[llvm] [CrossDSO CFI] Make sure __cfi_check has BTI attribute. (PR #131224)

[Daniel Kiss via llvm-commits]

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@@ -94,6 +94,14 @@ void CrossDSOCFI::buildCFICheck(Module &M) {
   Triple T(M.getTargetTriple());
   if (T.isARM() || T.isThumb())
     F->addFnAttr("target-features", "+thumb-mode");
+  if (T.isAArch64()) {
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DanielKristofKiss wrote:

`M.getOrInsertFunction` could be replaced with the `Function::createWithDefaultAttr` to create the functions with the right set of attributes. It is used in other places in the sanitisers to create functions. It will solve this and future problems.

https://github.com/llvm/llvm-project/pull/131224