[release/9.0-rc1] JIT: update simd base type when combining simd nodes for bitwise ops

[github-actions]

Backport of #106510 to release/9.0-rc1

/cc @AndyAyersMS

Customer Impact

• Customer reported
• Found internally

Found by Antigen (internal exploratory test generator).

Certain patterns of Vector512 usage will lead to unexpected failures like

Process terminated. InternalError
   at System.Environment.FailFast(System.Runtime.CompilerServices.StackCrawlMarkHandle, System.String, System.Runtime.CompilerServices.ObjectHandleOnStack, System.String)
   at System.Environment.FailFast(System.Threading.StackCrawlMark ByRef, System.String, System.Exception, System.String)
   at System.Environment.FailFast(System.String)
   at System.Runtime.EH.FallbackFailFast(System.Runtime.RhFailFastReason, System.Object)
   at System.Runtime.EH.RhThrowHwEx(UInt32, ExInfo ByRef)

Regression

• Yes
• No

Looks like this was introduced recently, by #104517.

Testing

While we generally have good coverage for HW intrinsics used in isolation, the combinatorics for HW intrinsics are unfavorable (thousands of intrinsics --> millions of pairs, billions of triples, etc). Antigen and similar tools attempt to explore the space of composition to a certain degree.

The fix was validated on the Antigen test case, and that case is now included in our regression suite.

Risk

Low. Only impacts a specific pattern of intrinsics when running on AVX-512 capable hardware.

IMPORTANT: If this backport is for a servicing release, please verify that:

• The PR target branch is release/X.0-staging, not release/X.0.

• If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.

[dotnet-policy-service]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

[AndyAyersMS]

@tannergooding PTAL
cc @dotnet/jit-contrib

FYI @jeffschwMSFT

[AndyAyersMS]

Failure looks like #106494, not sure why build analysis isn't picking this up. (guess it is, and it's red waiting for servicing-approved? this is a little confusing)

[jeffschwMSFT]

lgtm. we will take for consideration in rc1

[carlossanlop]

Approved by Tactics via email.