[turbofan] Skip JSCallReducer and JSNativeContextSpecialization on asm.js.

src/compiler/js-call-reducer.cc

Index: src/compiler/js-call-reducer.cc
diff --git a/src/compiler/js-call-reducer.cc b/src/compiler/js-call-reducer.cc
index a11643582e0a09d8af26801af01dca88d3a3dd89..21148b3d20d6351d82cbbc3913745762129b52b1 100644
--- a/src/compiler/js-call-reducer.cc
+++ b/src/compiler/js-call-reducer.cc
@@ -617,9 +617,6 @@ Reduction JSCallReducer::ReduceJSCall(Node* node) {
     return Changed(node);
   }
 
-  // Not much we can do if deoptimization support is disabled.
-  if (!(flags() & kDeoptimizationEnabled)) return NoChange();
-
   Handle<Object> feedback(nexus.GetFeedback(), isolate());
   if (feedback->IsAllocationSite()) {
     // Retrieve the Array function from the {node}.
@@ -727,9 +724,6 @@ Reduction JSCallReducer::ReduceJSConstruct(Node* node) {
     return NoChange();
   }
 
-  // Not much we can do if deoptimization support is disabled.
-  if (!(flags() & kDeoptimizationEnabled)) return NoChange();
-
   if (!p.feedback().IsValid()) return NoChange();
   CallICNexus nexus(p.feedback().vector(), p.feedback().slot());
   Handle<Object> feedback(nexus.GetFeedback(), isolate());