Add support for OSR in kernel-based FlowGraphBuilder

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/bootstrap.h"
 #include "vm/compiler.h"
 #include "vm/constant_propagator.h"
@@ skipping 957 matching lines @@
   for (ForwardInstructionIterator it(this); !it.Done(); it.Advance()) {
     last = it.Current();
   }
   set_last_instruction(last);
   if (last->IsGoto()) last->AsGoto()->set_block(this);
 
   return true;
 }
 
 
-bool BlockEntryInstr::PruneUnreachable(FlowGraphBuilder* builder,
-                                       GraphEntryInstr* graph_entry,
+bool BlockEntryInstr::PruneUnreachable(GraphEntryInstr* graph_entry,
                                        Instruction* parent,
                                        intptr_t osr_id,
                                        BitVector* block_marks) {
   // Search for the instruction with the OSR id.  Use a depth first search
   // because basic blocks have not been discovered yet.  Prune unreachable
   // blocks by replacing the normal entry with a jump to the block
   // containing the OSR entry point.
 
   // Do not visit blocks more than once.
   if (block_marks->Contains(block_id())) return false;
@@ skipping 15 matching lines @@
 
       GotoInstr* goto_join = new GotoInstr(AsJoinEntry());
       goto_join->CopyDeoptIdFrom(*parent);
       graph_entry->normal_entry()->LinkTo(goto_join);
       return true;
     }
   }
 
   // Recursively search the successors.
   for (intptr_t i = instr->SuccessorCount() - 1; i >= 0; --i) {
-    if (instr->SuccessorAt(i)->PruneUnreachable(builder,
-                                                graph_entry,
+    if (instr->SuccessorAt(i)->PruneUnreachable(graph_entry,
                                                 instr,
                                                 osr_id,
                                                 block_marks)) {
       return true;
     }
   }
   return false;
 }
 
 
@@ skipping 2839 matching lines @@
   set_native_c_function(native_function);
   function().SetIsNativeAutoSetupScope(auto_setup_scope);
   Dart_NativeEntryResolver resolver = library.native_entry_resolver();
   bool is_bootstrap_native = Bootstrap::IsBootstapResolver(resolver);
   set_is_bootstrap_native(is_bootstrap_native);
 }
 
 #undef __
 
 }  // namespace dart