ART: Enable scalar loop peeling and unrolling.

Turn on scalar loop peeling and unrolling by default.

Test: 482-checker-loop-back-edge-use, 530-checker-peel-unroll
Test: test-art-host, test-art-target, boot-to-gui
Change-Id: Ibfe1b54f790a97b281e85396da2985e0f22c2834
diff --git a/compiler/optimizing/loop_optimization.h b/compiler/optimizing/loop_optimization.h
index 7807da1..191a93d 100644
--- a/compiler/optimizing/loop_optimization.h
+++ b/compiler/optimizing/loop_optimization.h
@@ -28,7 +28,7 @@
 namespace art {
 
 class CompilerDriver;
-class ArchDefaultLoopHelper;
+class ArchNoOptsLoopHelper;
 
 /**
  * Loop optimizations. Builds a loop hierarchy and applies optimizations to
@@ -308,7 +308,7 @@
   HInstruction* vector_index_;  // normalized index of the new loop
 
   // Helper for target-specific behaviour for loop optimizations.
-  ArchDefaultLoopHelper* arch_loop_helper_;
+  ArchNoOptsLoopHelper* arch_loop_helper_;
 
   friend class LoopOptimizationTest;