In AllocateAnyRegister allow spliting at blocked_at position inclusive.

runtime/vm/flow_graph_allocator.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_allocator.h"
 
 #include "vm/bit_vector.h"
 #include "vm/intermediate_language.h"
 #include "vm/il_printer.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 1478 matching lines @@
     SpillBetween(unallocated, unallocated->Start(), register_use->pos());
     return;
   }
 
   TRACE_ALLOC(OS::Print("assigning blocked register "));
   TRACE_ALLOC(Location::RegisterLocation(candidate).Print());
   TRACE_ALLOC(OS::Print(" to live range %d until %d\n",
                         unallocated->vreg(), blocked_at));
 
   if (blocked_at < unallocated->End()) {
+    // Register is blocked before the end of the live range.  Split the range
+    // at latest at blocked_at position.
     LiveRange* tail = SplitBetween(unallocated,
                                    unallocated->Start(),
-                                   blocked_at);
+                                   blocked_at + 1);
     AddToUnallocated(tail);
   }
 
   AssignNonFreeRegister(unallocated, candidate);
 }
 
 
 bool FlowGraphAllocator::UpdateFreeUntil(Register reg,
                                          LiveRange* unallocated,
                                          intptr_t* cur_free_until,
@@ skipping 429 matching lines @@
     OS::Print("-- [after ssa allocator] ir [%s] -------------\n",
               function.ToFullyQualifiedCString());
     FlowGraphPrinter printer(Function::Handle(), block_order_, true);
     printer.PrintBlocks();
     OS::Print("----------------------------------------------\n");
   }
 }
 
 
 }  // namespace dart