &graph_reducer, &context_specializer);
     }
@@ -1041,12 +1035,6 @@ Handle<Code> Pipeline::GenerateCode() {
   if (data.compilation_failed()) return Handle<Code>::null();
   RunPrintAndVerify("Initial untyped", true);
 
-  // Perform OSR deconstruction.
-  if (info()->is_osr()) {
-    Run<OsrDeconstructionPhase>();
-    RunPrintAndVerify("OSR deconstruction", true);
-  }
-
   // Perform context specialization and inlining (if enabled).
   Run<InliningPhase>();
   RunPrintAndVerify("Inlined", true);
@@ -1083,6 +1071,11 @@ Handle<Code> Pipeline::GenerateCode() {
       RunPrintAndVerify("Loop peeled");
     }
 
+    if (info()->is_osr()) {
+      Run<OsrDeconstructionPhase>();
+      RunPrintAndVerify("OSR deconstruction");
+    }
+
     if (info()->is_type_feedback_enabled()) {
       Run<JSTypeFeedbackPhase>();
       RunPrintAndVerify("JSType feedback");
@@ -1102,6 +1095,12 @@ Handle<Code> Pipeline::GenerateCode() {
     Run<ChangeLoweringPhase>();
     // TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
     RunPrintAndVerify("Lowered changes", true);
+  } else {
+    if (info()->is_osr()) {
+      Run<OsrDeconstructionPhase>();
+      if (info()->bailout_reason() != kNoReason) return Handle<Code>::null();
+      RunPrintAndVerify("OSR deconstruction", true);
+    }
   }
 
   // Lower any remaining generic JSOperators.