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This commit is contained in:
The Miri Cronjob Bot 2024-08-29 05:07:14 +00:00
commit a10633afe6
176 changed files with 1438 additions and 795 deletions
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7
compiler/rustc_codegen_llvm/src/coverageinfo/ffi.rs
View file

@ -1,5 +1,5 @@
use rustc_middle::mir::coverage::{
CodeRegion, ConditionInfo, CounterId, CovTerm, DecisionInfo, ExpressionId, MappingKind,
ConditionInfo, CounterId, CovTerm, DecisionInfo, ExpressionId, MappingKind, SourceRegion,
};
/// Must match the layout of `LLVMRustCounterKind`.
@ -236,9 +236,10 @@ impl CounterMappingRegion {
pub(crate) fn from_mapping(
mapping_kind: &MappingKind,
local_file_id: u32,
code_region: &CodeRegion,
source_region: &SourceRegion,
) -> Self {
let &CodeRegion { file_name: _, start_line, start_col, end_line, end_col } = code_region;
let &SourceRegion { file_name: _, start_line, start_col, end_line, end_col } =
source_region;
match *mapping_kind {
MappingKind::Code(term) => Self::code_region(
Counter::from_term(term),

12
compiler/rustc_codegen_llvm/src/coverageinfo/map_data.rs
View file

@ -2,8 +2,8 @@ use rustc_data_structures::captures::Captures;
use rustc_data_structures::fx::FxIndexSet;
use rustc_index::bit_set::BitSet;
use rustc_middle::mir::coverage::{
CodeRegion, CounterId, CovTerm, Expression, ExpressionId, FunctionCoverageInfo, Mapping,
MappingKind, Op,
CounterId, CovTerm, Expression, ExpressionId, FunctionCoverageInfo, Mapping, MappingKind, Op,
SourceRegion,
};
use rustc_middle::ty::Instance;
use rustc_span::Symbol;
@ -201,7 +201,7 @@ impl<'tcx> FunctionCoverage<'tcx> {
/// Returns an iterator over all filenames used by this function's mappings.
pub(crate) fn all_file_names(&self) -> impl Iterator<Item = Symbol> + Captures<'_> {
self.function_coverage_info.mappings.iter().map(|mapping| mapping.code_region.file_name)
self.function_coverage_info.mappings.iter().map(|mapping| mapping.source_region.file_name)
}
/// Convert this function's coverage expression data into a form that can be
@ -230,12 +230,12 @@ impl<'tcx> FunctionCoverage<'tcx> {
/// that will be used by `mapgen` when preparing for FFI.
pub(crate) fn counter_regions(
&self,
) -> impl Iterator<Item = (MappingKind, &CodeRegion)> + ExactSizeIterator {
) -> impl Iterator<Item = (MappingKind, &SourceRegion)> + ExactSizeIterator {
self.function_coverage_info.mappings.iter().map(move |mapping| {
let Mapping { kind, code_region } = mapping;
let Mapping { kind, source_region } = mapping;
let kind =
kind.map_terms(|term| if self.is_zero_term(term) { CovTerm::Zero } else { term });
(kind, code_region)
(kind, source_region)
})
}

127
compiler/rustc_codegen_ssa/src/codegen_attrs.rs
View file

@ -1,5 +1,6 @@
use rustc_ast::{ast, attr, MetaItemKind, NestedMetaItem};
use rustc_attr::{list_contains_name, InlineAttr, InstructionSetAttr, OptimizeAttr};
use rustc_data_structures::fx::FxHashSet;
use rustc_errors::codes::*;
use rustc_errors::{struct_span_code_err, DiagMessage, SubdiagMessage};
use rustc_hir as hir;
@ -8,7 +9,7 @@ use rustc_hir::def_id::{DefId, LocalDefId, LOCAL_CRATE};
use rustc_hir::weak_lang_items::WEAK_LANG_ITEMS;
use rustc_hir::{lang_items, LangItem};
use rustc_middle::middle::codegen_fn_attrs::{
CodegenFnAttrFlags, CodegenFnAttrs, PatchableFunctionEntry,
CodegenFnAttrFlags, CodegenFnAttrs, PatchableFunctionEntry, TargetFeature,
};
use rustc_middle::mir::mono::Linkage;
use rustc_middle::query::Providers;
@ -17,6 +18,7 @@ use rustc_session::lint;
use rustc_session::parse::feature_err;
use rustc_span::symbol::Ident;
use rustc_span::{sym, Span};
use rustc_target::abi::VariantIdx;
use rustc_target::spec::{abi, SanitizerSet};
use crate::errors;
@ -78,6 +80,13 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
let mut link_ordinal_span = None;
let mut no_sanitize_span = None;
let fn_sig_outer = || {
use DefKind::*;
let def_kind = tcx.def_kind(did);
if let Fn | AssocFn | Variant | Ctor(..) = def_kind { Some(tcx.fn_sig(did)) } else { None }
};
for attr in attrs.iter() {
// In some cases, attribute are only valid on functions, but it's the `check_attr`
// pass that check that they aren't used anywhere else, rather this module.
@ -85,16 +94,12 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
// functions (such as calling `fn_sig`, which ICEs if given a non-function). We also
// report a delayed bug, just in case `check_attr` isn't doing its job.
let fn_sig = || {
use DefKind::*;
let def_kind = tcx.def_kind(did);
if let Fn | AssocFn | Variant | Ctor(..) = def_kind {
Some(tcx.fn_sig(did))
} else {
let sig = fn_sig_outer();
if sig.is_none() {
tcx.dcx()
.span_delayed_bug(attr.span, "this attribute can only be applied to functions");
None
}
sig
};
let Some(Ident { name, .. }) = attr.ident() else {
@ -613,7 +618,93 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
}
}
// If a function uses #[target_feature] it can't be inlined into general
if let Some(sig) = fn_sig_outer() {
// Collect target features from types reachable from arguments.
// We define a type as "reachable" if:
// - it is a function argument
// - it is a field of a reachable struct
// - there is a reachable reference to it
// FIXME(struct_target_features): we may want to cache the result of this computation.
let mut visited_types = FxHashSet::default();
let mut reachable_types: Vec<_> = sig.skip_binder().inputs().skip_binder().to_owned();
let mut additional_tf = vec![];
while let Some(ty) = reachable_types.pop() {
if visited_types.contains(&ty) {
continue;
}
visited_types.insert(ty);
match ty.kind() {
ty::Alias(..) => {
if let Ok(t) =
tcx.try_normalize_erasing_regions(tcx.param_env(did.to_def_id()), ty)
{
reachable_types.push(t)
}
}
ty::Ref(_, inner, _) => reachable_types.push(*inner),
ty::Tuple(tys) => reachable_types.extend(tys.iter()),
ty::Adt(adt_def, args) => {
additional_tf.extend_from_slice(tcx.struct_target_features(adt_def.did()));
// This only recurses into structs as i.e. an Option<TargetFeature> is an ADT
// that doesn't actually always contain a TargetFeature.
if adt_def.is_struct() {
reachable_types.extend(
adt_def
.variant(VariantIdx::from_usize(0))
.fields
.iter()
.map(|field| field.ty(tcx, args)),
);
}
}
ty::Bool
| ty::Char
| ty::Int(..)
| ty::Uint(..)
| ty::Float(..)
| ty::Foreign(..)
| ty::Str
| ty::Array(..)
| ty::Pat(..)
| ty::Slice(..)
| ty::RawPtr(..)
| ty::FnDef(..)
| ty::FnPtr(..)
| ty::Dynamic(..)
| ty::Closure(..)
| ty::CoroutineClosure(..)
| ty::Coroutine(..)
| ty::CoroutineWitness(..)
| ty::Never
| ty::Param(..)
| ty::Bound(..)
| ty::Placeholder(..)
| ty::Infer(..)
| ty::Error(..) => (),
}
}
// FIXME(struct_target_features): is this really necessary?
if !additional_tf.is_empty() && sig.skip_binder().abi() != abi::Abi::Rust {
tcx.dcx().span_err(
tcx.hir().span(tcx.local_def_id_to_hir_id(did)),
"cannot use a struct with target features in a function with non-Rust ABI",
);
}
if !additional_tf.is_empty() && codegen_fn_attrs.inline == InlineAttr::Always {
tcx.dcx().span_err(
tcx.hir().span(tcx.local_def_id_to_hir_id(did)),
"cannot use a struct with target features in a #[inline(always)] function",
);
}
codegen_fn_attrs
.target_features
.extend(additional_tf.iter().map(|tf| TargetFeature { implied: true, ..*tf }));
}
// If a function uses non-default target_features it can't be inlined into general
// purpose functions as they wouldn't have the right target features
// enabled. For that reason we also forbid #[inline(always)] as it can't be
// respected.
@ -758,6 +849,20 @@ fn check_link_name_xor_ordinal(
}
}
pub fn provide(providers: &mut Providers) {
*providers = Providers { codegen_fn_attrs, should_inherit_track_caller, ..*providers };
fn struct_target_features(tcx: TyCtxt<'_>, def_id: LocalDefId) -> &[TargetFeature] {
let mut features = vec![];
let supported_features = tcx.supported_target_features(LOCAL_CRATE);
for attr in tcx.get_attrs(def_id, sym::target_feature) {
from_target_feature(tcx, attr, supported_features, &mut features);
}
tcx.arena.alloc_slice(&features)
}
pub fn provide(providers: &mut Providers) {
*providers = Providers {
codegen_fn_attrs,
should_inherit_track_caller,
struct_target_features,
..*providers
};
}

3
compiler/rustc_const_eval/messages.ftl
View file

@ -402,9 +402,6 @@ const_eval_unallowed_mutable_refs =
const_eval_unallowed_op_in_const_context =
{$msg}
const_eval_unavailable_target_features_for_fn =
calling a function that requires unavailable target features: {$unavailable_feats}
const_eval_uninhabited_enum_variant_read =
read discriminant of an uninhabited enum variant
const_eval_uninhabited_enum_variant_written =

44
compiler/rustc_const_eval/src/interpret/call.rs
View file

@ -311,34 +311,6 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
Ok(())
}
fn check_fn_target_features(&self, instance: ty::Instance<'tcx>) -> InterpResult<'tcx, ()> {
// Calling functions with `#[target_feature]` is not unsafe on WASM, see #84988
let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
if !self.tcx.sess.target.is_like_wasm
&& attrs
.target_features
.iter()
.any(|feature| !self.tcx.sess.target_features.contains(&feature.name))
{
throw_ub_custom!(
fluent::const_eval_unavailable_target_features_for_fn,
unavailable_feats = attrs
.target_features
.iter()
.filter(|&feature| !feature.implied
&& !self.tcx.sess.target_features.contains(&feature.name))
.fold(String::new(), |mut s, feature| {
if !s.is_empty() {
s.push_str(", ");
}
s.push_str(feature.name.as_str());
s
}),
);
}
Ok(())
}
/// The main entry point for creating a new stack frame: performs ABI checks and initializes
/// arguments.
#[instrument(skip(self), level = "trace")]
@ -360,20 +332,18 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
throw_unsup_format!("calling a c-variadic function is not supported");
}
if M::enforce_abi(self) {
if caller_fn_abi.conv != callee_fn_abi.conv {
throw_ub_custom!(
fluent::const_eval_incompatible_calling_conventions,
callee_conv = format!("{:?}", callee_fn_abi.conv),
caller_conv = format!("{:?}", caller_fn_abi.conv),
)
}
if caller_fn_abi.conv != callee_fn_abi.conv {
throw_ub_custom!(
fluent::const_eval_incompatible_calling_conventions,
callee_conv = format!("{:?}", callee_fn_abi.conv),
caller_conv = format!("{:?}", caller_fn_abi.conv),
)
}
// Check that all target features required by the callee (i.e., from
// the attribute `#[target_feature(enable = ...)]`) are enabled at
// compile time.
self.check_fn_target_features(instance)?;
M::check_fn_target_features(self, instance)?;
if !callee_fn_abi.can_unwind {
// The callee cannot unwind, so force the `Unreachable` unwind handling.

10
compiler/rustc_const_eval/src/interpret/intrinsics.rs
View file

@ -684,19 +684,19 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
assert!(layout.is_sized());
let get_bytes = |this: &InterpCx<'tcx, M>,
op: &OpTy<'tcx, <M as Machine<'tcx>>::Provenance>,
size|
op: &OpTy<'tcx, <M as Machine<'tcx>>::Provenance>|
-> InterpResult<'tcx, &[u8]> {
let ptr = this.read_pointer(op)?;
let Some(alloc_ref) = self.get_ptr_alloc(ptr, size)? else {
this.check_ptr_align(ptr, layout.align.abi)?;
let Some(alloc_ref) = self.get_ptr_alloc(ptr, layout.size)? else {
// zero-sized access
return Ok(&[]);
};
alloc_ref.get_bytes_strip_provenance()
};
let lhs_bytes = get_bytes(self, lhs, layout.size)?;
let rhs_bytes = get_bytes(self, rhs, layout.size)?;
let lhs_bytes = get_bytes(self, lhs)?;
let rhs_bytes = get_bytes(self, rhs)?;
Ok(Scalar::from_bool(lhs_bytes == rhs_bytes))
}
}

32
compiler/rustc_const_eval/src/interpret/machine.rs
View file

@ -173,11 +173,6 @@ pub trait Machine<'tcx>: Sized {
false
}
/// Whether function calls should be [ABI](CallAbi)-checked.
fn enforce_abi(_ecx: &InterpCx<'tcx, Self>) -> bool {
true
}
/// Whether Assert(OverflowNeg) and Assert(Overflow) MIR terminators should actually
/// check for overflow.
fn ignore_optional_overflow_checks(_ecx: &InterpCx<'tcx, Self>) -> bool;
@ -238,6 +233,13 @@ pub trait Machine<'tcx>: Sized {
unwind: mir::UnwindAction,
) -> InterpResult<'tcx, Option<ty::Instance<'tcx>>>;
/// Check whether the given function may be executed on the current machine, in terms of the
/// target features is requires.
fn check_fn_target_features(
_ecx: &InterpCx<'tcx, Self>,
_instance: ty::Instance<'tcx>,
) -> InterpResult<'tcx>;
/// Called to evaluate `Assert` MIR terminators that trigger a panic.
fn assert_panic(
ecx: &mut InterpCx<'tcx, Self>,
@ -280,6 +282,9 @@ pub trait Machine<'tcx>: Sized {
Ok(())
}
/// Determines the result of a `NullaryOp::UbChecks` invocation.
fn ub_checks(_ecx: &InterpCx<'tcx, Self>) -> InterpResult<'tcx, bool>;
/// Called when the interpreter encounters a `StatementKind::ConstEvalCounter` instruction.
/// You can use this to detect long or endlessly running programs.
#[inline]
@ -614,6 +619,16 @@ pub macro compile_time_machine(<$tcx: lifetime>) {
unreachable!("unwinding cannot happen during compile-time evaluation")
}
#[inline(always)]
fn check_fn_target_features(
_ecx: &InterpCx<$tcx, Self>,
_instance: ty::Instance<$tcx>,
) -> InterpResult<$tcx> {
// For now we don't do any checking here. We can't use `tcx.sess` because that can differ
// between crates, and we need to ensure that const-eval always behaves the same.
Ok(())
}
#[inline(always)]
fn call_extra_fn(
_ecx: &mut InterpCx<$tcx, Self>,
@ -627,6 +642,13 @@ pub macro compile_time_machine(<$tcx: lifetime>) {
match fn_val {}
}
#[inline(always)]
fn ub_checks(_ecx: &InterpCx<$tcx, Self>) -> InterpResult<$tcx, bool> {
// We can't look at `tcx.sess` here as that can differ across crates, which can lead to
// unsound differences in evaluating the same constant at different instantiation sites.
Ok(true)
}
#[inline(always)]
fn adjust_global_allocation<'b>(
_ecx: &InterpCx<$tcx, Self>,

2
compiler/rustc_const_eval/src/interpret/operator.rs
View file

@ -512,7 +512,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
self.tcx.offset_of_subfield(self.param_env, layout, fields.iter()).bytes();
ImmTy::from_uint(val, usize_layout())
}
UbChecks => ImmTy::from_bool(self.tcx.sess.ub_checks(), *self.tcx),
UbChecks => ImmTy::from_bool(M::ub_checks(self)?, *self.tcx),
})
}
}

65
compiler/rustc_driver_impl/src/lib.rs
View file

@ -393,13 +393,17 @@ fn run_compiler(
let linker = compiler.enter(|queries| {
let early_exit = || early_exit().map(|_| None);
// Parse the crate root source code (doesn't parse submodules yet)
// Everything else is parsed during macro expansion.
queries.parse()?;
if let Some(ppm) = &sess.opts.pretty {
if ppm.needs_ast_map() {
// If pretty printing is requested: Figure out the representation, print it and exit
if let Some(pp_mode) = sess.opts.pretty {
if pp_mode.needs_ast_map() {
queries.global_ctxt()?.enter(|tcx| {
tcx.ensure().early_lint_checks(());
pretty::print(sess, *ppm, pretty::PrintExtra::NeedsAstMap { tcx });
pretty::print(sess, pp_mode, pretty::PrintExtra::NeedsAstMap { tcx });
Ok(())
})?;
@ -410,7 +414,7 @@ fn run_compiler(
let krate = queries.parse()?;
pretty::print(
sess,
*ppm,
pp_mode,
pretty::PrintExtra::AfterParsing { krate: &*krate.borrow() },
);
}
@ -465,12 +469,8 @@ fn run_compiler(
linker.link(sess, codegen_backend)?
}
if sess.opts.unstable_opts.print_fuel.is_some() {
eprintln!(
"Fuel used by {}: {}",
sess.opts.unstable_opts.print_fuel.as_ref().unwrap(),
sess.print_fuel.load(Ordering::SeqCst)
);
if let Some(fuel) = sess.opts.unstable_opts.print_fuel.as_deref() {
eprintln!("Fuel used by {}: {}", fuel, sess.print_fuel.load(Ordering::SeqCst));
}
Ok(())
@ -487,36 +487,43 @@ fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<OutFileNa
(odir, ofile)
}
// Extract input (string or file and optional path) from matches.
/// Extract input (string or file and optional path) from matches.
/// This handles reading from stdin if `-` is provided.
fn make_input(
early_dcx: &EarlyDiagCtxt,
free_matches: &[String],
) -> Result<Option<Input>, ErrorGuaranteed> {
let [ifile] = free_matches else { return Ok(None) };
if ifile == "-" {
let mut src = String::new();
if io::stdin().read_to_string(&mut src).is_err() {
// Immediately stop compilation if there was an issue reading
// the input (for example if the input stream is not UTF-8).
let reported =
early_dcx.early_err("couldn't read from stdin, as it did not contain valid UTF-8");
return Err(reported);
}
if let Ok(path) = env::var("UNSTABLE_RUSTDOC_TEST_PATH") {
let [input_file] = free_matches else { return Ok(None) };
if input_file != "-" {
// Normal `Input::File`
return Ok(Some(Input::File(PathBuf::from(input_file))));
}
// read from stdin as `Input::Str`
let mut input = String::new();
if io::stdin().read_to_string(&mut input).is_err() {
// Immediately stop compilation if there was an issue reading
// the input (for example if the input stream is not UTF-8).
let reported =
early_dcx.early_err("couldn't read from stdin, as it did not contain valid UTF-8");
return Err(reported);
}
let name = match env::var("UNSTABLE_RUSTDOC_TEST_PATH") {
Ok(path) => {
let line = env::var("UNSTABLE_RUSTDOC_TEST_LINE").expect(
"when UNSTABLE_RUSTDOC_TEST_PATH is set \
UNSTABLE_RUSTDOC_TEST_LINE also needs to be set",
);
let line = isize::from_str_radix(&line, 10)
.expect("UNSTABLE_RUSTDOC_TEST_LINE needs to be an number");
let file_name = FileName::doc_test_source_code(PathBuf::from(path), line);
Ok(Some(Input::Str { name: file_name, input: src }))
} else {
Ok(Some(Input::Str { name: FileName::anon_source_code(&src), input: src }))
FileName::doc_test_source_code(PathBuf::from(path), line)
}
} else {
Ok(Some(Input::File(PathBuf::from(ifile))))
}
Err(_) => FileName::anon_source_code(&input),
};
Ok(Some(Input::Str { name, input }))
}
/// Whether to stop or continue compilation.

2
compiler/rustc_feature/src/unstable.rs
View file

@ -594,6 +594,8 @@ declare_features! (
(unstable, strict_provenance, "1.61.0", Some(95228)),
/// Allows string patterns to dereference values to match them.
(unstable, string_deref_patterns, "1.67.0", Some(87121)),
/// Allows structs to carry target_feature information.
(incomplete, struct_target_features, "CURRENT_RUSTC_VERSION", Some(129107)),
/// Allows the use of `#[target_feature]` on safe functions.
(unstable, target_feature_11, "1.45.0", Some(69098)),
/// Allows using `#[thread_local]` on `static` items.

35
compiler/rustc_hir/src/def.rs
View file

@ -326,6 +326,41 @@ impl DefKind {
| DefKind::ExternCrate => false,
}
}
/// Whether `query struct_target_features` should be used with this definition.
pub fn has_struct_target_features(self) -> bool {
match self {
DefKind::Struct | DefKind::Union | DefKind::Enum => true,
DefKind::Fn
| DefKind::AssocFn
| DefKind::Ctor(..)
| DefKind::Closure
| DefKind::Static { .. }
| DefKind::Mod
| DefKind::Variant
| DefKind::Trait
| DefKind::TyAlias
| DefKind::ForeignTy
| DefKind::TraitAlias
| DefKind::AssocTy
| DefKind::Const
| DefKind::AssocConst
| DefKind::Macro(..)
| DefKind::Use
| DefKind::ForeignMod
| DefKind::OpaqueTy
| DefKind::Impl { .. }
| DefKind::Field
| DefKind::TyParam
| DefKind::ConstParam
| DefKind::LifetimeParam
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::SyntheticCoroutineBody
| DefKind::GlobalAsm
| DefKind::ExternCrate => false,
}
}
}
/// The resolution of a path or export.

31
compiler/rustc_hir_analysis/src/collect.rs
View file

@ -34,7 +34,7 @@ use rustc_infer::traits::ObligationCause;
use rustc_middle::hir::nested_filter;
use rustc_middle::query::Providers;
use rustc_middle::ty::util::{Discr, IntTypeExt};
use rustc_middle::ty::{self, AdtKind, Const, IsSuggestable, Ty, TyCtxt, Upcast};
use rustc_middle::ty::{self, AdtKind, Const, IsSuggestable, Ty, TyCtxt};
use rustc_middle::{bug, span_bug};
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::{Span, DUMMY_SP};
@ -70,7 +70,6 @@ pub fn provide(providers: &mut Providers) {
impl_super_outlives: item_bounds::impl_super_outlives,
generics_of: generics_of::generics_of,
predicates_of: predicates_of::predicates_of,
predicates_defined_on,
explicit_predicates_of: predicates_of::explicit_predicates_of,
explicit_super_predicates_of: predicates_of::explicit_super_predicates_of,
explicit_implied_predicates_of: predicates_of::explicit_implied_predicates_of,
@ -1775,34 +1774,6 @@ fn early_bound_lifetimes_from_generics<'a, 'tcx: 'a>(
})
}
/// Returns a list of type predicates for the definition with ID `def_id`, including inferred
/// lifetime constraints. This includes all predicates returned by `explicit_predicates_of`, plus
/// inferred constraints concerning which regions outlive other regions.
#[instrument(level = "debug", skip(tcx))]
fn predicates_defined_on(tcx: TyCtxt<'_>, def_id: DefId) -> ty::GenericPredicates<'_> {
let mut result = tcx.explicit_predicates_of(def_id);
debug!("predicates_defined_on: explicit_predicates_of({:?}) = {:?}", def_id, result);
let inferred_outlives = tcx.inferred_outlives_of(def_id);
if !inferred_outlives.is_empty() {
debug!(
"predicates_defined_on: inferred_outlives_of({:?}) = {:?}",
def_id, inferred_outlives,
);
let inferred_outlives_iter =
inferred_outlives.iter().map(|(clause, span)| ((*clause).upcast(tcx), *span));
if result.predicates.is_empty() {
result.predicates = tcx.arena.alloc_from_iter(inferred_outlives_iter);
} else {
result.predicates = tcx.arena.alloc_from_iter(
result.predicates.into_iter().copied().chain(inferred_outlives_iter),
);
}
}
debug!("predicates_defined_on({:?}) = {:?}", def_id, result);
result
}
fn compute_sig_of_foreign_fn_decl<'tcx>(
tcx: TyCtxt<'tcx>,
def_id: LocalDefId,

25
compiler/rustc_hir_analysis/src/collect/predicates_of.rs
View file

@ -18,10 +18,26 @@ use crate::delegation::inherit_predicates_for_delegation_item;
use crate::hir_ty_lowering::{HirTyLowerer, OnlySelfBounds, PredicateFilter, RegionInferReason};
/// Returns a list of all type predicates (explicit and implicit) for the definition with
/// ID `def_id`. This includes all predicates returned by `predicates_defined_on`, plus
/// `Self: Trait` predicates for traits.
/// ID `def_id`. This includes all predicates returned by `explicit_predicates_of`, plus
/// inferred constraints concerning which regions outlive other regions.
#[instrument(level = "debug", skip(tcx))]
pub(super) fn predicates_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::GenericPredicates<'_> {
let mut result = tcx.predicates_defined_on(def_id);
let mut result = tcx.explicit_predicates_of(def_id);
debug!("predicates_of: explicit_predicates_of({:?}) = {:?}", def_id, result);
let inferred_outlives = tcx.inferred_outlives_of(def_id);
if !inferred_outlives.is_empty() {
debug!("predicates_of: inferred_outlives_of({:?}) = {:?}", def_id, inferred_outlives,);
let inferred_outlives_iter =
inferred_outlives.iter().map(|(clause, span)| ((*clause).upcast(tcx), *span));
if result.predicates.is_empty() {
result.predicates = tcx.arena.alloc_from_iter(inferred_outlives_iter);
} else {
result.predicates = tcx.arena.alloc_from_iter(
result.predicates.into_iter().copied().chain(inferred_outlives_iter),
);
}
}
if tcx.is_trait(def_id) {
// For traits, add `Self: Trait` predicate. This is
@ -51,7 +67,8 @@ pub(super) fn predicates_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::GenericPredic
.chain(std::iter::once((ty::TraitRef::identity(tcx, def_id).upcast(tcx), span))),
);
}
debug!("predicates_of(def_id={:?}) = {:?}", def_id, result);
debug!("predicates_of({:?}) = {:?}", def_id, result);
result
}

2
compiler/rustc_hir_typeck/src/coercion.rs
View file

@ -850,6 +850,8 @@ impl<'f, 'tcx> Coerce<'f, 'tcx> {
}
// Safe `#[target_feature]` functions are not assignable to safe fn pointers (RFC 2396).
// FIXME(struct_target_features): should this be true also for functions that inherit
// target features from structs?
if b_hdr.safety == hir::Safety::Safe
&& !self.tcx.codegen_fn_attrs(def_id).target_features.is_empty()

1
compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
View file

@ -224,6 +224,7 @@ provide! { tcx, def_id, other, cdata,
variances_of => { table }
fn_sig => { table }
codegen_fn_attrs => { table }
struct_target_features => { table }
impl_trait_header => { table }
const_param_default => { table }
object_lifetime_default => { table }

3
compiler/rustc_metadata/src/rmeta/encoder.rs
View file

@ -1392,6 +1392,9 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
if def_kind.has_codegen_attrs() {
record!(self.tables.codegen_fn_attrs[def_id] <- self.tcx.codegen_fn_attrs(def_id));
}
if def_kind.has_struct_target_features() {
record_array!(self.tables.struct_target_features[def_id] <- self.tcx.struct_target_features(def_id));
}
if should_encode_visibility(def_kind) {
let vis =
self.tcx.local_visibility(local_id).map_id(|def_id| def_id.local_def_index);

3
compiler/rustc_metadata/src/rmeta/mod.rs
View file

@ -19,7 +19,7 @@ use rustc_macros::{
Decodable, Encodable, MetadataDecodable, MetadataEncodable, TyDecodable, TyEncodable,
};
use rustc_middle::metadata::ModChild;
use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs;
use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrs, TargetFeature};
use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile;
use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo};
use rustc_middle::middle::lib_features::FeatureStability;
@ -427,6 +427,7 @@ define_tables! {
variances_of: Table<DefIndex, LazyArray<ty::Variance>>,
fn_sig: Table<DefIndex, LazyValue<ty::EarlyBinder<'static, ty::PolyFnSig<'static>>>>,
codegen_fn_attrs: Table<DefIndex, LazyValue<CodegenFnAttrs>>,
struct_target_features: Table<DefIndex, LazyArray<TargetFeature>>,
impl_trait_header: Table<DefIndex, LazyValue<ty::ImplTraitHeader<'static>>>,
const_param_default: Table<DefIndex, LazyValue<ty::EarlyBinder<'static, rustc_middle::ty::Const<'static>>>>,
object_lifetime_default: Table<DefIndex, LazyValue<ObjectLifetimeDefault>>,

1
compiler/rustc_middle/src/arena.rs
View file

@ -35,7 +35,6 @@ macro_rules! arena_types {
)>,
[] crate_for_resolver: rustc_data_structures::steal::Steal<(rustc_ast::Crate, rustc_ast::AttrVec)>,
[] resolutions: rustc_middle::ty::ResolverGlobalCtxt,
[decode] code_region: rustc_middle::mir::coverage::CodeRegion,
[] const_allocs: rustc_middle::mir::interpret::Allocation,
[] region_scope_tree: rustc_middle::middle::region::ScopeTree,
// Required for the incremental on-disk cache

8
compiler/rustc_middle/src/middle/codegen_fn_attrs.rs
View file

@ -26,8 +26,8 @@ pub struct CodegenFnAttrs {
/// be set when `link_name` is set. This is for foreign items with the
/// "raw-dylib" kind.
pub link_ordinal: Option<u16>,
/// The `#[target_feature(enable = "...")]` attribute and the enabled
/// features (only enabled features are supported right now).
/// All the target features that are enabled for this function. Some features might be enabled
/// implicitly.
pub target_features: Vec<TargetFeature>,
/// The `#[linkage = "..."]` attribute on Rust-defined items and the value we found.
pub linkage: Option<Linkage>,
@ -55,8 +55,8 @@ pub struct CodegenFnAttrs {
pub struct TargetFeature {
/// The name of the target feature (e.g. "avx")
pub name: Symbol,
/// The feature is implied by another feature, rather than explicitly added by the
/// `#[target_feature]` attribute
/// The feature is implied by another feature or by an argument, rather than explicitly
/// added by the `#[target_feature]` attribute
pub implied: bool,
}

6
compiler/rustc_middle/src/mir/coverage.rs
View file

@ -163,7 +163,7 @@ impl Debug for CoverageKind {
#[derive(Clone, TyEncodable, TyDecodable, Hash, HashStable, PartialEq, Eq, PartialOrd, Ord)]
#[derive(TypeFoldable, TypeVisitable)]
pub struct CodeRegion {
pub struct SourceRegion {
pub file_name: Symbol,
pub start_line: u32,
pub start_col: u32,
@ -171,7 +171,7 @@ pub struct CodeRegion {
pub end_col: u32,
}
impl Debug for CodeRegion {
impl Debug for SourceRegion {
fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result {
write!(
fmt,
@ -242,7 +242,7 @@ impl MappingKind {
#[derive(TyEncodable, TyDecodable, Hash, HashStable, TypeFoldable, TypeVisitable)]
pub struct Mapping {
pub kind: MappingKind,
pub code_region: CodeRegion,
pub source_region: SourceRegion,
}
/// Stores per-function coverage information attached to a `mir::Body`,

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

@ -547,8 +547,8 @@ fn write_function_coverage_info(
for (id, expression) in expressions.iter_enumerated() {
writeln!(w, "{INDENT}coverage {id:?} => {expression:?};")?;
}
for coverage::Mapping { kind, code_region } in mappings {
writeln!(w, "{INDENT}coverage {kind:?} => {code_region:?};")?;
for coverage::Mapping { kind, source_region } in mappings {
writeln!(w, "{INDENT}coverage {kind:?} => {source_region:?};")?;
}
writeln!(w)?;

26
compiler/rustc_middle/src/query/mod.rs
View file

@ -47,7 +47,7 @@ use {rustc_ast as ast, rustc_attr as attr, rustc_hir as hir};
use crate::infer::canonical::{self, Canonical};
use crate::lint::LintExpectation;
use crate::metadata::ModChild;
use crate::middle::codegen_fn_attrs::CodegenFnAttrs;
use crate::middle::codegen_fn_attrs::{CodegenFnAttrs, TargetFeature};
use crate::middle::debugger_visualizer::DebuggerVisualizerFile;
use crate::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo};
use crate::middle::lib_features::LibFeatures;
@ -312,17 +312,6 @@ rustc_queries! {
/// predicates (where-clauses) that must be proven true in order
/// to reference it. This is almost always the "predicates query"
/// that you want.
///
/// `predicates_of` builds on `predicates_defined_on` -- in fact,
/// it is almost always the same as that query, except for the
/// case of traits. For traits, `predicates_of` contains
/// an additional `Self: Trait<...>` predicate that users don't
/// actually write. This reflects the fact that to invoke the
/// trait (e.g., via `Default::default`) you must supply types
/// that actually implement the trait. (However, this extra
/// predicate gets in the way of some checks, which are intended
/// to operate over only the actual where-clauses written by the
/// user.)
query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
cache_on_disk_if { key.is_local() }
@ -619,14 +608,6 @@ rustc_queries! {
desc { "getting wasm import module map" }
}
/// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
/// predicates (where-clauses) directly defined on it. This is
/// equal to the `explicit_predicates_of` predicates plus the
/// `inferred_outlives_of` predicates.
query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
}
/// Returns everything that looks like a predicate written explicitly
/// by the user on a trait item.
///
@ -1264,6 +1245,11 @@ rustc_queries! {
feedable
}
query struct_target_features(def_id: DefId) -> &'tcx [TargetFeature] {
separate_provide_extern
desc { |tcx| "computing target features for struct `{}`", tcx.def_path_str(def_id) }
}
query asm_target_features(def_id: DefId) -> &'tcx FxIndexSet<Symbol> {
desc { |tcx| "computing target features for inline asm of `{}`", tcx.def_path_str(def_id) }
}

1
compiler/rustc_middle/src/ty/codec.rs
View file

@ -462,7 +462,6 @@ impl_decodable_via_ref! {
&'tcx traits::ImplSource<'tcx, ()>,
&'tcx mir::Body<'tcx>,
&'tcx mir::BorrowCheckResult<'tcx>,
&'tcx mir::coverage::CodeRegion,
&'tcx ty::List<ty::BoundVariableKind>,
&'tcx ty::ListWithCachedTypeInfo<ty::Clause<'tcx>>,
&'tcx ty::List<FieldIdx>,

1
compiler/rustc_middle/src/ty/parameterized.rs
View file

@ -59,6 +59,7 @@ trivially_parameterized_over_tcx! {
std::string::String,
crate::metadata::ModChild,
crate::middle::codegen_fn_attrs::CodegenFnAttrs,
crate::middle::codegen_fn_attrs::TargetFeature,
crate::middle::debugger_visualizer::DebuggerVisualizerFile,
crate::middle::exported_symbols::SymbolExportInfo,
crate::middle::lib_features::FeatureStability,

16
compiler/rustc_mir_build/messages.ftl
View file

@ -125,6 +125,17 @@ mir_build_initializing_type_with_requires_unsafe_unsafe_op_in_unsafe_fn_allowed
.note = initializing a layout restricted type's field with a value outside the valid range is undefined behavior
.label = initializing type with `rustc_layout_scalar_valid_range` attr
mir_build_initializing_type_with_target_feature_requires_unsafe =
initializing type with `target_feature` attr is unsafe and requires unsafe block
.note = this struct can only be constructed if the corresponding `target_feature`s are available
.label = initializing type with `target_feature` attr
mir_build_initializing_type_with_target_feature_requires_unsafe_unsafe_op_in_unsafe_fn_allowed =
initializing type with `target_feature` attr is unsafe and requires unsafe function or block
.note = this struct can only be constructed if the corresponding `target_feature`s are available
.label = initializing type with `target_feature` attr
mir_build_inline_assembly_requires_unsafe =
use of inline assembly is unsafe and requires unsafe block
.note = inline assembly is entirely unchecked and can cause undefined behavior
@ -387,6 +398,11 @@ mir_build_unsafe_op_in_unsafe_fn_initializing_type_with_requires_unsafe =
.note = initializing a layout restricted type's field with a value outside the valid range is undefined behavior
.label = initializing type with `rustc_layout_scalar_valid_range` attr
mir_build_unsafe_op_in_unsafe_fn_initializing_type_with_target_feature_requires_unsafe =
initializing type with `target_feature` attr is unsafe and requires unsafe block
.note = this struct can only be constructed if the corresponding `target_feature`s are available
.label = initializing type with `target_feature` attr
mir_build_unsafe_op_in_unsafe_fn_inline_assembly_requires_unsafe =
use of inline assembly is unsafe and requires unsafe block
.note = inline assembly is entirely unchecked and can cause undefined behavior

46
compiler/rustc_mir_build/src/check_unsafety.rs
View file

@ -461,14 +461,18 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
};
self.requires_unsafe(expr.span, CallToUnsafeFunction(func_id));
} else if let &ty::FnDef(func_did, _) = self.thir[fun].ty.kind() {
// If the called function has target features the calling function hasn't,
// If the called function has explicit target features the calling function hasn't,
// the call requires `unsafe`. Don't check this on wasm
// targets, though. For more information on wasm see the
// is_like_wasm check in hir_analysis/src/collect.rs
// Implicit target features are OK because they are either a consequence of some
// explicit target feature (which is checked to be present in the caller) or
// come from a witness argument.
let callee_features = &self.tcx.codegen_fn_attrs(func_did).target_features;
if !self.tcx.sess.target.options.is_like_wasm
&& !callee_features.iter().all(|feature| {
self.body_target_features.iter().any(|f| f.name == feature.name)
feature.implied
|| self.body_target_features.iter().any(|f| f.name == feature.name)
})
{
let missing: Vec<_> = callee_features
@ -542,10 +546,16 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
user_ty: _,
fields: _,
base: _,
}) => match self.tcx.layout_scalar_valid_range(adt_def.did()) {
(Bound::Unbounded, Bound::Unbounded) => {}
_ => self.requires_unsafe(expr.span, InitializingTypeWith),
},
}) => {
match self.tcx.layout_scalar_valid_range(adt_def.did()) {
(Bound::Unbounded, Bound::Unbounded) => {}
_ => self.requires_unsafe(expr.span, InitializingTypeWith),
}
if !self.tcx.struct_target_features(adt_def.did()).is_empty() {
self.requires_unsafe(expr.span, ConstructingTargetFeaturesType)
}
}
ExprKind::Closure(box ClosureExpr {
closure_id,
args: _,
@ -647,6 +657,7 @@ enum UnsafeOpKind {
CallToUnsafeFunction(Option<DefId>),
UseOfInlineAssembly,
InitializingTypeWith,
ConstructingTargetFeaturesType,
UseOfMutableStatic,
UseOfExternStatic,
DerefOfRawPointer,
@ -728,6 +739,15 @@ impl UnsafeOpKind {
unsafe_not_inherited_note,
},
),
ConstructingTargetFeaturesType => tcx.emit_node_span_lint(
UNSAFE_OP_IN_UNSAFE_FN,
hir_id,
span,
UnsafeOpInUnsafeFnInitializingTypeWithTargetFeatureRequiresUnsafe {
span,
unsafe_not_inherited_note,
},
),
UseOfMutableStatic => tcx.emit_node_span_lint(
UNSAFE_OP_IN_UNSAFE_FN,
hir_id,
@ -885,6 +905,20 @@ impl UnsafeOpKind {
unsafe_not_inherited_note,
});
}
ConstructingTargetFeaturesType if unsafe_op_in_unsafe_fn_allowed => {
dcx.emit_err(
InitializingTypeWithTargetFeatureRequiresUnsafeUnsafeOpInUnsafeFnAllowed {
span,
unsafe_not_inherited_note,
},
);
}
ConstructingTargetFeaturesType => {
dcx.emit_err(InitializingTypeWithTargetFeatureRequiresUnsafe {
span,
unsafe_not_inherited_note,
});
}
UseOfMutableStatic if unsafe_op_in_unsafe_fn_allowed => {
dcx.emit_err(UseOfMutableStaticRequiresUnsafeUnsafeOpInUnsafeFnAllowed {
span,

35
compiler/rustc_mir_build/src/errors.rs
View file

@ -86,6 +86,16 @@ pub(crate) struct UnsafeOpInUnsafeFnInitializingTypeWithRequiresUnsafe {
pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
}
#[derive(LintDiagnostic)]
#[diag(mir_build_unsafe_op_in_unsafe_fn_initializing_type_with_target_feature_requires_unsafe, code = E0133)]
#[note]
pub(crate) struct UnsafeOpInUnsafeFnInitializingTypeWithTargetFeatureRequiresUnsafe {
#[label]
pub(crate) span: Span,
#[subdiagnostic]
pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedLintNote>,
}
#[derive(LintDiagnostic)]
#[diag(mir_build_unsafe_op_in_unsafe_fn_mutable_static_requires_unsafe, code = E0133)]
#[note]
@ -250,6 +260,17 @@ pub(crate) struct InitializingTypeWithRequiresUnsafe {
pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedNote>,
}
#[derive(Diagnostic)]
#[diag(mir_build_initializing_type_with_target_feature_requires_unsafe, code = E0133)]
#[note]
pub(crate) struct InitializingTypeWithTargetFeatureRequiresUnsafe {
#[primary_span]
#[label]
pub(crate) span: Span,
#[subdiagnostic]
pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedNote>,
}
#[derive(Diagnostic)]
#[diag(
mir_build_initializing_type_with_requires_unsafe_unsafe_op_in_unsafe_fn_allowed,
@ -264,6 +285,20 @@ pub(crate) struct InitializingTypeWithRequiresUnsafeUnsafeOpInUnsafeFnAllowed {
pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedNote>,
}
#[derive(Diagnostic)]
#[diag(
mir_build_initializing_type_with_target_feature_requires_unsafe_unsafe_op_in_unsafe_fn_allowed,
code = E0133
)]
#[note]
pub(crate) struct InitializingTypeWithTargetFeatureRequiresUnsafeUnsafeOpInUnsafeFnAllowed {
#[primary_span]
#[label]
pub(crate) span: Span,
#[subdiagnostic]
pub(crate) unsafe_not_inherited_note: Option<UnsafeNotInheritedNote>,
}
#[derive(Diagnostic)]
#[diag(mir_build_mutable_static_requires_unsafe, code = E0133)]
#[note]

48
compiler/rustc_mir_transform/src/coverage/mod.rs
View file

@ -13,7 +13,7 @@ use rustc_hir::intravisit::{walk_expr, Visitor};
use rustc_middle::hir::map::Map;
use rustc_middle::hir::nested_filter;
use rustc_middle::mir::coverage::{
CodeRegion, CoverageKind, DecisionInfo, FunctionCoverageInfo, Mapping, MappingKind,
CoverageKind, DecisionInfo, FunctionCoverageInfo, Mapping, MappingKind, SourceRegion,
};
use rustc_middle::mir::{
self, BasicBlock, BasicBlockData, SourceInfo, Statement, StatementKind, Terminator,
@ -159,7 +159,7 @@ fn create_mappings<'tcx>(
.expect("all BCBs with spans were given counters")
.as_term()
};
let region_for_span = |span: Span| make_code_region(source_map, file_name, span, body_span);
let region_for_span = |span: Span| make_source_region(source_map, file_name, span, body_span);
// Fully destructure the mappings struct to make sure we don't miss any kinds.
let ExtractedMappings {
@ -175,9 +175,9 @@ fn create_mappings<'tcx>(
mappings.extend(code_mappings.iter().filter_map(
// Ordinary code mappings are the simplest kind.
|&mappings::CodeMapping { span, bcb }| {
let code_region = region_for_span(span)?;
let source_region = region_for_span(span)?;
let kind = MappingKind::Code(term_for_bcb(bcb));
Some(Mapping { kind, code_region })
Some(Mapping { kind, source_region })
},
));
@ -186,29 +186,29 @@ fn create_mappings<'tcx>(
let true_term = term_for_bcb(true_bcb);
let false_term = term_for_bcb(false_bcb);
let kind = MappingKind::Branch { true_term, false_term };
let code_region = region_for_span(span)?;
Some(Mapping { kind, code_region })
let source_region = region_for_span(span)?;
Some(Mapping { kind, source_region })
},
));
mappings.extend(mcdc_branches.iter().filter_map(
|&mappings::MCDCBranch { span, true_bcb, false_bcb, condition_info, decision_depth: _ }| {
let code_region = region_for_span(span)?;
let source_region = region_for_span(span)?;
let true_term = term_for_bcb(true_bcb);
let false_term = term_for_bcb(false_bcb);
let kind = match condition_info {
Some(mcdc_params) => MappingKind::MCDCBranch { true_term, false_term, mcdc_params },
None => MappingKind::Branch { true_term, false_term },
};
Some(Mapping { kind, code_region })
Some(Mapping { kind, source_region })
},
));
mappings.extend(mcdc_decisions.iter().filter_map(
|&mappings::MCDCDecision { span, bitmap_idx, num_conditions, .. }| {
let code_region = region_for_span(span)?;
let source_region = region_for_span(span)?;
let kind = MappingKind::MCDCDecision(DecisionInfo { bitmap_idx, num_conditions });
Some(Mapping { kind, code_region })
Some(Mapping { kind, source_region })
},
));
@ -362,19 +362,13 @@ fn inject_statement(mir_body: &mut mir::Body<'_>, counter_kind: CoverageKind, bb
/// but it's hard to rule out entirely (especially in the presence of complex macros
/// or other expansions), and if it does happen then skipping a span or function is
/// better than an ICE or `llvm-cov` failure that the user might have no way to avoid.
fn make_code_region(
#[instrument(level = "debug", skip(source_map))]
fn make_source_region(
source_map: &SourceMap,
file_name: Symbol,
span: Span,
body_span: Span,
) -> Option<CodeRegion> {
debug!(
"Called make_code_region(file_name={}, span={}, body_span={})",
file_name,
source_map.span_to_diagnostic_string(span),
source_map.span_to_diagnostic_string(body_span)
);
) -> Option<SourceRegion> {
let lo = span.lo();
let hi = span.hi();
@ -424,7 +418,7 @@ fn make_code_region(
start_line = source_map.doctest_offset_line(&file.name, start_line);
end_line = source_map.doctest_offset_line(&file.name, end_line);
check_code_region(CodeRegion {
check_source_region(SourceRegion {
file_name,
start_line: start_line as u32,
start_col: start_col as u32,
@ -433,12 +427,12 @@ fn make_code_region(
})
}
/// If `llvm-cov` sees a code region that is improperly ordered (end < start),
/// If `llvm-cov` sees a source region that is improperly ordered (end < start),
/// it will immediately exit with a fatal error. To prevent that from happening,
/// discard regions that are improperly ordered, or might be interpreted in a
/// way that makes them improperly ordered.
fn check_code_region(code_region: CodeRegion) -> Option<CodeRegion> {
let CodeRegion { file_name: _, start_line, start_col, end_line, end_col } = code_region;
fn check_source_region(source_region: SourceRegion) -> Option<SourceRegion> {
let SourceRegion { file_name: _, start_line, start_col, end_line, end_col } = source_region;
// Line/column coordinates are supposed to be 1-based. If we ever emit
// coordinates of 0, `llvm-cov` might misinterpret them.
@ -451,17 +445,17 @@ fn check_code_region(code_region: CodeRegion) -> Option<CodeRegion> {
let is_ordered = (start_line, start_col) <= (end_line, end_col);
if all_nonzero && end_col_has_high_bit_unset && is_ordered {
Some(code_region)
Some(source_region)
} else {
debug!(
?code_region,
?source_region,
?all_nonzero,
?end_col_has_high_bit_unset,
?is_ordered,
"Skipping code region that would be misinterpreted or rejected by LLVM"
"Skipping source region that would be misinterpreted or rejected by LLVM"
);
// If this happens in a debug build, ICE to make it easier to notice.
debug_assert!(false, "Improper code region: {code_region:?}");
debug_assert!(false, "Improper source region: {source_region:?}");
None
}
}

2
compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs
View file

@ -862,7 +862,7 @@ where
_ecx: &mut EvalCtxt<'_, D>,
goal: Goal<I, Self>,
) -> Result<Candidate<I>, NoSolution> {
panic!("`BikeshedIntrinsicFrom` does not have an associated type: {:?}", goal)
panic!("`TransmuteFrom` does not have an associated type: {:?}", goal)
}
fn consider_builtin_effects_intersection_candidate(

4
compiler/rustc_parse/src/parser/item.rs
View file

@ -51,7 +51,9 @@ impl<'a> Parser<'a> {
}
/// Parses the contents of a module (inner attributes followed by module items).
/// We exit once we hit `term`
/// We exit once we hit `term` which can be either
/// - EOF (for files)
/// - `}` for mod items
pub fn parse_mod(
&mut self,
term: &TokenKind,

4
compiler/rustc_passes/messages.ftl
View file

@ -672,6 +672,10 @@ passes_should_be_applied_to_fn =
*[false] not a function definition
}
passes_should_be_applied_to_fn_or_unit_struct =
attribute should be applied to a function definition or unit struct
.label = not a function definition or a unit struct
passes_should_be_applied_to_static =
attribute should be applied to a static
.label = not a static

34
compiler/rustc_passes/src/check_attr.rs
View file

@ -517,6 +517,7 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
sym::no_mangle,
sym::naked,
sym::instruction_set,
sym::repr,
// code generation
sym::cold,
sym::target_feature,
@ -746,12 +747,35 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
Target::Field | Target::Arm | Target::MacroDef => {
self.inline_attr_str_error_with_macro_def(hir_id, attr, "target_feature");
}
Target::Struct if self.tcx.features().struct_target_features => {
let ty = self.tcx.hir_node(hir_id).expect_item();
match ty.kind {
ItemKind::Struct(data, _) => {
if data.fields().len() != 0 {
self.dcx().emit_err(errors::AttrShouldBeAppliedToFnOrUnitStruct {
attr_span: attr.span,
defn_span: span,
});
}
}
_ => {
panic!("Target::Struct for a non-struct");
}
}
}
_ => {
self.dcx().emit_err(errors::AttrShouldBeAppliedToFn {
attr_span: attr.span,
defn_span: span,
on_crate: hir_id == CRATE_HIR_ID,
});
if self.tcx.features().struct_target_features {
self.dcx().emit_err(errors::AttrShouldBeAppliedToFnOrUnitStruct {
attr_span: attr.span,
defn_span: span,
});
} else {
self.dcx().emit_err(errors::AttrShouldBeAppliedToFn {
attr_span: attr.span,
defn_span: span,
on_crate: hir_id == CRATE_HIR_ID,
});
}
}
}
}

9
compiler/rustc_passes/src/errors.rs
View file

@ -82,6 +82,15 @@ pub struct AttrShouldBeAppliedToFn {
pub on_crate: bool,
}
#[derive(Diagnostic)]
#[diag(passes_should_be_applied_to_fn_or_unit_struct)]
pub struct AttrShouldBeAppliedToFnOrUnitStruct {
#[primary_span]
pub attr_span: Span,
#[label]
pub defn_span: Span,
}
#[derive(Diagnostic)]
#[diag(passes_should_be_applied_to_fn, code = E0739)]
pub struct TrackedCallerWrongLocation {

1
compiler/rustc_session/src/config.rs
View file

@ -2893,6 +2893,7 @@ pub enum PpHirMode {
}
#[derive(Copy, Clone, PartialEq, Debug)]
/// Pretty print mode
pub enum PpMode {
/// Options that print the source code, i.e.
/// `-Zunpretty=normal` and `-Zunpretty=expanded`

1
compiler/rustc_span/src/symbol.rs
View file

@ -1852,6 +1852,7 @@ symbols! {
stringify,
struct_field_attributes,
struct_inherit,
struct_target_features,
struct_variant,
structural_match,
structural_peq,

2
compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs
View file

@ -438,6 +438,8 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
let is_target_feature_fn = if let ty::FnDef(def_id, _) =
*leaf_trait_ref.skip_binder().self_ty().kind()
{
// FIXME(struct_target_features): should a function that inherits
// target_features through arguments implement Fn traits?
!self.tcx.codegen_fn_attrs(def_id).target_features.is_empty()
} else {
false

2
compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
View file

@ -545,6 +545,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
// Provide an impl for suitable functions, rejecting `#[target_feature]` functions (RFC 2396).
ty::FnDef(def_id, args) => {
let tcx = self.tcx();
// FIXME(struct_target_features): should a function that inherits target_features
// through an argument implement Fn traits?
if tcx.fn_sig(def_id).skip_binder().is_fn_trait_compatible()
&& tcx.codegen_fn_attrs(def_id).target_features.is_empty()
{

4
library/core/src/intrinsics.rs
View file

@ -2949,7 +2949,7 @@ pub const unsafe fn typed_swap<T>(x: *mut T, y: *mut T) {
/// sysroot which is built without ub_checks but with `#[rustc_preserve_ub_checks]`.
/// For code that gets monomorphized in the user crate (i.e., generic functions and functions with
/// `#[inline]`), gating assertions on `ub_checks()` rather than `cfg!(ub_checks)` means that
/// assertions are enabled whenever the *user crate* has UB checks enabled. However if the
/// assertions are enabled whenever the *user crate* has UB checks enabled. However, if the
/// user has UB checks disabled, the checks will still get optimized out. This intrinsic is
/// primarily used by [`ub_checks::assert_unsafe_precondition`].
#[rustc_const_unstable(feature = "const_ub_checks", issue = "none")]
@ -2957,7 +2957,7 @@ pub const unsafe fn typed_swap<T>(x: *mut T, y: *mut T) {
#[inline(always)]
#[rustc_intrinsic]
pub const fn ub_checks() -> bool {
cfg!(debug_assertions)
cfg!(ub_checks)
}
/// Allocates a block of memory at compile time.

1
library/core/src/lib.rs
View file

@ -203,6 +203,7 @@
#![feature(cfg_sanitize)]
#![feature(cfg_target_has_atomic)]
#![feature(cfg_target_has_atomic_equal_alignment)]
#![feature(cfg_ub_checks)]
#![feature(const_for)]
#![feature(const_mut_refs)]
#![feature(const_precise_live_drops)]

2
library/core/src/mem/mod.rs
View file

@ -19,7 +19,7 @@ pub use maybe_uninit::MaybeUninit;
mod transmutability;
#[unstable(feature = "transmutability", issue = "99571")]
pub use transmutability::{Assume, BikeshedIntrinsicFrom};
pub use transmutability::{Assume, TransmuteFrom};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(inline)]

109
library/core/src/mem/transmutability.rs
View file

@ -11,10 +11,10 @@ use crate::marker::{ConstParamTy_, UnsizedConstParamTy};
///
/// # Safety
///
/// If `Dst: BikeshedIntrinsicFrom<Src, ASSUMPTIONS>`, the compiler guarantees
/// that `Src` is soundly *union-transmutable* into a value of type `Dst`,
/// provided that the programmer has guaranteed that the given
/// [`ASSUMPTIONS`](Assume) are satisfied.
/// If `Dst: TransmuteFrom<Src, ASSUMPTIONS>`, the compiler guarantees that
/// `Src` is soundly *union-transmutable* into a value of type `Dst`, provided
/// that the programmer has guaranteed that the given [`ASSUMPTIONS`](Assume)
/// are satisfied.
///
/// A union-transmute is any bit-reinterpretation conversion in the form of:
///
@ -47,7 +47,7 @@ use crate::marker::{ConstParamTy_, UnsizedConstParamTy};
#[cfg_attr(not(bootstrap), doc = "```rust")]
/// #![feature(transmutability)]
///
/// use core::mem::{Assume, BikeshedIntrinsicFrom};
/// use core::mem::{Assume, TransmuteFrom};
///
/// let src = 42u8; // size = 1
///
@ -55,7 +55,7 @@ use crate::marker::{ConstParamTy_, UnsizedConstParamTy};
/// struct Dst(u8); // size = 2
//
/// let _ = unsafe {
/// <Dst as BikeshedIntrinsicFrom<u8, { Assume::SAFETY }>>::transmute(src)
/// <Dst as TransmuteFrom<u8, { Assume::SAFETY }>>::transmute(src)
/// };
/// ```
///
@ -87,7 +87,7 @@ use crate::marker::{ConstParamTy_, UnsizedConstParamTy};
#[lang = "transmute_trait"]
#[rustc_deny_explicit_impl(implement_via_object = false)]
#[rustc_coinductive]
pub unsafe trait BikeshedIntrinsicFrom<Src, const ASSUME: Assume = { Assume::NOTHING }>
pub unsafe trait TransmuteFrom<Src, const ASSUME: Assume = { Assume::NOTHING }>
where
Src: ?Sized,
{
@ -140,23 +140,21 @@ where
}
}
/// Configurable proof assumptions of [`BikeshedIntrinsicFrom`].
/// Configurable proof assumptions of [`TransmuteFrom`].
///
/// When `false`, the respective proof obligation belongs to the compiler. When
/// `true`, the onus of the safety proof belongs to the programmer.
/// [`BikeshedIntrinsicFrom`].
#[unstable(feature = "transmutability", issue = "99571")]
#[lang = "transmute_opts"]
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
pub struct Assume {
/// When `false`, [`BikeshedIntrinsicFrom`] is not implemented for
/// transmutations that might violate the the alignment requirements of
/// references; e.g.:
/// When `false`, [`TransmuteFrom`] is not implemented for transmutations
/// that might violate the the alignment requirements of references; e.g.:
///
#[cfg_attr(bootstrap, doc = "```rust,ignore not runnable on bootstrap")]
#[cfg_attr(not(bootstrap), doc = "```compile_fail,E0277")]
/// #![feature(transmutability)]
/// use core::mem::{align_of, BikeshedIntrinsicFrom};
/// use core::mem::{align_of, TransmuteFrom};
///
/// assert_eq!(align_of::<[u8; 2]>(), 1);
/// assert_eq!(align_of::<u16>(), 2);
@ -165,18 +163,18 @@ pub struct Assume {
///
/// // SAFETY: No safety obligations.
/// let dst: &u16 = unsafe {
/// <_ as BikeshedIntrinsicFrom<_>>::transmute(src)
/// <_ as TransmuteFrom<_>>::transmute(src)
/// };
/// ```
///
/// When `true`, [`BikeshedIntrinsicFrom`] assumes that *you* have ensured
/// When `true`, [`TransmuteFrom`] assumes that *you* have ensured
/// that references in the transmuted value satisfy the alignment
/// requirements of their referent types; e.g.:
///
#[cfg_attr(bootstrap, doc = "```rust,ignore not runnable on bootstrap")]
#[cfg_attr(not(bootstrap), doc = "```rust")]
/// #![feature(pointer_is_aligned_to, transmutability)]
/// use core::mem::{align_of, Assume, BikeshedIntrinsicFrom};
/// use core::mem::{align_of, Assume, TransmuteFrom};
///
/// let src: &[u8; 2] = &[0xFF, 0xFF];
///
@ -184,7 +182,7 @@ pub struct Assume {
/// // SAFETY: We have checked above that the address of `src` satisfies the
/// // alignment requirements of `u16`.
/// Some(unsafe {
/// <_ as BikeshedIntrinsicFrom<_, { Assume::ALIGNMENT }>>::transmute(src)
/// <_ as TransmuteFrom<_, { Assume::ALIGNMENT }>>::transmute(src)
/// })
/// } else {
/// None
@ -194,21 +192,21 @@ pub struct Assume {
/// ```
pub alignment: bool,
/// When `false`, [`BikeshedIntrinsicFrom`] is not implemented for
/// transmutations that extend the lifetimes of references.
/// When `false`, [`TransmuteFrom`] is not implemented for transmutations
/// that extend the lifetimes of references.
///
/// When `true`, [`BikeshedIntrinsicFrom`] assumes that *you* have ensured
/// that references in the transmuted value do not outlive their referents.
/// When `true`, [`TransmuteFrom`] assumes that *you* have ensured that
/// references in the transmuted value do not outlive their referents.
pub lifetimes: bool,
/// When `false`, [`BikeshedIntrinsicFrom`] is not implemented for
/// transmutations that might violate the library safety invariants of the
/// destination type; e.g.:
/// When `false`, [`TransmuteFrom`] is not implemented for transmutations
/// that might violate the library safety invariants of the destination
/// type; e.g.:
///
#[cfg_attr(bootstrap, doc = "```rust,ignore not runnable on bootstrap")]
#[cfg_attr(not(bootstrap), doc = "```compile_fail,E0277")]
/// #![feature(transmutability)]
/// use core::mem::BikeshedIntrinsicFrom;
/// use core::mem::TransmuteFrom;
///
/// let src: u8 = 3;
///
@ -219,18 +217,18 @@ pub struct Assume {
///
/// // SAFETY: No safety obligations.
/// let dst: EvenU8 = unsafe {
/// <_ as BikeshedIntrinsicFrom<_>>::transmute(src)
/// <_ as TransmuteFrom<_>>::transmute(src)
/// };
/// ```
///
/// When `true`, [`BikeshedIntrinsicFrom`] assumes that *you* have ensured
/// When `true`, [`TransmuteFrom`] assumes that *you* have ensured
/// that undefined behavior does not arise from using the transmuted value;
/// e.g.:
///
#[cfg_attr(bootstrap, doc = "```rust,ignore not runnable on bootstrap")]
#[cfg_attr(not(bootstrap), doc = "```rust")]
/// #![feature(transmutability)]
/// use core::mem::{Assume, BikeshedIntrinsicFrom};
/// use core::mem::{Assume, TransmuteFrom};
///
/// let src: u8 = 42;
///
@ -242,7 +240,7 @@ pub struct Assume {
/// let maybe_dst: Option<EvenU8> = if src % 2 == 0 {
/// // SAFETY: We have checked above that the value of `src` is even.
/// Some(unsafe {
/// <_ as BikeshedIntrinsicFrom<_, { Assume::SAFETY }>>::transmute(src)
/// <_ as TransmuteFrom<_, { Assume::SAFETY }>>::transmute(src)
/// })
/// } else {
/// None
@ -252,31 +250,31 @@ pub struct Assume {
/// ```
pub safety: bool,
/// When `false`, [`BikeshedIntrinsicFrom`] is not implemented for
/// transmutations that might violate the language-level bit-validity
/// invariant of the destination type; e.g.:
/// When `false`, [`TransmuteFrom`] is not implemented for transmutations
/// that might violate the language-level bit-validity invariant of the
/// destination type; e.g.:
///
#[cfg_attr(bootstrap, doc = "```rust,ignore not runnable on bootstrap")]
#[cfg_attr(not(bootstrap), doc = "```compile_fail,E0277")]
/// #![feature(transmutability)]
/// use core::mem::BikeshedIntrinsicFrom;
/// use core::mem::TransmuteFrom;
///
/// let src: u8 = 3;
///
/// // SAFETY: No safety obligations.
/// let dst: bool = unsafe {
/// <_ as BikeshedIntrinsicFrom<_>>::transmute(src)
/// <_ as TransmuteFrom<_>>::transmute(src)
/// };
/// ```
///
/// When `true`, [`BikeshedIntrinsicFrom`] assumes that *you* have ensured
/// When `true`, [`TransmuteFrom`] assumes that *you* have ensured
/// that the value being transmuted is a bit-valid instance of the
/// transmuted value; e.g.:
///
#[cfg_attr(bootstrap, doc = "```rust,ignore not runnable on bootstrap")]
#[cfg_attr(not(bootstrap), doc = "```rust")]
/// #![feature(transmutability)]
/// use core::mem::{Assume, BikeshedIntrinsicFrom};
/// use core::mem::{Assume, TransmuteFrom};
///
/// let src: u8 = 1;
///
@ -284,7 +282,7 @@ pub struct Assume {
/// // SAFETY: We have checked above that the value of `src` is a bit-valid
/// // instance of `bool`.
/// Some(unsafe {
/// <_ as BikeshedIntrinsicFrom<_, { Assume::VALIDITY }>>::transmute(src)
/// <_ as TransmuteFrom<_, { Assume::VALIDITY }>>::transmute(src)
/// })
/// } else {
/// None
@ -301,35 +299,34 @@ impl ConstParamTy_ for Assume {}
impl UnsizedConstParamTy for Assume {}
impl Assume {
/// With this, [`BikeshedIntrinsicFrom`] does not assume you have ensured
/// any safety obligations are met, and relies only upon its own analysis to
/// (dis)prove transmutability.
/// With this, [`TransmuteFrom`] does not assume you have ensured any safety
/// obligations are met, and relies only upon its own analysis to (dis)prove
/// transmutability.
#[unstable(feature = "transmutability", issue = "99571")]
pub const NOTHING: Self =
Self { alignment: false, lifetimes: false, safety: false, validity: false };
/// With this, [`BikeshedIntrinsicFrom`] assumes only that you have ensured
/// that references in the transmuted value satisfy the alignment
/// requirements of their referent types. See [`Assume::alignment`] for
/// examples.
/// With this, [`TransmuteFrom`] assumes only that you have ensured that
/// references in the transmuted value satisfy the alignment requirements of
/// their referent types. See [`Assume::alignment`] for examples.
#[unstable(feature = "transmutability", issue = "99571")]
pub const ALIGNMENT: Self = Self { alignment: true, ..Self::NOTHING };
/// With this, [`BikeshedIntrinsicFrom`] assumes only that you have ensured
/// that references in the transmuted value do not outlive their referents.
/// See [`Assume::lifetimes`] for examples.
/// With this, [`TransmuteFrom`] assumes only that you have ensured that
/// references in the transmuted value do not outlive their referents. See
/// [`Assume::lifetimes`] for examples.
#[unstable(feature = "transmutability", issue = "99571")]
pub const LIFETIMES: Self = Self { lifetimes: true, ..Self::NOTHING };
/// With this, [`BikeshedIntrinsicFrom`] assumes only that you have ensured
/// that undefined behavior does not arise from using the transmuted value.
/// See [`Assume::safety`] for examples.
/// With this, [`TransmuteFrom`] assumes only that you have ensured that
/// undefined behavior does not arise from using the transmuted value. See
/// [`Assume::safety`] for examples.
#[unstable(feature = "transmutability", issue = "99571")]
pub const SAFETY: Self = Self { safety: true, ..Self::NOTHING };
/// With this, [`BikeshedIntrinsicFrom`] assumes only that you have ensured
/// that the value being transmuted is a bit-valid instance of the
/// transmuted value. See [`Assume::validity`] for examples.
/// With this, [`TransmuteFrom`] assumes only that you have ensured that the
/// value being transmuted is a bit-valid instance of the transmuted value.
/// See [`Assume::validity`] for examples.
#[unstable(feature = "transmutability", issue = "99571")]
pub const VALIDITY: Self = Self { validity: true, ..Self::NOTHING };
@ -348,7 +345,7 @@ impl Assume {
/// transmutability,
/// )]
/// #![allow(incomplete_features)]
/// use core::mem::{align_of, Assume, BikeshedIntrinsicFrom};
/// use core::mem::{align_of, Assume, TransmuteFrom};
///
/// /// Attempts to transmute `src` to `&Dst`.
/// ///
@ -360,7 +357,7 @@ impl Assume {
/// /// alignment, are satisfied.
/// unsafe fn try_transmute_ref<'a, Src, Dst, const ASSUME: Assume>(src: &'a Src) -> Option<&'a Dst>
/// where
/// &'a Dst: BikeshedIntrinsicFrom<&'a Src, { ASSUME.and(Assume::ALIGNMENT) }>,
/// &'a Dst: TransmuteFrom<&'a Src, { ASSUME.and(Assume::ALIGNMENT) }>,
/// {
/// if <*const _>::is_aligned_to(src, align_of::<Dst>()) {
/// // SAFETY: By the above dynamic check, we have ensured that the address
@ -368,7 +365,7 @@ impl Assume {
/// // on the caller, the safety obligations required by `ASSUME` have also
/// // been satisfied.
/// Some(unsafe {
/// <_ as BikeshedIntrinsicFrom<_, { ASSUME.and(Assume::ALIGNMENT) }>>::transmute(src)
/// <_ as TransmuteFrom<_, { ASSUME.and(Assume::ALIGNMENT) }>>::transmute(src)
/// })
/// } else {
/// None

21
library/core/src/num/int_macros.rs
View file

@ -2888,8 +2888,8 @@ macro_rules! int_impl {
///
/// # Panics
///
/// This function will panic if `rhs` is 0 or if `self` is -1 and `rhs` is
/// `Self::MIN`. This behavior is not affected by the `overflow-checks` flag.
/// This function will panic if `rhs` is 0 or if `self` is `Self::MIN`
/// and `rhs` is -1. This behavior is not affected by the `overflow-checks` flag.
///
/// # Examples
///
@ -2927,8 +2927,8 @@ macro_rules! int_impl {
///
/// # Panics
///
/// This function will panic if `rhs` is 0 or if `self` is -1 and `rhs` is
/// `Self::MIN`. This behavior is not affected by the `overflow-checks` flag.
/// This function will panic if `rhs` is 0 or if `self` is `Self::MIN` and
/// `rhs` is -1. This behavior is not affected by the `overflow-checks` flag.
///
/// # Examples
///
@ -2943,6 +2943,11 @@ macro_rules! int_impl {
/// assert_eq!(a.rem_euclid(-b), 3);
/// assert_eq!((-a).rem_euclid(-b), 1);
/// ```
///
/// This will panic:
/// ```should_panic
#[doc = concat!("let _ = ", stringify!($SelfT), "::MIN.rem_euclid(-1);")]
/// ```
#[doc(alias = "modulo", alias = "mod")]
#[stable(feature = "euclidean_division", since = "1.38.0")]
#[rustc_const_stable(feature = "const_euclidean_int_methods", since = "1.52.0")]
@ -2971,8 +2976,8 @@ macro_rules! int_impl {
///
/// # Panics
///
/// This function will panic if `rhs` is 0 or if `self` is -1 and `rhs` is
/// `Self::MIN`. This behavior is not affected by the `overflow-checks` flag.
/// This function will panic if `rhs` is 0 or if `self` is `Self::MIN`
/// and `rhs` is -1. This behavior is not affected by the `overflow-checks` flag.
///
/// # Examples
///
@ -3007,8 +3012,8 @@ macro_rules! int_impl {
///
/// # Panics
///
/// This function will panic if `rhs` is 0 or if `self` is -1 and `rhs` is
/// `Self::MIN`. This behavior is not affected by the `overflow-checks` flag.
/// This function will panic if `rhs` is 0 or if `self` is `Self::MIN`
/// and `rhs` is -1. This behavior is not affected by the `overflow-checks` flag.
///
/// # Examples
///

1
library/core/src/panic/location.rs
View file

@ -195,6 +195,7 @@ impl<'a> Location<'a> {
#[stable(feature = "panic_hook_display", since = "1.26.0")]
impl fmt::Display for Location<'_> {
#[inline]
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(formatter, "{}:{}:{}", self.file, self.line, self.col)
}

21
library/core/src/pin.rs
View file

@ -1370,7 +1370,15 @@ impl<Ptr: Deref> Pin<Ptr> {
// SAFETY: see documentation on this function
unsafe { Pin::new_unchecked(&*self.__pointer) }
}
}
// These methods being in a `Ptr: DerefMut` impl block concerns semver stability.
// Currently, calling e.g. `.set()` on a `Pin<&T>` sees that `Ptr: DerefMut`
// doesn't hold, and goes to check for a `.set()` method on `T`. But, if the
// `where Ptr: DerefMut` bound is moved to the method, rustc sees the impl block
// as a valid candidate, and doesn't go on to check other candidates when it
// sees that the bound on the method.
impl<Ptr: DerefMut> Pin<Ptr> {
/// Gets a mutable reference to the pinned value this `Pin<Ptr>` points to.
///
/// This is a generic method to go from `&mut Pin<Pointer<T>>` to `Pin<&mut T>`.
@ -1402,10 +1410,7 @@ impl<Ptr: Deref> Pin<Ptr> {
/// ```
#[stable(feature = "pin", since = "1.33.0")]
#[inline(always)]
pub fn as_mut(&mut self) -> Pin<&mut Ptr::Target>
where
Ptr: DerefMut,
{
pub fn as_mut(&mut self) -> Pin<&mut Ptr::Target> {
// SAFETY: see documentation on this function
unsafe { Pin::new_unchecked(&mut *self.__pointer) }
}
@ -1420,10 +1425,7 @@ impl<Ptr: Deref> Pin<Ptr> {
#[unstable(feature = "pin_deref_mut", issue = "86918")]
#[must_use = "`self` will be dropped if the result is not used"]
#[inline(always)]
pub fn as_deref_mut(self: Pin<&mut Pin<Ptr>>) -> Pin<&mut Ptr::Target>
where
Ptr: DerefMut,
{
pub fn as_deref_mut(self: Pin<&mut Pin<Ptr>>) -> Pin<&mut Ptr::Target> {
// SAFETY: What we're asserting here is that going from
//
// Pin<&mut Pin<Ptr>>
@ -1475,12 +1477,13 @@ impl<Ptr: Deref> Pin<Ptr> {
#[inline(always)]
pub fn set(&mut self, value: Ptr::Target)
where
Ptr: DerefMut,
Ptr::Target: Sized,
{
*(self.__pointer) = value;
}
}
impl<Ptr: Deref> Pin<Ptr> {
/// Unwraps this `Pin<Ptr>`, returning the underlying `Ptr`.
///
/// # Safety

4
library/core/src/slice/mod.rs
View file

@ -3667,8 +3667,8 @@ impl<T> [T] {
{
// The panic code path was put into a cold function to not bloat the
// call site.
#[inline(never)]
#[cold]
#[cfg_attr(not(feature = "panic_immediate_abort"), inline(never), cold)]
#[cfg_attr(feature = "panic_immediate_abort", inline)]
#[track_caller]
fn len_mismatch_fail(dst_len: usize, src_len: usize) -> ! {
panic!(

3
library/core/src/slice/sort/shared/smallsort.rs
View file

@ -840,7 +840,8 @@ unsafe fn bidirectional_merge<T: FreezeMarker, F: FnMut(&T, &T) -> bool>(
}
}
#[inline(never)]
#[cfg_attr(not(feature = "panic_immediate_abort"), inline(never), cold)]
#[cfg_attr(feature = "panic_immediate_abort", inline)]
fn panic_on_ord_violation() -> ! {
// This is indicative of a logic bug in the user-provided comparison function or Ord
// implementation. They are expected to implement a total order as explained in the Ord

7
src/doc/unstable-book/src/language-features/struct-target-features.md Normal file
View file

@ -0,0 +1,7 @@
# `struct_target_features`
The tracking issue for this feature is: [#129107]
[#129107]: https://github.com/rust-lang/rust/issues/129107
------------------------

18
src/librustdoc/html/render/write_shared.rs
View file

@ -75,11 +75,11 @@ pub(crate) fn write_shared(
let crate_name = krate.name(cx.tcx());
let crate_name = crate_name.as_str(); // rand
let crate_name_json = OrderedJson::serialize(crate_name).unwrap(); // "rand"
let external_crates = hack_get_external_crate_names(&cx.dst)?;
let external_crates = hack_get_external_crate_names(&cx.dst, &cx.shared.resource_suffix)?;
let info = CrateInfo {
src_files_js: SourcesPart::get(cx, &crate_name_json)?,
search_index_js: SearchIndexPart::get(index, &cx.shared.resource_suffix)?,
all_crates: AllCratesPart::get(crate_name_json.clone())?,
all_crates: AllCratesPart::get(crate_name_json.clone(), &cx.shared.resource_suffix)?,
crates_index: CratesIndexPart::get(&crate_name, &external_crates)?,
trait_impl: TraitAliasPart::get(cx, &crate_name_json)?,
type_impl: TypeAliasPart::get(cx, krate, &crate_name_json)?,
@ -291,10 +291,13 @@ impl AllCratesPart {
SortedTemplate::from_before_after("window.ALL_CRATES = [", "];")
}
fn get(crate_name_json: OrderedJson) -> Result<PartsAndLocations<Self>, Error> {
fn get(
crate_name_json: OrderedJson,
resource_suffix: &str,
) -> Result<PartsAndLocations<Self>, Error> {
// external hack_get_external_crate_names not needed here, because
// there's no way that we write the search index but not crates.js
let path = PathBuf::from("crates.js");
let path = suffix_path("crates.js", resource_suffix);
Ok(PartsAndLocations::with(path, crate_name_json))
}
}
@ -305,8 +308,11 @@ impl AllCratesPart {
///
/// This is to match the current behavior of rustdoc, which allows you to get all crates
/// on the index page, even if --enable-index-page is only passed to the last crate.
fn hack_get_external_crate_names(doc_root: &Path) -> Result<Vec<String>, Error> {
let path = doc_root.join("crates.js");
fn hack_get_external_crate_names(
doc_root: &Path,
resource_suffix: &str,
) -> Result<Vec<String>, Error> {
let path = doc_root.join(suffix_path("crates.js", resource_suffix));
let Ok(content) = fs::read_to_string(&path) else {
// they didn't emit invocation specific, so we just say there were no crates
return Ok(Vec::default());

6
src/librustdoc/html/render/write_shared/tests.rs
View file

@ -6,10 +6,10 @@ use crate::html::render::write_shared::*;
fn hack_external_crate_names() {
let path = tempfile::TempDir::new().unwrap();
let path = path.path();
let crates = hack_get_external_crate_names(&path).unwrap();
let crates = hack_get_external_crate_names(&path, "").unwrap();
assert!(crates.is_empty());
fs::write(path.join("crates.js"), r#"window.ALL_CRATES = ["a","b","c"];"#).unwrap();
let crates = hack_get_external_crate_names(&path).unwrap();
let crates = hack_get_external_crate_names(&path, "").unwrap();
assert_eq!(crates, ["a".to_string(), "b".to_string(), "c".to_string()]);
}
@ -60,7 +60,7 @@ fn all_crates_template() {
#[test]
fn all_crates_parts() {
let parts = AllCratesPart::get(OrderedJson::serialize("crate").unwrap()).unwrap();
let parts = AllCratesPart::get(OrderedJson::serialize("crate").unwrap(), "").unwrap();
assert_eq!(&parts.parts[0].0, Path::new("crates.js"));
assert_eq!(&parts.parts[0].1.to_string(), r#""crate""#);
}

46
src/tools/miri/src/machine.rs
View file

@ -946,16 +946,48 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
ecx.machine.validation == ValidationMode::Deep
}
#[inline(always)]
fn enforce_abi(_ecx: &MiriInterpCx<'tcx>) -> bool {
true
}
#[inline(always)]
fn ignore_optional_overflow_checks(ecx: &MiriInterpCx<'tcx>) -> bool {
!ecx.tcx.sess.overflow_checks()
}
fn check_fn_target_features(
ecx: &MiriInterpCx<'tcx>,
instance: ty::Instance<'tcx>,
) -> InterpResult<'tcx> {
let attrs = ecx.tcx.codegen_fn_attrs(instance.def_id());
if attrs
.target_features
.iter()
.any(|feature| !ecx.tcx.sess.target_features.contains(&feature.name))
{
let unavailable = attrs
.target_features
.iter()
.filter(|&feature| {
!feature.implied && !ecx.tcx.sess.target_features.contains(&feature.name)
})
.fold(String::new(), |mut s, feature| {
if !s.is_empty() {
s.push_str(", ");
}
s.push_str(feature.name.as_str());
s
});
let msg = format!(
"calling a function that requires unavailable target features: {unavailable}"
);
// On WASM, this is not UB, but instead gets rejected during validation of the module
// (see #84988).
if ecx.tcx.sess.target.is_like_wasm {
throw_machine_stop!(TerminationInfo::Abort(msg));
} else {
throw_ub_format!("{msg}");
}
}
Ok(())
}
#[inline(always)]
fn find_mir_or_eval_fn(
ecx: &mut MiriInterpCx<'tcx>,
@ -1060,6 +1092,10 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
ecx.generate_nan(inputs)
}
fn ub_checks(ecx: &InterpCx<'tcx, Self>) -> InterpResult<'tcx, bool> {
Ok(ecx.tcx.sess.ub_checks())
}
fn thread_local_static_pointer(
ecx: &mut MiriInterpCx<'tcx>,
def_id: DefId,

4
src/tools/miri/tests/pass/function_calls/target_feature_wasm.rs → src/tools/miri/tests/panic/target_feature_wasm.rs
View file

@ -2,7 +2,9 @@
//@compile-flags: -C target-feature=-simd128
fn main() {
// Calling functions with `#[target_feature]` is not unsound on WASM, see #84988
// Calling functions with `#[target_feature]` is not unsound on WASM, see #84988.
// But if the compiler actually uses the target feature, it will lead to an error when the module is loaded.
// We emulate this with an "unsupported" error.
assert!(!cfg!(target_feature = "simd128"));
simd128_fn();
}

37
tests/assembly/struct-target-features.rs Normal file
View file

@ -0,0 +1,37 @@
//@ compile-flags: -O
//@ assembly-output: emit-asm
//@ only-x86_64
#![crate_type = "lib"]
#![feature(struct_target_features)]
// Check that a struct_target_features type causes the compiler to effectively inline intrinsics.
use std::arch::x86_64::*;
#[target_feature(enable = "avx")]
struct Avx {}
#[target_feature(enable = "fma")]
struct Fma {}
pub fn add_simple(_: Avx, v: __m256) -> __m256 {
// CHECK-NOT: call
// CHECK: vaddps
unsafe { _mm256_add_ps(v, v) }
}
pub fn add_complex_type(_: (&Avx, ()), v: __m256) -> __m256 {
// CHECK-NOT: call
// CHECK: vaddps
unsafe { _mm256_add_ps(v, v) }
}
pub fn add_fma_combined(_: (&Avx, &Fma), v: __m256) -> (__m256, __m256) {
// CHECK-NOT: call
// CHECK-DAG: vaddps
let r1 = unsafe { _mm256_add_ps(v, v) };
// CHECK-DAG: vfmadd213ps
let r2 = unsafe { _mm256_fmadd_ps(v, v, v) };
(r1, r2)
}

20
tests/codegen/naked-fn/aligned.rs Normal file
View file

@ -0,0 +1,20 @@
//@ compile-flags: -C no-prepopulate-passes -Copt-level=0
//@ needs-asm-support
//@ ignore-arm no "ret" mnemonic
#![crate_type = "lib"]
#![feature(naked_functions, fn_align)]
use std::arch::asm;
// CHECK: Function Attrs: naked
// CHECK-NEXT: define{{.*}}void @naked_empty()
// CHECK: align 16
#[repr(align(16))]
#[no_mangle]
#[naked]
pub unsafe extern "C" fn naked_empty() {
// CHECK-NEXT: start:
// CHECK-NEXT: call void asm
// CHECK-NEXT: unreachable
asm!("ret", options(noreturn));
}

4
tests/crashes/123693.rs
View file

@ -3,11 +3,11 @@
#![feature(transmutability)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, { Assume::NOTHING }>,
Dst: TransmuteFrom<Src, { Assume::NOTHING }>,
{
}
}

2
tests/crashes/124207.rs
View file

@ -4,6 +4,6 @@
trait OpaqueTrait {}
type OpaqueType = impl OpaqueTrait;
trait AnotherTrait {}
impl<T: std::mem::BikeshedIntrinsicFrom<(), ()>> AnotherTrait for T {}
impl<T: std::mem::TransmuteFrom<(), ()>> AnotherTrait for T {}
impl AnotherTrait for OpaqueType {}
pub fn main() {}

2
tests/crashes/125881.rs
View file

@ -3,6 +3,6 @@
#![feature(transmutability)]
#![feature(unboxed_closures,effects)]
const fn test() -> impl std::mem::BikeshedIntrinsicFrom() {
const fn test() -> impl std::mem::TransmuteFrom() {
|| {}
}

4
tests/crashes/126267.rs
View file

@ -14,11 +14,11 @@ pub enum Error {
}
mod assert {
use std::mem::BikeshedIntrinsicFrom;
use std::mem::TransmuteFrom;
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src>, // safety is NOT assumed
Dst: TransmuteFrom<Src>, // safety is NOT assumed
{
}
}

4
tests/crashes/126377.rs
View file

@ -4,7 +4,7 @@
#![feature(generic_const_exprs)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<
Src,
@ -15,7 +15,7 @@ mod assert {
const ASSUME_VALIDITY: bool,
>()
where
Dst: BikeshedIntrinsicFrom<
Dst: TransmuteFrom<
Src,
{ }
>,

4
tests/crashes/126966.rs
View file

@ -1,10 +1,10 @@
//@ known-bug: rust-lang/rust#126966
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src>,
Dst: TransmuteFrom<Src>,
{
}
}

1
tests/run-make/emit-shared-files/rmake.rs
View file

@ -20,6 +20,7 @@ fn main() {
.input("x.rs")
.run();
assert!(Path::new("invocation-only/search-index-xxx.js").exists());
assert!(Path::new("invocation-only/crates-xxx.js").exists());
assert!(Path::new("invocation-only/settings.html").exists());
assert!(Path::new("invocation-only/x/all.html").exists());
assert!(Path::new("invocation-only/x/index.html").exists());

48
tests/ui/asm/naked-with-invalid-repr-attr.rs Normal file
View file

@ -0,0 +1,48 @@
//@ needs-asm-support
#![feature(naked_functions)]
#![feature(fn_align)]
#![crate_type = "lib"]
use std::arch::asm;
#[repr(C)]
//~^ ERROR attribute should be applied to a struct, enum, or union [E0517]
#[naked]
extern "C" fn example1() {
//~^ NOTE not a struct, enum, or union
unsafe { asm!("", options(noreturn)) }
}
#[repr(transparent)]
//~^ ERROR attribute should be applied to a struct, enum, or union [E0517]
#[naked]
extern "C" fn example2() {
//~^ NOTE not a struct, enum, or union
unsafe { asm!("", options(noreturn)) }
}
#[repr(align(16), C)]
//~^ ERROR attribute should be applied to a struct, enum, or union [E0517]
#[naked]
extern "C" fn example3() {
//~^ NOTE not a struct, enum, or union
unsafe { asm!("", options(noreturn)) }
}
// note: two errors because of packed and C
#[repr(C, packed)]
//~^ ERROR attribute should be applied to a struct or union [E0517]
//~| ERROR attribute should be applied to a struct, enum, or union [E0517]
#[naked]
extern "C" fn example4() {
//~^ NOTE not a struct, enum, or union
//~| NOTE not a struct or union
unsafe { asm!("", options(noreturn)) }
}
#[repr(u8)]
//~^ ERROR attribute should be applied to an enum [E0517]
#[naked]
extern "C" fn example5() {
//~^ NOTE not an enum
unsafe { asm!("", options(noreturn)) }
}

77
tests/ui/asm/naked-with-invalid-repr-attr.stderr Normal file
View file

@ -0,0 +1,77 @@
error[E0517]: attribute should be applied to a struct, enum, or union
--> $DIR/naked-with-invalid-repr-attr.rs:7:8
|
LL | #[repr(C)]
| ^
...
LL | / extern "C" fn example1() {
LL | |
LL | | unsafe { asm!("", options(noreturn)) }
LL | | }
| |_- not a struct, enum, or union
error[E0517]: attribute should be applied to a struct, enum, or union
--> $DIR/naked-with-invalid-repr-attr.rs:15:8
|
LL | #[repr(transparent)]
| ^^^^^^^^^^^
...
LL | / extern "C" fn example2() {
LL | |
LL | | unsafe { asm!("", options(noreturn)) }
LL | | }
| |_- not a struct, enum, or union
error[E0517]: attribute should be applied to a struct, enum, or union
--> $DIR/naked-with-invalid-repr-attr.rs:23:19
|
LL | #[repr(align(16), C)]
| ^
...
LL | / extern "C" fn example3() {
LL | |
LL | | unsafe { asm!("", options(noreturn)) }
LL | | }
| |_- not a struct, enum, or union
error[E0517]: attribute should be applied to a struct, enum, or union
--> $DIR/naked-with-invalid-repr-attr.rs:32:8
|
LL | #[repr(C, packed)]
| ^
...
LL | / extern "C" fn example4() {
LL | |
LL | |
LL | | unsafe { asm!("", options(noreturn)) }
LL | | }
| |_- not a struct, enum, or union
error[E0517]: attribute should be applied to a struct or union
--> $DIR/naked-with-invalid-repr-attr.rs:32:11
|
LL | #[repr(C, packed)]
| ^^^^^^
...
LL | / extern "C" fn example4() {
LL | |
LL | |
LL | | unsafe { asm!("", options(noreturn)) }
LL | | }
| |_- not a struct or union
error[E0517]: attribute should be applied to an enum
--> $DIR/naked-with-invalid-repr-attr.rs:42:8
|
LL | #[repr(u8)]
| ^^
...
LL | / extern "C" fn example5() {
LL | |
LL | | unsafe { asm!("", options(noreturn)) }
LL | | }
| |_- not an enum
error: aborting due to 6 previous errors
For more information about this error, try `rustc --explain E0517`.

5
tests/ui/associated-inherent-types/bugs/cycle-iat-inside-of-adt.stderr
View file

@ -4,11 +4,6 @@ error[E0391]: cycle detected when computing predicates of `Foo`
LL | struct Foo {
| ^^^^^^^^^^
|
note: ...which requires computing predicates of `Foo`...
--> $DIR/cycle-iat-inside-of-adt.rs:7:1
|
LL | struct Foo {
| ^^^^^^^^^^
note: ...which requires computing inferred outlives predicates of `Foo`...
--> $DIR/cycle-iat-inside-of-adt.rs:7:1
|

5
tests/ui/associated-inherent-types/bugs/cycle-iat-inside-of-where-predicate.stderr
View file

@ -4,11 +4,6 @@ error[E0391]: cycle detected when computing predicates of `user`
LL | fn user<T>() where S<T>::P: std::fmt::Debug {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: ...which requires computing predicates of `user`...
--> $DIR/cycle-iat-inside-of-where-predicate.rs:8:1
|
LL | fn user<T>() where S<T>::P: std::fmt::Debug {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires computing explicit predicates of `user`...
--> $DIR/cycle-iat-inside-of-where-predicate.rs:8:1
|

4
tests/ui/const-generics/adt_const_params/transmutable-ice-110969.rs
View file

@ -4,11 +4,11 @@
#![allow(incomplete_features, unstable_features)]
mod assert {
use std::mem::BikeshedIntrinsicFrom;
use std::mem::TransmuteFrom;
pub fn is_transmutable<Src, Dst, Context, const ASSUME: std::mem::Assume>()
where
Dst: BikeshedIntrinsicFrom<Src, Context, ASSUME>,
Dst: TransmuteFrom<Src, Context, ASSUME>,
//~^ ERROR trait takes at most 2 generic arguments but 3 generic arguments were supplied
{
}

4
tests/ui/const-generics/adt_const_params/transmutable-ice-110969.stderr
View file

@ -1,8 +1,8 @@
error[E0107]: trait takes at most 2 generic arguments but 3 generic arguments were supplied
--> $DIR/transmutable-ice-110969.rs:11:14
|
LL | Dst: BikeshedIntrinsicFrom<Src, Context, ASSUME>,
| ^^^^^^^^^^^^^^^^^^^^^ -------- help: remove the unnecessary generic argument
LL | Dst: TransmuteFrom<Src, Context, ASSUME>,
| ^^^^^^^^^^^^^ -------- help: remove the unnecessary generic argument
| |
| expected at most 2 generic arguments

4
tests/ui/consts/const-eval/const_fn_target_feature.rs
View file

@ -1,6 +1,7 @@
//@ only-x86_64
// Set the base cpu explicitly, in case the default has been changed.
//@ compile-flags: -C target-cpu=x86-64 -C target-feature=+ssse3
//@ check-pass
#![crate_type = "lib"]
@ -9,7 +10,8 @@ const A: () = unsafe { ssse3_fn() };
// error (avx2 not enabled at compile time)
const B: () = unsafe { avx2_fn() };
//~^ ERROR evaluation of constant value failed
// FIXME: currently we do not detect this UB, since we don't want the result of const-eval
// to depend on `tcx.sess` which can differ between crates in a crate graph.
#[target_feature(enable = "ssse3")]
const unsafe fn ssse3_fn() {}

9
tests/ui/consts/const-eval/const_fn_target_feature.stderr
View file

@ -1,9 +0,0 @@
error[E0080]: evaluation of constant value failed
--> $DIR/const_fn_target_feature.rs:11:24
|
LL | const B: () = unsafe { avx2_fn() };
| ^^^^^^^^^ calling a function that requires unavailable target features: avx2
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0080`.

4
tests/ui/consts/const-eval/const_fn_target_feature_wasm.rs
View file

@ -7,7 +7,9 @@
#[cfg(target_feature = "simd128")]
compile_error!("simd128 target feature should be disabled");
// Calling functions with `#[target_feature]` is not unsound on WASM, see #84988
// Calling functions with `#[target_feature]` is not unsound on WASM, see #84988.
// (It can still lead to a runtime error though so we'd be in our right to abort execution,
// just not to declare it UB.)
const A: () = simd128_fn();
#[target_feature(enable = "simd128")]

4
tests/ui/feature-gates/feature-gate-struct-target-features.rs Normal file
View file

@ -0,0 +1,4 @@
#[target_feature(enable = "avx")] //~ ERROR attribute should be applied to a function definition
struct Avx {}
fn main() {}

10
tests/ui/feature-gates/feature-gate-struct-target-features.stderr Normal file
View file

@ -0,0 +1,10 @@
error: attribute should be applied to a function definition
--> $DIR/feature-gate-struct-target-features.rs:1:1
|
LL | #[target_feature(enable = "avx")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
LL | struct Avx {}
| ------------- not a function definition
error: aborting due to 1 previous error

8
tests/ui/intrinsics/intrinsic-raw_eq-const-bad.rs
View file

@ -13,5 +13,13 @@ const RAW_EQ_PTR: bool = unsafe {
//~| unable to turn pointer into integer
};
const RAW_EQ_NOT_ALIGNED: bool = unsafe {
let arr = [0u8; 4];
let aref = &*arr.as_ptr().cast::<i32>();
std::intrinsics::raw_eq(aref, aref)
//~^ ERROR evaluation of constant value failed
//~| alignment
};
pub fn main() {
}

8
tests/ui/intrinsics/intrinsic-raw_eq-const-bad.stderr
View file

@ -13,6 +13,12 @@ LL | std::intrinsics::raw_eq(&(&0), &(&1))
= help: this code performed an operation that depends on the underlying bytes representing a pointer
= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
error: aborting due to 2 previous errors
error[E0080]: evaluation of constant value failed
--> $DIR/intrinsic-raw_eq-const-bad.rs:19:5
|
LL | std::intrinsics::raw_eq(aref, aref)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ accessing memory with alignment 1, but alignment 4 is required
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0080`.

98
tests/ui/target-feature/struct-target-features.rs Normal file
View file

@ -0,0 +1,98 @@
//@ only-x86_64
#![feature(struct_target_features)]
//~^ WARNING the feature `struct_target_features` is incomplete and may not be safe to use and/or cause compiler crashes
#![feature(target_feature_11)]
use std::arch::x86_64::*;
#[target_feature(enable = "avx")]
//~^ ERROR attribute should be applied to a function definition or unit struct
struct Invalid(u32);
#[target_feature(enable = "avx")]
struct Avx {}
#[target_feature(enable = "sse")]
struct Sse();
#[target_feature(enable = "avx")]
fn avx() {}
trait TFAssociatedType {
type Assoc;
}
impl TFAssociatedType for () {
type Assoc = Avx;
}
fn avx_self(_: <() as TFAssociatedType>::Assoc) {
avx();
}
fn avx_avx(_: Avx) {
avx();
}
extern "C" fn bad_fun(_: Avx) {}
//~^ ERROR cannot use a struct with target features in a function with non-Rust ABI
#[inline(always)]
//~^ ERROR cannot use `#[inline(always)]` with `#[target_feature]`
fn inline_fun(_: Avx) {}
//~^ ERROR cannot use a struct with target features in a #[inline(always)] function
trait Simd {
fn do_something(&self);
}
impl Simd for Avx {
fn do_something(&self) {
unsafe {
println!("{:?}", _mm256_setzero_ps());
}
}
}
impl Simd for Sse {
fn do_something(&self) {
unsafe {
println!("{:?}", _mm_setzero_ps());
}
}
}
struct WithAvx {
#[allow(dead_code)]
avx: Avx,
}
impl Simd for WithAvx {
fn do_something(&self) {
unsafe {
println!("{:?}", _mm256_setzero_ps());
}
}
}
#[inline(never)]
fn dosomething<S: Simd>(simd: &S) {
simd.do_something();
}
fn avxfn(_: &Avx) {}
fn main() {
Avx {};
//~^ ERROR initializing type with `target_feature` attr is unsafe and requires unsafe function or block [E0133]
if is_x86_feature_detected!("avx") {
let avx = unsafe { Avx {} };
avxfn(&avx);
dosomething(&avx);
dosomething(&WithAvx { avx });
}
if is_x86_feature_detected!("sse") {
dosomething(&unsafe { Sse {} })
}
}

47
tests/ui/target-feature/struct-target-features.stderr Normal file
View file

@ -0,0 +1,47 @@
warning: the feature `struct_target_features` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/struct-target-features.rs:2:12
|
LL | #![feature(struct_target_features)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #129107 <https://github.com/rust-lang/rust/issues/129107> for more information
= note: `#[warn(incomplete_features)]` on by default
error: attribute should be applied to a function definition or unit struct
--> $DIR/struct-target-features.rs:8:1
|
LL | #[target_feature(enable = "avx")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
LL |
LL | struct Invalid(u32);
| -------------------- not a function definition or a unit struct
error: cannot use a struct with target features in a function with non-Rust ABI
--> $DIR/struct-target-features.rs:37:1
|
LL | extern "C" fn bad_fun(_: Avx) {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: cannot use a struct with target features in a #[inline(always)] function
--> $DIR/struct-target-features.rs:42:1
|
LL | fn inline_fun(_: Avx) {}
| ^^^^^^^^^^^^^^^^^^^^^
error: cannot use `#[inline(always)]` with `#[target_feature]`
--> $DIR/struct-target-features.rs:40:1
|
LL | #[inline(always)]
| ^^^^^^^^^^^^^^^^^
error[E0133]: initializing type with `target_feature` attr is unsafe and requires unsafe function or block
--> $DIR/struct-target-features.rs:86:5
|
LL | Avx {};
| ^^^^^^ initializing type with `target_feature` attr
|
= note: this struct can only be constructed if the corresponding `target_feature`s are available
error: aborting due to 5 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0133`.

4
tests/ui/transmutability/abstraction/abstracted_assume.rs
View file

@ -8,7 +8,7 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::BikeshedIntrinsicFrom;
use std::mem::TransmuteFrom;
pub fn is_transmutable<
Src,
@ -16,7 +16,7 @@ mod assert {
const ASSUME: std::mem::Assume,
>()
where
Dst: BikeshedIntrinsicFrom<
Dst: TransmuteFrom<
Src,
ASSUME,
>,

6
tests/ui/transmutability/abstraction/const_generic_fn.rs
View file

@ -6,12 +6,12 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn array_like<T, E, const N: usize>()
where
T: BikeshedIntrinsicFrom<[E; N], { Assume::SAFETY }>,
[E; N]: BikeshedIntrinsicFrom<T, { Assume::SAFETY }>
T: TransmuteFrom<[E; N], { Assume::SAFETY }>,
[E; N]: TransmuteFrom<T, { Assume::SAFETY }>
{}
}

4
tests/ui/transmutability/alignment/align-fail.rs
View file

@ -2,11 +2,11 @@
#![feature(transmutability)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: false,
lifetimes: true,

2
tests/ui/transmutability/alignment/align-fail.stderr
View file

@ -10,7 +10,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: false,

4
tests/ui/transmutability/alignment/align-pass.rs
View file

@ -2,11 +2,11 @@
#![feature(transmutability)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: false,
lifetimes: false,

4
tests/ui/transmutability/arrays/huge-len.rs
View file

@ -1,11 +1,11 @@
#![crate_type = "lib"]
#![feature(transmutability)]
mod assert {
use std::mem::BikeshedIntrinsicFrom;
use std::mem::TransmuteFrom;
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src>,
Dst: TransmuteFrom<Src>,
{
}
}

8
tests/ui/transmutability/arrays/huge-len.stderr
View file

@ -10,8 +10,8 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
LL | Dst: TransmuteFrom<Src>,
| ^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
error[E0277]: `ExplicitlyPadded` cannot be safely transmuted into `()`
--> $DIR/huge-len.rs:24:55
@ -25,8 +25,8 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
LL | Dst: TransmuteFrom<Src>,
| ^^^^^^^^^^^^^^^^^^ required by this bound in `is_maybe_transmutable`
error: aborting due to 2 previous errors

4
tests/ui/transmutability/arrays/issue-103783-array-length.rs
View file

@ -3,11 +3,11 @@
#![allow(dead_code)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<
Dst: TransmuteFrom<
Src,
{ Assume { alignment: true, lifetimes: true, safety: true, validity: true } },
>,

4
tests/ui/transmutability/arrays/should_have_correct_length.rs
View file

@ -6,11 +6,11 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, { Assume::SAFETY.and(Assume::VALIDITY) }>
Dst: TransmuteFrom<Src, { Assume::SAFETY.and(Assume::VALIDITY) }>
{}
}

4
tests/ui/transmutability/arrays/should_inherit_alignment.rs
View file

@ -6,11 +6,11 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume::ALIGNMENT
.and(Assume::LIFETIMES)
.and(Assume::SAFETY)

4
tests/ui/transmutability/arrays/should_require_well_defined_layout.rs
View file

@ -5,11 +5,11 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume::ALIGNMENT
.and(Assume::LIFETIMES)
.and(Assume::SAFETY)

12
tests/ui/transmutability/arrays/should_require_well_defined_layout.stderr
View file

@ -10,7 +10,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)
@ -31,7 +31,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)
@ -52,7 +52,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)
@ -73,7 +73,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)
@ -94,7 +94,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)
@ -115,7 +115,7 @@ note: required by a bound in `is_maybe_transmutable`
LL | pub fn is_maybe_transmutable<Src, Dst>()
| --------------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)

6
tests/ui/transmutability/enums/niche_optimization.rs
View file

@ -5,11 +5,11 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: false,
lifetimes: false,
@ -21,7 +21,7 @@ mod assert {
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: false,
lifetimes: false,

6
tests/ui/transmutability/enums/repr/padding_differences.rs
View file

@ -7,11 +7,11 @@
use std::mem::MaybeUninit;
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: false,
lifetimes: false,
@ -23,7 +23,7 @@ mod assert {
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: false,
lifetimes: false,

4
tests/ui/transmutability/enums/repr/primitive_reprs_should_have_correct_length.rs
View file

@ -5,11 +5,11 @@
#![allow(dead_code)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: true,
lifetimes: true,

40
tests/ui/transmutability/enums/repr/primitive_reprs_should_have_correct_length.stderr
View file

@ -10,7 +10,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -32,7 +32,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -54,7 +54,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -76,7 +76,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -98,7 +98,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -120,7 +120,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -142,7 +142,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -164,7 +164,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -186,7 +186,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -208,7 +208,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -230,7 +230,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -252,7 +252,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -274,7 +274,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -296,7 +296,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -318,7 +318,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -340,7 +340,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -362,7 +362,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -384,7 +384,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -406,7 +406,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,
@ -428,7 +428,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume {
LL | | alignment: true,

4
tests/ui/transmutability/enums/repr/should_handle_all.rs
View file

@ -5,11 +5,11 @@
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume {
alignment: true,
lifetimes: true,

4
tests/ui/transmutability/enums/should_order_correctly.rs
View file

@ -6,11 +6,11 @@
#![allow(dead_code)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume::ALIGNMENT
.and(Assume::LIFETIMES)
.and(Assume::SAFETY)

4
tests/ui/transmutability/enums/should_pad_variants.rs
View file

@ -6,11 +6,11 @@
#![allow(dead_code)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume::ALIGNMENT
.and(Assume::LIFETIMES)
.and(Assume::SAFETY)

2
tests/ui/transmutability/enums/should_pad_variants.stderr
View file

@ -10,7 +10,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)

4
tests/ui/transmutability/enums/should_respect_endianness.rs
View file

@ -6,11 +6,11 @@
#![allow(dead_code)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: BikeshedIntrinsicFrom<Src, {
Dst: TransmuteFrom<Src, {
Assume::ALIGNMENT
.and(Assume::LIFETIMES)
.and(Assume::SAFETY)

2
tests/ui/transmutability/enums/should_respect_endianness.stderr
View file

@ -10,7 +10,7 @@ note: required by a bound in `is_transmutable`
LL | pub fn is_transmutable<Src, Dst>()
| --------------- required by a bound in this function
LL | where
LL | Dst: BikeshedIntrinsicFrom<Src, {
LL | Dst: TransmuteFrom<Src, {
| ______________^
LL | | Assume::ALIGNMENT
LL | | .and(Assume::LIFETIMES)

2
tests/ui/transmutability/enums/uninhabited_optimization.rs
View file

@ -4,7 +4,7 @@
fn assert_transmutable<T>()
where
(): std::mem::BikeshedIntrinsicFrom<T>
(): std::mem::TransmuteFrom<T>
{}
enum Uninhabited {}

4
tests/ui/transmutability/issue-101739-1.rs
View file

@ -1,11 +1,11 @@
#![feature(transmutability)]
mod assert {
use std::mem::BikeshedIntrinsicFrom;
use std::mem::TransmuteFrom;
pub fn is_transmutable<Src, const ASSUME_ALIGNMENT: bool>()
where
Dst: BikeshedIntrinsicFrom<Src, ASSUME_ALIGNMENT>, //~ ERROR cannot find type `Dst` in this scope
Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>, //~ ERROR cannot find type `Dst` in this scope
//~| the constant `ASSUME_ALIGNMENT` is not of type `Assume`
//~| ERROR: mismatched types
{

14
tests/ui/transmutability/issue-101739-1.stderr
View file

@ -1,23 +1,23 @@
error[E0412]: cannot find type `Dst` in this scope
--> $DIR/issue-101739-1.rs:8:9
|
LL | Dst: BikeshedIntrinsicFrom<Src, ASSUME_ALIGNMENT>,
LL | Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>,
| ^^^ not found in this scope
error: the constant `ASSUME_ALIGNMENT` is not of type `Assume`
--> $DIR/issue-101739-1.rs:8:14
|
LL | Dst: BikeshedIntrinsicFrom<Src, ASSUME_ALIGNMENT>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Assume`, found `bool`
LL | Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Assume`, found `bool`
|
note: required by a const generic parameter in `BikeshedIntrinsicFrom`
note: required by a const generic parameter in `TransmuteFrom`
--> $SRC_DIR/core/src/mem/transmutability.rs:LL:COL
error[E0308]: mismatched types
--> $DIR/issue-101739-1.rs:8:41
--> $DIR/issue-101739-1.rs:8:33
|
LL | Dst: BikeshedIntrinsicFrom<Src, ASSUME_ALIGNMENT>,
| ^^^^^^^^^^^^^^^^ expected `Assume`, found `bool`
LL | Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>,
| ^^^^^^^^^^^^^^^^ expected `Assume`, found `bool`
error: aborting due to 3 previous errors

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