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

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/code_generator.h"
@@ skipping 30 matching lines @@
     "Do conditional constant propagation/unreachable code elimination.");
 DEFINE_FLAG(bool, common_subexpression_elimination, true,
     "Do common subexpression elimination.");
 DEFINE_FLAG(bool, loop_invariant_code_motion, true,
     "Do loop invariant code motion.");
 DEFINE_FLAG(bool, propagate_types, true, "Do static type propagation.");
 DEFINE_FLAG(bool, allocation_sinking, true,
     "attempt to sink temporary allocations to side exits");
 DEFINE_FLAG(int, deoptimization_counter_threshold, 16,
     "How many times we allow deoptimization before we disallow optimization.");
+DEFINE_FLAG(int, deoptimization_counter_licm_threshold, 8,
+    "How many times we allow deoptimization before we disable LICM.");
 DEFINE_FLAG(bool, use_inlining, true, "Enable call-site inlining");
 DEFINE_FLAG(bool, range_analysis, true, "Enable range analysis");
 DEFINE_FLAG(bool, verify_compiler, false,
     "Enable compiler verification assertions");
 DECLARE_FLAG(bool, print_flow_graph);
 DECLARE_FLAG(bool, print_flow_graph_optimized);
 DECLARE_FLAG(bool, trace_failed_optimization_attempts);
 
 // Compile a function. Should call only if the function has not been compiled.
 //   Arg0: function object.
@@ skipping 332 matching lines @@
           DEBUG_ASSERT(flow_graph->VerifyUseLists());
           // Do another round of CSE to take secondary effects into account:
           // e.g. when eliminating dependent loads (a.x[0] + a.x[0])
           // TODO(fschneider): Change to a one-pass optimization pass.
           DominatorBasedCSE::Optimize(flow_graph);
           DEBUG_ASSERT(flow_graph->VerifyUseLists());
         }
       }
       if (FLAG_loop_invariant_code_motion &&
           (function.deoptimization_counter() <
-           (FLAG_deoptimization_counter_threshold - 1))) {
+           FLAG_deoptimization_counter_licm_threshold)) {
         LICM licm(flow_graph);
         licm.Optimize();
         DEBUG_ASSERT(flow_graph->VerifyUseLists());
       }
       flow_graph->RemoveRedefinitions();
 
       if (FLAG_range_analysis) {
         if (FLAG_propagate_types) {
           // Propagate types after store-load-forwarding. Some phis may have
           // become smi phis that can be processed by range analysis.
@@ skipping 463 matching lines @@
       Object::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     isolate->set_long_jump_base(base);
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart