Unrolled build for #160454

Rollup merge of #160454 - Sa4dUs:offload-fix-perf, r=ZuseZ4

Add offload guard flags to typeck to prevent perf regressions

Fixes perf regression in #158693

r? @ZuseZ4

Author: rust-timer

compiler/rustc_hir_typeck/src/expr.rs

@@ -631,7 +631,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 // be known if explicitly specified via turbofish).
                 self.deferred_transmute_checks.borrow_mut().push((*from, to, expr.hir_id));
             }
-            if tcx.is_intrinsic(did, sym::offload) {
+            if !tcx.sess.opts.unstable_opts.offload.is_empty()
+                && tcx.is_intrinsic(did, sym::offload)
+            {
                 let args = args.skip_binder();
                 let f = args.type_at(0);
                 let t = args.type_at(1);

compiler/rustc_interface/src/passes.rs

@@ -1154,7 +1154,9 @@ fn run_required_analyses(tcx: TyCtxt<'_>) {
             if not_typeck_child {
                 tcx.ensure_ok().mir_borrowck(def_id);
                 tcx.ensure_ok().check_transmutes(def_id);
-                tcx.ensure_ok().check_offloads(def_id);
+                if !tcx.sess.opts.unstable_opts.offload.is_empty() {
+                    tcx.ensure_ok().check_offloads(def_id);
+                }
             }
             tcx.ensure_ok().has_ffi_unwind_calls(def_id);
             tcx.ensure_ok().check_liveness(def_id);

compiler/rustc_middle/src/queries.rs

@@ -1135,7 +1135,7 @@ rustc_queries! {
         desc { "check transmute calls inside `{}`", tcx.def_path_str(key) }
     }
 
-    /// Unsafety-check this `LocalDefId`.
+    /// Type-check offloads calls given a typeck root
     query check_offloads(key: LocalDefId) -> Result<(), ErrorGuaranteed> {
         desc { "check offload calls inside `{}`", tcx.def_path_str(key) }
     }