Allow splitting at lifetime holes.

runtime/vm/flow_graph_allocator.cc

Index: runtime/vm/flow_graph_allocator.cc
diff --git a/runtime/vm/flow_graph_allocator.cc b/runtime/vm/flow_graph_allocator.cc
index ed0d2625bb29057dc9d1e6904ce30ac9e043dfd7..ba81b7051fd1d88b6c45a0db64e6b282649a644e 100644
--- a/runtime/vm/flow_graph_allocator.cc
+++ b/runtime/vm/flow_graph_allocator.cc
@@ -1353,8 +1353,9 @@ LiveRange* LiveRange::SplitAt(intptr_t split_pos) {
 
   ASSERT(split_pos < End());
 
-  // Corner case. We need to start over to find previous interval.
-  if (interval->start() == split_pos) interval = first_use_interval_;
+  // Corner case. Split position can be inside the lifetime hole or at its

[Florian Schneider, 2012/10/22 13:08:53]

did you mean: inside _a_ lifetime hole?

+  // end. We need to start over to find the previous interval.
+  if (split_pos <= interval->start()) interval = first_use_interval_;
 
   UseInterval* last_before_split = NULL;
   while (interval->end() <= split_pos) {