Check for rustc_no_mir_inline earlier

Author: saethlin

compiler/rustc_mir_transform/src/inline.rs

@@ -280,10 +280,6 @@ impl<'tcx> Inliner<'tcx> {
             }
         }
 
-        if self.tcx.has_attr(callsite.callee.def_id(), sym::rustc_no_mir_inline) {
-            return Err("found #[rustc_no_mir_inline] on callee");
-        }
-
         let old_blocks = caller_body.basic_blocks.next_index();
         self.inline_call(caller_body, callsite, callee_body);
         let new_blocks = old_blocks..caller_body.basic_blocks.next_index();
@@ -418,6 +414,10 @@ impl<'tcx> Inliner<'tcx> {
         callee_attrs: &CodegenFnAttrs,
         cross_crate_inlinable: bool,
     ) -> Result<(), &'static str> {
+        if self.tcx.has_attr(callsite.callee.def_id(), sym::rustc_no_mir_inline) {
+            return Err("#[rustc_no_mir_inline]");
+        }
+
         if let InlineAttr::Never = callee_attrs.inline {
             return Err("never inline hint");
         }