Revert "Move precompilation-related flags to flags list."

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"
 #include "vm/intermediate_language.h"
 #include "vm/stack_frame.h"
 
 namespace dart {
 
 
 DEFINE_FLAG(bool, dead_store_elimination, true, "Eliminate dead stores");
 DEFINE_FLAG(bool, load_cse, true, "Use redundant load elimination.");
 DEFINE_FLAG(bool, trace_load_optimization, false,
     "Print live sets for load optimization pass.");
 
+DECLARE_FLAG(bool, fields_may_be_reset);
+DECLARE_FLAG(bool, precompilation);
+
 // Quick access to the current zone.
 #define Z (zone())
 
 
 class CSEInstructionMap : public ValueObject {
  public:
   // Right now CSE and LICM track a single effect: possible externalization of
   // strings.
   // Other effects like modifications of fields are tracked in a separate load
   // forwarding pass via Alias structure.
@@ skipping 1388 matching lines @@
 
   // Replace value we are checking with phi's input.
   check->value()->BindTo(phi->InputAt(non_smi_input)->definition());
 
   phi->UpdateType(CompileType::FromCid(kSmiCid));
 }
 
 
 void LICM::OptimisticallySpecializeSmiPhis() {
   if (!flow_graph()->function().allows_hoisting_check_class() ||
-      FLAG_precompiled_mode) {
+      FLAG_precompilation) {
     // Do not hoist any: Either deoptimized on a hoisted check,
     // or compiling precompiled code where we can't do optimistic
     // hoisting of checks.
     return;
   }
 
   const ZoneGrowableArray<BlockEntryInstr*>& loop_headers =
       flow_graph()->LoopHeaders();
 
   for (intptr_t i = 0; i < loop_headers.length(); ++i) {
@@ skipping 2017 matching lines @@
         join->phis_ = NULL;
       } else {
         join->phis_->TruncateTo(to_index);
       }
     }
   }
 }
 
 
 }  // namespace dart