67c951fa12
This is a reland of commit c4301c0489:
- Fix thin string in string-compare.js with low gc interval
Original change:
- Rename TryBuildCompareOperationBranch to TryBuildCompareOperation
- Add CheckedInternalizedString conversion Node that checks for string
inputs and extracts internalised Strings from ThinStrings
- Add BranchIfReferenceCompare Node
- Add runtime functions to create internalised and thin Strings
- Add deopt check to test/mjsunit/maglev/int32-branch.js
Bug: v8:7700
Change-Id: I9221253f6bbeef12297419495c6eaf5096e06278
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3755152
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81680}
43 lines
998 B
JavaScript
43 lines
998 B
JavaScript
// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --maglev --no-stress-opt --no-always-turbofan
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function foo(x,y) {
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if (x < y) {
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return 42;
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}
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return 24;
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}
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%PrepareFunctionForOptimization(foo);
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assertEquals(42, foo(1,2));
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assertEquals(24, foo(6,2));
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%OptimizeMaglevOnNextCall(foo);
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assertEquals(42, foo(1,2));
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assertEquals(24, foo(6,2));
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assertTrue(isMaglevved(foo));
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assertEquals(42, foo(1.1, 2.2));
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assertEquals(24, foo(6.6, 2.2));
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assertUnoptimized(foo);
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function bar(x,y) {
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if (!(x >= y)) {
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return 42;
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}
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return 24;
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}
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%PrepareFunctionForOptimization(bar);
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assertEquals(42, bar(1,2));
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assertEquals(24, bar(6,2));
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%OptimizeMaglevOnNextCall(bar);
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assertEquals(42, bar(1,2));
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assertEquals(24, bar(6,2));
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assertTrue(isMaglevved(bar));
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assertEquals(42, bar(1.1, 2.2));
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assertEquals(24, bar(6.6, 2.2));
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assertUnoptimized(bar);
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