Remove more feature in product mode

runtime/vm/redundancy_elimination.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/redundancy_elimination.h"
 
 #include "vm/bit_vector.h"
 #include "vm/flow_graph.h"
 #include "vm/hash_map.h"
 #include "vm/il_printer.h"
@@ skipping 2076 matching lines @@
       // as replaced and store a pointer to the replacement.
       Definition* replacement = (*pred_out_values)[place_id]->Replacement();
       Value* input = new(Z) Value(replacement);
       phi->SetInputAt(i, input);
       replacement->AddInputUse(input);
     }
 
     graph_->AllocateSSAIndexes(phi);
     phis_.Add(phi);  // Postpone phi insertion until after load forwarding.
 
-    if (FLAG_trace_load_optimization) {
+    if (FLAG_support_il_printer && FLAG_trace_load_optimization) {
       THR_Print("created pending phi %s for %s at B%" Pd "\n",
                 phi->ToCString(),
                 aliased_set_->places()[place_id]->ToCString(),
                 block->block_id());
     }
   }
 
   // Iterate over basic blocks and replace exposed loads with incoming
   // values.
   void ForwardLoads() {
@@ skipping 207 matching lines @@
       // a dominates b or b dominates a.
       if (!a->IsPhi()) {
         if (Dominates(a, b)) {
           Definition* t = a;
           a = b;
           b = t;
         }
         ASSERT(Dominates(b, a));
       }
 
-      if (FLAG_trace_load_optimization) {
+      if (FLAG_support_il_printer && FLAG_trace_load_optimization) {
         THR_Print("Replacing %s with congruent %s\n",
                   a->ToCString(),
                   b->ToCString());
       }
 
       a->ReplaceUsesWith(b);
       if (a->IsPhi()) {
         // We might be replacing a phi introduced by the load forwarding
         // that is not inserted in the graph yet.
         ASSERT(b->IsPhi());
@@ skipping 413 matching lines @@
 // Right now we are attempting to sink allocation only into
 // deoptimization exit. So candidate should only be used in StoreInstanceField
 // instructions that write into fields of the allocated object.
 // We do not support materialization of the object that has type arguments.
 static bool IsAllocationSinkingCandidate(Definition* alloc,
                                          SafeUseCheck check_type) {
   for (Value* use = alloc->input_use_list();
        use != NULL;
        use = use->next_use()) {
     if (!IsSafeUse(use, check_type)) {
-      if (FLAG_trace_optimization) {
+      if (FLAG_support_il_printer && FLAG_trace_optimization) {
         THR_Print("use of %s at %s is unsafe for allocation sinking\n",
                   alloc->ToCString(),
                   use->instruction()->ToCString());
       }
       return false;
     }
   }
 
   return true;
 }
@@ skipping 692 matching lines @@
         join->phis_ = NULL;
       } else {
         join->phis_->TruncateTo(to_index);
       }
     }
   }
 }
 
 
 }  // namespace dart