[llvm] [AArch64][SME2] Add ZT0 attributes to SMEAttrs (PR #77607)

[Sander de Smalen via llvm-commits]

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@@ -50,6 +54,22 @@ TEST(SMEAttributes, Constructors) {
                       ->getFunction("foo"))
                   .preservesZA());
 
+  ASSERT_TRUE(SA(*parseIR("declare void @foo() \"aarch64_sme_zt0_in\"")
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sdesmalen-arm wrote:

Should we change the names of the attributes from `aarch64_sme_zt0_in` to the `aarch64_sme_in_zt0` format as well?  (and similar below)

https://github.com/llvm/llvm-project/pull/77607