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Rollup merge of #126410 - RalfJung:smir-const-operand, r=oli-obk

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smir: merge identical Constant and ConstOperand types

The first commit renames the const operand visitor functions on regular MIR to match the type name, that was forgotten in the original rename.

The second commit changes stable MIR, fixing https://github.com/rust-lang/project-stable-mir/issues/71. Previously there were two different smir types for the MIR type `ConstOperand`, one used in `Operand` and one in `VarDebugInfoContents`.

Maybe we should have done this with https://github.com/rust-lang/rust/pull/125967, so there's only a single breaking change... but I saw that PR too late.

Fixes https://github.com/rust-lang/project-stable-mir/issues/71
This commit is contained in:
Guillaume Gomez 2024-06-15 19:51:35 +02:00 committed by GitHub
commit be1d42776d
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GPG Key ID: B5690EEEBB952194
16 changed files with 52 additions and 55 deletions
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2
compiler/rustc_borrowck/src/renumber.rs
View File

@ -113,7 +113,7 @@ impl<'a, 'tcx> MutVisitor<'tcx> for RegionRenumberer<'a, 'tcx> {
}
#[instrument(skip(self), level = "debug")]
fn visit_constant(&mut self, constant: &mut ConstOperand<'tcx>, location: Location) {
fn visit_const_operand(&mut self, constant: &mut ConstOperand<'tcx>, location: Location) {
let const_ = constant.const_;
constant.const_ = self.renumber_regions(const_, || RegionCtxt::Location(location));
debug!("constant: {:#?}", constant);

6
compiler/rustc_borrowck/src/type_check/mod.rs
View File

@ -301,10 +301,10 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
self.sanitize_place(place, location, context);
}
fn visit_constant(&mut self, constant: &ConstOperand<'tcx>, location: Location) {
debug!(?constant, ?location, "visit_constant");
fn visit_const_operand(&mut self, constant: &ConstOperand<'tcx>, location: Location) {
debug!(?constant, ?location, "visit_const_operand");
self.super_constant(constant, location);
self.super_const_operand(constant, location);
let ty = self.sanitize_type(constant, constant.const_.ty());
self.cx.infcx.tcx.for_each_free_region(&ty, |live_region| {

4
compiler/rustc_middle/src/mir/pretty.rs
View File

@ -1287,7 +1287,7 @@ fn use_verbose(ty: Ty<'_>, fn_def: bool) -> bool {
}
impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> {
fn visit_constant(&mut self, constant: &ConstOperand<'tcx>, _location: Location) {
fn visit_const_operand(&mut self, constant: &ConstOperand<'tcx>, _location: Location) {
let ConstOperand { span, user_ty, const_ } = constant;
if use_verbose(const_.ty(), true) {
self.push("mir::ConstOperand");
@ -1415,7 +1415,7 @@ pub fn write_allocations<'tcx>(
struct CollectAllocIds(BTreeSet<AllocId>);
impl<'tcx> Visitor<'tcx> for CollectAllocIds {
fn visit_constant(&mut self, c: &ConstOperand<'tcx>, _: Location) {
fn visit_const_operand(&mut self, c: &ConstOperand<'tcx>, _: Location) {
match c.const_ {
Const::Ty(_, _) | Const::Unevaluated(..) => {}
Const::Val(val, _) => {

14
compiler/rustc_middle/src/mir/visit.rs
View File

@ -184,12 +184,12 @@ macro_rules! make_mir_visitor {
/// This is called for every constant in the MIR body and every `required_consts`
/// (i.e., including consts that have been dead-code-eliminated).
fn visit_constant(
fn visit_const_operand(
&mut self,
constant: & $($mutability)? ConstOperand<'tcx>,
location: Location,
) {
self.super_constant(constant, location);
self.super_const_operand(constant, location);
}
fn visit_ty_const(
@ -597,7 +597,7 @@ macro_rules! make_mir_visitor {
}
InlineAsmOperand::Const { value }
| InlineAsmOperand::SymFn { value } => {
self.visit_constant(value, location);
self.visit_const_operand(value, location);
}
InlineAsmOperand::Out { place: None, .. }
| InlineAsmOperand::SymStatic { def_id: _ }
@ -788,7 +788,7 @@ macro_rules! make_mir_visitor {
);
}
Operand::Constant(constant) => {
self.visit_constant(constant, location);
self.visit_const_operand(constant, location);
}
}
}
@ -867,7 +867,7 @@ macro_rules! make_mir_visitor {
}
}
match value {
VarDebugInfoContents::Const(c) => self.visit_constant(c, location),
VarDebugInfoContents::Const(c) => self.visit_const_operand(c, location),
VarDebugInfoContents::Place(place) =>
self.visit_place(
place,
@ -882,7 +882,7 @@ macro_rules! make_mir_visitor {
_scope: $(& $mutability)? SourceScope
) {}
fn super_constant(
fn super_const_operand(
&mut self,
constant: & $($mutability)? ConstOperand<'tcx>,
location: Location
@ -1057,7 +1057,7 @@ macro_rules! super_body {
for const_ in &$($mutability)? $body.required_consts {
let location = Location::START;
$self.visit_constant(const_, location);
$self.visit_const_operand(const_, location);
}
}
}

6
compiler/rustc_mir_transform/src/known_panics_lint.rs
View File

@ -706,9 +706,9 @@ impl<'tcx> Visitor<'tcx> for ConstPropagator<'_, 'tcx> {
self.super_operand(operand, location);
}
fn visit_constant(&mut self, constant: &ConstOperand<'tcx>, location: Location) {
trace!("visit_constant: {:?}", constant);
self.super_constant(constant, location);
fn visit_const_operand(&mut self, constant: &ConstOperand<'tcx>, location: Location) {
trace!("visit_const_operand: {:?}", constant);
self.super_const_operand(constant, location);
self.eval_constant(constant);
}

2
compiler/rustc_mir_transform/src/promote_consts.rs
View File

@ -956,7 +956,7 @@ impl<'a, 'tcx> MutVisitor<'tcx> for Promoter<'a, 'tcx> {
}
}
fn visit_constant(&mut self, constant: &mut ConstOperand<'tcx>, _location: Location) {
fn visit_const_operand(&mut self, constant: &mut ConstOperand<'tcx>, _location: Location) {
if constant.const_.is_required_const() {
self.promoted.required_consts.push(*constant);
}

2
compiler/rustc_mir_transform/src/required_consts.rs
View File

@ -12,7 +12,7 @@ impl<'a, 'tcx> RequiredConstsVisitor<'a, 'tcx> {
}
impl<'tcx> Visitor<'tcx> for RequiredConstsVisitor<'_, 'tcx> {
fn visit_constant(&mut self, constant: &ConstOperand<'tcx>, _: Location) {
fn visit_const_operand(&mut self, constant: &ConstOperand<'tcx>, _: Location) {
if constant.const_.is_required_const() {
self.required_consts.push(*constant);
}

4
compiler/rustc_mir_transform/src/reveal_all.rs
View File

@ -49,14 +49,14 @@ impl<'tcx> MutVisitor<'tcx> for RevealAllVisitor<'tcx> {
}
#[inline]
fn visit_constant(&mut self, constant: &mut ConstOperand<'tcx>, location: Location) {
fn visit_const_operand(&mut self, constant: &mut ConstOperand<'tcx>, location: Location) {
// We have to use `try_normalize_erasing_regions` here, since it's
// possible that we visit impossible-to-satisfy where clauses here,
// see #91745
if let Ok(c) = self.tcx.try_normalize_erasing_regions(self.param_env, constant.const_) {
constant.const_ = c;
}
self.super_constant(constant, location);
self.super_const_operand(constant, location);
}
#[inline]

2
compiler/rustc_monomorphize/src/collector.rs
View File

@ -799,7 +799,7 @@ impl<'a, 'tcx> MirVisitor<'tcx> for MirUsedCollector<'a, 'tcx> {
/// This does not walk the MIR of the constant as that is not needed for codegen, all we need is
/// to ensure that the constant evaluates successfully and walk the result.
#[instrument(skip(self), level = "debug")]
fn visit_constant(&mut self, constant: &mir::ConstOperand<'tcx>, location: Location) {
fn visit_const_operand(&mut self, constant: &mir::ConstOperand<'tcx>, location: Location) {
// No `super_constant` as we don't care about `visit_ty`/`visit_ty_const`.
let Some(val) = self.eval_constant(constant) else { return };
collect_const_value(self.tcx, val, self.used_items);

2
compiler/rustc_monomorphize/src/polymorphize.rs
View File

@ -261,7 +261,7 @@ impl<'a, 'tcx> Visitor<'tcx> for MarkUsedGenericParams<'a, 'tcx> {
self.super_local_decl(local, local_decl);
}
fn visit_constant(&mut self, ct: &mir::ConstOperand<'tcx>, location: Location) {
fn visit_const_operand(&mut self, ct: &mir::ConstOperand<'tcx>, location: Location) {
match ct.const_ {
mir::Const::Ty(_, c) => {
c.visit_with(self);

8
compiler/rustc_smir/src/rustc_smir/builder.rs
View File

@ -52,7 +52,11 @@ impl<'tcx> BodyBuilder<'tcx> {
}
impl<'tcx> MutVisitor<'tcx> for BodyBuilder<'tcx> {
fn visit_constant(&mut self, constant: &mut mir::ConstOperand<'tcx>, location: mir::Location) {
fn visit_const_operand(
&mut self,
constant: &mut mir::ConstOperand<'tcx>,
location: mir::Location,
) {
let const_ = constant.const_;
let val = match const_.eval(self.tcx, ty::ParamEnv::reveal_all(), constant.span) {
Ok(v) => v,
@ -63,7 +67,7 @@ impl<'tcx> MutVisitor<'tcx> for BodyBuilder<'tcx> {
};
let ty = constant.ty();
constant.const_ = mir::Const::Val(val, ty);
self.super_constant(constant, location);
self.super_const_operand(constant, location);
}
fn tcx(&self) -> TyCtxt<'tcx> {

6
compiler/rustc_smir/src/rustc_smir/convert/mir.rs
View File

@ -328,13 +328,13 @@ impl<'tcx> Stable<'tcx> for mir::Operand<'tcx> {
}
impl<'tcx> Stable<'tcx> for mir::ConstOperand<'tcx> {
type T = stable_mir::mir::Constant;
type T = stable_mir::mir::ConstOperand;
fn stable(&self, tables: &mut Tables<'_>) -> Self::T {
stable_mir::mir::Constant {
stable_mir::mir::ConstOperand {
span: self.span.stable(tables),
user_ty: self.user_ty.map(|u| u.as_usize()).or(None),
literal: self.const_.stable(tables),
const_: self.const_.stable(tables),
}
}
}

27
compiler/stable_mir/src/mir/body.rs
View File

@ -637,7 +637,7 @@ pub enum AggregateKind {
pub enum Operand {
Copy(Place),
Move(Place),
Constant(Constant),
Constant(ConstOperand),
}
#[derive(Clone, Eq, PartialEq)]
@ -653,6 +653,13 @@ impl From<Local> for Place {
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct ConstOperand {
pub span: Span,
pub user_ty: Option<UserTypeAnnotationIndex>,
pub const_: MirConst,
}
/// Debug information pertaining to a user variable.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct VarDebugInfo {
@ -714,13 +721,6 @@ pub enum VarDebugInfoContents {
Const(ConstOperand),
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct ConstOperand {
pub span: Span,
pub user_ty: Option<UserTypeAnnotationIndex>,
pub const_: MirConst,
}
// In MIR ProjectionElem is parameterized on the second Field argument and the Index argument. This
// is so it can be used for both Places (for which the projection elements are of type
// ProjectionElem<Local, Ty>) and user-provided type annotations (for which the projection elements
@ -829,13 +829,6 @@ pub type FieldIdx = usize;
type UserTypeAnnotationIndex = usize;
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Constant {
pub span: Span,
pub user_ty: Option<UserTypeAnnotationIndex>,
pub literal: MirConst,
}
/// The possible branch sites of a [TerminatorKind::SwitchInt].
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct SwitchTargets {
@ -1001,9 +994,9 @@ impl Operand {
}
}
impl Constant {
impl ConstOperand {
pub fn ty(&self) -> Ty {
self.literal.ty()
self.const_.ty()
}
}

2
compiler/stable_mir/src/mir/pretty.rs
View File

@ -310,7 +310,7 @@ fn pretty_operand(operand: &Operand) -> String {
Operand::Move(mv) => {
format!("move {:?}", mv)
}
Operand::Constant(cnst) => pretty_mir_const(&cnst.literal),
Operand::Constant(cnst) => pretty_mir_const(&cnst.const_),
}
}

12
compiler/stable_mir/src/mir/visit.rs
View File

@ -108,8 +108,8 @@ pub trait MirVisitor {
self.super_ty(ty)
}
fn visit_constant(&mut self, constant: &Constant, location: Location) {
self.super_constant(constant, location)
fn visit_const_operand(&mut self, constant: &ConstOperand, location: Location) {
self.super_const_operand(constant, location)
}
fn visit_mir_const(&mut self, constant: &MirConst, location: Location) {
@ -366,7 +366,7 @@ pub trait MirVisitor {
self.visit_place(place, PlaceContext::NON_MUTATING, location)
}
Operand::Constant(constant) => {
self.visit_constant(constant, location);
self.visit_const_operand(constant, location);
}
}
}
@ -380,10 +380,10 @@ pub trait MirVisitor {
let _ = ty;
}
fn super_constant(&mut self, constant: &Constant, location: Location) {
let Constant { span, user_ty: _, literal } = constant;
fn super_const_operand(&mut self, constant: &ConstOperand, location: Location) {
let ConstOperand { span, user_ty: _, const_ } = constant;
self.visit_span(span);
self.visit_mir_const(literal, location);
self.visit_mir_const(const_, location);
}
fn super_mir_const(&mut self, constant: &MirConst, location: Location) {

8
tests/ui-fulldeps/stable-mir/check_transform.rs
View File

@ -21,7 +21,7 @@ extern crate stable_mir;
use rustc_smir::rustc_internal;
use stable_mir::mir::alloc::GlobalAlloc;
use stable_mir::mir::mono::Instance;
use stable_mir::mir::{Body, Constant, Operand, Rvalue, StatementKind, TerminatorKind};
use stable_mir::mir::{Body, ConstOperand, Operand, Rvalue, StatementKind, TerminatorKind};
use stable_mir::ty::{ConstantKind, MirConst};
use stable_mir::{CrateDef, CrateItems, ItemKind};
use std::convert::TryFrom;
@ -72,7 +72,7 @@ fn check_msg(body: &Body, expected: &str) {
.unwrap()
}
};
let ConstantKind::Allocated(alloc) = msg_const.literal.kind() else {
let ConstantKind::Allocated(alloc) = msg_const.const_.kind() else {
unreachable!()
};
assert_eq!(alloc.provenance.ptrs.len(), 1);
@ -96,8 +96,8 @@ fn change_panic_msg(mut body: Body, new_msg: &str) -> Body {
match &mut bb.terminator.kind {
TerminatorKind::Call { args, .. } => {
let new_const = MirConst::from_str(new_msg);
args[0] = Operand::Constant(Constant {
literal: new_const,
args[0] = Operand::Constant(ConstOperand {
const_: new_const,
span: bb.terminator.span,
user_ty: None,
});