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/register_allocator_test.cc b/compiler/optimizing/register_allocator_test.cc
index ba4be34..8d75db9 100644
--- a/compiler/optimizing/register_allocator_test.cc
+++ b/compiler/optimizing/register_allocator_test.cc
@@ -41,7 +41,7 @@
   HGraph* graph = builder.BuildGraph(*item);
   graph->BuildDominatorTree();
   graph->TransformToSSA();
-  graph->FindNaturalLoops();
+  graph->AnalyzeNaturalLoops();
   x86::CodeGeneratorX86 codegen(graph);
   SsaLivenessAnalysis liveness(*graph, &codegen);
   liveness.Analyze();
@@ -255,7 +255,7 @@
   HGraph* graph = builder.BuildGraph(*item);
   graph->BuildDominatorTree();
   graph->TransformToSSA();
-  graph->FindNaturalLoops();
+  graph->AnalyzeNaturalLoops();
   return graph;
 }
 
@@ -494,7 +494,7 @@
   (*phi)->AddInput(*input2);
 
   graph->BuildDominatorTree();
-  graph->FindNaturalLoops();
+  graph->AnalyzeNaturalLoops();
   return graph;
 }