A change in the way we place TransitionElementKinds in the tree.

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 338060f3fc0d3074252a18cc122903c0d99fae78..f8b86ee6ab02d4694b523a949e7c2a2e4732206e 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -172,6 +172,9 @@ DEFINE_string(hydrogen_filter, "", "optimization filter")
 DEFINE_bool(use_range, true, "use hydrogen range analysis")
 DEFINE_bool(eliminate_dead_phis, true, "eliminate dead phis")
 DEFINE_bool(use_gvn, true, "use hydrogen global value numbering")
+DEFINE_bool(use_place_elements_transitions,
+            true,
+            "use optimized placement of elements transitions")
 DEFINE_bool(use_canonicalizing, true, "use hydrogen instruction canonicalizing")
 DEFINE_bool(use_inlining, true, "use function inlining")
 DEFINE_int(max_inlined_source_size, 600,
@@ -192,6 +195,9 @@ DEFINE_bool(trace_inlining, false, "trace inlining decisions")
 DEFINE_bool(trace_alloc, false, "trace register allocator")
 DEFINE_bool(trace_all_uses, false, "trace all use positions")
 DEFINE_bool(trace_range, false, "trace range analysis")
+DEFINE_bool(trace_transition_placement,
+            false,
+            "trace elementskind transition placement")
 DEFINE_bool(trace_gvn, false, "trace global value numbering")
 DEFINE_bool(trace_representation, false, "trace representation types")
 DEFINE_bool(stress_pointer_maps, false, "pointer map for every instruction")