[clang] [AArch64] Warn when calling a NEON builtin in a streaming function (PR #73672)

[Sam Tebbs via cfe-commits]

================
@@ -2993,6 +2993,47 @@ static QualType getNeonEltType(NeonTypeFlags Flags, 
ASTContext &Context,
   llvm_unreachable("Invalid NeonTypeFlag!");
 }
 
+enum ArmStreamingType {
+  ArmNonStreaming,
+  ArmStreaming,
+  ArmStreamingCompatible,
+  ArmLocallyStreaming
+};
+
+static ArmStreamingType getArmStreamingFnType(const FunctionDecl *FD) {
+  if (FD->hasAttr<ArmLocallyStreamingAttr>())
+    return ArmLocallyStreaming;
----------------
SamTebbs33 wrote:

Thanks Sander, that makes sense to me.

https://github.com/llvm/llvm-project/pull/73672
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