[llvm] [AArch64][SME2] Preserve ZT0 state around function calls (PR #76968)

[Kerry McLaughlin via llvm-commits]

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@@ -60,6 +67,12 @@ SMEAttrs::SMEAttrs(const AttributeList &Attrs) {
     Bitmask |= ZA_New;
   if (Attrs.hasFnAttr("aarch64_pstate_za_preserved"))
     Bitmask |= ZA_Preserved;
+  if (Attrs.hasFnAttr("aarch64_sme_pstate_zt0_shared"))
+    Bitmask |= ZT_Shared;
+  if (Attrs.hasFnAttr("aarch64_sme_pstate_zt0_new"))
+    Bitmask |= ZT_New;
+  if (Attrs.hasFnAttr("aarch64_sme_pstate_zt0_preserved"))
+    Bitmask |= ZT_Preserved;
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kmclaughlin-arm wrote:

The attribute names have been updated in https://github.com/llvm/llvm-project/pull/77607

https://github.com/llvm/llvm-project/pull/76968