Improved subscript and data dependence analysis.

Rationale:
We missed vectorizing a simple stencil operation
due to inaccurate unit stride analysis and failure
to detect single runtime data dependence test.

Test: test-art-host, test-art-target
Change-Id: I07ba03455bfb1c0aff371c1244a1328f885d0916
diff --git a/compiler/optimizing/induction_var_range.h b/compiler/optimizing/induction_var_range.h
index a8ee829..ab1772b 100644
--- a/compiler/optimizing/induction_var_range.h
+++ b/compiler/optimizing/induction_var_range.h
@@ -163,6 +163,7 @@
    */
   bool IsUnitStride(HInstruction* context,
                     HInstruction* instruction,
+                    HGraph* graph,
                     /*out*/ HInstruction** offset) const;
 
   /**