Bug 277895 – [JSC] Atomics.and returns incorrect number type in JIT compiler

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

[GuY]

```
function opt() {
  const arr = new Int16Array([-1]);
  print(this.Atomics.and(arr, 0,0));
}

for(let i=0;i<10;i++)
    opt();
```

actual output:
-1
-1
-1
-1
-1
-1
-1
65535
65535
65535

expected behavior:
an Int16 number should be returned, 65535 is out of range.

run args:
cmake-build-debug/bin/jsc test.js --useConcurrentJIT=0 --jitPolicyScale=0.001

tested on the latest webkit git main branch:
08eaf750b8abe612c38d277d82d2eae71288acd2

The tested platform is x86_64 fedora linux system.

[Radar WebKit Bug Importer]

<rdar://problem/134115829>

[Keith Miller]

Pull request: https://github.com/WebKit/WebKit/pull/32404

[EWS]

Committed 282476@main (67c8ea6bd1f0): <https://commits.webkit.org/282476@main>

Reviewed commits have been landed. Closing PR #32404 and removing active labels.