[llvm] [AArch64] SME implementation for agnostic-ZA functions (PR #120150)

[Paul Walker via llvm-commits]

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@@ -261,7 +261,13 @@ bool AArch64TTIImpl::areInlineCompatible(const Function *Caller,
 
   if (CallerAttrs.requiresLazySave(CalleeAttrs) ||
       CallerAttrs.requiresSMChange(CalleeAttrs) ||
-      CallerAttrs.requiresPreservingZT0(CalleeAttrs)) {
+      CallerAttrs.requiresPreservingZT0(CalleeAttrs) ||
+      CallerAttrs.requiresPreservingAllZAState(CalleeAttrs)) {
+    if (hasPossibleIncompatibleOps(Callee))
+      return false;
+  }
+
+  if (CalleeAttrs.hasAgnosticZAInterface()) {
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paulwalker-arm wrote:

Are there tests to cover these changes?

https://github.com/llvm/llvm-project/pull/120150