v8/test/mjsunit/compiler/inline-accessors.js

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// 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 --inline-accessors --max-opt-count=100
var accessorCallCount, setterArgument, setterValue, obj, forceDeopt;
// -----------------------------------------------------------------------------
// Helpers for testing inlining of getters.
function TestInlinedGetter(context, obj, expected) {
forceDeopt = { deopt: 0 };
accessorCallCount = 0;
assertEquals(expected, context(obj));
assertEquals(1, accessorCallCount);
assertEquals(expected, context(obj));
assertEquals(2, accessorCallCount);
%OptimizeFunctionOnNextCall(context);
assertEquals(expected, context(obj));
assertEquals(3, accessorCallCount);
forceDeopt = { /* empty*/ };
assertEquals(expected, context(obj));
assertEquals(4, accessorCallCount);
}
function value_context_for_getter(obj) {
return obj.getterProperty;
}
function test_context_for_getter(obj) {
if (obj.getterProperty) {
return 111;
} else {
return 222;
}
}
function effect_context_for_getter(obj) {
obj.getterProperty;
return 5678;
}
function TryGetter(context, getter, obj, expected, expectException) {
try {
TestInlinedGetter(context, obj, expected);
assertFalse(expectException);
} catch (exception) {
assertTrue(expectException);
assertEquals(7, exception.stack.split('\n').length);
}
%DeoptimizeFunction(context);
%ClearFunctionTypeFeedback(context);
%ClearFunctionTypeFeedback(getter);
}
function TestGetterInAllContexts(getter, obj, expected, expectException) {
TryGetter(value_context_for_getter, getter, obj, expected, expectException);
TryGetter(test_context_for_getter, getter, obj, expected ? 111 : 222,
expectException);
TryGetter(effect_context_for_getter, getter, obj, 5678, expectException);
}
// -----------------------------------------------------------------------------
// Test getter returning something 'true'ish in all contexts.
function getter1() {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
return 1234;
}
function ConstrG1() { }
obj = Object.defineProperty(new ConstrG1(), "getterProperty", { get: getter1 });
TestGetterInAllContexts(getter1, obj, 1234, false);
obj = Object.create(obj);
TestGetterInAllContexts(getter1, obj, 1234, false);
// -----------------------------------------------------------------------------
// Test getter returning false in all contexts.
function getter2() {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
return false;
}
function ConstrG2() { }
obj = Object.defineProperty(new ConstrG2(), "getterProperty", { get: getter2 });
TestGetterInAllContexts(getter2, obj, false, false);
obj = Object.create(obj);
TestGetterInAllContexts(getter2, obj, false, false);
// -----------------------------------------------------------------------------
// Test getter without a return in all contexts.
function getter3() {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
}
function ConstrG3() { }
obj = Object.defineProperty(new ConstrG3(), "getterProperty", { get: getter3 });
TestGetterInAllContexts(getter3, obj, undefined, false);
obj = Object.create(obj);
TestGetterInAllContexts(getter3, obj, undefined, false);
// -----------------------------------------------------------------------------
// Test getter with too many arguments without a return in all contexts.
function getter4(a) {
assertSame(obj, this);
assertEquals(undefined, a);
accessorCallCount++;
forceDeopt.deopt;
}
function ConstrG4() { }
obj = Object.defineProperty(new ConstrG4(), "getterProperty", { get: getter4 });
TestGetterInAllContexts(getter4, obj, undefined, false);
obj = Object.create(obj);
TestGetterInAllContexts(getter4, obj, undefined, false);
// -----------------------------------------------------------------------------
// Test getter with too many arguments with a return in all contexts.
function getter5(a) {
assertSame(obj, this);
assertEquals(undefined, a);
accessorCallCount++;
forceDeopt.deopt;
return 9876;
}
function ConstrG5() { }
obj = Object.defineProperty(new ConstrG5(), "getterProperty", { get: getter5 });
TestGetterInAllContexts(getter5, obj, 9876, false);
obj = Object.create(obj);
TestGetterInAllContexts(getter5, obj, 9876, false);
// -----------------------------------------------------------------------------
// Test getter which throws from optimized code.
function getter6() {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
if (accessorCallCount == 4) { 123 in null; }
return 13579;
}
function ConstrG6() { }
obj = Object.defineProperty(new ConstrG6(), "getterProperty", { get: getter6 });
TestGetterInAllContexts(getter6, obj, 13579, true);
obj = Object.create(obj);
TestGetterInAllContexts(getter6, obj, 13579, true);
// -----------------------------------------------------------------------------
// Helpers for testing inlining of setters.
function TestInlinedSetter(context, obj, value, expected) {
forceDeopt = { deopt: 0 };
accessorCallCount = 0;
setterArgument = value;
assertEquals(expected, context(obj, value));
assertEquals(value, setterValue);
assertEquals(1, accessorCallCount);
assertEquals(expected, context(obj, value));
assertEquals(value, setterValue);
assertEquals(2, accessorCallCount);
%OptimizeFunctionOnNextCall(context);
assertEquals(expected, context(obj, value));
assertEquals(value, setterValue);
assertEquals(3, accessorCallCount);
forceDeopt = { /* empty*/ };
assertEquals(expected, context(obj, value));
assertEquals(value, setterValue);
assertEquals(4, accessorCallCount);
}
function value_context_for_setter(obj, value) {
return obj.setterProperty = value;
}
function test_context_for_setter(obj, value) {
if (obj.setterProperty = value) {
return 333;
} else {
return 444;
}
}
function effect_context_for_setter(obj, value) {
obj.setterProperty = value;
return 666;
}
function TrySetter(context, setter, obj, expectException, value, expected) {
try {
TestInlinedSetter(context, obj, value, expected);
assertFalse(expectException);
} catch (exception) {
assertTrue(expectException);
assertEquals(7, exception.stack.split('\n').length);
}
%DeoptimizeFunction(context);
%ClearFunctionTypeFeedback(context);
%ClearFunctionTypeFeedback(setter);
}
function TestSetterInAllContexts(setter, obj, expectException) {
TrySetter(value_context_for_setter, setter, obj, expectException, 111, 111);
TrySetter(test_context_for_setter, setter, obj, expectException, true, 333);
TrySetter(test_context_for_setter, setter, obj, expectException, false, 444);
TrySetter(effect_context_for_setter, setter, obj, expectException, 555, 666);
}
// -----------------------------------------------------------------------------
// Test setter without a return in all contexts.
function setter1(value) {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
setterValue = value;
}
function ConstrS1() { }
obj = Object.defineProperty(new ConstrS1(), "setterProperty", { set: setter1 });
TestSetterInAllContexts(setter1, obj, false);
obj = Object.create(obj);
TestSetterInAllContexts(setter1, obj, false);
// -----------------------------------------------------------------------------
// Test setter returning something different than the RHS in all contexts.
function setter2(value) {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
setterValue = value;
return 1000000;
}
function ConstrS2() { }
obj = Object.defineProperty(new ConstrS2(), "setterProperty", { set: setter2 });
TestSetterInAllContexts(setter2, obj, false);
obj = Object.create(obj);
TestSetterInAllContexts(setter2, obj, false);
// -----------------------------------------------------------------------------
// Test setter with too few arguments without a return in all contexts.
function setter3() {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
setterValue = setterArgument;
}
function ConstrS3() { }
obj = Object.defineProperty(new ConstrS3(), "setterProperty", { set: setter3 });
TestSetterInAllContexts(setter3, obj, false);
obj = Object.create(obj);
TestSetterInAllContexts(setter3, obj, false);
// -----------------------------------------------------------------------------
// Test setter with too few arguments with a return in all contexts.
function setter4() {
assertSame(obj, this);
accessorCallCount++;
forceDeopt.deopt;
setterValue = setterArgument;
return 2000000;
}
function ConstrS4() { }
obj = Object.defineProperty(new ConstrS4(), "setterProperty", { set: setter4 });
TestSetterInAllContexts(setter4, obj, false);
obj = Object.create(obj);
TestSetterInAllContexts(setter4, obj, false);
// -----------------------------------------------------------------------------
// Test setter with too many arguments without a return in all contexts.
function setter5(value, foo) {
assertSame(obj, this);
assertEquals(undefined, foo);
accessorCallCount++;
forceDeopt.deopt;
setterValue = value;
}
function ConstrS5() { }
obj = Object.defineProperty(new ConstrS5(), "setterProperty", { set: setter5 });
TestSetterInAllContexts(setter5, obj, false);
obj = Object.create(obj);
TestSetterInAllContexts(setter5, obj, false);
// -----------------------------------------------------------------------------
// Test setter with too many arguments with a return in all contexts.
function setter6(value, foo) {
assertSame(obj, this);
assertEquals(undefined, foo);
accessorCallCount++;
forceDeopt.deopt;
setterValue = value;
return 3000000;
}
function ConstrS6() { }
obj = Object.defineProperty(new ConstrS6(), "setterProperty", { set: setter6 });
TestSetterInAllContexts(setter6, obj, false);
obj = Object.create(obj);
TestSetterInAllContexts(setter6, obj, false);
// -----------------------------------------------------------------------------
// Test setter which throws from optimized code.
function setter7(value) {
accessorCallCount++;
forceDeopt.deopt;
if (accessorCallCount == 4) { 123 in null; }
setterValue = value;
}
function ConstrS7() { }
obj = Object.defineProperty(new ConstrS7(), "setterProperty", { set: setter7 });
TestSetterInAllContexts(setter7, obj, true);
obj = Object.create(obj);
TestSetterInAllContexts(setter7, obj, true);