[llvm-branch-commits] [clang] release/19.x: [clang][AArch64] Add SME2.1 feature macros (#105657) (PR #106135)

[Sander de Smalen via llvm-branch-commits]

sdesmalen-arm wrote:

Rationale; this helps people who use LLVM 19 to write code for the SME2.1 intrinsics, which the compiler already supports, but without the macros set a user couldn't write compliant code, e.g. `#if defined __ARM_FEATURE_SME_B16B16, <code>, #endif`, because the macro would not be set.

https://github.com/llvm/llvm-project/pull/106135