For Doubl erounding call C-function instead of attempting to inline it. Fixes issue 8760.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 2179 matching lines @@
     (*inputs)[i]->set_use_index(i);
   }
   deopt_id_ = instance_call->deopt_id();
 }
 
 
 intptr_t InvokeMathCFunctionInstr::ArgumentCountFor(
     MethodRecognizer::Kind kind) {
   switch (kind) {
     case MethodRecognizer::kDoubleTruncate:
-    case MethodRecognizer::kDoubleRound:
     case MethodRecognizer::kDoubleFloor:
     case MethodRecognizer::kDoubleCeil: {
       ASSERT(!CPUFeatures::double_truncate_round_supported());
       return 1;
     }
+    case MethodRecognizer::kDoubleRound:
+      return 1;
     case MethodRecognizer::kDoubleMod:
     case MethodRecognizer::kDoublePow:
       return 2;
     default:
       UNREACHABLE();
   }
   return 0;
 }
 
 // Use expected function signatures to help MSVC compiler resolve overloading.
@@ skipping 42 matching lines @@
     default:
       UNREACHABLE();
   }
   return kPowRuntimeEntry;
 }
 
 
 #undef __
 
 }  // namespace dart