Revert "Remove classes Computation and BindInstr."

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2012, 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/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 592 matching lines @@
 }
 
 
 void FlowGraphCompiler::EmitInstructionPrologue(Instruction* instr) {
   if (!is_optimizing()) {
     AllocateRegistersLocally(instr);
   }
 }
 
 
-void FlowGraphCompiler::EmitInstructionEpilogue(Instruction* instr) {
-  if (is_optimizing()) return;
-  Definition* defn = instr->AsDefinition();
-  if ((defn != NULL) && defn->is_used()) {
-    __ pushq(defn->locs()->out().reg());
-  }
-}
-
-
 void FlowGraphCompiler::CopyParameters() {
   __ Comment("Copy parameters");
   const Function& function = parsed_function().function();
   const bool is_native_instance_closure =
       function.is_native() && function.IsImplicitInstanceClosureFunction();
   LocalScope* scope = parsed_function().node_sequence()->scope();
   const int num_fixed_params = function.num_fixed_parameters();
   const int num_opt_params = function.num_optional_parameters();
   int implicit_this_param_pos = is_native_instance_closure ? -1 : 0;
   ASSERT(parsed_function().first_parameter_index() ==
@@ skipping 680 matching lines @@
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   __ Exchange(mem1, mem2);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64