[clang] [Clang][SME2] Add outer product and accumulate/subtract builtins (PR #71176)

[Matthew Devereau via cfe-commits]

================
@@ -298,3 +298,19 @@ multiclass ZAAddSub<string n_suffix> {
 
 defm SVADD : ZAAddSub<"add">;
 defm SVSUB : ZAAddSub<"sub">;
+
+//
+// Outer produce and accumulate/subtract
+//
+
+let TargetGuard = "sme2" in {
+  def SVSMOPA  : Inst<"svmopa_za32[_{d}]_m", "viPPdd", "s", MergeNone, "aarch64_sme_smopa_za32", [IsSharedZA, IsStreaming], [ImmCheck<0, ImmCheck0_3>]>;
+  def SVUSMOPA : Inst<"svmopa_za32[_{d}]_m", "viPPdd", "Us", MergeNone, "aarch64_sme_umopa_za32", [IsSharedZA, IsStreaming], [ImmCheck<0, ImmCheck0_3>]>;
+
+  def SVSMOPS  : Inst<"svmops_za32[_{d}]_m", "viPPdd", "s", MergeNone, "aarch64_sme_smops_za32", [IsSharedZA, IsStreaming], [ImmCheck<0, ImmCheck0_3>]>;
+  def SVUSMOPS : Inst<"svmops_za32[_{d}]_m", "viPPdd", "Us", MergeNone, "aarch64_sme_umops_za32", [IsSharedZA, IsStreaming], [ImmCheck<0, ImmCheck0_3>]>;
+
----------------
MDevereau wrote:

```suggestion
//
//  Bitwise exclusive NOR population count outer product and accumulate/subtract
//
```

https://github.com/llvm/llvm-project/pull/71176