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Auto merge of #115762 - oli-obk:early_const_prop_lint2, r=<try>
Avoid revealing in layout_of r? `@compiler-errors` I feel like `layout_of` is doing too many things at once, and I don't really know why. It could allow us to if callers could decide whether to reveal opaque types.
2 parents 3ebb562 + 21e8d63 commit ec12977

12 files changed

+28
-28
lines changed

‎.gitignore

+2
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@@ -52,6 +52,8 @@ build/
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/src/tools/x/target
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# Created by default with `src/ci/docker/run.sh`
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/obj/
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# Created on ICE during build
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rustc-ice-*.txt
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## Temporary files
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*~

‎compiler/rustc_middle/src/ty/layout.rs

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@@ -324,6 +324,7 @@ impl<'tcx> SizeSkeleton<'tcx> {
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param_env: ty::ParamEnv<'tcx>,
325325
) -> Result<SizeSkeleton<'tcx>, &'tcx LayoutError<'tcx>> {
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debug_assert!(!ty.has_non_region_infer());
327+
let param_env = param_env.with_reveal_all_normalized(tcx);
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328329
// First try computing a static layout.
329330
let err = match tcx.layout_of(param_env.and(ty)) {

‎compiler/rustc_mir_transform/src/const_prop_lint.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -176,7 +176,7 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
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) -> ConstPropagator<'mir, 'tcx> {
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let def_id = body.source.def_id();
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let args = &GenericArgs::identity_for_item(tcx, def_id);
179-
let param_env = tcx.param_env_reveal_all_normalized(def_id);
179+
let param_env = tcx.param_env(def_id);
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181181
let can_const_prop = CanConstProp::check(tcx, param_env, body);
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let mut ecx = InterpCx::new(

‎compiler/rustc_passes/src/layout_test.rs

+1-1
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@@ -66,7 +66,7 @@ pub fn ensure_wf<'tcx>(
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}
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fn dump_layout_of(tcx: TyCtxt<'_>, item_def_id: LocalDefId, attr: &Attribute) {
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let param_env = tcx.param_env(item_def_id);
69+
let param_env = tcx.param_env_reveal_all_normalized(item_def_id);
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let ty = tcx.type_of(item_def_id).instantiate_identity();
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let span = tcx.def_span(item_def_id.to_def_id());
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if !ensure_wf(tcx, param_env, ty, item_def_id, span) {

‎compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs

+4-1
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@@ -1106,7 +1106,10 @@ pub fn typeid_for_instance<'tcx>(
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options: TypeIdOptions,
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) -> String {
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let fn_abi = tcx
1109-
.fn_abi_of_instance(tcx.param_env(instance.def_id()).and((*instance, ty::List::empty())))
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.fn_abi_of_instance(
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tcx.param_env_reveal_all_normalized(instance.def_id())
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.and((*instance, ty::List::empty())),
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)
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.unwrap_or_else(|instance| {
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bug!("typeid_for_instance: couldn't get fn_abi of instance {:?}", instance)
11121115
});

‎compiler/rustc_ty_utils/src/layout.rs

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Original file line numberDiff line numberDiff line change
@@ -36,7 +36,6 @@ fn layout_of<'tcx>(
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let (param_env, ty) = query.into_parts();
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debug!(?ty);
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39-
let param_env = param_env.with_reveal_all_normalized(tcx);
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let unnormalized_ty = ty;
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// FIXME: We might want to have two different versions of `layout_of`:

‎src/etc/rust_analyzer_settings.json

+1-1
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@@ -16,7 +16,7 @@
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"compiler/rustc_codegen_gcc/Cargo.toml"
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],
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"rust-analyzer.rustfmt.overrideCommand": [
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"./build/host/rustfmt/bin/rustfmt",
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"${workspaceFolder}/build/host/rustfmt/bin/rustfmt",
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"--edition=2021"
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],
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"rust-analyzer.procMacro.server": "./build/host/stage0/libexec/rust-analyzer-proc-macro-srv",

‎tests/ui/associated-consts/issue-24949-assoc-const-static-recursion-impl.stderr

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@@ -4,11 +4,6 @@ error[E0391]: cycle detected when elaborating drops for `<impl at $DIR/issue-249
44
LL | const BAR: u32 = IMPL_REF_BAR;
55
| ^^^^^^^^^^^^
66
|
7-
note: ...which requires const-evaluating + checking `IMPL_REF_BAR`...
8-
--> $DIR/issue-24949-assoc-const-static-recursion-impl.rs:7:1
9-
|
10-
LL | const IMPL_REF_BAR: u32 = GlobalImplRef::BAR;
11-
| ^^^^^^^^^^^^^^^^^^^^^^^
127
note: ...which requires const-evaluating + checking `IMPL_REF_BAR`...
138
--> $DIR/issue-24949-assoc-const-static-recursion-impl.rs:7:27
149
|

‎tests/ui/associated-consts/issue-24949-assoc-const-static-recursion-trait-default.stderr

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@@ -4,11 +4,6 @@ error[E0391]: cycle detected when elaborating drops for `FooDefault::BAR`
44
LL | const BAR: u32 = DEFAULT_REF_BAR;
55
| ^^^^^^^^^^^^^^^
66
|
7-
note: ...which requires const-evaluating + checking `DEFAULT_REF_BAR`...
8-
--> $DIR/issue-24949-assoc-const-static-recursion-trait-default.rs:11:1
9-
|
10-
LL | const DEFAULT_REF_BAR: u32 = <GlobalDefaultRef>::BAR;
11-
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
127
note: ...which requires const-evaluating + checking `DEFAULT_REF_BAR`...
138
--> $DIR/issue-24949-assoc-const-static-recursion-trait-default.rs:11:30
149
|

‎tests/ui/associated-consts/issue-24949-assoc-const-static-recursion-trait.stderr

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@@ -4,11 +4,6 @@ error[E0391]: cycle detected when elaborating drops for `<impl at $DIR/issue-249
44
LL | const BAR: u32 = TRAIT_REF_BAR;
55
| ^^^^^^^^^^^^^
66
|
7-
note: ...which requires const-evaluating + checking `TRAIT_REF_BAR`...
8-
--> $DIR/issue-24949-assoc-const-static-recursion-trait.rs:7:1
9-
|
10-
LL | const TRAIT_REF_BAR: u32 = <GlobalTraitRef>::BAR;
11-
| ^^^^^^^^^^^^^^^^^^^^^^^^
127
note: ...which requires const-evaluating + checking `TRAIT_REF_BAR`...
138
--> $DIR/issue-24949-assoc-const-static-recursion-trait.rs:7:28
149
|

‎tests/ui/recursion/issue-26548-recursion-via-normalize.rs

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@@ -1,11 +1,11 @@
1-
//~ ERROR cycle detected when computing layout of `core::option::Option<S>`
1+
//~ ERROR cycle detected when computing layout of `core::option::Option<<S as Mirror>::It>`
22
//~| NOTE see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
33
//~| NOTE ...which requires computing layout of `S`...
4-
//~| NOTE ...which requires computing layout of `core::option::Option<<S as Mirror>::It>`...
5-
//~| NOTE ...which again requires computing layout of `core::option::Option<S>`, completing the cycle
6-
//~| NOTE cycle used when computing layout of `core::option::Option<<S as Mirror>::It>`
4+
//~| NOTE ...which again requires computing layout of `core::option::Option<<S as Mirror>::It>`, completing the cycle
5+
//~| NOTE ...which requires computing layout of `core::option::Option<S>`...
76

87
trait Mirror {
8+
//~^ NOTE: cycle used when checking deathness of variables in top-level module
99
type It: ?Sized;
1010
}
1111
impl<T: ?Sized> Mirror for T {

‎tests/ui/recursion/issue-26548-recursion-via-normalize.stderr

+14-4
Original file line numberDiff line numberDiff line change
@@ -1,9 +1,19 @@
1-
error[E0391]: cycle detected when computing layout of `core::option::Option<S>`
1+
error[E0391]: cycle detected when computing layout of `core::option::Option<<S as Mirror>::It>`
22
|
3+
= note: ...which requires computing layout of `core::option::Option<S>`...
34
= note: ...which requires computing layout of `S`...
4-
= note: ...which requires computing layout of `core::option::Option<<S as Mirror>::It>`...
5-
= note: ...which again requires computing layout of `core::option::Option<S>`, completing the cycle
6-
= note: cycle used when computing layout of `core::option::Option<<S as Mirror>::It>`
5+
= note: ...which again requires computing layout of `core::option::Option<<S as Mirror>::It>`, completing the cycle
6+
note: cycle used when checking deathness of variables in top-level module
7+
--> $DIR/issue-26548-recursion-via-normalize.rs:7:1
8+
|
9+
LL | / trait Mirror {
10+
LL | |
11+
LL | | type It: ?Sized;
12+
LL | | }
13+
... |
14+
LL | | let _s = S(None);
15+
LL | | }
16+
| |_^
717
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
818

919
error: aborting due to previous error

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