[clang] [AArch64][SME2] Add PEXT, PSEL builtins for SME2 (PR #72827)

[Matthew Devereau via cfe-commits]

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@@ -1,10 +1,17 @@
 // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
 // REQUIRES: aarch64-registered-target
-// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve2p1 -S -O1 -Werror -emit-llvm -o - %s | FileCheck %s
-// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve2p1 -S -O1 -Werror -emit-llvm -o - -x c++ %s | FileCheck %s -check-prefix=CPP-CHECK
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +sme -target-feature +sme2 -S -O1 -Werror -emit-llvm -o - %s | FileCheck %s
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MDevereau wrote:

```suggestion
// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +sme2 -S -O1 -Werror -emit-llvm -o - %s | FileCheck %s
```
I don't think we need `-target-feature +sme` in this file?

https://github.com/llvm/llvm-project/pull/72827