A64: Synchronize with r15204.

test/mjsunit/array-feedback.js

+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --smi-only-arrays --expose-gc
+// Flags: --track-allocation-sites --noalways-opt
+
+// Test element kind of objects.
+// Since --smi-only-arrays affects builtins, its default setting at compile
+// time sticks if built with snapshot.  If --smi-only-arrays is deactivated
+// by default, only a no-snapshot build actually has smi-only arrays enabled
+// in this test case.  Depending on whether smi-only arrays are actually
+// enabled, this test takes the appropriate code path to check smi-only arrays.
+
+// support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
+support_smi_only_arrays = true;
+optimize_constructed_arrays = true;
+
+if (support_smi_only_arrays) {
+  print("Tests include smi-only arrays.");
+} else {
+  print("Tests do NOT include smi-only arrays.");
+}
+
+if (optimize_constructed_arrays) {
+  print("Tests include constructed array optimizations.");
+} else {
+  print("Tests do NOT include constructed array optimizations.");
+}
+
+var elements_kind = {
+  fast_smi_only            :  'fast smi only elements',
+  fast                     :  'fast elements',
+  fast_double              :  'fast double elements',
+  dictionary               :  'dictionary elements',
+  external_byte            :  'external byte elements',
+  external_unsigned_byte   :  'external unsigned byte elements',
+  external_short           :  'external short elements',
+  external_unsigned_short  :  'external unsigned short elements',
+  external_int             :  'external int elements',
+  external_unsigned_int    :  'external unsigned int elements',
+  external_float           :  'external float elements',
+  external_double          :  'external double elements',
+  external_pixel           :  'external pixel elements'
+}
+
+function getKind(obj) {
+  if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
+  if (%HasFastObjectElements(obj)) return elements_kind.fast;
+  if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
+  if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
+}
+
+function isHoley(obj) {
+  if (%HasFastHoleyElements(obj)) return true;
+  return false;
+}
+
+function assertKind(expected, obj, name_opt) {
+  if (!support_smi_only_arrays &&
+      expected == elements_kind.fast_smi_only) {
+    expected = elements_kind.fast;
+  }
+  assertEquals(expected, getKind(obj), name_opt);
+}
+
+if (support_smi_only_arrays && optimize_constructed_arrays) {
+
+  // Verify that basic elements kind feedback works for non-constructor
+  // array calls (as long as the call is made through an IC, and not
+  // a CallStub).
+  (function (){
+    function create0() {
+      return Array();
+    }
+
+    // Calls through ICs need warm up through uninitialized, then
+    // premonomorphic first.
+    create0();
+    create0();
+    a = create0();
+    assertKind(elements_kind.fast_smi_only, a);
+    a[0] = 3.5;
+    b = create0();
+    assertKind(elements_kind.fast_double, b);
+
+    function create1(arg) {
+      return Array(arg);
+    }
+
+    create1(0);
+    create1(0);
+    a = create1(0);
+    assertFalse(isHoley(a));
+    assertKind(elements_kind.fast_smi_only, a);
+    a[0] = "hello";
+    b = create1(10);
+    assertTrue(isHoley(b));
+    assertKind(elements_kind.fast, b);
+
+    a = create1(100000);
+    assertKind(elements_kind.dictionary, a);
+
+    function create3(arg1, arg2, arg3) {
+      return Array(arg1, arg2, arg3);
+    }
+
+    create3();
+    create3();
+    a = create3(1,2,3);
+    a[0] = 3.5;
+    b = create3(1,2,3);
+    assertKind(elements_kind.fast_double, b);
+    assertFalse(isHoley(b));
+  })();
+
+
+  // Verify that keyed calls work
+  (function (){
+    function create0(name) {
+      return this[name]();
+    }
+
+    name = "Array";
+    create0(name);
+    create0(name);
+    a = create0(name);
+    a[0] = 3.5;
+    b = create0(name);
+    assertKind(elements_kind.fast_double, b);
+  })();
+
+
+  // Verify that the IC can't be spoofed by patching
+  (function (){
+    function create0() {
+      return Array();
+    }
+
+    create0();
+    create0();
+    a = create0();
+    assertKind(elements_kind.fast_smi_only, a);
+    var oldArray = this.Array;
+    this.Array = function() { return ["hi"]; };
+    b = create0();
+    assertEquals(["hi"], b);
+    this.Array = oldArray;
+  })();
+
+  // Verify that calls are still made through an IC after crankshaft,
+  // though the type information is reset.
+  // TODO(mvstanton): instead, consume the type feedback gathered up
+  // until crankshaft time.
+  (function (){
+    function create0() {
+      return Array();
+    }
+
+    create0();
+    create0();
+    a = create0();
+    a[0] = 3.5;
+    %OptimizeFunctionOnNextCall(create0);
+    create0();
+    create0();
+    b = create0();
+    assertKind(elements_kind.fast_smi_only, b);
+    b[0] = 3.5;
+    c = create0();
+    assertKind(elements_kind.fast_double, c);
+    assertTrue(2 != %GetOptimizationStatus(create0));
+  })();
+
+
+  // Verify that cross context calls work
+  (function (){
+    var realmA = Realm.current();
+    var realmB = Realm.create();
+    assertEquals(0, realmA);
+    assertEquals(1, realmB);
+
+    function instanceof_check(type) {
+      assertTrue(type() instanceof type);
+      assertTrue(type(5) instanceof type);
+      assertTrue(type(1,2,3) instanceof type);
+    }
+
+    var realmBArray = Realm.eval(realmB, "Array");
+    instanceof_check(Array);
+    instanceof_check(Array);
+    instanceof_check(Array);
+    instanceof_check(realmBArray);
+    instanceof_check(realmBArray);
+    instanceof_check(realmBArray);
+  })();
+}