Use same range info when emitting code and computing if instruction can deopt.

runtime/vm/constant_propagator.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/constant_propagator.h"
 
 #include "vm/bit_vector.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/flow_graph_range_analysis.h"
@@ skipping 1101 matching lines @@
 }
 
 
 void ConstantPropagator::VisitInvokeMathCFunction(
     InvokeMathCFunctionInstr* instr) {
   // TODO(kmillikin): Handle conversion.
   SetValue(instr, non_constant_);
 }
 
 
-void ConstantPropagator::VisitMergedMath(MergedMathInstr* instr) {
+void ConstantPropagator::VisitTruncDivMod(TruncDivModInstr* instr) {
   // TODO(srdjan): Handle merged instruction.
   SetValue(instr, non_constant_);
 }
 
 
 void ConstantPropagator::VisitExtractNthOutput(ExtractNthOutputInstr* instr) {
   SetValue(instr, non_constant_);
 }
 
 
@@ skipping 598 matching lines @@
   GrowableArray<BitVector*> dominance_frontier;
   graph_->ComputeDominators(&dominance_frontier);
 
   if (FLAG_trace_constant_propagation &&
       FlowGraphPrinter::ShouldPrint(graph_->function())) {
     FlowGraphPrinter::PrintGraph("After CP", graph_);
   }
 }
 
 }  // namespace dart