Remove more feature in product mode

runtime/vm/flow_graph_allocator.cc

 // Copyright (c) 2013, 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/flow_graph_allocator.h"
 
 #include "vm/bit_vector.h"
 #include "vm/intermediate_language.h"
 #include "vm/il_printer.h"
 #include "vm/flow_graph.h"
@@ skipping 2951 matching lines @@
 
   if (FLAG_print_ssa_liveranges) {
     const Function& function = flow_graph_.function();
     THR_Print("-- [before ssa allocator] ranges [%s] ---------\n",
               function.ToFullyQualifiedCString());
     PrintLiveRanges();
     THR_Print("----------------------------------------------\n");
 
     THR_Print("-- [before ssa allocator] ir [%s] -------------\n",
               function.ToFullyQualifiedCString());
-    FlowGraphPrinter printer(flow_graph_, true);
-    printer.PrintBlocks();
+    if (FLAG_support_il_printer) {
+#ifndef PRODUCT
+      FlowGraphPrinter printer(flow_graph_, true);
+      printer.PrintBlocks();
+#endif
+    }
     THR_Print("----------------------------------------------\n");
   }
 
   PrepareForAllocation(Location::kRegister,
                        kNumberOfCpuRegisters,
                        unallocated_cpu_,
                        cpu_regs_,
                        blocked_cpu_registers_);
   AllocateUnallocatedRanges();
 
@@ skipping 19 matching lines @@
   if (FLAG_print_ssa_liveranges) {
     const Function& function = flow_graph_.function();
 
     THR_Print("-- [after ssa allocator] ranges [%s] ---------\n",
               function.ToFullyQualifiedCString());
     PrintLiveRanges();
     THR_Print("----------------------------------------------\n");
 
     THR_Print("-- [after ssa allocator] ir [%s] -------------\n",
               function.ToFullyQualifiedCString());
-    FlowGraphPrinter printer(flow_graph_, true);
-    printer.PrintBlocks();
+    if (FLAG_support_il_printer) {
+#ifndef PRODUCT
+      FlowGraphPrinter printer(flow_graph_, true);
+      printer.PrintBlocks();
+#endif
+    }
     THR_Print("----------------------------------------------\n");
   }
 }
 
 
 }  // namespace dart