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deps: V8: cherry-pick 52a9e67
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Original commit message:

    [turbofan] Fix ObjectCreate's side effect annotation.

    Bug: chromium:888923
    Change-Id: Ifb22cd9b34f53de3cf6e47cd92f3c0abeb10ac79
    Reviewed-on: https://chromium-review.googlesource.com/1245763
    Reviewed-by: Benedikt Meurer <[email protected]>
    Commit-Queue: Jaroslav Sevcik <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#56236}

Refs: v8/v8@52a9e67

PR-URL: #25027
Refs: v8/v8@52a9e67
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Myles Borins <[email protected]>
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ofrobots authored and MylesBorins committed Dec 26, 2018
1 parent 4209e12 commit 17b55bf
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Showing 3 changed files with 33 additions and 2 deletions.
2 changes: 1 addition & 1 deletion common.gypi
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Expand Up @@ -33,7 +33,7 @@

# Reset this number to 0 on major V8 upgrades.
# Increment by one for each non-official patch applied to deps/v8.
'v8_embedder_string': '-node.45',
'v8_embedder_string': '-node.46',

# Enable disassembler for `--print-code` v8 options
'v8_enable_disassembler': 1,
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2 changes: 1 addition & 1 deletion deps/v8/src/compiler/js-operator.cc
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Expand Up @@ -598,7 +598,7 @@ CompareOperationHint CompareOperationHintOf(const Operator* op) {
V(CreateKeyValueArray, Operator::kEliminatable, 2, 1) \
V(CreatePromise, Operator::kEliminatable, 0, 1) \
V(CreateTypedArray, Operator::kNoProperties, 5, 1) \
V(CreateObject, Operator::kNoWrite, 1, 1) \
V(CreateObject, Operator::kNoProperties, 1, 1) \
V(ObjectIsArray, Operator::kNoProperties, 1, 1) \
V(HasProperty, Operator::kNoProperties, 2, 1) \
V(HasInPrototypeChain, Operator::kNoProperties, 2, 1) \
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31 changes: 31 additions & 0 deletions deps/v8/test/mjsunit/compiler/regress-888923.js
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@@ -0,0 +1,31 @@
// Copyright 2018 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() {
function f(o) {
o.x;
Object.create(o);
return o.y.a;
}

f({ x : 0, y : { a : 1 } });
f({ x : 0, y : { a : 2 } });
%OptimizeFunctionOnNextCall(f);
assertEquals(3, f({ x : 0, y : { a : 3 } }));
})();

(function() {
function f(o) {
let a = o.y;
Object.create(o);
return o.x + a;
}

f({ x : 42, y : 21 });
f({ x : 42, y : 21 });
%OptimizeFunctionOnNextCall(f);
assertEquals(63, f({ x : 42, y : 21 }));
})();

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