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Rollup merge of #96882 - jackh726:no-subst, r=oli-obk

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Don't subst an AdtDef with its own substs
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Yuki Okushi 2022-05-11 00:09:36 +09:00 committed by GitHub
commit c5f2c4476e
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1 changed files with 3 additions and 7 deletions
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10
compiler/rustc_lint/src/builtin.rs
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@ -41,7 +41,7 @@
use rustc_middle::lint::{in_external_macro, LintDiagnosticBuilder};
use rustc_middle::ty::layout::{LayoutError, LayoutOf};
use rustc_middle::ty::print::with_no_trimmed_paths;
use rustc_middle::ty::subst::{GenericArgKind, Subst};
use rustc_middle::ty::subst::GenericArgKind;
use rustc_middle::ty::Instance;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_session::lint::{BuiltinLintDiagnostics, FutureIncompatibilityReason};
@ -2777,7 +2777,7 @@ fn structurally_same_type_impl<'tcx>(
let mut ty = ty;
loop {
if let ty::Adt(def, substs) = *ty.kind() {
let is_transparent = def.subst(tcx, substs).repr().transparent();
let is_transparent = def.repr().transparent();
let is_non_null = crate::types::nonnull_optimization_guaranteed(tcx, def);
debug!(
"non_transparent_ty({:?}) -- type is transparent? {}, type is non-null? {}",
@ -2837,11 +2837,7 @@ fn structurally_same_type_impl<'tcx>(
ensure_sufficient_stack(|| {
match (a_kind, b_kind) {
(Adt(a_def, a_substs), Adt(b_def, b_substs)) => {
let a = a.subst(cx.tcx, a_substs);
let b = b.subst(cx.tcx, b_substs);
debug!("Comparing {:?} and {:?}", a, b);
(Adt(a_def, _), Adt(b_def, _)) => {
// We can immediately rule out these types as structurally same if
// their layouts differ.
match compare_layouts(a, b) {