Add --deoptimization_counter_inlining_threshold=10 that stops inlining in a method that has reached…

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"
 #include "vm/flow_graph_compiler.h"
 #include "vm/flow_graph_optimizer.h"
 #include "vm/il_printer.h"
 #include "vm/intrinsifier.h"
 #include "vm/longjump.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/timer.h"
 
 namespace dart {
 
+DEFINE_FLAG(int, deoptimization_counter_inlining_threshold, 12,
+    "How many times we allow deoptimization before we stop inlining.");
 DEFINE_FLAG(bool, trace_inlining, false, "Trace inlining");
 DEFINE_FLAG(charp, inlining_filter, NULL, "Inline only in named function");
 
 // Flags for inlining heuristics.
 DEFINE_FLAG(int, inlining_depth_threshold, 3,
     "Inline function calls up to threshold nesting depth");
 DEFINE_FLAG(int, inlining_size_threshold, 22,
     "Always inline functions that have threshold or fewer instructions");
 DEFINE_FLAG(int, inlining_callee_call_sites_threshold, 1,
     "Always inline functions containing threshold or fewer calls.");
@@ skipping 348 matching lines @@
       return true;
     }
     return false;
   }
 
   // TODO(srdjan): Handle large 'skip_static_call_deopt_ids'. Currently
   // max. size observed is 11 (dart2js).
   void InlineCalls() {
     // If inlining depth is less then one abort.
     if (FLAG_inlining_depth_threshold < 1) return;
+    if (caller_graph_->parsed_function().function().deoptimization_counter() >=
+        FLAG_deoptimization_counter_inlining_threshold) {
+      return;
+    }
     // Create two call site collections to swap between.
     CallSites sites1(caller_graph_);
     CallSites sites2(caller_graph_);
     CallSites* call_sites_temp = NULL;
     collected_call_sites_ = &sites1;
     inlining_call_sites_ = &sites2;
     // Collect initial call sites.
     collected_call_sites_->FindCallSites(caller_graph_);
     while (collected_call_sites_->HasCalls()) {
       TRACE_INLINING(OS::Print("  Depth %"Pd" ----------\n", inlining_depth_));
@@ skipping 966 matching lines @@
         OS::Print("After Inlining of %s\n", flow_graph_->
                   parsed_function().function().ToFullyQualifiedCString());
         FlowGraphPrinter printer(*flow_graph_);
         printer.PrintBlocks();
       }
     }
   }
 }
 
 }  // namespace dart