Min/max SIMDization support.

Rationale:
The more vectorized, the better!

Test: test-art-target, test-art-host

Change-Id: I758becca5beaa5b97fab2ab70f2e00cb53458703
diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index e5d94c3..02816cf 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -514,6 +514,14 @@
     StartAttributeStream("rounded") << std::boolalpha << hadd->IsRounded() << std::noboolalpha;
   }
 
+  void VisitVecMin(HVecMin* min) OVERRIDE {
+    StartAttributeStream("unsigned") << std::boolalpha << min->IsUnsigned() << std::noboolalpha;
+  }
+
+  void VisitVecMax(HVecMax* max) OVERRIDE {
+    StartAttributeStream("unsigned") << std::boolalpha << max->IsUnsigned() << std::noboolalpha;
+  }
+
   void VisitVecMultiplyAccumulate(HVecMultiplyAccumulate* instruction) OVERRIDE {
     StartAttributeStream("kind") << instruction->GetOpKind();
   }