VM: Remove PushTempInstr, simplify SSA renaming.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/bootstrap.h"
 #include "vm/compiler.h"
 #include "vm/constant_propagator.h"
@@ skipping 2951 matching lines @@
   return NULL;
 }
 
 
 void CurrentContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   // Only appears in initial definitions, never in normal code.
   UNREACHABLE();
 }
 
 
-LocationSummary* PushTempInstr::MakeLocationSummary(Zone* zone,
-                                                    bool optimizing) const {
-  return LocationSummary::Make(zone,
-                               1,
-                               Location::NoLocation(),
-                               LocationSummary::kNoCall);
-}
-
-
-void PushTempInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  ASSERT(!compiler->is_optimizing());
-  // Nothing to do.
-}
-
-
 LocationSummary* DropTempsInstr::MakeLocationSummary(Zone* zone,
                                                      bool optimizing) const {
   return (InputCount() == 1)
       ? LocationSummary::Make(zone,
                               1,
                               Location::SameAsFirstInput(),
                               LocationSummary::kNoCall)
       : LocationSummary::Make(zone,
                               0,
                               Location::NoLocation(),
@@ skipping 873 matching lines @@
   set_native_c_function(native_function);
   function().SetIsNativeAutoSetupScope(auto_setup_scope);
   Dart_NativeEntryResolver resolver = library.native_entry_resolver();
   bool is_bootstrap_native = Bootstrap::IsBootstapResolver(resolver);
   set_is_bootstrap_native(is_bootstrap_native);
 }
 
 #undef __
 
 }  // namespace dart