Emit switchable instance calls when we don't know the complete set of receiver classes for a call s…

runtime/vm/flow_graph_compiler.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/globals.h"  // Needed here to get TARGET_ARCH_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
@@ skipping 1897 matching lines @@
     assembler()->Bind(&ok);
   } else {
     if (complete) {
       Label ok;
       EmitTestAndCall(ic_data, argument_count, argument_names,
                       NULL,                      // No cid match.
                       &ok,                       // Found cid.
                       deopt_id, token_pos, locs, true);
       assembler()->Bind(&ok);
     } else {
-      // Instead of deoptimizing, do a megamorphic call when no matching
-      // cid found.
-      Label ok;
-      MegamorphicSlowPath* slow_path =
-        new MegamorphicSlowPath(ic_data, argument_count, deopt_id,
-                                token_pos, locs, CurrentTryIndex());
-      AddSlowPathCode(slow_path);
-      EmitTestAndCall(ic_data, argument_count, argument_names,
-                      slow_path->entry_label(),  // No cid match.
-                      &ok,                       // Found cid.
-                      deopt_id, token_pos, locs, false);
-
-      assembler()->Bind(slow_path->exit_label());
-      assembler()->Bind(&ok);
+      EmitSwitchableInstanceCall(ic_data, argument_count,
+                                 deopt_id, token_pos, locs);
     }
   }
 }
 #endif
 
 #if defined(DEBUG) && !defined(TARGET_ARCH_DBC)
 // TODO(vegorov) re-enable frame state tracking on DBC. It is
 // currently disabled because it relies on LocationSummaries and
 // we don't use them during unoptimized compilation on DBC.
 void FlowGraphCompiler::FrameStateUpdateWith(Instruction* instr) {
@@ skipping 62 matching lines @@
 
 
 void FlowGraphCompiler::FrameStateClear() {
   ASSERT(!is_optimizing());
   frame_state_.TruncateTo(0);
 }
 #endif  // defined(DEBUG) && !defined(TARGET_ARCH_DBC)
 
 
 }  // namespace dart