[llvm] [AArch64][SME] Allow memory operations lowering to custom SME functions. (PR #79263)

[Sander de Smalen via llvm-commits]

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@@ -51,6 +51,9 @@ SMEAttrs::SMEAttrs(StringRef FuncName) : Bitmask(0) {
   if (FuncName == "__arm_tpidr2_restore")
     Bitmask |= (SMEAttrs::SM_Compatible | SMEAttrs::ZA_Shared |
                 SMEAttrs::SME_ABI_Routine);
+  if (FuncName == "__arm_sc_memcpy" || FuncName == "__arm_sc_memset" ||
+      FuncName == "__arm_sc_memmove")
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sdesmalen-arm wrote:

`__arm_sc_memchr` is also streaming-compatible.

https://github.com/llvm/llvm-project/pull/79263