Add higher-level accesses to Environment. Print flow graph after register allocation. Most interest…

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
===================================================================
--- runtime/vm/flow_graph_compiler_x64.cc	(revision 9819)
+++ runtime/vm/flow_graph_compiler_x64.cc	(working copy)
@@ -42,10 +42,8 @@
             Address(RBP, ParsedFunction::kFirstLocalSlotIndex * kWordSize));
 
     const GrowableArray<Value*>& values = deoptimization_env_->values();
-    const GrowableArray<Location>* locations = deoptimization_env_->locations();
-
     for (intptr_t i = 0; i < values.length(); i++) {
-      const Location loc = (*locations)[i];
+      const Location loc = deoptimization_env_->LocationAt(i);
       if (loc.IsInvalid()) {
         ASSERT(values[i]->IsConstant());
         __ PushObject(values[i]->AsConstant()->value());