52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
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// Copyright 2024 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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//
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// Flags: --allow-natives-syntax
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// Consider dead branches.
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(function() {
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function bar(x) { o.x; }
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function foo(x) {
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// We create a diamond shape with 2 calls to bar. One normal for
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// null/undefineds x's and one with CallWithArryLike. The first one
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// will be inlined and its compilation will abort due to lack of
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// feedback in the accessor.
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try { bar.apply(this, x); } catch {}
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}
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%PrepareFunctionForOptimization(foo);
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foo();
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foo();
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%OptimizeFunctionOnNextCall(foo);
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foo();
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})();
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// Consider untagged values passed to CallWithArray.
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(function() {
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function bar() {}
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function foo(x) {
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x++; // We guarantee that the x is a Float64 node.
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try { bar.apply(this, x); } catch {}
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}
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%PrepareFunctionForOptimization(foo);
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foo();
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foo();
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%OptimizeFunctionOnNextCall(foo);
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foo();
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})();
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// Consider untagged values passed to the branch node.
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(function() {
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let a = [4.2, /*hole*/, 4.2];
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function bar() {}
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function foo(i) {
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let x = a[i];
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try { bar.apply(this, x); } catch {}
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}
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%PrepareFunctionForOptimization(foo);
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foo(a[1]);
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foo(a[1]);
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%OptimizeFunctionOnNextCall(foo);
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foo(a[1]);
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})();
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