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Rollup merge of #132627 - adwinwhite:thir_body_cleanup, r=compiler-errors

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cleanup: Remove outdated comment of `thir_body`

When typeck fails, `thir_body` returns `ErrorGuaranteed` rather than empty body.

No other code follows this outdated description except `check_unsafety`, which is also cleaned up in this PR.
This commit is contained in:
Matthias Krüger 2024-11-12 06:27:17 +01:00 committed by GitHub
commit 2ad4a3568d
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2 changed files with 1 additions and 5 deletions
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2
compiler/rustc_middle/src/query/mod.rs
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@ -463,7 +463,7 @@ rustc_queries! {
separate_provide_extern
}
/// Fetch the THIR for a given body. If typeck for that body failed, returns an empty `Thir`.
/// Fetch the THIR for a given body.
query thir_body(key: LocalDefId) -> Result<(&'tcx Steal<thir::Thir<'tcx>>, thir::ExprId), ErrorGuaranteed> {
// Perf tests revealed that hashing THIR is inefficient (see #85729).
no_hash

4
compiler/rustc_mir_build/src/check_unsafety.rs
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@ -1005,10 +1005,6 @@ pub(crate) fn check_unsafety(tcx: TyCtxt<'_>, def: LocalDefId) {
// Runs all other queries that depend on THIR.
tcx.ensure_with_value().mir_built(def);
let thir = &thir.steal();
// If `thir` is empty, a type error occurred, skip this body.
if thir.exprs.is_empty() {
return;
}
let hir_id = tcx.local_def_id_to_hir_id(def);
let safety_context = tcx.hir().fn_sig_by_hir_id(hir_id).map_or(SafetyContext::Safe, |fn_sig| {