Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/v8/v8/+/513a5bdd040815422ce74536f3415701af8a0ec4 ([turbofan] Fix Word32 (Signed32OrMinusZero) conversions that identify zeros.).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

Doesn't seem to related to NumberModules (interestingly). Simplified test case:

```js
// Flags: --allow-natives-syntax

function foo(x) {
  return (x >>> 2147483648) + -6;
}

assertEquals(-6, foo(0));
assertEquals(-6, foo(0));
%OptimizeFunctionOnNextCall(foo);
assertEquals(4294967283, foo(-7));
```

 Issue 899555  has been merged into this issue.

This requires some expertise from jarin@, seems to be flushing out some issue in how we have the SpeculativeSafeIntegerAdd, since we incorrectly eliminate the overflow check on that one (generating just a `subl rax,6` here). Let's look into this together when you're back.

 Issue 899749  has been merged into this issue.

ClusterFuzz testcase 5135891809697792 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

ClusterFuzz has detected this issue as fixed in range 57284:57285.

Detailed report: https://clusterfuzz.com/testcase?key=6223593619587072

Fuzzer: foozzie_js_mutation
Job Type: v8_foozzie
Platform Id: linux

Crash Type: V8 correctness failure
Crash Address: 
Crash State:
  configs: x64,ignition:x64,slow_path
  sources: 265
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=v8_foozzie&range=56368:56369
Fixed: https://clusterfuzz.com/revisions?job=v8_foozzie&range=57284:57285

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6223593619587072

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.