[Webkit-unassigned] [Bug 232869] New: Compiler Incorrect Optimization
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Nov 9 01:55:17 PST 2021
https://bugs.webkit.org/show_bug.cgi?id=232869
Bug ID: 232869
Summary: Compiler Incorrect Optimization
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: vulbugs at gmail.com
OS: ubuntu20.04
Architecture: <x64>
./jsc bug.js
expected output
3
3
actual output
3
-1
bug.js
##################################
function f() {
let v0 = 2147483648;
const v1 = v0--;
const v2 = new Float32Array([111,222,333,v1]);
const v3 = v2.indexOf(v0);
return v3;
}
let a0 = f();
print(a0);
for (let i = 0; i < 0x1000; i++) { f(); }
let a3 = f();
print(a3);
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