Rollup merge of rust-lang#57027 - Zoxc:query-perf5, r=michaelwoerister

Optimize away a move

r? @michaelwoerister

src/librustc/ty/query/plumbing.rs

@@ -136,11 +136,14 @@ impl<'a, 'tcx, Q: QueryDescription<'tcx>> JobOwner<'a, 'tcx, Q> {
  Entry::Vacant(entry) => {
  // No job entry for this query. Return a new one to be started later
  return tls::with_related_context(tcx, |icx| {
+ // Create the `parent` variable before `info`. This allows LLVM
+ // to elide the move of `info`
+ let parent = icx.query.clone();
  let info = QueryInfo {
  span,
  query: Q::query(key.clone()),
  };
- let job = Lrc::new(QueryJob::new(info, icx.query.clone()));
+ let job = Lrc::new(QueryJob::new(info, parent));
  let owner = JobOwner {
  cache,
  job: job.clone(),