Treat SSA transformation special, as we may have to bailout.

We forgot to bailout when we found a non-natural loop (on which
our optimizations don't work).

Change-Id: I11976b5af4c98f4f29267a74c74d34b5ad81e20c
diff --git a/compiler/optimizing/live_ranges_test.cc b/compiler/optimizing/live_ranges_test.cc
index e3c6fec..5c7e6f0 100644
--- a/compiler/optimizing/live_ranges_test.cc
+++ b/compiler/optimizing/live_ranges_test.cc
@@ -38,7 +38,7 @@
   RemoveSuspendChecks(graph);
   graph->BuildDominatorTree();
   graph->TransformToSSA();
-  graph->FindNaturalLoops();
+  graph->AnalyzeNaturalLoops();
   // `Inline` conditions into ifs.
   PrepareForRegisterAllocation(graph).Run();
   return graph;