c6a16c10dd
With bytecode flushing and lazy feedback allocation, we need to call %PrepareForOptimization before we call %OptimizeFunctionOnNextCall, ideally after declaring the function. Bug: v8:8801, v8:8394, v8:9183 Change-Id: I3fb257282a30f6526a376a3afdedb44786320d34 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1648255 Commit-Queue: Mathias Bynens <mathias@chromium.org> Reviewed-by: Maya Lekova <mslekova@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Cr-Commit-Position: refs/heads/master@{#62119}
71 lines
2.4 KiB
JavaScript
71 lines
2.4 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
|
|
|
|
var p = {
|
|
f: function() {
|
|
return 'p';
|
|
}
|
|
};
|
|
var o = Object.create(p);
|
|
o.x = true;
|
|
delete o.x; // slow case object
|
|
|
|
var u = {
|
|
x: 0,
|
|
f: function() {
|
|
return 'u';
|
|
}
|
|
}; // object with some other map
|
|
|
|
function F(x) {
|
|
return x.f();
|
|
}
|
|
|
|
// First make CALL IC in F go MEGAMORPHIC and ensure that we put the stub
|
|
// that calls p.f (guarded by a negative dictionary lookup on the receiver)
|
|
// into the stub cache
|
|
;
|
|
%PrepareFunctionForOptimization(F);
|
|
assertEquals('p', F(o));
|
|
assertEquals('p', F(o));
|
|
assertEquals("u", F(u));
|
|
assertEquals("p", F(o));
|
|
assertEquals("u", F(u));
|
|
|
|
// Optimize F. We will inline p.f into F guarded by map checked against
|
|
// receiver which does not work for slow case objects.
|
|
%OptimizeFunctionOnNextCall(F);
|
|
assertEquals("p", F(o));
|
|
|
|
// Add f to o. o's map will *not* change.
|
|
o.f = function() {
|
|
return 'o';
|
|
};
|
|
assertEquals("o", F(o));
|