VM: [DBC] Fix lazy deoptimization after calls that return no values.

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 797 matching lines @@
 }
 
 
 void FlowGraphCompiler::AddStubCallTarget(const Code& code) {
   ASSERT(code.IsZoneHandle());
   static_calls_target_table_.Add(
       new (zone()) StaticCallsStruct(assembler()->CodeSize(), NULL, &code));
 }
 
 
-void FlowGraphCompiler::AddDeoptIndexAtCall(intptr_t deopt_id) {
+CompilerDeoptInfo* FlowGraphCompiler::AddDeoptIndexAtCall(intptr_t deopt_id) {
   ASSERT(is_optimizing());
   ASSERT(!intrinsic_mode());
   CompilerDeoptInfo* info =
       new (zone()) CompilerDeoptInfo(deopt_id, ICData::kDeoptAtCall,
                                      0,  // No flags.
                                      pending_deoptimization_env_);
   info->set_pc_offset(assembler()->CodeSize());
   deopt_infos_.Add(info);
+  return info;
 }
 
 
 // This function must be in sync with FlowGraphCompiler::SaveLiveRegisters
 // and FlowGraphCompiler::SlowPathEnvironmentFor.
 // See StackFrame::VisitObjectPointers for the details of how stack map is
 // interpreted.
 void FlowGraphCompiler::RecordSafepoint(LocationSummary* locs,
                                         intptr_t slow_path_argument_count) {
   if (is_optimizing() || locs->live_registers()->HasUntaggedValues()) {
@@ skipping 1144 matching lines @@
 
 
 void FlowGraphCompiler::FrameStateClear() {
   ASSERT(!is_optimizing());
   frame_state_.TruncateTo(0);
 }
 #endif  // defined(DEBUG) && !defined(TARGET_ARCH_DBC)
 
 
 }  // namespace dart