Stephen Canon 85b304220f [6.2] Implement Builtin.select binding llvm select instruction (#81665) ...

Not used (yet), but needed to implement SIMD.replacing(with:where:)
idiomatically, and probably useful otherwise.

**Explanation:** Makes select available in Swift's builtin module, which
allows implementing concrete SIMD operations more efficiently.
**Risk:** Low. New builtin protected by a feature flag, currently
unused.
**Testing:** New tests added.
**Reviewers:** @eeckstein, @Azoy 
**Main branch PR:** https://github.com/swiftlang/swift/pull/81598

2025-05-21 19:14:33 -04:00

133 KiB

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