Make predefine methods take &mut self

compiler/rustc_codegen_gcc/src/base.rs

@@ -220,7 +220,7 @@ pub fn compile_codegen_unit(
             let mono_items = cgu.items_in_deterministic_order(tcx);
             for &(mono_item, data) in &mono_items {
                 mono_item.predefine::<Builder<'_, '_, '_>>(
-                    &cx,
+                    &mut cx,
                     cgu_name.as_str(),
                     data.linkage,
                     data.visibility,

compiler/rustc_codegen_gcc/src/mono_item.rs

@@ -16,7 +16,7 @@ use crate::{attributes, base};
 impl<'gcc, 'tcx> PreDefineCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
     #[cfg_attr(not(feature = "master"), allow(unused_variables))]
     fn predefine_static(
-        &self,
+        &mut self,
         def_id: DefId,
         _linkage: Linkage,
         visibility: Visibility,
@@ -42,7 +42,7 @@ impl<'gcc, 'tcx> PreDefineCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
 
     #[cfg_attr(not(feature = "master"), allow(unused_variables))]
     fn predefine_fn(
-        &self,
+        &mut self,
         instance: Instance<'tcx>,
         linkage: Linkage,
         visibility: Visibility,