ARM64: Use the shifter operands.

This introduces architecture-specific instruction simplification.
On ARM64 we try to merge shifts and sign-extension operations into
arithmetic and logical instructions.

For example for the Java code

    int res = a + (b << 5);

we would generate

    lsl w3, w2, #5
    add w0, w1, w3

and we now generate

    add w0, w1, w2, lsl #5

Change-Id: Ic03bdff44a1c12e21ddff1b0513bd32a730742b7

1 files changed, 7 insertions, 0 deletions

diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index 4438190ec3..48bcd10b10 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -423,6 +423,13 @@ class HGraphVisualizerPrinter : public HGraphDelegateVisitor {
   }
 
 #ifdef ART_ENABLE_CODEGEN_arm64
+  void VisitArm64DataProcWithShifterOp(HArm64DataProcWithShifterOp* instruction) OVERRIDE {
+    StartAttributeStream("kind") << instruction->GetInstrKind() << "+" << instruction->GetOpKind();
+    if (HArm64DataProcWithShifterOp::IsShiftOp(instruction->GetOpKind())) {
+      StartAttributeStream("shift") << instruction->GetShiftAmount();
+    }
+  }
+
   void VisitArm64MultiplyAccumulate(HArm64MultiplyAccumulate* instruction) OVERRIDE {
     StartAttributeStream("kind") << instruction->GetOpKind();
   }