nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-11-21 22:34:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

Rollup merge of #132403 - lcnr:typing-mode, r=compiler-errors

Browse Source 
continue `TypingMode` refactor

There are still quite a few places which (indirectly) rely on the `Reveal` of a `ParamEnv`, but we're slowly getting there

r? `@compiler-errors`
This commit is contained in:
Jubilee 2024-10-31 17:50:43 -07:00 committed by GitHub
commit c57b351d38
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
20 changed files with 155 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
compiler/rustc_const_eval/src/check_consts/check.rs
View File

@ -16,7 +16,7 @@ use rustc_middle::mir::visit::Visitor;
use rustc_middle::mir::*;
use rustc_middle::span_bug;
use rustc_middle::ty::adjustment::PointerCoercion;
use rustc_middle::ty::{self, Instance, InstanceKind, Ty, TypeVisitableExt, TypingMode};
use rustc_middle::ty::{self, Instance, InstanceKind, Ty, TypeVisitableExt};
use rustc_mir_dataflow::Analysis;
use rustc_mir_dataflow::impls::MaybeStorageLive;
use rustc_mir_dataflow::storage::always_storage_live_locals;
@ -589,7 +589,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
// Typeck only does a "non-const" check since it operates on HIR and cannot distinguish
// which path expressions are getting called on and which path expressions are only used
// as function pointers. This is required for correctness.
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let infcx = tcx.infer_ctxt().build(body.typing_mode(tcx));
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let predicates = tcx.predicates_of(callee).instantiate(tcx, fn_args);

7
compiler/rustc_const_eval/src/check_consts/mod.rs
View File

@ -32,14 +32,7 @@ impl<'mir, 'tcx> ConstCx<'mir, 'tcx> {
pub fn new(tcx: TyCtxt<'tcx>, body: &'mir mir::Body<'tcx>) -> Self {
let def_id = body.source.def_id().expect_local();
let param_env = tcx.param_env(def_id);
Self::new_with_param_env(tcx, body, param_env)
}
pub fn new_with_param_env(
tcx: TyCtxt<'tcx>,
body: &'mir mir::Body<'tcx>,
param_env: ty::ParamEnv<'tcx>,
) -> Self {
let const_kind = tcx.hir().body_const_context(body.source.def_id().expect_local());
ConstCx { body, tcx, param_env, const_kind }
}

4
compiler/rustc_const_eval/src/check_consts/ops.rs
View File

@ -12,7 +12,7 @@ use rustc_middle::mir::CallSource;
use rustc_middle::span_bug;
use rustc_middle::ty::print::{PrintTraitRefExt as _, with_no_trimmed_paths};
use rustc_middle::ty::{
self, Closure, FnDef, FnPtr, GenericArgKind, GenericArgsRef, Param, TraitRef, Ty, TypingMode,
self, Closure, FnDef, FnPtr, GenericArgKind, GenericArgsRef, Param, TraitRef, Ty,
suggest_constraining_type_param,
};
use rustc_middle::util::{CallDesugaringKind, CallKind, call_kind};
@ -116,7 +116,7 @@ impl<'tcx> NonConstOp<'tcx> for FnCallNonConst<'tcx> {
let obligation =
Obligation::new(tcx, ObligationCause::dummy(), param_env, trait_ref);
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let infcx = tcx.infer_ctxt().build(body.typing_mode(tcx));
let mut selcx = SelectionContext::new(&infcx);
let implsrc = selcx.select(&obligation);

21
compiler/rustc_const_eval/src/interpret/eval_context.rs
View File

@ -3,7 +3,7 @@ use rustc_errors::DiagCtxtHandle;
use rustc_hir::def_id::DefId;
use rustc_infer::infer::TyCtxtInferExt;
use rustc_infer::infer::at::ToTrace;
use rustc_infer::traits::ObligationCause;
use rustc_infer::traits::{ObligationCause, Reveal};
use rustc_middle::mir::interpret::{ErrorHandled, InvalidMetaKind, ReportedErrorInfo};
use rustc_middle::query::TyCtxtAt;
use rustc_middle::ty::layout::{
@ -116,6 +116,7 @@ impl<'tcx, M: Machine<'tcx>> FnAbiOfHelpers<'tcx> for InterpCx<'tcx, M> {
/// This test should be symmetric, as it is primarily about layout compatibility.
pub(super) fn mir_assign_valid_types<'tcx>(
tcx: TyCtxt<'tcx>,
typing_mode: TypingMode<'tcx>,
param_env: ParamEnv<'tcx>,
src: TyAndLayout<'tcx>,
dest: TyAndLayout<'tcx>,
@ -124,7 +125,7 @@ pub(super) fn mir_assign_valid_types<'tcx>(
// all normal lifetimes are erased, higher-ranked types with their
// late-bound lifetimes are still around and can lead to type
// differences.
if util::relate_types(tcx, param_env, Variance::Covariant, src.ty, dest.ty) {
if util::relate_types(tcx, typing_mode, param_env, Variance::Covariant, src.ty, dest.ty) {
// Make sure the layout is equal, too -- just to be safe. Miri really
// needs layout equality. For performance reason we skip this check when
// the types are equal. Equal types *can* have different layouts when
@ -144,6 +145,7 @@ pub(super) fn mir_assign_valid_types<'tcx>(
#[cfg_attr(not(debug_assertions), inline(always))]
pub(super) fn from_known_layout<'tcx>(
tcx: TyCtxtAt<'tcx>,
typing_mode: TypingMode<'tcx>,
param_env: ParamEnv<'tcx>,
known_layout: Option<TyAndLayout<'tcx>>,
compute: impl FnOnce() -> InterpResult<'tcx, TyAndLayout<'tcx>>,
@ -153,7 +155,13 @@ pub(super) fn from_known_layout<'tcx>(
Some(known_layout) => {
if cfg!(debug_assertions) {
let check_layout = compute()?;
if !mir_assign_valid_types(tcx.tcx, param_env, check_layout, known_layout) {
if !mir_assign_valid_types(
tcx.tcx,
typing_mode,
param_env,
check_layout,
known_layout,
) {
span_bug!(
tcx.span,
"expected type differs from actual type.\nexpected: {}\nactual: {}",
@ -203,6 +211,11 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
}
}
pub fn typing_mode(&self) -> TypingMode<'tcx> {
debug_assert_eq!(self.param_env.reveal(), Reveal::All);
TypingMode::PostAnalysis
}
/// Returns the span of the currently executed statement/terminator.
/// This is the span typically used for error reporting.
#[inline(always)]
@ -327,7 +340,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
return true;
}
// Slow path: spin up an inference context to check if these traits are sufficiently equal.
let infcx = self.tcx.infer_ctxt().build(TypingMode::from_param_env(self.param_env));
let infcx = self.tcx.infer_ctxt().build(self.typing_mode());
let ocx = ObligationCtxt::new(&infcx);
let cause = ObligationCause::dummy_with_span(self.cur_span());
// equate the two trait refs after normalization

5
compiler/rustc_const_eval/src/interpret/operand.rs
View File

@ -773,6 +773,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
)?;
if !mir_assign_valid_types(
*self.tcx,
self.typing_mode(),
self.param_env,
self.layout_of(normalized_place_ty)?,
op.layout,
@ -832,7 +833,9 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
})
};
let layout =
from_known_layout(self.tcx, self.param_env, layout, || self.layout_of(ty).into())?;
from_known_layout(self.tcx, self.typing_mode(), self.param_env, layout, || {
self.layout_of(ty).into()
})?;
let imm = match val_val {
mir::ConstValue::Indirect { alloc_id, offset } => {
// This is const data, no mutation allowed.

10
compiler/rustc_const_eval/src/interpret/place.rs
View File

@ -540,6 +540,7 @@ where
)?;
if !mir_assign_valid_types(
*self.tcx,
self.typing_mode(),
self.param_env,
self.layout_of(normalized_place_ty)?,
place.layout,
@ -870,8 +871,13 @@ where
) -> InterpResult<'tcx> {
// We do NOT compare the types for equality, because well-typed code can
// actually "transmute" `&mut T` to `&T` in an assignment without a cast.
let layout_compat =
mir_assign_valid_types(*self.tcx, self.param_env, src.layout(), dest.layout());
let layout_compat = mir_assign_valid_types(
*self.tcx,
self.typing_mode(),
self.param_env,
src.layout(),
dest.layout(),
);
if !allow_transmute && !layout_compat {
span_bug!(
self.cur_span(),

13
compiler/rustc_const_eval/src/interpret/stack.rs
View File

@ -596,12 +596,13 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
return interp_ok(layout);
}
let layout = from_known_layout(self.tcx, self.param_env, layout, || {
let local_ty = frame.body.local_decls[local].ty;
let local_ty =
self.instantiate_from_frame_and_normalize_erasing_regions(frame, local_ty)?;
self.layout_of(local_ty).into()
})?;
let layout =
from_known_layout(self.tcx, self.typing_mode(), self.param_env, layout, || {
let local_ty = frame.body.local_decls[local].ty;
let local_ty =
self.instantiate_from_frame_and_normalize_erasing_regions(frame, local_ty)?;
self.layout_of(local_ty).into()
})?;
// Layouts of locals are requested a lot, so we cache them.
state.layout.set(Some(layout));

21
compiler/rustc_const_eval/src/util/compare_types.rs
View File

@ -8,24 +8,15 @@ use rustc_middle::traits::ObligationCause;
use rustc_middle::ty::{ParamEnv, Ty, TyCtxt, TypingMode, Variance};
use rustc_trait_selection::traits::ObligationCtxt;
/// Returns whether the two types are equal up to subtyping.
///
/// This is used in case we don't know the expected subtyping direction
/// and still want to check whether anything is broken.
pub fn is_equal_up_to_subtyping<'tcx>(
/// Returns whether `src` is a subtype of `dest`, i.e. `src <: dest`.
pub fn sub_types<'tcx>(
tcx: TyCtxt<'tcx>,
typing_mode: TypingMode<'tcx>,
param_env: ParamEnv<'tcx>,
src: Ty<'tcx>,
dest: Ty<'tcx>,
) -> bool {
// Fast path.
if src == dest {
return true;
}
// Check for subtyping in either direction.
relate_types(tcx, param_env, Variance::Covariant, src, dest)
|| relate_types(tcx, param_env, Variance::Covariant, dest, src)
relate_types(tcx, typing_mode, param_env, Variance::Covariant, src, dest)
}
/// Returns whether `src` is a subtype of `dest`, i.e. `src <: dest`.
@ -35,6 +26,7 @@ pub fn is_equal_up_to_subtyping<'tcx>(
/// because we want to check for type equality.
pub fn relate_types<'tcx>(
tcx: TyCtxt<'tcx>,
typing_mode: TypingMode<'tcx>,
param_env: ParamEnv<'tcx>,
variance: Variance,
src: Ty<'tcx>,
@ -45,8 +37,7 @@ pub fn relate_types<'tcx>(
}
let mut builder = tcx.infer_ctxt().ignoring_regions();
// FIXME(#132279): This should eventually use the already defined hidden types.
let infcx = builder.build(TypingMode::from_param_env(param_env));
let infcx = builder.build(typing_mode);
let ocx = ObligationCtxt::new(&infcx);
let cause = ObligationCause::dummy();
let src = ocx.normalize(&cause, param_env, src);

2
compiler/rustc_const_eval/src/util/mod.rs
View File

@ -8,7 +8,7 @@ mod type_name;
pub use self::alignment::{is_disaligned, is_within_packed};
pub use self::check_validity_requirement::check_validity_requirement;
pub use self::compare_types::{is_equal_up_to_subtyping, relate_types};
pub use self::compare_types::{relate_types, sub_types};
pub use self::type_name::type_name;
/// Classify whether an operator is "left-homogeneous", i.e., the LHS has the

11
compiler/rustc_middle/src/mir/mod.rs
View File

@ -39,7 +39,7 @@ use crate::ty::fold::{FallibleTypeFolder, TypeFoldable};
use crate::ty::print::{FmtPrinter, Printer, pretty_print_const, with_no_trimmed_paths};
use crate::ty::visit::TypeVisitableExt;
use crate::ty::{
self, AdtDef, GenericArg, GenericArgsRef, Instance, InstanceKind, List, Ty, TyCtxt,
self, AdtDef, GenericArg, GenericArgsRef, Instance, InstanceKind, List, Ty, TyCtxt, TypingMode,
UserTypeAnnotationIndex,
};
@ -452,6 +452,15 @@ impl<'tcx> Body<'tcx> {
self.basic_blocks.as_mut()
}
pub fn typing_mode(&self, _tcx: TyCtxt<'tcx>) -> TypingMode<'tcx> {
match self.phase {
// FIXME(#132279): the MIR is quite clearly inside of a body, so we
// should instead reveal opaques defined by that body here.
MirPhase::Built | MirPhase::Analysis(_) => TypingMode::non_body_analysis(),
MirPhase::Runtime(_) => TypingMode::PostAnalysis,
}
}
#[inline]
pub fn local_kind(&self, local: Local) -> LocalKind {
let index = local.as_usize();

11
compiler/rustc_middle/src/mir/syntax.rs
View File

@ -19,9 +19,8 @@ use smallvec::SmallVec;
use super::{BasicBlock, Const, Local, UserTypeProjection};
use crate::mir::coverage::CoverageKind;
use crate::traits::Reveal;
use crate::ty::adjustment::PointerCoercion;
use crate::ty::{self, GenericArgsRef, List, Region, Ty, UserTypeAnnotationIndex};
use crate::ty::{self, GenericArgsRef, List, Region, Ty, TyCtxt, UserTypeAnnotationIndex};
/// Represents the "flavors" of MIR.
///
@ -102,10 +101,10 @@ impl MirPhase {
}
}
pub fn reveal(&self) -> Reveal {
match *self {
MirPhase::Built | MirPhase::Analysis(_) => Reveal::UserFacing,
MirPhase::Runtime(_) => Reveal::All,
pub fn param_env<'tcx>(&self, tcx: TyCtxt<'tcx>, body_def_id: DefId) -> ty::ParamEnv<'tcx> {
match self {
MirPhase::Built | MirPhase::Analysis(_) => tcx.param_env(body_def_id),
MirPhase::Runtime(_) => tcx.param_env_reveal_all_normalized(body_def_id),
}
}
}

27
compiler/rustc_mir_transform/src/inline.rs
View File

@ -244,8 +244,13 @@ impl<'tcx> Inliner<'tcx> {
// Normally, this shouldn't be required, but trait normalization failure can create a
// validation ICE.
let output_type = callee_body.return_ty();
if !util::relate_types(self.tcx, self.param_env, ty::Covariant, output_type, destination_ty)
{
if !util::sub_types(
self.tcx,
caller_body.typing_mode(self.tcx),
self.param_env,
output_type,
destination_ty,
) {
trace!(?output_type, ?destination_ty);
return Err("failed to normalize return type");
}
@ -275,8 +280,13 @@ impl<'tcx> Inliner<'tcx> {
self_arg_ty.into_iter().chain(arg_tuple_tys).zip(callee_body.args_iter())
{
let input_type = callee_body.local_decls[input].ty;
if !util::relate_types(self.tcx, self.param_env, ty::Covariant, input_type, arg_ty)
{
if !util::sub_types(
self.tcx,
caller_body.typing_mode(self.tcx),
self.param_env,
input_type,
arg_ty,
) {
trace!(?arg_ty, ?input_type);
return Err("failed to normalize tuple argument type");
}
@ -285,8 +295,13 @@ impl<'tcx> Inliner<'tcx> {
for (arg, input) in args.iter().zip(callee_body.args_iter()) {
let input_type = callee_body.local_decls[input].ty;
let arg_ty = arg.node.ty(&caller_body.local_decls, self.tcx);
if !util::relate_types(self.tcx, self.param_env, ty::Covariant, input_type, arg_ty)
{
if !util::sub_types(
self.tcx,
caller_body.typing_mode(self.tcx),
self.param_env,
input_type,
arg_ty,
) {
trace!(?arg_ty, ?input_type);
return Err("failed to normalize argument type");
}

27
compiler/rustc_mir_transform/src/validate.rs
View File

@ -5,14 +5,14 @@ use rustc_hir::LangItem;
use rustc_index::IndexVec;
use rustc_index::bit_set::BitSet;
use rustc_infer::infer::TyCtxtInferExt;
use rustc_infer::traits::{Obligation, ObligationCause, Reveal};
use rustc_infer::traits::{Obligation, ObligationCause};
use rustc_middle::mir::coverage::CoverageKind;
use rustc_middle::mir::visit::{NonUseContext, PlaceContext, Visitor};
use rustc_middle::mir::*;
use rustc_middle::ty::adjustment::PointerCoercion;
use rustc_middle::ty::{
self, CoroutineArgsExt, InstanceKind, ParamEnv, ScalarInt, Ty, TyCtxt, TypeVisitableExt,
TypingMode, Variance,
Variance,
};
use rustc_middle::{bug, span_bug};
use rustc_target::abi::{FIRST_VARIANT, Size};
@ -20,7 +20,7 @@ use rustc_target::spec::abi::Abi;
use rustc_trait_selection::traits::ObligationCtxt;
use rustc_type_ir::Upcast;
use crate::util::{is_within_packed, relate_types};
use crate::util::{self, is_within_packed};
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
enum EdgeKind {
@ -50,11 +50,7 @@ impl<'tcx> crate::MirPass<'tcx> for Validator {
}
let def_id = body.source.def_id();
let mir_phase = self.mir_phase;
let param_env = match mir_phase.reveal() {
Reveal::UserFacing => tcx.param_env(def_id),
Reveal::All => tcx.param_env_reveal_all_normalized(def_id),
};
let param_env = mir_phase.param_env(tcx, def_id);
let can_unwind = if mir_phase <= MirPhase::Runtime(RuntimePhase::Initial) {
// In this case `AbortUnwindingCalls` haven't yet been executed.
true
@ -587,7 +583,14 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
Variance::Covariant
};
crate::util::relate_types(self.tcx, self.param_env, variance, src, dest)
crate::util::relate_types(
self.tcx,
self.body.typing_mode(self.tcx),
self.param_env,
variance,
src,
dest,
)
}
/// Check that the given predicate definitely holds in the param-env of this MIR body.
@ -606,7 +609,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
return true;
}
let infcx = self.tcx.infer_ctxt().build(TypingMode::from_param_env(self.param_env));
let infcx = self.tcx.infer_ctxt().build(self.body.typing_mode(self.tcx));
let ocx = ObligationCtxt::new(&infcx);
ocx.register_obligation(Obligation::new(
self.tcx,
@ -798,10 +801,10 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
}
}
ProjectionElem::Subtype(ty) => {
if !relate_types(
if !util::sub_types(
self.tcx,
self.body.typing_mode(self.tcx),
self.param_env,
Variance::Covariant,
ty,
place_ref.ty(&self.body.local_decls, self.tcx).ty,
) {

2
compiler/rustc_trait_selection/src/traits/mod.rs
View File

@ -411,7 +411,7 @@ pub fn normalize_param_env_or_error<'tcx>(
debug!("normalize_param_env_or_error: elaborated-predicates={:?}", predicates);
let elaborated_env = ty::ParamEnv::new(tcx.mk_clauses(&predicates), unnormalized_env.reveal());
if !normalize::needs_normalization(&elaborated_env, unnormalized_env.reveal()) {
if !elaborated_env.has_aliases() {
return elaborated_env;
}

33
compiler/rustc_trait_selection/src/traits/normalize.rs
View File

@ -1,15 +1,16 @@
//! Deeply normalize types using the old trait solver.
use rustc_data_structures::stack::ensure_sufficient_stack;
use rustc_infer::infer::InferOk;
use rustc_infer::infer::at::At;
use rustc_infer::infer::{InferCtxt, InferOk};
use rustc_infer::traits::{
FromSolverError, Normalized, Obligation, PredicateObligations, TraitEngine,
};
use rustc_macros::extension;
use rustc_middle::traits::{ObligationCause, ObligationCauseCode, Reveal};
use rustc_middle::traits::{ObligationCause, ObligationCauseCode};
use rustc_middle::ty::{
self, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperFoldable, TypeVisitable, TypeVisitableExt,
TypingMode,
};
use tracing::{debug, instrument};
@ -109,16 +110,19 @@ where
}
pub(super) fn needs_normalization<'tcx, T: TypeVisitable<TyCtxt<'tcx>>>(
infcx: &InferCtxt<'tcx>,
param_env_for_debug_assertion: ty::ParamEnv<'tcx>,
value: &T,
reveal: Reveal,
) -> bool {
let mut flags = ty::TypeFlags::HAS_ALIAS;
// Opaques are treated as rigid with `Reveal::UserFacing`,
// so we can ignore those.
match reveal {
Reveal::UserFacing => flags.remove(ty::TypeFlags::HAS_TY_OPAQUE),
Reveal::All => {}
match infcx.typing_mode(param_env_for_debug_assertion) {
TypingMode::Coherence | TypingMode::Analysis { defining_opaque_types: _ } => {
flags.remove(ty::TypeFlags::HAS_TY_OPAQUE)
}
TypingMode::PostAnalysis => {}
}
value.has_type_flags(flags)
@ -154,7 +158,7 @@ impl<'a, 'b, 'tcx> AssocTypeNormalizer<'a, 'b, 'tcx> {
"Normalizing {value:?} without wrapping in a `Binder`"
);
if !needs_normalization(&value, self.param_env.reveal()) {
if !needs_normalization(self.selcx.infcx, self.param_env, &value) {
value
} else {
value.fold_with(self)
@ -178,7 +182,7 @@ impl<'a, 'b, 'tcx> TypeFolder<TyCtxt<'tcx>> for AssocTypeNormalizer<'a, 'b, 'tcx
}
fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
if !needs_normalization(&ty, self.param_env.reveal()) {
if !needs_normalization(self.selcx.infcx, self.param_env, &ty) {
return ty;
}
@ -213,10 +217,11 @@ impl<'a, 'b, 'tcx> TypeFolder<TyCtxt<'tcx>> for AssocTypeNormalizer<'a, 'b, 'tcx
match kind {
ty::Opaque => {
// Only normalize `impl Trait` outside of type inference, usually in codegen.
match self.param_env.reveal() {
Reveal::UserFacing => ty.super_fold_with(self),
Reveal::All => {
match self.selcx.infcx.typing_mode(self.param_env) {
TypingMode::Coherence | TypingMode::Analysis { defining_opaque_types: _ } => {
ty.super_fold_with(self)
}
TypingMode::PostAnalysis => {
let recursion_limit = self.cx().recursion_limit();
if !recursion_limit.value_within_limit(self.depth) {
self.selcx.infcx.err_ctxt().report_overflow_error(
@ -403,7 +408,7 @@ impl<'a, 'b, 'tcx> TypeFolder<TyCtxt<'tcx>> for AssocTypeNormalizer<'a, 'b, 'tcx
fn fold_const(&mut self, constant: ty::Const<'tcx>) -> ty::Const<'tcx> {
let tcx = self.selcx.tcx();
if tcx.features().generic_const_exprs()
|| !needs_normalization(&constant, self.param_env.reveal())
|| !needs_normalization(self.selcx.infcx, self.param_env, &constant)
{
constant
} else {
@ -420,7 +425,7 @@ impl<'a, 'b, 'tcx> TypeFolder<TyCtxt<'tcx>> for AssocTypeNormalizer<'a, 'b, 'tcx
#[inline]
fn fold_predicate(&mut self, p: ty::Predicate<'tcx>) -> ty::Predicate<'tcx> {
if p.allow_normalization() && needs_normalization(&p, self.param_env.reveal()) {
if p.allow_normalization() && needs_normalization(self.selcx.infcx, self.param_env, &p) {
p.super_fold_with(self)
} else {
p

29
compiler/rustc_trait_selection/src/traits/project.rs
View File

@ -16,7 +16,7 @@ use rustc_middle::traits::{BuiltinImplSource, ImplSource, ImplSourceUserDefinedD
use rustc_middle::ty::fast_reject::DeepRejectCtxt;
use rustc_middle::ty::fold::TypeFoldable;
use rustc_middle::ty::visit::{MaxUniverse, TypeVisitable, TypeVisitableExt};
use rustc_middle::ty::{self, Term, Ty, TyCtxt, Upcast};
use rustc_middle::ty::{self, Term, Ty, TyCtxt, TypingMode, Upcast};
use rustc_middle::{bug, span_bug};
use rustc_span::symbol::sym;
use tracing::{debug, instrument};
@ -975,18 +975,21 @@ fn assemble_candidates_from_impls<'cx, 'tcx>(
// and the obligation is monomorphic, otherwise passes such as
// transmute checking and polymorphic MIR optimizations could
// get a result which isn't correct for all monomorphizations.
if obligation.param_env.reveal() == Reveal::All {
// NOTE(eddyb) inference variables can resolve to parameters, so
// assume `poly_trait_ref` isn't monomorphic, if it contains any.
let poly_trait_ref = selcx.infcx.resolve_vars_if_possible(trait_ref);
!poly_trait_ref.still_further_specializable()
} else {
debug!(
assoc_ty = ?selcx.tcx().def_path_str(node_item.item.def_id),
?obligation.predicate,
"assemble_candidates_from_impls: not eligible due to default",
);
false
match selcx.infcx.typing_mode(obligation.param_env) {
TypingMode::Coherence | TypingMode::Analysis { .. } => {
debug!(
assoc_ty = ?selcx.tcx().def_path_str(node_item.item.def_id),
?obligation.predicate,
"assemble_candidates_from_impls: not eligible due to default",
);
false
}
TypingMode::PostAnalysis => {
// NOTE(eddyb) inference variables can resolve to parameters, so
// assume `poly_trait_ref` isn't monomorphic, if it contains any.
let poly_trait_ref = selcx.infcx.resolve_vars_if_possible(trait_ref);
!poly_trait_ref.still_further_specializable()
}
}
}
}

20
compiler/rustc_trait_selection/src/traits/query/normalize.rs
View File

@ -9,7 +9,7 @@ use rustc_macros::extension;
pub use rustc_middle::traits::query::NormalizationResult;
use rustc_middle::ty::fold::{FallibleTypeFolder, TypeFoldable, TypeSuperFoldable};
use rustc_middle::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt};
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitor};
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitor, TypingMode};
use rustc_span::DUMMY_SP;
use tracing::{debug, info, instrument};
@ -21,7 +21,7 @@ use crate::infer::canonical::OriginalQueryValues;
use crate::infer::{InferCtxt, InferOk};
use crate::traits::normalize::needs_normalization;
use crate::traits::{
BoundVarReplacer, Normalized, ObligationCause, PlaceholderReplacer, Reveal, ScrubbedTraitError,
BoundVarReplacer, Normalized, ObligationCause, PlaceholderReplacer, ScrubbedTraitError,
};
#[extension(pub trait QueryNormalizeExt<'tcx>)]
@ -89,7 +89,7 @@ impl<'a, 'tcx> At<'a, 'tcx> {
}
}
if !needs_normalization(&value, self.param_env.reveal()) {
if !needs_normalization(self.infcx, self.param_env, &value) {
return Ok(Normalized { value, obligations: PredicateObligations::new() });
}
@ -191,7 +191,7 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for QueryNormalizer<'a, 'tcx> {
#[instrument(level = "debug", skip(self))]
fn try_fold_ty(&mut self, ty: Ty<'tcx>) -> Result<Ty<'tcx>, Self::Error> {
if !needs_normalization(&ty, self.param_env.reveal()) {
if !needs_normalization(self.infcx, self.param_env, &ty) {
return Ok(ty);
}
@ -215,10 +215,12 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for QueryNormalizer<'a, 'tcx> {
let res = match kind {
ty::Opaque => {
// Only normalize `impl Trait` outside of type inference, usually in codegen.
match self.param_env.reveal() {
Reveal::UserFacing => ty.try_super_fold_with(self)?,
match self.infcx.typing_mode(self.param_env) {
TypingMode::Coherence | TypingMode::Analysis { defining_opaque_types: _ } => {
ty.try_super_fold_with(self)?
}
Reveal::All => {
TypingMode::PostAnalysis => {
let args = data.args.try_fold_with(self)?;
let recursion_limit = self.cx().recursion_limit();
@ -332,7 +334,7 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for QueryNormalizer<'a, 'tcx> {
&mut self,
constant: ty::Const<'tcx>,
) -> Result<ty::Const<'tcx>, Self::Error> {
if !needs_normalization(&constant, self.param_env.reveal()) {
if !needs_normalization(self.infcx, self.param_env, &constant) {
return Ok(constant);
}
@ -351,7 +353,7 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for QueryNormalizer<'a, 'tcx> {
&mut self,
p: ty::Predicate<'tcx>,
) -> Result<ty::Predicate<'tcx>, Self::Error> {
if p.allow_normalization() && needs_normalization(&p, self.param_env.reveal()) {
if p.allow_normalization() && needs_normalization(self.infcx, self.param_env, &p) {
p.try_super_fold_with(self)
} else {
Ok(p)

7
compiler/rustc_type_ir/src/infer_ctxt.rs
View File

@ -12,6 +12,13 @@ use crate::{self as ty, Interner};
/// The current typing mode of an inference context. We unfortunately have some
/// slightly different typing rules depending on the current context. See the
/// doc comment for each variant for how and why they are used.
///
/// In most cases you can get the correct typing mode automically via:
/// - `mir::Body::typing_mode`
/// - `rustc_lint::LateContext::typing_mode`
///
/// If neither of these functions are available, feel free to reach out to
/// t-types for help.
#[derive_where(Clone, Copy, Hash, PartialEq, Eq, Debug; I: Interner)]
#[cfg_attr(feature = "nightly", derive(TyEncodable, TyDecodable, HashStable_NoContext))]
pub enum TypingMode<I: Interner> {

4
src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs
View File

@ -17,7 +17,7 @@ use rustc_middle::mir::{
};
use rustc_middle::traits::{BuiltinImplSource, ImplSource, ObligationCause};
use rustc_middle::ty::adjustment::PointerCoercion;
use rustc_middle::ty::{self, GenericArgKind, TraitRef, Ty, TyCtxt, TypingMode};
use rustc_middle::ty::{self, GenericArgKind, TraitRef, Ty, TyCtxt};
use rustc_span::Span;
use rustc_span::symbol::sym;
use rustc_trait_selection::traits::{ObligationCtxt, SelectionContext};
@ -420,7 +420,7 @@ fn is_ty_const_destruct<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, body: &Body<'tcx>
TraitRef::new(tcx, tcx.require_lang_item(LangItem::Destruct, Some(body.span)), [ty]),
);
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(obligation.param_env));
let infcx = tcx.infer_ctxt().build(body.typing_mode(tcx));
let mut selcx = SelectionContext::new(&infcx);
let Some(impl_src) = selcx.select(&obligation).ok().flatten() else {
return false;

2
src/tools/clippy/clippy_utils/src/ty.rs
View File

@ -362,7 +362,7 @@ fn is_normalizable_helper<'tcx>(
}
// prevent recursive loops, false-negative is better than endless loop leading to stack overflow
cache.insert(ty, false);
let infcx = cx.tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
let cause = ObligationCause::dummy();
let result = if infcx.at(&cause, param_env).query_normalize(ty).is_ok() {
match ty.kind() {