Bug 275939 – Negative exponent exception for BigInt not thrown in JIT compiler

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[GuY]

The following script should output 10 lines of same result.
```
function opt() {
    try {
        1n ** -1n;
    } catch (e) {
        return e
    }
    return 0;
}
for (let i = 0; i < 10; i++) {
    print(opt())
}
```

Actual output:
```
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
0
0
0
```

run args:
cmake-build-debug/bin/jsc --useConcurrentJIT=0 --jitPolicyScale=0.00005 ./test.js

commit id:
47fe298829ac629f561518641b7e6bc4069cb09b

[Alexey Proskuryakov]

I can reproduce this on macOS 14.6 beta.

[GuY]

The same problem happens on div operator.

```
function opt() {
    try {
        0n / 0n
    } catch (e) {
        return e
    }
    return 0;
}
for (let i = 0; i < 10; i++) {
    print(opt())
}
```

Actual output:
```
RangeError: 0 is an invalid divisor value.
RangeError: 0 is an invalid divisor value.
RangeError: 0 is an invalid divisor value.
RangeError: 0 is an invalid divisor value.
RangeError: 0 is an invalid divisor value.
RangeError: 0 is an invalid divisor value.
RangeError: 0 is an invalid divisor value.
0
0
0
```

seems that some `Node` that have side effect were removed, because no one was using them.

[Radar WebKit Bug Importer]

<rdar://problem/131051084>

[Yijia Huang]

Pull request: https://github.com/WebKit/WebKit/pull/30620

[Yijia Huang]

*** Bug 276435 has been marked as a duplicate of this bug. ***

[EWS]

Committed 280841@main (02429197cd90): <https://commits.webkit.org/280841@main>

Reviewed commits have been landed. Closing PR #30620 and removing active labels.