From edd08e020cb1269a0f171e0502d8bc166c78e58b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?John=20K=C3=A5re=20Alsaker?= Date: Fri, 7 Dec 2018 00:56:19 +0100 Subject: [PATCH] Optimize away a move --- src/librustc/ty/query/plumbing.rs | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/librustc/ty/query/plumbing.rs b/src/librustc/ty/query/plumbing.rs index a73b92ed713ec..3f90f072ddbdf 100644 --- a/src/librustc/ty/query/plumbing.rs +++ b/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(),