[Webkit-unassigned] [Bug 232866] New: Compiler Incorrect Optimization

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232866

            Bug ID: 232866
           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
-NaN
-NaN

actual output
-NaN
NaN


bug.js
##################################
function f() {
    const v1 = Math.ceil({});
    const v2 = -v1;
    const v3 = v2.toLocaleString();
    return v3;
}
let a0 = f();
print(a0);

for (let i = 0; i < 0x1000; i++) { f(); }
let a3 = f();
print(a3);

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