[clang] [Clang][AArch64] Add fix vector types to header into SVE (PR #73258)

[Sander de Smalen via cfe-commits]

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@@ -2546,6 +2548,44 @@ void NeonEmitter::runFP16(raw_ostream &OS) {
   OS << "#endif /* __ARM_FP16_H */\n";
 }
 
+void NeonEmitter::runVectorType(raw_ostream &OS) {
+  OS << "/*===---- arm_vector_type - ARM vector type "
+        "------===\n"
+        " *\n"
+        " *\n"
+        " * Part of the LLVM Project, under the Apache License v2.0 with LLVM "
+        "Exceptions.\n"
+        " * See https://llvm.org/LICENSE.txt for license information.\n"
+        " * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception\n"
+        " *\n"
+        " *===-----------------------------------------------------------------"
+        "------===\n"
+        " */\n\n";
+  OS << "#ifndef __ARM_NEON_TYPES_H\n";
+  OS << "#define __ARM_NEON_TYPES_H\n";
+  OS << "#ifdef __cplusplus\n";
+  OS << "extern \"C\" {\n";
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sdesmalen-arm wrote:

Is `extern "C"` required? My understanding is that only affects the mangling of function names, of which there are non in the generated header file.

https://github.com/llvm/llvm-project/pull/73258