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Auto merge of #125410 - fmease:adj-lint-diag-api, r=nnethercote

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[perf] Delay the construction of early lint diag structs

Attacks some of the perf regressions from https://github.com/rust-lang/rust/pull/124417#issuecomment-2123700666.

See individual commits for details. The first three commits are not strictly necessary.
However, the 2nd one (06bc4fc671, *Remove `LintDiagnostic::msg`*) makes the main change way nicer to implement.
It's also pretty sweet on its own if I may say so myself.
This commit is contained in:
bors 2024-05-27 08:44:12 +00:00
commit b582f807fa
50 changed files with 598 additions and 749 deletions
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18
compiler/rustc_hir_analysis/src/check/check.rs
View file

@ -46,13 +46,9 @@ pub fn check_abi(tcx: TyCtxt<'_>, hir_id: hir::HirId, span: Span, abi: Abi) {
.emit();
}
None => {
tcx.node_span_lint(
UNSUPPORTED_CALLING_CONVENTIONS,
hir_id,
span,
"use of calling convention not supported on this target",
|_| {},
);
tcx.node_span_lint(UNSUPPORTED_CALLING_CONVENTIONS, hir_id, span, |lint| {
lint.primary_message("use of calling convention not supported on this target");
});
}
}
@ -243,8 +239,8 @@ fn check_static_inhabited(tcx: TyCtxt<'_>, def_id: LocalDefId) {
UNINHABITED_STATIC,
tcx.local_def_id_to_hir_id(def_id),
span,
"static of uninhabited type",
|lint| {
lint.primary_message("static of uninhabited type");
lint
.note("uninhabited statics cannot be initialized, and any access would be an immediate error");
},
@ -1310,9 +1306,11 @@ pub(super) fn check_transparent<'tcx>(tcx: TyCtxt<'tcx>, adt: ty::AdtDef<'tcx>)
REPR_TRANSPARENT_EXTERNAL_PRIVATE_FIELDS,
tcx.local_def_id_to_hir_id(adt.did().expect_local()),
span,
"zero-sized fields in `repr(transparent)` cannot \
contain external non-exhaustive types",
|lint| {
lint.primary_message(
"zero-sized fields in `repr(transparent)` cannot \
contain external non-exhaustive types",
);
let note = if non_exhaustive {
"is marked with `#[non_exhaustive]`"
} else {

2
compiler/rustc_hir_analysis/src/check/intrinsicck.rs
View file

@ -281,8 +281,8 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
lint::builtin::ASM_SUB_REGISTER,
expr.hir_id,
spans,
"formatting may not be suitable for sub-register argument",
|lint| {
lint.primary_message("formatting may not be suitable for sub-register argument");
lint.span_label(expr.span, "for this argument");
lint.help(format!(
"use `{{{idx}:{suggested_modifier}}}` to have the register formatted as `{suggested_result}` (for {suggested_size}-bit values)",

13
compiler/rustc_hir_analysis/src/check_unused.rs
View file

@ -35,11 +35,12 @@ fn check_unused_traits(tcx: TyCtxt<'_>, (): ()) {
continue;
}
let (path, _) = item.expect_use();
let msg = if let Ok(snippet) = tcx.sess.source_map().span_to_snippet(path.span) {
format!("unused import: `{snippet}`")
} else {
"unused import".to_owned()
};
tcx.node_span_lint(lint::builtin::UNUSED_IMPORTS, item.hir_id(), path.span, msg, |_| {});
tcx.node_span_lint(lint::builtin::UNUSED_IMPORTS, item.hir_id(), path.span, |lint| {
if let Ok(snippet) = tcx.sess.source_map().span_to_snippet(path.span) {
lint.primary_message(format!("unused import: `{snippet}`"));
} else {
lint.primary_message("unused import");
}
});
}
}

5
compiler/rustc_hir_analysis/src/collect/generics_of.rs
View file

@ -317,8 +317,9 @@ pub(super) fn generics_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Generics {
lint::builtin::INVALID_TYPE_PARAM_DEFAULT,
param.hir_id,
param.span,
TYPE_DEFAULT_NOT_ALLOWED,
|_| {},
|lint| {
lint.primary_message(TYPE_DEFAULT_NOT_ALLOWED);
},
);
}
Defaults::Deny => {

5
compiler/rustc_hir_analysis/src/hir_ty_lowering/generics.rs
View file

@ -646,8 +646,9 @@ pub(crate) fn prohibit_explicit_late_bound_lifetimes(
LATE_BOUND_LIFETIME_ARGUMENTS,
args.args[0].hir_id(),
multispan,
msg,
|_| {},
|lint| {
lint.primary_message(msg);
},
);
}

4
compiler/rustc_hir_analysis/src/hir_ty_lowering/lint.rs
View file

@ -72,8 +72,8 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
self.maybe_suggest_assoc_ty_bound(self_ty, &mut diag);
diag.stash(self_ty.span, StashKey::TraitMissingMethod);
} else {
let msg = "trait objects without an explicit `dyn` are deprecated";
tcx.node_span_lint(BARE_TRAIT_OBJECTS, self_ty.hir_id, self_ty.span, msg, |lint| {
tcx.node_span_lint(BARE_TRAIT_OBJECTS, self_ty.hir_id, self_ty.span, |lint| {
lint.primary_message("trait objects without an explicit `dyn` are deprecated");
if self_ty.span.can_be_used_for_suggestions() {
lint.multipart_suggestion_verbose(
"if this is an object-safe trait, use `dyn`",

47
compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
View file

@ -1165,33 +1165,28 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
let ty = self.lower_assoc_ty(span, assoc_ty_did, assoc_segment, bound);
if let Some(variant_def_id) = variant_resolution {
tcx.node_span_lint(
AMBIGUOUS_ASSOCIATED_ITEMS,
hir_ref_id,
span,
"ambiguous associated item",
|lint| {
let mut could_refer_to = |kind: DefKind, def_id, also| {
let note_msg = format!(
"`{}` could{} refer to the {} defined here",
assoc_ident,
also,
tcx.def_kind_descr(kind, def_id)
);
lint.span_note(tcx.def_span(def_id), note_msg);
};
could_refer_to(DefKind::Variant, variant_def_id, "");
could_refer_to(DefKind::AssocTy, assoc_ty_did, " also");
lint.span_suggestion(
span,
"use fully-qualified syntax",
format!("<{} as {}>::{}", qself_ty, tcx.item_name(trait_did), assoc_ident),
Applicability::MachineApplicable,
tcx.node_span_lint(AMBIGUOUS_ASSOCIATED_ITEMS, hir_ref_id, span, |lint| {
lint.primary_message("ambiguous associated item");
let mut could_refer_to = |kind: DefKind, def_id, also| {
let note_msg = format!(
"`{}` could{} refer to the {} defined here",
assoc_ident,
also,
tcx.def_kind_descr(kind, def_id)
);
},
);
lint.span_note(tcx.def_span(def_id), note_msg);
};
could_refer_to(DefKind::Variant, variant_def_id, "");
could_refer_to(DefKind::AssocTy, assoc_ty_did, " also");
lint.span_suggestion(
span,
"use fully-qualified syntax",
format!("<{} as {}>::{}", qself_ty, tcx.item_name(trait_did), assoc_ident),
Applicability::MachineApplicable,
);
});
}
Ok((ty, DefKind::AssocTy, assoc_ty_did))
}