VM: Remove PushTempInstr, simplify SSA renaming.

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 385 matching lines @@
   SetValue(instr, non_constant_);
 }
 
 
 void ConstantPropagator::VisitLoadLocal(LoadLocalInstr* instr) {
   // Instruction is eliminated when translating to SSA.
   UNREACHABLE();
 }
 
 
-void ConstantPropagator::VisitPushTemp(PushTempInstr* instr) {
-  // Instruction is eliminated when translating to SSA.
-  UNREACHABLE();
-}
-
-
 void ConstantPropagator::VisitDropTemps(DropTempsInstr* instr) {
   // Instruction is eliminated when translating to SSA.
   UNREACHABLE();
 }
 
 
 void ConstantPropagator::VisitStoreLocal(StoreLocalInstr* instr) {
   // Instruction is eliminated when translating to SSA.
   UNREACHABLE();
 }
@@ skipping 1264 matching lines @@
   graph_->MergeBlocks();
   GrowableArray<BitVector*> dominance_frontier;
   graph_->ComputeDominators(&dominance_frontier);
 
   if (FLAG_trace_constant_propagation) {
     FlowGraphPrinter::PrintGraph("After CP", graph_);
   }
 }
 
 }  // namespace dart