[turbofan] Add initial support for global specialization.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 3d153c1c0c82a063a05699866172423c1c6ad701..7ddc5afd4364bb4e1dff99c18458643bd274a6c5 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -30,6 +30,7 @@
 #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-global-specialization.h"
 #include "src/compiler/js-inlining.h"
 #include "src/compiler/js-intrinsic-lowering.h"
 #include "src/compiler/js-type-feedback.h"
@@ -511,6 +512,20 @@ struct InliningPhase {
             : MaybeHandle<Context>());
     JSFrameSpecialization frame_specialization(data->info()->osr_frame(),
                                                data->jsgraph());
+    JSGlobalSpecialization::Flags global_flags =
+        JSGlobalSpecialization::kNoFlags;
+    if (data->info()->is_deoptimization_enabled()) {
+      global_flags |= JSGlobalSpecialization::kDeoptimizationEnabled;
+    }
+    if (data->info()->is_typing_enabled()) {
+      global_flags |= JSGlobalSpecialization::kTypingEnabled;
+    }
+    JSGlobalSpecialization global_specialization(
+        &graph_reducer, data->jsgraph(), global_flags,
+        data->info()->has_global_object()
+            ? handle(data->info()->global_object())
+            : Handle<GlobalObject>(),
+        data->info()->dependencies());
     JSInliner inliner(&graph_reducer, data->info()->is_inlining_enabled()
                                           ? JSInliner::kGeneralInlining
                                           : JSInliner::kRestrictedInlining,
@@ -520,6 +535,9 @@ struct InliningPhase {
     if (data->info()->is_frame_specializing()) {
       AddReducer(data, &graph_reducer, &frame_specialization);
     }
+    if (data->info()->is_native_context_specializing()) {
+      AddReducer(data, &graph_reducer, &global_specialization);
+    }
     AddReducer(data, &graph_reducer, &context_specialization);
     AddReducer(data, &graph_reducer, &inliner);
     graph_reducer.ReduceGraph();