[clang] [Clang][AArch64] Warn when calling streaming/non-streaming about vect… (PR #79842)

[Sander de Smalen via cfe-commits]

================
@@ -7513,6 +7516,41 @@ void Sema::checkCall(NamedDecl *FDecl, const 
FunctionProtoType *Proto,
       }
     }
 
+    auto *CallerFD = dyn_cast<FunctionDecl>(CurContext);
+    bool IsCalleeStreaming = ((ExtInfo.AArch64SMEAttributes &
+                               FunctionType::SME_PStateSMEnabledMask) ||
+                              (ExtInfo.AArch64SMEAttributes &
+                               FunctionType::SME_PStateSMCompatibleMask));
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sdesmalen-arm wrote:

Streaming-compatible and streaming are not the same thing. i.e. if the callee 
is 'streaming-compatible', `IsCalleeStreaming` should be `false`.

https://github.com/llvm/llvm-project/pull/79842
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