v8/test/mjsunit/smi-mul-const.js
Camillo Bruni e3e8ea5d65 [flags] Rename --opt to --turbofan
To be consistent with the all the other tiers and avoid confusion, we
rename --opt to ---turbofan, and --always-opt to --always-turbofan.

Change-Id: Ie23dc8282b3fb4cf2fbf73b6c3d5264de5d09718
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3610431
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80336}
2022-05-03 12:10:30 +00:00

88 lines
3.4 KiB
JavaScript

// Copyright 2014 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 --turbofan --noalways-turbofan
function check(func, input, expected) {
%PrepareFunctionForOptimization(func);
func(-1);
func(-1);
%OptimizeFunctionOnNextCall(func);
assertEquals(expected, func(input));
assertOptimized(func);
}
function mul_by_neg_1(a) { return a * -1; }
function mul_by_0(a) { return a * 0; }
function mul_by_1(a) { return a * 1; }
function mul_by_2(a) { return a * 2; }
check(mul_by_neg_1, 2, -2);
check(mul_by_0, 2, 0);
check(mul_by_1, 2, 2);
check(mul_by_2, 2, 4);
function limit_range(a) {
// Limit the range of 'a' to enable no-overflow optimizations.
return Math.max(Math.min(a | 0, 10), -10);
}
%EnsureFeedbackVectorForFunction(limit_range);
function mul_by_neg_127(a) { return limit_range(a) * -127; }
function mul_by_neg_128(a) { return limit_range(a) * -128; }
function mul_by_neg_129(a) { return limit_range(a) * -129; }
function mul_by_1023(a) { return limit_range(a) * 1023; }
function mul_by_1024(a) { return limit_range(a) * 1024; }
function mul_by_1025(a) { return limit_range(a) * 1025; }
check(mul_by_neg_127, 2, -254);
check(mul_by_neg_128, 2, -256);
check(mul_by_neg_129, 2, -258);
check(mul_by_1023, 2, 2046);
check(mul_by_1024, 2, 2048);
check(mul_by_1025, 2, 2050);
// Deopt on minus zero.
assertEquals(-0, mul_by_neg_128(0));
assertUnoptimized(mul_by_neg_128);
assertEquals(-0, mul_by_2(-0));
assertUnoptimized(mul_by_2);
// Deopt on overflow.
// -2^30 is in Smi range on most configurations, +2^30 is not.
var two_30 = 1 << 30;
assertEquals(two_30, mul_by_neg_1(-two_30));
// For good measure, check that overflowing int32 range (or Smi range
// without pointer compression) works too.
var two_31 = two_30 * 2;
assertEquals(two_31, mul_by_neg_1(-two_31));
// One of the two situations deoptimized the code.
assertUnoptimized(mul_by_neg_1);