[llvm] -fsanitize=function: fix .subsections_via_symbols (PR #87527)

[Fangrui Song via llvm-commits]

================
@@ -868,6 +868,9 @@ class AsmPrinter : public MachineFunctionPass {
   /// This method emits a comment next to header for the current function.
   virtual void emitFunctionHeaderComment();
 
+  /// This method emits prefix-like data before the current function.
+  void emitFunctionPrefix(const SmallVector<const Constant *, 1> &Prefix);
----------------
MaskRay wrote:

Use ArrayRef like https://github.com/MaskRay/llvm-project/tree/pr87527-edit

https://github.com/llvm/llvm-project/pull/87527