rustc_codegen_llvm: use threadlocal.address intrinsic to access TLS

compiler/rustc_codegen_llvm/src/context.rs

@@ -1198,6 +1198,7 @@ impl<'ll> CodegenCx<'ll, '_> {
         }
 
         ifn!("llvm.ptrmask", fn(ptr, t_isize) -> ptr);
+        ifn!("llvm.threadlocal.address", fn(ptr) -> ptr);
 
         None
     }