8259213: Vector conversion with part > 0 is not getting intrinsic implementation

Reviewed-by: psandoz

Author: Sandhya Viswanathan

src/jdk.incubator.vector/share/classes/jdk/incubator/vector/AbstractShuffle.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -120,6 +120,9 @@ public int[] toArray() {
 
     @ForceInline
     public final VectorShuffle<E> checkIndexes() {
+        if (VectorIntrinsics.VECTOR_ACCESS_OOB_CHECK == 0) {
+            return this;
+        }
         // FIXME: vectorize this
         for (int index : reorder()) {
             if (index < 0) {

src/jdk.incubator.vector/share/classes/jdk/incubator/vector/AbstractVector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -312,7 +312,7 @@ AbstractVector<F> reinterpretShapeTemplate(VectorSpecies<F> toSpecies, int part)
             int origin = shapeChangeOrigin(vsp, rsp, false, part);
             //System.out.println("*** origin = "+origin+", part = "+part+", reinterpret");
             if (part > 0) {  // Expansion: slice first then cast.
-                return slice(origin, vsp.zero()).convert0('X', rsp);
+                return slice(origin).convert0('X', rsp);
             } else {  // Contraction: cast first then unslice.
                 return rsp.zero().slice(rsp.laneCount() - origin,
                                         convert0('X', rsp));
@@ -323,6 +323,9 @@ AbstractVector<F> reinterpretShapeTemplate(VectorSpecies<F> toSpecies, int part)
     @Override
     public abstract AbstractVector<E> slice(int origin, Vector<E> v1);
 
+    @Override
+    public abstract AbstractVector<E> slice(int origin);
+
     /**
      * This is the template for Vector::convertShape, to be
      * specialized by each distinct vector class.
@@ -365,7 +368,7 @@ AbstractVector<F> convertShapeTemplate(Conversion<E,F> conv, VectorSpecies<F> to
             int origin = shapeChangeOrigin(vsp, rsp, true, part);
             //System.out.println("*** origin = "+origin+", part = "+part+", lanewise");
             if (part > 0) {  // Expansion: slice first then cast.
-                return slice(origin, vsp.zero()).convert0(kind, rsp);
+                return slice(origin).convert0(kind, rsp);
             } else {  // Contraction: cast first then unslice.
                 return rsp.zero().slice(rsp.laneCount() - origin,
                                         convert0(kind, rsp));