Treat inline(always) as inline(usually)

Author: saethlin

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -543,7 +543,7 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                         .emit();
                     InlineAttr::None
                 } else if list_contains_name(items, sym::always) {
-                    InlineAttr::Always
+                    InlineAttr::Usually
                 } else if list_contains_name(items, sym::never) {
                     InlineAttr::Never
                 } else if list_contains_name(items, sym::usually) {

compiler/rustc_middle/src/mir/mono.rs

@@ -138,7 +138,7 @@ impl<'tcx> MonoItem<'tcx> {
                 // conflict with upstream crates as it could be an exported
                 // symbol.
                 match tcx.codegen_fn_attrs(instance.def_id()).inline {
-                    InlineAttr::Always | InlineAttr::Usually => InstantiationMode::LocalCopy,
+                    InlineAttr::Always => InstantiationMode::LocalCopy,
                     _ => InstantiationMode::GloballyShared { may_conflict: true },
                 }
             }