Implement halving add idiom (with checker tests).

Rationale:
First of several idioms that map to very efficient SIMD instructions.
Note that the is-zero-ext and is-sign-ext are general-purpose utilities
that will be widely used in the vectorizer to detect low precision
idioms, so expect that code to be shared with many CLs to come.

Test: test-art-host, test-art-target
Change-Id: If7dc2926c72a2e4b5cea15c44ef68cf5503e9be9

1 files changed, 5 insertions, 0 deletions

diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index cc3c143b15..1b2b9f80ac 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -509,6 +509,11 @@ class HGraphVisualizerPrinter : public HGraphDelegateVisitor {
     StartAttributeStream("kind") << deoptimize->GetKind();
   }
 
+  void VisitVecHalvingAdd(HVecHalvingAdd* hadd) OVERRIDE {
+    StartAttributeStream("unsigned") << std::boolalpha << hadd->IsUnsigned() << std::noboolalpha;
+    StartAttributeStream("rounded") << std::boolalpha << hadd->IsRounded() << std::noboolalpha;
+  }
+
 #if defined(ART_ENABLE_CODEGEN_arm) || defined(ART_ENABLE_CODEGEN_arm64)
   void VisitMultiplyAccumulate(HMultiplyAccumulate* instruction) OVERRIDE {
     StartAttributeStream("kind") << instruction->GetOpKind();