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authorbors <bors@rust-lang.org>2024-11-27 21:19:54 +0000
committerbors <bors@rust-lang.org>2024-11-27 21:19:54 +0000
commit66adeaf46b7a646daeed29518ef76235fcdb9726 (patch)
treeaab55cde5a2a3e91e92ae055e72abb998ac56b88
parent6b6a867ae9eac4e78d041ac4ee84be1072a48cf7 (diff)
parentb6c80a610fd075fe1f4c72972d19c8586a2a586e (diff)
downloadrust-66adeaf46b7a646daeed29518ef76235fcdb9726.tar.gz
rust-66adeaf46b7a646daeed29518ef76235fcdb9726.zip
Auto merge of #133509 - Urgau:dangling_lint_perf, r=Noratrieb
Recover some lost performence from #132732

This PR reorders some conditions in the `dangling_pointers_from_temporaries` lint to avoid some potentially expensive query call, in particular those who could involve some metadata decoding from disk.

cc https://github.com/rust-lang/rust/pull/132732#issuecomment-2499990683
cc `@Kobzol`
-rw-r--r--compiler/rustc_lint/src/dangling.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_lint/src/dangling.rs b/compiler/rustc_lint/src/dangling.rs
index e3e51ba263d..7e298a9a63c 100644
--- a/compiler/rustc_lint/src/dangling.rs
+++ b/compiler/rustc_lint/src/dangling.rs
@@ -130,11 +130,11 @@ impl DanglingPointerSearcher<'_, '_> {
 
 fn lint_expr(cx: &LateContext<'_>, expr: &Expr<'_>) {
     if let ExprKind::MethodCall(method, receiver, _args, _span) = expr.kind
-        && let Some(fn_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id)
-        && cx.tcx.has_attr(fn_id, sym::rustc_as_ptr)
         && is_temporary_rvalue(receiver)
         && let ty = cx.typeck_results().expr_ty(receiver)
         && owns_allocation(cx.tcx, ty)
+        && let Some(fn_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id)
+        && cx.tcx.has_attr(fn_id, sym::rustc_as_ptr)
     {
         // FIXME: use `emit_node_lint` when `#[primary_span]` is added.
         cx.tcx.emit_node_span_lint(