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Auto merge of #102926 - matthiaskrgr:rollup-oe2cdzj, r=matthiaskrgr
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Rollup of 11 pull requests

Successful merges:

 - #100387 (Check uniqueness of impl items by trait item when applicable.)
 - #101727 (Stabilize map_first_last)
 - #101774 (Warn about safety of `fetch_update`)
 - #102227 (fs::get_path solarish version.)
 - #102445 (Add `is_empty()` method to `core::ffi::CStr`.)
 - #102612 (Migrate `codegen_ssa` to diagnostics structs - [Part 1])
 - #102685 (Interpret EH actions properly)
 - #102869 (Add basename and dirname aliases)
 - #102889 (rustc_hir: Less error-prone methods for accessing `PartialRes` resolution)
 - #102893 (Fix ICE #102878)
 - #102912 (:arrow_up: rust-analyzer)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
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@bors
bors committed Oct 11, 2022
2 parents cde693c + 3e01d07 commit db0597f
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Showing 163 changed files with 3,790 additions and 1,349 deletions.
11 changes: 4 additions & 7 deletions compiler/rustc_ast_lowering/src/asm.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -205,13 +205,10 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
let static_def_id = self
.resolver
.get_partial_res(sym.id)
.filter(|res| res.unresolved_segments() == 0)
.and_then(|res| {
if let Res::Def(DefKind::Static(_), def_id) = res.base_res() {
Some(def_id)
} else {
None
}
.and_then(|res| res.full_res())
.and_then(|res| match res {
Res::Def(DefKind::Static(_), def_id) => Some(def_id),
_ => None,
});

if let Some(def_id) = static_def_id {
Expand Down
8 changes: 2 additions & 6 deletions compiler/rustc_ast_lowering/src/expr.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1044,9 +1044,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
if let ExprKind::Path(qself, path) = &expr.kind {
// Does the path resolve to something disallowed in a tuple struct/variant pattern?
if let Some(partial_res) = self.resolver.get_partial_res(expr.id) {
if partial_res.unresolved_segments() == 0
&& !partial_res.base_res().expected_in_tuple_struct_pat()
{
if let Some(res) = partial_res.full_res() && !res.expected_in_tuple_struct_pat() {
return None;
}
}
Expand All @@ -1066,9 +1064,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
if let ExprKind::Path(qself, path) = &expr.kind {
// Does the path resolve to something disallowed in a unit struct/variant pattern?
if let Some(partial_res) = self.resolver.get_partial_res(expr.id) {
if partial_res.unresolved_segments() == 0
&& !partial_res.base_res().expected_in_unit_struct_pat()
{
if let Some(res) = partial_res.full_res() && !res.expected_in_unit_struct_pat() {
return None;
}
}
Expand Down
9 changes: 6 additions & 3 deletions compiler/rustc_ast_lowering/src/item.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -947,7 +947,10 @@ impl<'hir> LoweringContext<'_, 'hir> {
}
AssocItemKind::MacCall(..) => unimplemented!(),
},
trait_item_def_id: self.resolver.get_partial_res(i.id).map(|r| r.base_res().def_id()),
trait_item_def_id: self
.resolver
.get_partial_res(i.id)
.map(|r| r.expect_full_res().def_id()),
}
}

Expand Down Expand Up @@ -1349,9 +1352,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
match self
.resolver
.get_partial_res(bound_pred.bounded_ty.id)
.map(|d| (d.base_res(), d.unresolved_segments()))
.and_then(|r| r.full_res())
{
Some((Res::Def(DefKind::TyParam, def_id), 0))
Some(Res::Def(DefKind::TyParam, def_id))
if bound_pred.bound_generic_params.is_empty() =>
{
generics
Expand Down
24 changes: 8 additions & 16 deletions compiler/rustc_ast_lowering/src/lib.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -175,12 +175,7 @@ impl ResolverAstLoweringExt for ResolverAstLowering {
return None;
}

let partial_res = self.partial_res_map.get(&expr.id)?;
if partial_res.unresolved_segments() != 0 {
return None;
}

if let Res::Def(DefKind::Fn, def_id) = partial_res.base_res() {
if let Res::Def(DefKind::Fn, def_id) = self.partial_res_map.get(&expr.id)?.full_res()? {
// We only support cross-crate argument rewriting. Uses
// within the same crate should be updated to use the new
// const generics style.
Expand Down Expand Up @@ -753,12 +748,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}

fn expect_full_res(&mut self, id: NodeId) -> Res<NodeId> {
self.resolver.get_partial_res(id).map_or(Res::Err, |pr| {
if pr.unresolved_segments() != 0 {
panic!("path not fully resolved: {:?}", pr);
}
pr.base_res()
})
self.resolver.get_partial_res(id).map_or(Res::Err, |pr| pr.expect_full_res())
}

fn expect_full_res_from_use(&mut self, id: NodeId) -> impl Iterator<Item = Res<NodeId>> {
Expand Down Expand Up @@ -1138,8 +1128,11 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
// type and value namespaces. If we resolved the path in the value namespace, we
// transform it into a generic const argument.
TyKind::Path(ref qself, ref path) => {
if let Some(partial_res) = self.resolver.get_partial_res(ty.id) {
let res = partial_res.base_res();
if let Some(res) = self
.resolver
.get_partial_res(ty.id)
.and_then(|partial_res| partial_res.full_res())
{
if !res.matches_ns(Namespace::TypeNS) {
debug!(
"lower_generic_arg: Lowering type argument as const argument: {:?}",
Expand Down Expand Up @@ -1206,8 +1199,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
// by `ty_path`.
if qself.is_none()
&& let Some(partial_res) = self.resolver.get_partial_res(t.id)
&& partial_res.unresolved_segments() == 0
&& let Res::Def(DefKind::Trait | DefKind::TraitAlias, _) = partial_res.base_res()
&& let Some(Res::Def(DefKind::Trait | DefKind::TraitAlias, _)) = partial_res.full_res()
{
let (bounds, lifetime_bound) = self.with_dyn_type_scope(true, |this| {
let poly_trait_ref = this.ast_arena.ptr.alloc(PolyTraitRef {
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_ast_lowering/src/pat.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -239,7 +239,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
ident: Ident,
lower_sub: impl FnOnce(&mut Self) -> Option<&'hir hir::Pat<'hir>>,
) -> hir::PatKind<'hir> {
match self.resolver.get_partial_res(p.id).map(|d| d.base_res()) {
match self.resolver.get_partial_res(p.id).map(|d| d.expect_full_res()) {
// `None` can occur in body-less function signatures
res @ (None | Some(Res::Local(_))) => {
let canonical_id = match res {
Expand Down
10 changes: 6 additions & 4 deletions compiler/rustc_ast_lowering/src/path.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -29,11 +29,13 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {

let partial_res =
self.resolver.get_partial_res(id).unwrap_or_else(|| PartialRes::new(Res::Err));
let base_res = partial_res.base_res();
let unresolved_segments = partial_res.unresolved_segments();

let path_span_lo = p.span.shrink_to_lo();
let proj_start = p.segments.len() - partial_res.unresolved_segments();
let proj_start = p.segments.len() - unresolved_segments;
let path = self.arena.alloc(hir::Path {
res: self.lower_res(partial_res.base_res()),
res: self.lower_res(base_res),
segments: self.arena.alloc_from_iter(p.segments[..proj_start].iter().enumerate().map(
|(i, segment)| {
let param_mode = match (qself_position, param_mode) {
Expand All @@ -46,7 +48,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
_ => param_mode,
};

let parenthesized_generic_args = match partial_res.base_res() {
let parenthesized_generic_args = match base_res {
// `a::b::Trait(Args)`
Res::Def(DefKind::Trait, _) if i + 1 == proj_start => {
ParenthesizedGenericArgs::Ok
Expand Down Expand Up @@ -83,7 +85,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {

// Simple case, either no projections, or only fully-qualified.
// E.g., `std::mem::size_of` or `<I as Iterator>::Item`.
if partial_res.unresolved_segments() == 0 {
if unresolved_segments == 0 {
return hir::QPath::Resolved(qself, path);
}

Expand Down
82 changes: 30 additions & 52 deletions compiler/rustc_codegen_ssa/src/back/link.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,9 @@ use super::command::Command;
use super::linker::{self, Linker};
use super::metadata::{create_rmeta_file, MetadataPosition};
use super::rpath::{self, RPathConfig};
use crate::{looks_like_rust_object_file, CodegenResults, CompiledModule, CrateInfo, NativeLib};
use crate::{
errors, looks_like_rust_object_file, CodegenResults, CompiledModule, CrateInfo, NativeLib,
};

use cc::windows_registry;
use regex::Regex;
Expand Down Expand Up @@ -93,7 +95,7 @@ pub fn link_binary<'a>(
let tmpdir = TempFileBuilder::new()
.prefix("rustc")
.tempdir()
.unwrap_or_else(|err| sess.fatal(&format!("couldn't create a temp dir: {}", err)));
.unwrap_or_else(|error| sess.emit_fatal(errors::CreateTempDir { error }));
let path = MaybeTempDir::new(tmpdir, sess.opts.cg.save_temps);
let out_filename = out_filename(
sess,
Expand Down Expand Up @@ -208,7 +210,7 @@ pub fn link_binary<'a>(
pub fn each_linked_rlib(
info: &CrateInfo,
f: &mut dyn FnMut(CrateNum, &Path),
) -> Result<(), String> {
) -> Result<(), errors::LinkRlibError> {
let crates = info.used_crates.iter();
let mut fmts = None;
for (ty, list) in info.dependency_formats.iter() {
Expand All @@ -224,26 +226,23 @@ pub fn each_linked_rlib(
}
}
let Some(fmts) = fmts else {
return Err("could not find formats for rlibs".to_string());
return Err(errors::LinkRlibError::MissingFormat);
};
for &cnum in crates {
match fmts.get(cnum.as_usize() - 1) {
Some(&Linkage::NotLinked | &Linkage::IncludedFromDylib) => continue,
Some(_) => {}
None => return Err("could not find formats for rlibs".to_string()),
None => return Err(errors::LinkRlibError::MissingFormat),
}
let name = info.crate_name[&cnum];
let crate_name = info.crate_name[&cnum];
let used_crate_source = &info.used_crate_source[&cnum];
if let Some((path, _)) = &used_crate_source.rlib {
f(cnum, &path);
} else {
if used_crate_source.rmeta.is_some() {
return Err(format!(
"could not find rlib for: `{}`, found rmeta (metadata) file",
name
));
return Err(errors::LinkRlibError::OnlyRmetaFound { crate_name });
} else {
return Err(format!("could not find rlib for: `{}`", name));
return Err(errors::LinkRlibError::NotFound { crate_name });
}
}
}
Expand Down Expand Up @@ -340,10 +339,7 @@ fn link_rlib<'a>(
// -whole-archive and it isn't clear how we can currently handle such a
// situation correctly.
// See https://github.com/rust-lang/rust/issues/88085#issuecomment-901050897
sess.err(
"the linking modifiers `+bundle` and `+whole-archive` are not compatible \
with each other when generating rlibs",
);
sess.emit_err(errors::IncompatibleLinkingModifiers);
}
NativeLibKind::Static { bundle: None | Some(true), .. } => {}
NativeLibKind::Static { bundle: Some(false), .. }
Expand All @@ -365,12 +361,8 @@ fn link_rlib<'a>(
));
continue;
}
ab.add_archive(&location, Box::new(|_| false)).unwrap_or_else(|e| {
sess.fatal(&format!(
"failed to add native library {}: {}",
location.to_string_lossy(),
e
));
ab.add_archive(&location, Box::new(|_| false)).unwrap_or_else(|error| {
sess.emit_fatal(errors::AddNativeLibrary { library_path: location, error });
});
}
}
Expand All @@ -385,8 +377,8 @@ fn link_rlib<'a>(
tmpdir.as_ref(),
);

ab.add_archive(&output_path, Box::new(|_| false)).unwrap_or_else(|e| {
sess.fatal(&format!("failed to add native library {}: {}", output_path.display(), e));
ab.add_archive(&output_path, Box::new(|_| false)).unwrap_or_else(|error| {
sess.emit_fatal(errors::AddNativeLibrary { library_path: output_path, error });
});
}

Expand Down Expand Up @@ -451,14 +443,11 @@ fn collate_raw_dylibs(
// FIXME: when we add support for ordinals, figure out if we need to do anything
// if we have two DllImport values with the same name but different ordinals.
if import.calling_convention != old_import.calling_convention {
sess.span_err(
import.span,
&format!(
"multiple declarations of external function `{}` from \
library `{}` have different calling conventions",
import.name, name,
),
);
sess.emit_err(errors::MultipleExternalFuncDecl {
span: import.span,
function: import.name,
library_name: &name,
});
}
}
}
Expand Down Expand Up @@ -560,7 +549,7 @@ fn link_staticlib<'a>(
all_native_libs.extend(codegen_results.crate_info.native_libraries[&cnum].iter().cloned());
});
if let Err(e) = res {
sess.fatal(&e);
sess.emit_fatal(e);
}

ab.build(out_filename);
Expand Down Expand Up @@ -673,9 +662,7 @@ fn link_dwarf_object<'a>(
}) {
Ok(()) => {}
Err(e) => {
sess.struct_err("linking dwarf objects with thorin failed")
.note(&format!("{:?}", e))
.emit();
sess.emit_err(errors::ThorinErrorWrapper(e));
sess.abort_if_errors();
}
}
Expand Down Expand Up @@ -879,23 +866,14 @@ fn link_natively<'a>(
let mut output = prog.stderr.clone();
output.extend_from_slice(&prog.stdout);
let escaped_output = escape_string(&output);
let mut err = sess.struct_err(&format!(
"linking with `{}` failed: {}",
linker_path.display(),
prog.status
));
err.note(&format!("{:?}", &cmd)).note(&escaped_output);
if escaped_output.contains("undefined reference to") {
err.help(
"some `extern` functions couldn't be found; some native libraries may \
need to be installed or have their path specified",
);
err.note("use the `-l` flag to specify native libraries to link");
err.note("use the `cargo:rustc-link-lib` directive to specify the native \
libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)");
}
err.emit();

// FIXME: Add UI tests for this error.
let err = errors::LinkingFailed {
linker_path: &linker_path,
exit_status: prog.status,
command: &cmd,
escaped_output: &escaped_output,
};
sess.diagnostic().emit_err(err);
// If MSVC's `link.exe` was expected but the return code
// is not a Microsoft LNK error then suggest a way to fix or
// install the Visual Studio build tools.
Expand Down

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