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Auto merge of #108006 - cjgillot:def-impl, r=oli-obk

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Avoid accessing HIR when it can be avoided

Experiment to see if it helps some incremental cases.

Will be rebased once https://github.com/rust-lang/rust/pull/107942 gets merged.

r? `@ghost`
This commit is contained in:
bors 2023-02-15 16:14:10 +00:00
commit 2d14db321b
43 changed files with 316 additions and 777 deletions
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3
compiler/rustc_const_eval/src/const_eval/fn_queries.rs
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@ -17,7 +17,8 @@ pub fn is_unstable_const_fn(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Symbol> {
pub fn is_parent_const_impl_raw(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
let parent_id = tcx.local_parent(def_id);
tcx.def_kind(parent_id) == DefKind::Impl && tcx.constness(parent_id) == hir::Constness::Const
matches!(tcx.def_kind(parent_id), DefKind::Impl { .. })
&& tcx.constness(parent_id) == hir::Constness::Const
}
/// Checks whether an item is considered to be `const`. If it is a constructor, it is const. If