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[turbofan] Teach escape analysis about ObjectIsNaN.

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BUG=chromium:698607
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2735633003
Cr-Commit-Position: refs/heads/master@{#43612}
This commit is contained in:
bmeurer 2017-03-06 04:55:28 -08:00 committed by Commit bot
parent fe704477d6
commit 1e4a2725b8
2 changed files with 23 additions and 0 deletions
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1
src/compiler/escape-analysis.cc
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@ -840,6 +840,7 @@ bool EscapeStatusAnalysis::CheckUsesForEscape(Node* uses, Node* rep,
case IrOpcode::kStringCharCodeAt:
case IrOpcode::kStringIndexOf:
case IrOpcode::kObjectIsDetectableCallable:
case IrOpcode::kObjectIsNaN:
case IrOpcode::kObjectIsNonCallable:
case IrOpcode::kObjectIsNumber:
case IrOpcode::kObjectIsReceiver:

22
test/mjsunit/regress/regress-crbug-698607.js Normal file
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@ -0,0 +1,22 @@
// 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
function assertSame(expected, found) {
if (found === expected) {
} else if ((expected !== expected) && (found !== found)) {
}
}
function foo() {
var x = {var: 0.5};
assertSame(x, x.val);
return () => x;
}
foo(1);
foo(1);
%OptimizeFunctionOnNextCall(foo);
foo(1);