Isolate/Thread split: Isolate -> Zone for LocationSummary.

runtime/vm/locations.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/locations.h"
 
 #include "vm/assembler.h"
 #include "vm/il_printer.h"
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/stack_frame.h"
 
 namespace dart {
 
 intptr_t RegisterSet::RegisterCount(intptr_t registers) {
   // Brian Kernighan's algorithm for counting the bits set.
   intptr_t count = 0;
   while (registers != 0) {
     ++count;
     registers &= (registers - 1);  // Clear the least significant bit set.
   }
   return count;
 }
 
 
-LocationSummary::LocationSummary(Isolate* isolate,
+LocationSummary::LocationSummary(Zone* zone,
                                  intptr_t input_count,
                                  intptr_t temp_count,
                                  LocationSummary::ContainsCall contains_call)
     : num_inputs_(input_count),
       num_temps_(temp_count),
       stack_bitmap_(NULL),
       contains_call_(contains_call),
       live_registers_() {
 #if defined(DEBUG)
   writable_inputs_ = 0;
 #endif
-  input_locations_ = isolate->current_zone()->Alloc<Location>(num_inputs_);
-  temp_locations_ = isolate->current_zone()->Alloc<Location>(num_temps_);
+  input_locations_ = zone->Alloc<Location>(num_inputs_);
+  temp_locations_ = zone->Alloc<Location>(num_temps_);
 }
 
 
 LocationSummary* LocationSummary::Make(
-    Isolate* isolate,
+    Zone* zone,
     intptr_t input_count,
     Location out,
     LocationSummary::ContainsCall contains_call) {
-  LocationSummary* summary = new(isolate) LocationSummary(
-      isolate, input_count, 0, contains_call);
+  LocationSummary* summary = new(zone) LocationSummary(
+      zone, input_count, 0, contains_call);
   for (intptr_t i = 0; i < input_count; i++) {
     summary->set_in(i, Location::RequiresRegister());
   }
   summary->set_out(0, out);
   return summary;
 }
 
 
 Location Location::Pair(Location first, Location second) {
   PairLocation* pair_location = new PairLocation();
@@ skipping 288 matching lines @@
       // with the right representation because register allocator does not know
       // how they are used within the instruction template.
       ASSERT(in(i).IsMachineRegister());
       ASSERT(live_registers()->Contains(in(i)));
     }
   }
 }
 #endif
 
 }  // namespace dart