Use the existing set_visibility function.

compiler/rustc_codegen_llvm/src/declare.rs

@@ -42,7 +42,7 @@ fn declare_raw_fn<'ll>(
 
     llvm::SetFunctionCallConv(llfn, callconv);
     llvm::SetUnnamedAddress(llfn, unnamed);
-    llvm::SetVisibility(llfn, visibility);
+    llvm::set_visibility(llfn, visibility);
 
     let mut attrs = SmallVec::<[_; 4]>::new();
 

compiler/rustc_codegen_llvm/src/llvm/mod.rs

@@ -172,12 +172,6 @@ pub fn SetUnnamedAddress(global: &Value, unnamed: UnnamedAddr) {
     }
 }
 
-pub fn SetVisibility(global: &Value, visibility: Visibility) {
-    unsafe {
-        LLVMRustSetVisibility(global, visibility);
-    }
-}
-
 pub fn set_thread_local_mode(global: &Value, mode: ThreadLocalMode) {
     unsafe {
         LLVMSetThreadLocalMode(global, mode);