Eliminate temporary locals for some expressions

runtime/vm/flow_graph_compiler.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/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/cha.h"
 #include "vm/dart_entry.h"
@@ skipping 720 matching lines @@
 
   // Block all non-free registers.
   for (intptr_t i = 0; i < kFirstFreeCpuRegister; i++) {
     blocked_registers[i] = true;
   }
   for (intptr_t i = kLastFreeCpuRegister + 1; i < kNumberOfCpuRegisters; i++) {
     blocked_registers[i] = true;
   }
 
   // Allocate all unallocated input locations.
-  const bool should_pop = !instr->IsPushArgument();
+  const bool should_pop = !instr->IsPushArgument() && !instr->IsPushTemp();
   for (intptr_t i = locs->input_count() - 1; i >= 0; i--) {
     Location loc = locs->in(i);
     Register reg = kNoRegister;
     if (loc.IsRegister()) {
       reg = loc.reg();
     } else if (loc.IsUnallocated() || loc.IsConstant()) {
       ASSERT(loc.IsConstant() ||
              ((loc.policy() == Location::kRequiresRegister) ||
               (loc.policy() == Location::kWritableRegister) ||
               (loc.policy() == Location::kAny)));
@@ skipping 329 matching lines @@
 
   for (int i = 0; i < len; i++) {
     sorted->Add(CidTarget(ic_data.GetReceiverClassIdAt(i),
                           &Function::ZoneHandle(ic_data.GetTargetAt(i)),
                           ic_data.GetCountAt(i)));
   }
   sorted->Sort(HighestCountFirst);
 }
 
 }  // namespace dart