Change the SSA construction pass to also construct def-use chains.

runtime/vm/flow_graph_inliner.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/flow_graph_inliner.h"
 
 #include "vm/compiler.h"
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 473 matching lines @@
       ASSERT(arguments->length() == function.NumParameters());
       ASSERT(param_stubs.length() == callee_graph->parameter_count());
 
       {
         TimerScope timer(FLAG_compiler_stats,
                          &CompilerStats::graphinliner_ssa_timer,
                          isolate);
         // Compute SSA on the callee graph, catching bailouts.
         callee_graph->ComputeSSA(caller_graph_->max_virtual_register_number(),
                                  &param_stubs);
-        callee_graph->ComputeUseLists();
+        DEBUG_ASSERT(callee_graph->VerifyUseLists());
       }
 
       {
         TimerScope timer(FLAG_compiler_stats,
                          &CompilerStats::graphinliner_opt_timer,
                          isolate);
         // TODO(zerny): Do more optimization passes on the callee graph.
         FlowGraphOptimizer optimizer(callee_graph);
         optimizer.ApplyICData();
         DEBUG_ASSERT(callee_graph->VerifyUseLists());
@@ skipping 364 matching lines @@
         OS::Print("After Inlining of %s\n", flow_graph_->
                   parsed_function().function().ToFullyQualifiedCString());
         FlowGraphPrinter printer(*flow_graph_);
         printer.PrintBlocks();
       }
     }
   }
 }
 
 }  // namespace dart