v8/test/mjsunit/compiler/escape-analysis.js

176 lines
4.9 KiB
JavaScript

// Copyright 2013 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 --use-escape-analysis
// Test stores on a join path.
(function testJoin() {
function constructor() {
this.a = 0;
}
function join(mode, expected) {
var object = new constructor();
if (mode) {
object.a = 1;
} else {
object.a = 2;
}
assertEquals(expected, object.a);
}
join(true, 1); join(true, 1);
join(false, 2); join(false, 2);
%OptimizeFunctionOnNextCall(join);
join(true, 1); join(false, 2);
})();
// Test loads and stores inside a loop.
(function testLoop() {
function constructor() {
this.a = 0;
this.b = 23;
}
function loop() {
var object = new constructor();
for (var i = 1; i < 10; i++) {
object.a = object.a + i;
assertEquals(i*(i+1)/2, object.a);
assertEquals(23, object.b);
}
assertEquals(45, object.a);
assertEquals(23, object.b);
}
loop(); loop();
%OptimizeFunctionOnNextCall(loop);
loop(); loop();
})();
// Test loads and stores inside nested loop.
(function testNested() {
function constructor() {
this.a = 0;
this.b = 0;
this.c = 23;
}
function nested() {
var object = new constructor();
for (var i = 1; i < 10; i++) {
object.a = object.a + i;
assertEquals(i*(i+1)/2, object.a);
assertEquals((i-1)*6, object.b);
assertEquals(23, object.c);
for (var j = 1; j < 4; j++) {
object.b = object.b + j;
assertEquals(i*(i+1)/2, object.a);
assertEquals((i-1)*6+j*(j+1)/2, object.b);
assertEquals(23, object.c);
}
assertEquals(i*(i+1)/2, object.a);
assertEquals(i*6, object.b);
assertEquals(23, object.c);
}
assertEquals(45, object.a);
assertEquals(54, object.b);
assertEquals(23, object.c);
}
nested(); nested();
%OptimizeFunctionOnNextCall(nested);
nested(); nested();
})();
// Test deoptimization with captured objects in local variables.
(function testDeoptLocal() {
var deopt = { deopt:false };
function constructor1() {
this.a = 1.0;
this.b = 2.3;
this.c = 3.0;
}
function constructor2(o) {
this.d = o;
this.e = 4.5;
}
function func() {
var o1 = new constructor1();
var o2 = new constructor2(o1);
deopt.deopt;
assertEquals(1.0, o1.a);
assertEquals(2.3, o2.d.b);
assertEquals(3.0, o2.d.c);
assertEquals(4.5, o2.e);
}
func(); func();
%OptimizeFunctionOnNextCall(func);
func(); func();
delete deopt.deopt;
func(); func();
})();
// Test deoptimization with captured objects on operand stack.
(function testDeoptOperand() {
var deopt = { deopt:false };
function constructor1() {
this.a = 1.0;
this.b = 2.3;
deopt.deopt;
assertEquals(1.0, this.a);
assertEquals(2.3, this.b);
this.b = 2.7;
this.c = 3.0;
this.d = 4.5;
}
function constructor2() {
this.e = 5.0;
this.f = new constructor1();
assertEquals(1.0, this.f.a);
assertEquals(2.7, this.f.b);
assertEquals(3.0, this.f.c);
assertEquals(4.5, this.f.d);
assertEquals(5.0, this.e);
this.e = 5.9;
this.g = 6.7;
}
function func() {
var o = new constructor2();
assertEquals(1.0, o.f.a);
assertEquals(2.7, o.f.b);
assertEquals(3.0, o.f.c);
assertEquals(4.5, o.f.d);
assertEquals(5.9, o.e);
assertEquals(6.7, o.g);
}
func(); func();
%OptimizeFunctionOnNextCall(func);
func(); func();
delete deopt.deopt;
func(); func();
})();