Don't register code for CHA or field guard deopt when precompiling.

runtime/vm/compiler.cc

 // Copyright (c) 2012, 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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 777 matching lines @@
               result->ClearFieldInnvalidationGen();
             }
             if (!parsed_function->HasDeferredPrefixes()) {
               result->ClearPrefixInnvalidationGen();
             }
           } else {
             const bool is_osr = osr_id != Compiler::kNoOSRDeoptId;
             function.InstallOptimizedCode(code, is_osr);
           }
 
-          // TODO(srdjan): In background compilation, verify that CHA has not
-          // been invalidated in the meantime.
-          // Register code with the classes it depends on because of CHA.
-          for (intptr_t i = 0;
-               i < thread->cha()->leaf_classes().length();
-               ++i) {
-            thread->cha()->leaf_classes()[i]->RegisterCHACode(code);
-          }
-
-          for (intptr_t i = 0;
-               i < flow_graph->guarded_fields()->length();
-               i++) {
-            const Field* field = (*flow_graph->guarded_fields())[i];
-            field->RegisterDependentCode(code);
+          // TODO(srdjan): In background compilation, verify that CHA and field
+          // guards have not been invalidated in the meantime.
+          // Register code with the classes it depends on because of CHA and
+          // fields it depends on because of store guards, unless we cannot
+          // deopt.
+          if (Compiler::allow_recompilation()) {
+            for (intptr_t i = 0;
+                 i < thread->cha()->leaf_classes().length();
+                 ++i) {
+              thread->cha()->leaf_classes()[i]->RegisterCHACode(code);
+            }
+            for (intptr_t i = 0;
+                 i < flow_graph->guarded_fields()->length();
+                 i++) {
+              const Field* field = (*flow_graph->guarded_fields())[i];
+              field->RegisterDependentCode(code);
+            }
           }
         } else {  // not optimized.
           if (!Compiler::always_optimize() &&
               (function.ic_data_array() == Array::null())) {
             function.SaveICDataMap(
                 graph_compiler.deopt_id_to_ic_data(),
                 Array::Handle(zone, graph_compiler.edge_counters_array()));
           }
           function.set_unoptimized_code(code);
           function.AttachCode(code);
@@ skipping 1002 matching lines @@
       isolate->set_background_compiler(task);
       start_task = true;
     }
   }
   if (start_task) {
     Dart::thread_pool()->Run(isolate->background_compiler());
   }
 }
 
 }  // namespace dart