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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --expose-gc --turbo-inline-array-builtins
// Flags: --opt --no-always-opt
var a = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,0,0];
var b = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25];
var c = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25];
// Unknown field access leads to soft-deopt unrelated to map, should still
// lead to correct result.
(function() {
var result = 0;
var eagerDeoptInCalled = function(deopt) {
var callback = function(v,i,o) {
result += v;
if (i == 13 && deopt) {
a.abc = 25;
}
return v;
}
a.map(callback);
}
eagerDeoptInCalled();
eagerDeoptInCalled();
%OptimizeFunctionOnNextCall(eagerDeoptInCalled);
eagerDeoptInCalled();
eagerDeoptInCalled(true);
eagerDeoptInCalled();
assertEquals(1500, result);
})();
// Length change detected during loop, must cause properly handled eager deopt.
(function() {
var result = 0;
var eagerDeoptInCalled = function(deopt) {
var callback = function(v,i,o) {
result += v;
a.length = (i == 13 && deopt) ? 25 : 27;
return v;
}
a.map(callback);
}
eagerDeoptInCalled();
eagerDeoptInCalled();
%OptimizeFunctionOnNextCall(eagerDeoptInCalled);
eagerDeoptInCalled();
eagerDeoptInCalled(true);
eagerDeoptInCalled();
assertEquals(1500, result);
})();
// Escape analyzed array
(function() {
var result = 0;
var eagerDeoptInCalled = function(deopt) {
var a_noescape = [0,1,2,3,4,5];
var callback = function(v,i,o) {
result += v;
if (i == 13 && deopt) {
a_noescape.length = 25;
}
return v;
}
a_noescape.map(callback);
}
eagerDeoptInCalled();
eagerDeoptInCalled();
%OptimizeFunctionOnNextCall(eagerDeoptInCalled);
eagerDeoptInCalled();
eagerDeoptInCalled(true);
eagerDeoptInCalled();
assertEquals(75, result);
})();
// Escape analyzed array where callback function isn't inlined, forcing a lazy
// deopt with GC that relies on the stashed-away return result fro the lazy
// deopt being properly stored in a place on the stack that gets GC'ed.
(function() {
var result = 0;
var lazyDeopt = function(deopt) {
var b = [1,2,3];
var callback = function(v,i,o) {
result += i;
if (i == 1 && deopt) {
%DeoptimizeFunction(lazyDeopt);
}
gc(); gc();
return v;
};
%NeverOptimizeFunction(callback);
b.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
lazyDeopt(true);
lazyDeopt();
})();
// Escape analyzed array where callback function isn't inlined, forcing a lazy
// deopt. Check that the result of the callback function is passed correctly
// to the lazy deopt and that the final result of map is as expected.
(function() {
var lazyDeopt = function(deopt) {
var b = [1,2,3];
var callback = function(v,i,o) {
if (i == 1 && deopt) {
%DeoptimizeFunction(lazyDeopt);
}
return 2 * v;
};
%NeverOptimizeFunction(callback);
return b.map(callback);
}
assertEquals([2,4,6], lazyDeopt());
assertEquals([2,4,6], lazyDeopt());
%OptimizeFunctionOnNextCall(lazyDeopt);
assertEquals([2,4,6], lazyDeopt(true));
})();
// Lazy deopt from runtime call from inlined callback function.
(function() {
var result = 0;
var lazyDeopt = function(deopt) {
var callback = function(v,i,o) {
result += i;
if (i == 13 && deopt) {
%DeoptimizeNow();
}
return v;
}
b.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
lazyDeopt(true);
lazyDeopt();
assertEquals(1500, result);
})();
// Lazy deopt from runtime call from non-inline callback function.
(function() {
var result = 0;
var lazyDeopt = function(deopt) {
var callback = function(v,i,o) {
result += i;
if (i == 13 && deopt) {
%DeoptimizeNow();
}
return v;
};
%NeverOptimizeFunction(callback);
b.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
lazyDeopt(true);
lazyDeopt();
assertEquals(1500, result);
})();
(function() {
var result = 0;
var lazyDeopt = function(deopt) {
var callback = function(v,i,o) {
result += i;
if (i == 13 && deopt) {
%DeoptimizeNow();
gc();
gc();
gc();
}
return v;
}
c.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
lazyDeopt(true);
lazyDeopt();
assertEquals(1500, result);
})();
// Call to a.map is done inside a try-catch block and the callback function
// being called actually throws.
(function() {
var caught = false;
var result = 0;
var lazyDeopt = function(deopt) {
var callback = function(v,i,o) {
result += i;
if (i == 1 && deopt) {
throw("a");
}
return v;
}
try {
c.map(callback);
} catch (e) {
caught = true;
}
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
assertDoesNotThrow(lazyDeopt.bind(this, true));
assertTrue(caught);
lazyDeopt();
})();
// Call to a.map is done inside a try-catch block and the callback function
// being called actually throws, but the callback is not inlined.
(function() {
var caught = false;
var result = 0;
var lazyDeopt = function(deopt) {
var callback = function(v,i,o) {
result += i;
if (i == 1 && deopt) {
throw("a");
}
return v;
};
%NeverOptimizeFunction(callback);
try {
c.map(callback);
} catch (e) {
caught = true;
}
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
assertDoesNotThrow(lazyDeopt.bind(this, true));
assertTrue(caught);
lazyDeopt();
})();
// Call to a.map is done inside a try-catch block and the callback function
// being called throws into a deoptimized caller function.
(function TestThrowIntoDeoptimizedOuter() {
var a = [1,2,3,4];
var lazyDeopt = function(deopt) {
var callback = function(v,i,o) {
if (i == 1 && deopt) {
%DeoptimizeFunction(lazyDeopt);
throw "some exception";
}
return 2 * v;
};
%NeverOptimizeFunction(callback);
var result = 0;
try {
result = a.map(callback);
} catch (e) {
assertEquals("some exception", e)
result = "nope";
}
return result;
}
assertEquals([2,4,6,8], lazyDeopt(false));
assertEquals([2,4,6,8], lazyDeopt(false));
assertEquals("nope", lazyDeopt(true));
assertEquals("nope", lazyDeopt(true));
%OptimizeFunctionOnNextCall(lazyDeopt);
assertEquals([2,4,6,8], lazyDeopt(false));
assertEquals("nope", lazyDeopt(true));
})();
(function() {
var re = /Array\.map/;
var lazyDeopt = function(deopt) {
var b = [1,2,3];
var result = 0;
var callback = function(v,i,o) {
result += v;
if (i == 1) {
var e = new Error();
assertTrue(re.exec(e.stack) !== null);
}
return v;
};
var o = [1,2,3];
b.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
})();
(function() {
var re = /Array\.map/;
var lazyDeopt = function(deopt) {
var b = [1,2,3];
var result = 0;
var callback = function(v,i,o) {
result += v;
if (i == 1) {
var e = new Error();
assertTrue(re.exec(e.stack) !== null);
}
return v;
};
%NeverOptimizeFunction(callback);
var o = [1,2,3];
b.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
})();
(function() {
var re = /Array\.map/;
var lazyDeopt = function(deopt) {
var b = [1,2,3];
var result = 0;
var callback = function(v,i,o) {
result += v;
if (i == 1) {
%DeoptimizeNow();
} else if (i == 2) {
var e = new Error();
assertTrue(re.exec(e.stack) !== null);
}
return v;
};
var o = [1,2,3];
b.map(callback);
}
lazyDeopt();
lazyDeopt();
%OptimizeFunctionOnNextCall(lazyDeopt);
lazyDeopt();
})();
(function() {
var re = /Array\.map/;
var a = [1,2,3];
var result = 0;
var lazyDeopt = function() {
var callback = function(v,i,o) {
result += i;
if (i == 1) {
%DeoptimizeFunction(lazyDeopt);
throw new Error();
}
return v;
};
a.map(callback);
}
assertThrows(() => lazyDeopt());
assertThrows(() => lazyDeopt());
try {
lazyDeopt();
} catch (e) {
assertTrue(re.exec(e.stack) !== null);
}
%OptimizeFunctionOnNextCall(lazyDeopt);
try {
lazyDeopt();
} catch (e) {
assertTrue(re.exec(e.stack) !== null);
}
})();
// Verify that we remain in optimized code despite transitions in the output
// array.
(function() {
var result = 0;
var to_double = function() {
var callback = function(v,i,o) {
result += v;
if (i < 5) {
// First transition the output array to PACKED_DOUBLE_ELEMENTS.
return v + 0.5;
} else {
// Then return smi values and make sure they can live in the double
// array.
return v;
}
}
return c.map(callback);
}
to_double();
to_double();
%OptimizeFunctionOnNextCall(to_double);
var output = to_double();
assertTrue(%HasDoubleElements(output));
assertEquals(1.5, output[0]);
assertEquals(6, output[5]);
assertEquals(975, result);
assertOptimized(to_double);
})();
(function() {
var result = 0;
var to_fast = function() {
var callback = function(v,i,o) {
result += v;
if (i < 5) {
// First transition the output array to PACKED_DOUBLE_ELEMENTS.
return v + 0.5;
} else if (i < 10) {
// Then return smi values and make sure they can live in the double
// array.
return v;
} else {
// Later, to PACKED_ELEMENTS.
return v + 'hello';
}
}
return c.map(callback);
}
to_fast();
to_fast();
%OptimizeFunctionOnNextCall(to_fast);
var output = to_fast();
%HasObjectElements(output);
assertEquals(975, result);
assertEquals("11hello", output[10]);
assertOptimized(to_fast);
})();
// TurboFan specializes on number results, ensure the code path is
// tested.
(function() {
var a = [1, 2, 3];
function double_results() {
// TurboFan recognizes the result is a double.
var callback = v => v + 0.5;
return a.map(callback);
}
double_results();
double_results();
%OptimizeFunctionOnNextCall(double_results);
double_results();
assertEquals(1.5, double_results()[0]);
})();
// TurboFan specializes on non-number results, ensure the code path is
// tested.
(function() {
var a = [1, 2, 3];
function string_results() {
// TurboFan recognizes the result is a string.
var callback = v => "hello" + v.toString();
return a.map(callback);
}
string_results();
string_results();
%OptimizeFunctionOnNextCall(string_results);
string_results();
assertEquals("hello1", string_results()[0]);
})();
// Verify holes are not visited.
(() => {
const a = [1, 2, , 3, 4];
let callback_values = [];
function withHoles() {
callback_values = [];
return a.map(v => {
callback_values.push(v);
return v;
});
}
withHoles();
withHoles();
%OptimizeFunctionOnNextCall(withHoles);
assertArrayEquals([1, 2, , 3, 4], withHoles());
assertArrayEquals([1, 2, 3, 4], callback_values);
})();
(() => {
const a = [1.5, 2.5, , 3.5, 4.5];
let callback_values = [];
function withHoles() {
callback_values = [];
return a.map(v => {
callback_values.push(v);
return v;
});
}
withHoles();
withHoles();
%OptimizeFunctionOnNextCall(withHoles);
assertArrayEquals([1.5, 2.5, , 3.5, 4.5], withHoles());
assertArrayEquals([1.5, 2.5, 3.5, 4.5], callback_values);
})();
// Ensure that we handle side-effects between load and call.
(() => {
function side_effect(a, b) { if (b) a.foo = 3; return a; }
%NeverOptimizeFunction(side_effect);
function unreliable(a, b) {
return a.map(x => x * 2, side_effect(a, b));
}
let a = [1, 2, 3];
unreliable(a, false);
unreliable(a, false);
%OptimizeFunctionOnNextCall(unreliable);
unreliable(a, false);
// Now actually do change the map.
unreliable(a, true);
})();
// Messing with the Array species constructor causes deoptimization.
(function() {
var result = 0;
var a = [1,2,3];
var species_breakage = function() {
var callback = function(v,i,o) {
result += v;
return v;
}
a.map(callback);
}
species_breakage();
species_breakage();
%OptimizeFunctionOnNextCall(species_breakage);
species_breakage();
a.constructor = {};
a.constructor[Symbol.species] = function() {};
species_breakage();
assertUnoptimized(species_breakage);
assertEquals(24, result);
})();
/////////////////////////////////////////////////////////////////////////
//
// Any tests added below species_breakage won't test optimized map calls
// because the array species constructor change disables inlining of
// Array.prototype.map across the isolate.
//
/////////////////////////////////////////////////////////////////////////