v8/test/mjsunit/generated-transition-stub.js

223 lines
6.6 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
%NeverOptimizeFunction(test);
function test() {
var iteration_count = 1;
function transition1(a, i, v) {
a[i] = v;
}
//
// Test PACKED SMI -> PACKED DOUBLE
//
var a1 = [0, 1, 2, 3, 4];
transition1(a1, 0, 2.5);
var a2 = [0, 1, 2, 3, 4];
transition1(a2, 0, 2.5);
assertFalse(%HasFastHoleyElements(a2));
%OptimizeFunctionOnNextCall(transition1);
var a3 = [0, 1, 2, 3, 4];
assertTrue(%HasFastSmiElements(a3));
transition1(a3, 0, 2.5);
assertFalse(%HasFastHoleyElements(a3));
assertEquals(4, a3[4]);
assertEquals(2.5, a3[0]);
// Test handling of hole.
var a4 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
a4.length = 7;
assertTrue(%HasFastSmiElements(a4));
transition1(a4, 0, 2.5);
assertFalse(%HasFastHoleyElements(a4));
assertEquals(2.5, a4[0]);
assertEquals(undefined, a4[8]);
// Large array should deopt to runtimea
for (j = 0; j < iteration_count; ++j) {
a5 = new Array();
for (i = 0; i < 0x40000; ++i) {
a5[i] = 0;
}
assertTrue(%HasFastSmiElements(a5) || %HasFastDoubleElements(a5));
transition1(a5, 0, 2.5);
assertEquals(2.5, a5[0]);
}
//
// Test HOLEY SMI -> HOLEY DOUBLE
//
function transition2(a, i, v) {
a[i] = v;
}
var b1 = [0, 1, 2, , 4];
transition2(b1, 0, 2.5);
var b2 = [0, 1, 2, , 4];
transition2(b2, 0, 2.5);
assertTrue(%HasFastHoleyElements(b2));
%OptimizeFunctionOnNextCall(transition2);
var b3 = [0, 1, 2, , 4];
assertTrue(%HasFastSmiElements(b3));
assertTrue(%HasFastHoleyElements(b3));
transition2(b3, 0, 2.5);
assertTrue(%HasFastHoleyElements(b3));
assertEquals(4, b3[4]);
assertEquals(2.5, b3[0]);
// Large array should deopt to runtime
for (j = 0; j < iteration_count; ++j) {
b4 = [0, ,0];
for (i = 3; i < 0x40000; ++i) {
b4[i] = 0;
}
assertTrue(%HasFastSmiElements(b4));
transition2(b4, 0, 2.5);
assertEquals(2.5, b4[0]);
}
//
// Test PACKED DOUBLE -> PACKED OBJECT
//
function transition3(a, i, v) {
a[i] = v;
}
var c1 = [0, 1, 2, 3.5, 4];
transition3(c1, 0, new Object());
var c2 = [0, 1, 2, 3.5, 4];
transition3(c2, 0, new Object());
assertTrue(%HasFastObjectElements(c2));
assertTrue(!%HasFastHoleyElements(c2));
%OptimizeFunctionOnNextCall(transition3);
var c3 = [0, 1, 2, 3.5, 4];
assertTrue(%HasFastDoubleElements(c3));
assertTrue(!%HasFastHoleyElements(c3));
transition3(c3, 0, new Array());
assertTrue(!%HasFastHoleyElements(c3));
assertTrue(%HasFastObjectElements(c3));
assertEquals(4, c3[4]);
assertEquals(0, c3[0].length);
// Large array under the deopt threshold should be able to trigger GC without
// causing crashes.
for (j = 0; j < iteration_count; ++j) {
c4 = [0, 2.5, 0];
for (i = 3; i < 0xa000; ++i) {
c4[i] = 0;
}
assertTrue(%HasFastDoubleElements(c4));
assertTrue(!%HasFastHoleyElements(c4));
transition3(c4, 0, new Array(5));
assertTrue(!%HasFastHoleyElements(c4));
assertTrue(%HasFastObjectElements(c4));
assertEquals(5, c4[0].length);
}
// Large array should deopt to runtime
for (j = 0; j < iteration_count; ++j) {
c5 = [0, 2.5, 0];
for (i = 3; i < 0x40000; ++i) {
c5[i] = 0;
}
assertTrue(%HasFastDoubleElements(c5));
assertTrue(!%HasFastHoleyElements(c5));
transition3(c5, 0, new Array(5));
assertTrue(!%HasFastHoleyElements(c5));
assertTrue(%HasFastObjectElements(c5));
assertEquals(5, c5[0].length);
}
//
// Test HOLEY DOUBLE -> HOLEY OBJECT
//
function transition4(a, i, v) {
a[i] = v;
}
var d1 = [0, 1, , 3.5, 4];
transition4(d1, 0, new Object());
var d2 = [0, 1, , 3.5, 4];
transition4(d2, 0, new Object());
assertTrue(%HasFastObjectElements(d2));
assertTrue(%HasFastHoleyElements(d2));
%OptimizeFunctionOnNextCall(transition4);
var d3 = [0, 1, , 3.5, 4];
assertTrue(%HasFastDoubleElements(d3));
assertTrue(%HasFastHoleyElements(d3));
transition4(d3, 0, new Array());
assertTrue(%HasFastHoleyElements(d3));
assertTrue(%HasFastObjectElements(d3));
assertEquals(4, d3[4]);
assertEquals(0, d3[0].length);
// Large array under the deopt threshold should be able to trigger GC without
// causing crashes.
for (j = 0; j < iteration_count; ++j) {
d4 = [, 2.5, ,];
for (i = 3; i < 0xa000; ++i) {
d4[i] = 0;
}
assertTrue(%HasFastDoubleElements(d4));
assertTrue(%HasFastHoleyElements(d4));
transition4(d4, 0, new Array(5));
assertTrue(%HasFastHoleyElements(d4));
assertTrue(%HasFastObjectElements(d4));
assertEquals(5, d4[0].length);
assertEquals(undefined, d4[2]);
}
// Large array should deopt to runtime
for (j = 0; j < iteration_count; ++j) {
d5 = [, 2.5, ,];
for (i = 3; i < 0x40000; ++i) {
d5[i] = 0;
}
assertTrue(%HasFastDoubleElements(d5));
assertTrue(%HasFastHoleyElements(d5));
transition4(d5, 0, new Array(5));
assertTrue(%HasFastHoleyElements(d5));
assertTrue(%HasFastObjectElements(d5));
assertEquals(5, d5[0].length);
assertEquals(undefined, d5[2]);
}
}
test();