[clang] [AArch64][SME] Warn when using a streaming builtin from a non-streaming function (PR #74064)

[Sander de Smalen via cfe-commits]

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@@ -1375,6 +1381,12 @@ void SVEEmitter::createHeader(raw_ostream &OS) {
   OS << "#define __aio static __inline__ __attribute__((__always_inline__, "
         "__nodebug__, __overloadable__))\n\n";
 
+  OS << "#ifdef __ARM_FEATURE_SME\n";
+  OS << "#define __asc __attribute__((arm_streaming_compatible))\n";
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sdesmalen-arm wrote:

A few things:
* The `__attribute__((arm_streaming_compatible))` syntax is not supported.
* `__asc` is not used/emitted anywhere
* I'm not sure adding the attribute to the function prototype in the header file adds much value anyway. Better to just omit it.


https://github.com/llvm/llvm-project/pull/74064