[clang] [Clang][AArch64] Change SME attributes for shared/new/preserved state. (PR #76971)

[via cfe-commits]

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@@ -66,7 +66,7 @@ void test_svzero_mask_za_2(void) __arm_shared_za {
 // CHECK-CXX-NEXT:    tail call void @llvm.aarch64.sme.zero(i32 255)
 // CHECK-CXX-NEXT:    ret void
 //
-void test_svzero_za(void) __arm_shared_za {
+void test_svzero_za(void) __arm_inout("za") {
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rsandifo-arm wrote:

FWIW, this one could be `__arm_out("za")`.

https://github.com/llvm/llvm-project/pull/76971