Remove temporary hack for throttling inlining.

runtime/vm/flow_graph_inliner.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/flow_graph_inliner.h"
 
 #include "vm/assert.h"
 #include "vm/compiler.h"
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_builder.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"
 
 namespace dart {
 
 DEFINE_FLAG(bool, trace_inlining, false, "Trace inlining");
 DEFINE_FLAG(charp, inlining_filter, NULL, "Inline only in named function");
 DEFINE_FLAG(int, inlining_size_threshold, 250,
     "Inline only functions with up to threshold instructions");
-DEFINE_FLAG(int, inlining_growth_factor, 3,
-    "Stop inlining when a function grows by the factor");
 DEFINE_FLAG(bool, inline_control_flow, true,
     "Inline functions with control flow.");
 DECLARE_FLAG(bool, print_flow_graph);
 DECLARE_FLAG(int, deoptimization_counter_threshold);
 
 #define TRACE_INLINING(statement)                                              \
   do {                                                                         \
     if (FLAG_trace_inlining) statement;                                        \
   } while (false)
 
@@ skipping 149 matching lines @@
       intptr_t size = callee_graph->InstructionCount();
       if (size > FLAG_inlining_size_threshold) {
         function.set_is_inlinable(false);
         isolate->set_long_jump_base(base);
         isolate->set_deopt_id(prev_deopt_id);
         isolate->set_ic_data_array(prev_ic_data.raw());
         TRACE_INLINING(OS::Print("     Bailout: graph size %"Pd"\n", size));
         return false;
       }
 
-      // If the growth factor is more than threshold abort.
-      double growth =
-          static_cast<double>(inlined_size_ + size) /
-          static_cast<double>(initial_size_);
-      if (growth > static_cast<double>(FLAG_inlining_growth_factor)) {
-        function.set_is_inlinable(false);
-        isolate->set_long_jump_base(base);
-        isolate->set_deopt_id(prev_deopt_id);
-        isolate->set_ic_data_array(prev_ic_data.raw());
-        TRACE_INLINING(OS::Print("     Bailout: growth factor %f\n",
-                                 growth));
-        return false;
-      }
-
       // TODO(zerny): If effort is less than threshold then inline recursively.
 
       // Plug result in the caller graph.
       caller_graph_->InlineCall(call, callee_graph);
       next_ssa_temp_index_ = caller_graph_->max_virtual_register_number();
 
       // Remove push arguments of the call.
       for (intptr_t i = 0; i < call->ArgumentCount(); ++i) {
         PushArgumentInstr* push = call->ArgumentAt(i);
         push->ReplaceUsesWith(push->value()->definition());
@@ skipping 137 matching lines @@
         OS::Print("After Inlining of %s\n", flow_graph_->
                   parsed_function().function().ToFullyQualifiedCString());
         FlowGraphPrinter printer(*flow_graph_);
         printer.PrintBlocks();
       }
     }
   }
 }
 
 }  // namespace dart