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/liveness_test.cc b/compiler/optimizing/liveness_test.cc
index 246e7ef..4b69e57 100644
--- a/compiler/optimizing/liveness_test.cc
+++ b/compiler/optimizing/liveness_test.cc
@@ -50,7 +50,7 @@
   ASSERT_NE(graph, nullptr);
   graph->BuildDominatorTree();
   graph->TransformToSSA();
-  graph->FindNaturalLoops();
+  graph->AnalyzeNaturalLoops();
   // `Inline` conditions into ifs.
   PrepareForRegisterAllocation(graph).Run();
   x86::CodeGeneratorX86 codegen(graph);