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Rollup merge of #115972 - RalfJung:const-consistency, r=oli-obk

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rename mir::Constant -> mir::ConstOperand, mir::ConstKind -> mir::Const

Also, be more consistent with the `to/eval_bits` methods... we had some that take a type and some that take a size, and then sometimes the one that takes a type is called `bits_for_ty`.

Turns out that `ty::Const`/`mir::ConstKind` carry their type with them, so we don't need to even pass the type to those `eval_bits` functions at all.

However this is not properly consistent yet: in `ty` we have most of the methods on `ty::Const`, but in `mir` we have them on `mir::ConstKind`. And indeed those two types are the ones that correspond to each other. So `mir::ConstantKind` should actually be renamed to `mir::Const`. But what to do with `mir::Constant`? It carries around a span, that's really more like a constant operand that appears as a MIR operand... it's more suited for `syntax.rs` than `consts.rs`, but the bigger question is, which name should it get if we want to align the `mir` and `ty` types? `ConstOperand`? `ConstOp`? `Literal`? It's not a literal but it has a field called `literal` so it would at least be consistently wrong-ish...

``@oli-obk`` any ideas?
This commit is contained in:
Guillaume Gomez 2023-09-21 13:25:39 +02:00 • committed by GitHub
commit 208f6ed95c
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76 changed files with 461 additions and 493 deletions
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6
compiler/rustc_borrowck/src/diagnostics/mod.rs
View file

@ -13,7 +13,7 @@ use rustc_index::IndexSlice;
use rustc_infer::infer::LateBoundRegionConversionTime;
use rustc_middle::mir::tcx::PlaceTy;
use rustc_middle::mir::{
AggregateKind, CallSource, Constant, FakeReadCause, Local, LocalInfo, LocalKind, Location,
AggregateKind, CallSource, ConstOperand, FakeReadCause, Local, LocalInfo, LocalKind, Location,
Operand, Place, PlaceRef, ProjectionElem, Rvalue, Statement, StatementKind, Terminator,
TerminatorKind,
};
@ -101,12 +101,12 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
let terminator = self.body[location.block].terminator();
debug!("add_moved_or_invoked_closure_note: terminator={:?}", terminator);
if let TerminatorKind::Call {
func: Operand::Constant(box Constant { literal, .. }),
func: Operand::Constant(box ConstOperand { const_, .. }),
args,
..
} = &terminator.kind
{
if let ty::FnDef(id, _) = *literal.ty().kind() {
if let ty::FnDef(id, _) = *const_.ty().kind() {
debug!("add_moved_or_invoked_closure_note: id={:?}", id);
if Some(self.infcx.tcx.parent(id)) == self.infcx.tcx.lang_items().fn_once_trait() {
let closure = match args.first() {

9
compiler/rustc_borrowck/src/renumber.rs
View file

@ -4,8 +4,7 @@ use crate::BorrowckInferCtxt;
use rustc_index::IndexSlice;
use rustc_infer::infer::NllRegionVariableOrigin;
use rustc_middle::mir::visit::{MutVisitor, TyContext};
use rustc_middle::mir::Constant;
use rustc_middle::mir::{Body, Location, Promoted};
use rustc_middle::mir::{Body, ConstOperand, Location, Promoted};
use rustc_middle::ty::GenericArgsRef;
use rustc_middle::ty::{self, Ty, TyCtxt, TypeFoldable};
use rustc_span::{Span, Symbol};
@ -117,9 +116,9 @@ impl<'a, 'tcx> MutVisitor<'tcx> for RegionRenumberer<'a, 'tcx> {
}
#[instrument(skip(self), level = "debug")]
fn visit_constant(&mut self, constant: &mut Constant<'tcx>, location: Location) {
let literal = constant.literal;
constant.literal = self.renumber_regions(literal, || RegionCtxt::Location(location));
fn visit_constant(&mut self, constant: &mut ConstOperand<'tcx>, location: Location) {
let const_ = constant.const_;
constant.const_ = self.renumber_regions(const_, || RegionCtxt::Location(location));
debug!("constant: {:#?}", constant);
}
}

28
compiler/rustc_borrowck/src/type_check/mod.rs
View file

@ -302,11 +302,11 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
self.sanitize_place(place, location, context);
}
fn visit_constant(&mut self, constant: &Constant<'tcx>, location: Location) {
fn visit_constant(&mut self, constant: &ConstOperand<'tcx>, location: Location) {
debug!(?constant, ?location, "visit_constant");
self.super_constant(constant, location);
let ty = self.sanitize_type(constant, constant.literal.ty());
let ty = self.sanitize_type(constant, constant.const_.ty());
self.cx.infcx.tcx.for_each_free_region(&ty, |live_region| {
let live_region_vid =
@ -328,7 +328,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
if let Some(annotation_index) = constant.user_ty {
if let Err(terr) = self.cx.relate_type_and_user_type(
constant.literal.ty(),
constant.const_.ty(),
ty::Variance::Invariant,
&UserTypeProjection { base: annotation_index, projs: vec![] },
locations,
@ -340,20 +340,20 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
constant,
"bad constant user type {:?} vs {:?}: {:?}",
annotation,
constant.literal.ty(),
constant.const_.ty(),
terr,
);
}
} else {
let tcx = self.tcx();
let maybe_uneval = match constant.literal {
ConstantKind::Ty(ct) => match ct.kind() {
let maybe_uneval = match constant.const_ {
Const::Ty(ct) => match ct.kind() {
ty::ConstKind::Unevaluated(_) => {
bug!("should not encounter unevaluated ConstantKind::Ty here, got {:?}", ct)
bug!("should not encounter unevaluated Const::Ty here, got {:?}", ct)
}
_ => None,
},
ConstantKind::Unevaluated(uv, _) => Some(uv),
Const::Unevaluated(uv, _) => Some(uv),
_ => None,
};
@ -384,7 +384,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
check_err(self, promoted_body, ty, promoted_ty);
} else {
self.cx.ascribe_user_type(
constant.literal.ty(),
constant.const_.ty(),
UserType::TypeOf(uv.def, UserArgs { args: uv.args, user_self_ty: None }),
locations.span(&self.cx.body),
);
@ -392,7 +392,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
} else if let Some(static_def_id) = constant.check_static_ptr(tcx) {
let unnormalized_ty = tcx.type_of(static_def_id).instantiate_identity();
let normalized_ty = self.cx.normalize(unnormalized_ty, locations);
let literal_ty = constant.literal.ty().builtin_deref(true).unwrap().ty;
let literal_ty = constant.const_.ty().builtin_deref(true).unwrap().ty;
if let Err(terr) = self.cx.eq_types(
literal_ty,
@ -404,7 +404,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
}
}
if let ty::FnDef(def_id, args) = *constant.literal.ty().kind() {
if let ty::FnDef(def_id, args) = *constant.const_.ty().kind() {
let instantiated_predicates = tcx.predicates_of(def_id).instantiate(tcx, args);
self.cx.normalize_and_prove_instantiated_predicates(
def_id,
@ -1801,9 +1801,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
debug!(?op, ?location, "check_operand");
if let Operand::Constant(constant) = op {
let maybe_uneval = match constant.literal {
ConstantKind::Val(..) | ConstantKind::Ty(_) => None,
ConstantKind::Unevaluated(uv, _) => Some(uv),
let maybe_uneval = match constant.const_ {
Const::Val(..) | Const::Ty(_) => None,
Const::Unevaluated(uv, _) => Some(uv),
};
if let Some(uv) = maybe_uneval {