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Merge two arguments into one

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This commit is contained in:
Oli Scherer 2022-09-13 08:51:45 +00:00
parent 22f6aec42d
commit 5d664f7a8f
11 changed files with 92 additions and 127 deletions
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58
compiler/rustc_mir_build/src/build/expr/as_place.rs
View file

@ -69,7 +69,7 @@ pub(crate) enum PlaceBase {
/// This is used internally when building a place for an expression like `a.b.c`. The fields `b`
/// and `c` can be progressively pushed onto the place builder that is created when converting `a`.
#[derive(Clone, Debug, PartialEq)]
pub(crate) struct PlaceBuilder<'tcx> {
pub(in crate::build) struct PlaceBuilder<'tcx> {
base: PlaceBase,
projection: Vec<PlaceElem<'tcx>>,
}
@ -168,22 +168,22 @@ fn find_capture_matching_projections<'a, 'tcx>(
/// `PlaceBuilder` now starts from `PlaceBase::Local`.
///
/// Returns a Result with the error being the PlaceBuilder (`from_builder`) that was not found.
fn to_upvars_resolved_place_builder<'a, 'tcx>(
#[instrument(level = "trace", skip(cx))]
fn to_upvars_resolved_place_builder<'tcx>(
from_builder: PlaceBuilder<'tcx>,
tcx: TyCtxt<'tcx>,
upvars: &'a CaptureMap<'tcx>,
cx: &Builder<'_, 'tcx>,
) -> Result<PlaceBuilder<'tcx>, PlaceBuilder<'tcx>> {
match from_builder.base {
PlaceBase::Local(_) => Ok(from_builder),
PlaceBase::Upvar { var_hir_id, closure_def_id } => {
let Some((capture_index, capture)) =
find_capture_matching_projections(
upvars,
&cx.upvars,
var_hir_id,
&from_builder.projection,
) else {
let closure_span = tcx.def_span(closure_def_id);
if !enable_precise_capture(tcx, closure_span) {
let closure_span = cx.tcx.def_span(closure_def_id);
if !enable_precise_capture(cx.tcx, closure_span) {
bug!(
"No associated capture found for {:?}[{:#?}] even though \
capture_disjoint_fields isn't enabled",
@ -200,18 +200,20 @@ fn to_upvars_resolved_place_builder<'a, 'tcx>(
};
// Access the capture by accessing the field within the Closure struct.
let capture_info = &upvars[capture_index];
let capture_info = &cx.upvars[capture_index];
let mut upvar_resolved_place_builder = PlaceBuilder::from(capture_info.use_place);
// We used some of the projections to build the capture itself,
// now we apply the remaining to the upvar resolved place.
trace!(?capture.captured_place, ?from_builder.projection);
let remaining_projections = strip_prefix(
capture.captured_place.place.base_ty,
from_builder.projection,
&capture.captured_place.place.projections,
);
upvar_resolved_place_builder.projection.extend(remaining_projections);
trace!(?upvar_resolved_place_builder);
Ok(upvar_resolved_place_builder)
}
@ -251,24 +253,16 @@ fn strip_prefix<'tcx>(
}
impl<'tcx> PlaceBuilder<'tcx> {
pub(in crate::build) fn into_place<'a>(
self,
tcx: TyCtxt<'tcx>,
upvars: &'a CaptureMap<'tcx>,
) -> Place<'tcx> {
pub(in crate::build) fn into_place(self, cx: &Builder<'_, 'tcx>) -> Place<'tcx> {
if let PlaceBase::Local(local) = self.base {
Place { local, projection: tcx.intern_place_elems(&self.projection) }
Place { local, projection: cx.tcx.intern_place_elems(&self.projection) }
} else {
self.expect_upvars_resolved(tcx, upvars).into_place(tcx, upvars)
self.expect_upvars_resolved(cx).into_place(cx)
}
}
fn expect_upvars_resolved<'a>(
self,
tcx: TyCtxt<'tcx>,
upvars: &'a CaptureMap<'tcx>,
) -> PlaceBuilder<'tcx> {
to_upvars_resolved_place_builder(self, tcx, upvars).unwrap()
fn expect_upvars_resolved(self, cx: &Builder<'_, 'tcx>) -> PlaceBuilder<'tcx> {
to_upvars_resolved_place_builder(self, cx).unwrap()
}
/// Attempts to resolve the `PlaceBuilder`.
@ -282,12 +276,11 @@ impl<'tcx> PlaceBuilder<'tcx> {
/// not captured. This can happen because the final mir that will be
/// generated doesn't require a read for this place. Failures will only
/// happen inside closures.
pub(in crate::build) fn try_upvars_resolved<'a>(
pub(in crate::build) fn try_upvars_resolved(
self,
tcx: TyCtxt<'tcx>,
upvars: &'a CaptureMap<'tcx>,
cx: &Builder<'_, 'tcx>,
) -> Result<PlaceBuilder<'tcx>, PlaceBuilder<'tcx>> {
to_upvars_resolved_place_builder(self, tcx, upvars)
to_upvars_resolved_place_builder(self, cx)
}
pub(crate) fn base(&self) -> PlaceBase {
@ -353,7 +346,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
expr: &Expr<'tcx>,
) -> BlockAnd<Place<'tcx>> {
let place_builder = unpack!(block = self.as_place_builder(block, expr));
block.and(place_builder.into_place(self.tcx, &self.upvars))
block.and(place_builder.into_place(self))
}
/// This is used when constructing a compound `Place`, so that we can avoid creating
@ -377,7 +370,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
expr: &Expr<'tcx>,
) -> BlockAnd<Place<'tcx>> {
let place_builder = unpack!(block = self.as_read_only_place_builder(block, expr));
block.and(place_builder.into_place(self.tcx, &self.upvars))
block.and(place_builder.into_place(self))
}
/// This is used when constructing a compound `Place`, so that we can avoid creating
@ -472,7 +465,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
inferred_ty: expr.ty,
});
let place = place_builder.clone().into_place(this.tcx, &this.upvars);
let place = place_builder.clone().into_place(this);
this.cfg.push(
block,
Statement {
@ -610,7 +603,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
if is_outermost_index {
self.read_fake_borrows(block, fake_borrow_temps, source_info)
} else {
base_place = base_place.expect_upvars_resolved(self.tcx, &self.upvars);
base_place = base_place.expect_upvars_resolved(self);
self.add_fake_borrows_of_base(
&base_place,
block,
@ -638,12 +631,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
let lt = self.temp(bool_ty, expr_span);
// len = len(slice)
self.cfg.push_assign(
block,
source_info,
len,
Rvalue::Len(slice.into_place(self.tcx, &self.upvars)),
);
self.cfg.push_assign(block, source_info, len, Rvalue::Len(slice.into_place(self)));
// lt = idx < len
self.cfg.push_assign(
block,

11
compiler/rustc_mir_build/src/build/expr/as_rvalue.rs
View file

@ -329,10 +329,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
let place_builder =
unpack!(block = this.as_place_builder(block, &this.thir[*thir_place]));
if let Ok(place_builder_resolved) =
place_builder.try_upvars_resolved(this.tcx, &this.upvars)
{
let mir_place = place_builder_resolved.into_place(this.tcx, &this.upvars);
if let Ok(place_builder_resolved) = place_builder.try_upvars_resolved(this) {
let mir_place = place_builder_resolved.into_place(this);
this.cfg.push_fake_read(
block,
this.source_info(this.tcx.hir().span(*hir_id)),
@ -623,8 +621,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
// by the parent itself. The mutability of the current capture
// is same as that of the capture in the parent closure.
PlaceBase::Upvar { .. } => {
let enclosing_upvars_resolved =
arg_place_builder.clone().into_place(this.tcx, &this.upvars);
let enclosing_upvars_resolved = arg_place_builder.clone().into_place(this);
match enclosing_upvars_resolved.as_ref() {
PlaceRef {
@ -661,7 +658,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
Mutability::Mut => BorrowKind::Mut { allow_two_phase_borrow: false },
};
let arg_place = arg_place_builder.into_place(this.tcx, &this.upvars);
let arg_place = arg_place_builder.into_place(this);
this.cfg.push_assign(
block,

5
compiler/rustc_mir_build/src/build/expr/as_temp.rs
View file

@ -23,6 +23,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
ensure_sufficient_stack(|| self.as_temp_inner(block, temp_lifetime, expr, mutability))
}
#[instrument(skip(self), level = "debug")]
fn as_temp_inner(
&mut self,
mut block: BasicBlock,
@ -30,10 +31,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
expr: &Expr<'tcx>,
mutability: Mutability,
) -> BlockAnd<Local> {
debug!(
"as_temp(block={:?}, temp_lifetime={:?}, expr={:?}, mutability={:?})",
block, temp_lifetime, expr, mutability
);
let this = self;
let expr_span = expr.span;

5
compiler/rustc_mir_build/src/build/expr/into.rs
View file

@ -15,14 +15,13 @@ use std::iter;
impl<'a, 'tcx> Builder<'a, 'tcx> {
/// Compile `expr`, storing the result into `destination`, which
/// is assumed to be uninitialized.
#[instrument(level = "debug", skip(self))]
pub(crate) fn expr_into_dest(
&mut self,
destination: Place<'tcx>,
mut block: BasicBlock,
expr: &Expr<'tcx>,
) -> BlockAnd<()> {
debug!("expr_into_dest(destination={:?}, block={:?}, expr={:?})", destination, block, expr);
// since we frequently have to reference `self` from within a
// closure, where `self` would be shadowed, it's easier to
// just use the name `this` uniformly
@ -366,7 +365,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
None => {
let place_builder = place_builder.clone();
this.consume_by_copy_or_move(
place_builder.field(n, *ty).into_place(this.tcx, &this.upvars),
place_builder.field(n, *ty).into_place(this),
)
}
})

73
compiler/rustc_mir_build/src/build/matches/mod.rs
View file

@ -220,10 +220,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
let cause_matched_place = FakeReadCause::ForMatchedPlace(None);
let source_info = self.source_info(scrutinee_span);
if let Ok(scrutinee_builder) =
scrutinee_place_builder.clone().try_upvars_resolved(self.tcx, &self.upvars)
{
let scrutinee_place = scrutinee_builder.into_place(self.tcx, &self.upvars);
if let Ok(scrutinee_builder) = scrutinee_place_builder.clone().try_upvars_resolved(self) {
let scrutinee_place = scrutinee_builder.into_place(self);
self.cfg.push_fake_read(block, source_info, cause_matched_place, scrutinee_place);
}
@ -349,9 +347,9 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
let mut opt_scrutinee_place: Option<(Option<&Place<'tcx>>, Span)> = None;
let scrutinee_place: Place<'tcx>;
if let Ok(scrutinee_builder) =
scrutinee_place_builder.clone().try_upvars_resolved(this.tcx, &this.upvars)
scrutinee_place_builder.clone().try_upvars_resolved(this)
{
scrutinee_place = scrutinee_builder.into_place(this.tcx, &this.upvars);
scrutinee_place = scrutinee_builder.into_place(this);
opt_scrutinee_place = Some((Some(&scrutinee_place), scrutinee_span));
}
let scope = this.declare_bindings(
@ -597,12 +595,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
while let Some(next) = {
for binding in &candidate_ref.bindings {
let local = self.var_local_id(binding.var_id, OutsideGuard);
let Some(box LocalInfo::User(ClearCrossCrate::Set(BindingForm::Var(
VarBindingForm { opt_match_place: Some((ref mut match_place, _)), .. },
)))) = self.local_decls[local].local_info else {
bug!("Let binding to non-user variable.")
};
// `try_upvars_resolved` may fail if it is unable to resolve the given
// `PlaceBuilder` inside a closure. In this case, we don't want to include
// a scrutinee place. `scrutinee_place_builder` will fail for destructured
@ -617,10 +609,14 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
// let (v1, v2) = foo;
// };
// ```
if let Ok(match_pair_resolved) =
initializer.clone().try_upvars_resolved(self.tcx, &self.upvars)
{
let place = match_pair_resolved.into_place(self.tcx, &self.upvars);
if let Ok(match_pair_resolved) = initializer.clone().try_upvars_resolved(self) {
let place = match_pair_resolved.into_place(self);
let Some(box LocalInfo::User(ClearCrossCrate::Set(BindingForm::Var(
VarBindingForm { opt_match_place: Some((ref mut match_place, _)), .. },
)))) = self.local_decls[local].local_info else {
bug!("Let binding to non-user variable.")
};
*match_place = Some(place);
}
}
@ -649,6 +645,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
/// scope for the bindings in these patterns, if such a scope had to be
/// created. NOTE: Declaring the bindings should always be done in their
/// drop scope.
#[instrument(skip(self), level = "debug")]
pub(crate) fn declare_bindings(
&mut self,
mut visibility_scope: Option<SourceScope>,
@ -657,7 +654,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
has_guard: ArmHasGuard,
opt_match_place: Option<(Option<&Place<'tcx>>, Span)>,
) -> Option<SourceScope> {
debug!("declare_bindings: pattern={:?}", pattern);
self.visit_primary_bindings(
&pattern,
UserTypeProjections::none(),
@ -867,7 +863,7 @@ impl<'tcx, 'pat> Candidate<'pat, 'tcx> {
Candidate {
span: pattern.span,
has_guard,
match_pairs: smallvec![MatchPair { place, pattern }],
match_pairs: smallvec![MatchPair::new(place, pattern)],
bindings: Vec::new(),
ascriptions: Vec::new(),
subcandidates: Vec::new(),
@ -1043,6 +1039,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
/// if `x.0` matches `false` (for the third arm). In the (impossible at
/// runtime) case when `x.0` is now `true`, we branch to
/// `otherwise_block`.
#[instrument(skip(self, fake_borrows), level = "debug")]
fn match_candidates<'pat>(
&mut self,
span: Span,
@ -1052,11 +1049,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
candidates: &mut [&mut Candidate<'pat, 'tcx>],
fake_borrows: &mut Option<FxIndexSet<Place<'tcx>>>,
) {
debug!(
"matched_candidate(span={:?}, candidates={:?}, start_block={:?}, otherwise_block={:?})",
span, candidates, start_block, otherwise_block,
);
// Start by simplifying candidates. Once this process is complete, all
// the match pairs which remain require some form of test, whether it
// be a switch or pattern comparison.
@ -1375,6 +1367,10 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
)
}
#[instrument(
skip(self, otherwise, or_span, place, fake_borrows, candidate, pats),
level = "debug"
)]
fn test_or_pattern<'pat>(
&mut self,
candidate: &mut Candidate<'pat, 'tcx>,
@ -1384,7 +1380,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
place: PlaceBuilder<'tcx>,
fake_borrows: &mut Option<FxIndexSet<Place<'tcx>>>,
) {
debug!("test_or_pattern:\ncandidate={:#?}\npats={:#?}", candidate, pats);
debug!("candidate={:#?}\npats={:#?}", candidate, pats);
let mut or_candidates: Vec<_> = pats
.iter()
.map(|pat| Candidate::new(place.clone(), pat, candidate.has_guard))
@ -1600,9 +1596,9 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
// Insert a Shallow borrow of any places that is switched on.
if let Some(fb) = fake_borrows && let Ok(match_place_resolved) =
match_place.clone().try_upvars_resolved(self.tcx, &self.upvars)
match_place.clone().try_upvars_resolved(self)
{
let resolved_place = match_place_resolved.into_place(self.tcx, &self.upvars);
let resolved_place = match_place_resolved.into_place(self);
fb.insert(resolved_place);
}
@ -1629,9 +1625,14 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
candidates = rest;
}
// at least the first candidate ought to be tested
assert!(total_candidate_count > candidates.len());
debug!("test_candidates: tested_candidates: {}", total_candidate_count - candidates.len());
debug!("test_candidates: untested_candidates: {}", candidates.len());
assert!(
total_candidate_count > candidates.len(),
"{}, {:#?}",
total_candidate_count,
candidates
);
debug!("tested_candidates: {}", total_candidate_count - candidates.len());
debug!("untested_candidates: {}", candidates.len());
// HACK(matthewjasper) This is a closure so that we can let the test
// create its blocks before the rest of the match. This currently
@ -1789,8 +1790,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
);
let mut opt_expr_place: Option<(Option<&Place<'tcx>>, Span)> = None;
let expr_place: Place<'tcx>;
if let Ok(expr_builder) = expr_place_builder.try_upvars_resolved(self.tcx, &self.upvars) {
expr_place = expr_builder.into_place(self.tcx, &self.upvars);
if let Ok(expr_builder) = expr_place_builder.try_upvars_resolved(self) {
expr_place = expr_builder.into_place(self);
opt_expr_place = Some((Some(&expr_place), expr_span));
}
let otherwise_post_guard_block = otherwise_candidate.pre_binding_block.unwrap();
@ -2188,6 +2189,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
/// first local is a binding for occurrences of `var` in the guard, which
/// will have type `&T`. The second local is a binding for occurrences of
/// `var` in the arm body, which will have type `T`.
#[instrument(skip(self), level = "debug")]
fn declare_binding(
&mut self,
source_info: SourceInfo,
@ -2202,19 +2204,12 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
opt_match_place: Option<(Option<Place<'tcx>>, Span)>,
pat_span: Span,
) {
debug!(
"declare_binding(var_id={:?}, name={:?}, mode={:?}, var_ty={:?}, \
visibility_scope={:?}, source_info={:?})",
var_id, name, mode, var_ty, visibility_scope, source_info
);
let tcx = self.tcx;
let debug_source_info = SourceInfo { span: source_info.span, scope: visibility_scope };
let binding_mode = match mode {
BindingMode::ByValue => ty::BindingMode::BindByValue(mutability),
BindingMode::ByRef(_) => ty::BindingMode::BindByReference(mutability),
};
debug!("declare_binding: user_ty={:?}", user_ty);
let local = LocalDecl::<'tcx> {
mutability,
ty: var_ty,
@ -2264,7 +2259,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
} else {
LocalsForNode::One(for_arm_body)
};
debug!("declare_binding: vars={:?}", locals);
debug!(?locals);
self.var_indices.insert(var_id, locals);
}

15
compiler/rustc_mir_build/src/build/matches/simplify.rs
View file

@ -37,12 +37,13 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
///
/// only generates a single switch. If this happens this method returns
/// `true`.
#[instrument(skip(self, candidate), level = "debug")]
pub(super) fn simplify_candidate<'pat>(
&mut self,
candidate: &mut Candidate<'pat, 'tcx>,
) -> bool {
// repeatedly simplify match pairs until fixed point is reached
debug!(?candidate, "simplify_candidate");
debug!("{candidate:#?}");
// existing_bindings and new_bindings exists to keep the semantics in order.
// Reversing the binding order for bindings after `@` changes the binding order in places
@ -155,12 +156,10 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
ascription: thir::Ascription { ref annotation, variance },
} => {
// Apply the type ascription to the value at `match_pair.place`, which is the
if let Ok(place_resolved) =
match_pair.place.clone().try_upvars_resolved(self.tcx, &self.upvars)
{
if let Ok(place_resolved) = match_pair.place.clone().try_upvars_resolved(self) {
candidate.ascriptions.push(Ascription {
annotation: annotation.clone(),
source: place_resolved.into_place(self.tcx, &self.upvars),
source: place_resolved.into_place(self),
variance,
});
}
@ -184,12 +183,10 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
ref subpattern,
is_primary: _,
} => {
if let Ok(place_resolved) =
match_pair.place.clone().try_upvars_resolved(self.tcx, &self.upvars)
{
if let Ok(place_resolved) = match_pair.place.clone().try_upvars_resolved(self) {
candidate.bindings.push(Binding {
span: match_pair.pattern.span,
source: place_resolved.into_place(self.tcx, &self.upvars),
source: place_resolved.into_place(self),
var_id: var,
binding_mode: mode,
});

21
compiler/rustc_mir_build/src/build/matches/test.rs
View file

@ -144,6 +144,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}
}
#[instrument(skip(self, make_target_blocks, place_builder), level = "debug")]
pub(super) fn perform_test(
&mut self,
match_start_span: Span,
@ -153,19 +154,9 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
test: &Test<'tcx>,
make_target_blocks: impl FnOnce(&mut Self) -> Vec<BasicBlock>,
) {
let place: Place<'tcx>;
if let Ok(test_place_builder) = place_builder.try_upvars_resolved(self.tcx, &self.upvars) {
place = test_place_builder.into_place(self.tcx, &self.upvars);
} else {
return;
}
debug!(
"perform_test({:?}, {:?}: {:?}, {:?})",
block,
place,
place.ty(&self.local_decls, self.tcx),
test
);
let place = place_builder.into_place(self);
let place_ty = place.ty(&self.local_decls, self.tcx);
debug!(?place, ?place_ty,);
let source_info = self.source_info(test.span);
match test.kind {
@ -733,9 +724,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
// So, if we have a match-pattern like `x @ Enum::Variant(P1, P2)`,
// we want to create a set of derived match-patterns like
// `(x as Variant).0 @ P1` and `(x as Variant).1 @ P1`.
let elem =
ProjectionElem::Downcast(Some(adt_def.variant(variant_index).name), variant_index);
let downcast_place = match_pair.place.project(elem); // `(x as Variant)`
let downcast_place = match_pair.place.downcast(adt_def, variant_index); // `(x as Variant)`
let consequent_match_pairs = subpatterns.iter().map(|subpattern| {
// e.g., `(x as Variant).0`
let place = downcast_place.clone().field(subpattern.field, subpattern.pattern.ty);

22
compiler/rustc_mir_build/src/build/matches/util.rs
View file

@ -31,17 +31,15 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
suffix: &'pat [Box<Pat<'tcx>>],
) {
let tcx = self.tcx;
let (min_length, exact_size) = if let Ok(place_resolved) =
place.clone().try_upvars_resolved(tcx, &self.upvars)
{
match place_resolved.into_place(tcx, &self.upvars).ty(&self.local_decls, tcx).ty.kind()
{
ty::Array(_, length) => (length.eval_usize(tcx, self.param_env), true),
_ => ((prefix.len() + suffix.len()).try_into().unwrap(), false),
}
} else {
((prefix.len() + suffix.len()).try_into().unwrap(), false)
};
let (min_length, exact_size) =
if let Ok(place_resolved) = place.clone().try_upvars_resolved(self) {
match place_resolved.into_place(self).ty(&self.local_decls, tcx).ty.kind() {
ty::Array(_, length) => (length.eval_usize(tcx, self.param_env), true),
_ => ((prefix.len() + suffix.len()).try_into().unwrap(), false),
}
} else {
((prefix.len() + suffix.len()).try_into().unwrap(), false)
};
match_pairs.extend(prefix.iter().enumerate().map(|(idx, subpattern)| {
let elem =
@ -96,7 +94,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}
impl<'pat, 'tcx> MatchPair<'pat, 'tcx> {
pub(crate) fn new(
pub(in crate::build) fn new(
place: PlaceBuilder<'tcx>,
pattern: &'pat Pat<'tcx>,
) -> MatchPair<'pat, 'tcx> {

4
compiler/rustc_mir_build/src/build/scope.rs
View file

@ -553,6 +553,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
/// Convenience wrapper that pushes a scope and then executes `f`
/// to build its contents, popping the scope afterwards.
#[instrument(skip(self, f), level = "debug")]
pub(crate) fn in_scope<F, R>(
&mut self,
region_scope: (region::Scope, SourceInfo),
@ -562,7 +563,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
where
F: FnOnce(&mut Builder<'a, 'tcx>) -> BlockAnd<R>,
{
debug!("in_scope(region_scope={:?})", region_scope);
let source_scope = self.source_scope;
let tcx = self.tcx;
if let LintLevel::Explicit(current_hir_id) = lint_level {
@ -589,7 +589,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
let rv = unpack!(block = f(self));
unpack!(block = self.pop_scope(region_scope, block));
self.source_scope = source_scope;
debug!("in_scope: exiting region_scope={:?} block={:?}", region_scope, block);
debug!(?block);
block.and(rv)
}

4
compiler/rustc_mir_build/src/thir/cx/expr.rs
View file

@ -48,6 +48,8 @@ impl<'tcx> Cx<'tcx> {
_ => None,
};
trace!(?expr.ty);
// Now apply adjustments, if any.
for adjustment in self.typeck_results.expr_adjustments(hir_expr) {
trace!(?expr, ?adjustment);
@ -56,6 +58,8 @@ impl<'tcx> Cx<'tcx> {
self.apply_adjustment(hir_expr, expr, adjustment, adjustment_span.unwrap_or(span));
}
trace!(?expr.ty, "after adjustments");
// Next, wrap this up in the expr's scope.
expr = Expr {
temp_lifetime,

1
compiler/rustc_mir_build/src/thir/pattern/mod.rs
View file

@ -200,6 +200,7 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
}
}
#[instrument(skip(self), level = "debug")]
fn lower_pattern_unadjusted(&mut self, pat: &'tcx hir::Pat<'tcx>) -> Box<Pat<'tcx>> {
let mut ty = self.typeck_results.node_type(pat.hir_id);
let mut span = pat.span;