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Auto merge of rust-lang#130878 - matthiaskrgr:rollup-npprq87, r=matth…
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Rollup of 6 pull requests

Successful merges:

 - rust-lang#129687 (Implement RFC3137 trim-paths sysroot changes - take 2)
 - rust-lang#130820 (Fix diagnostics for coroutines with () as input.)
 - rust-lang#130833 (Fix the misleading diagnostic for `let_underscore_drop` on type without `Drop` implementation)
 - rust-lang#130845 (Utf8Chunks: add link to Utf8Chunk)
 - rust-lang#130868 (Update FIXME comment in s390x_unknown_linux_*.rs)
 - rust-lang#130873 (rustc_target: Add powerpc64 atomic-related features)

r? `@ghost`
`@rustbot` modify labels: rollup
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bors committed Sep 26, 2024
2 parents 4428a05 + a4a17a3 commit f44615f
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Showing 23 changed files with 215 additions and 107 deletions.
2 changes: 1 addition & 1 deletion compiler/rustc_lint/messages.ftl
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Original file line number Diff line number Diff line change
Expand Up @@ -531,7 +531,7 @@ lint_non_binding_let_multi_suggestion =
consider immediately dropping the value
lint_non_binding_let_on_drop_type =
non-binding let on a type that implements `Drop`
non-binding let on a type that has a destructor
lint_non_binding_let_on_sync_lock = non-binding let on a synchronization lock
.label = this lock is not assigned to a binding and is immediately dropped
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2 changes: 1 addition & 1 deletion compiler/rustc_lint/src/let_underscore.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,7 @@ declare_lint! {
/// intent.
pub LET_UNDERSCORE_DROP,
Allow,
"non-binding let on a type that implements `Drop`"
"non-binding let on a type that has a destructor"
}

declare_lint! {
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105 changes: 56 additions & 49 deletions compiler/rustc_metadata/src/rmeta/decoder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1622,56 +1622,63 @@ impl<'a> CrateMetadataRef<'a> {
);

for virtual_dir in virtual_rust_source_base_dir.iter().flatten() {
if let Some(real_dir) = &sess.opts.real_rust_source_base_dir {
if let rustc_span::FileName::Real(old_name) = name {
if let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } =
old_name
{
if let Ok(rest) = virtual_name.strip_prefix(virtual_dir) {
let virtual_name = virtual_name.clone();

// The std library crates are in
// `$sysroot/lib/rustlib/src/rust/library`, whereas other crates
// may be in `$sysroot/lib/rustlib/src/rust/` directly. So we
// detect crates from the std libs and handle them specially.
const STD_LIBS: &[&str] = &[
"core",
"alloc",
"std",
"test",
"term",
"unwind",
"proc_macro",
"panic_abort",
"panic_unwind",
"profiler_builtins",
"rtstartup",
"rustc-std-workspace-core",
"rustc-std-workspace-alloc",
"rustc-std-workspace-std",
"backtrace",
];
let is_std_lib = STD_LIBS.iter().any(|l| rest.starts_with(l));

let new_path = if is_std_lib {
real_dir.join("library").join(rest)
} else {
real_dir.join(rest)
};

debug!(
"try_to_translate_virtual_to_real: `{}` -> `{}`",
virtual_name.display(),
new_path.display(),
);
let new_name = rustc_span::RealFileName::Remapped {
local_path: Some(new_path),
virtual_name,
};
*old_name = new_name;
}
if let Some(real_dir) = &sess.opts.real_rust_source_base_dir
&& let rustc_span::FileName::Real(old_name) = name
&& let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } =
old_name
&& let Ok(rest) = virtual_name.strip_prefix(virtual_dir)
{
// The std library crates are in
// `$sysroot/lib/rustlib/src/rust/library`, whereas other crates
// may be in `$sysroot/lib/rustlib/src/rust/` directly. So we
// detect crates from the std libs and handle them specially.
const STD_LIBS: &[&str] = &[
"core",
"alloc",
"std",
"test",
"term",
"unwind",
"proc_macro",
"panic_abort",
"panic_unwind",
"profiler_builtins",
"rtstartup",
"rustc-std-workspace-core",
"rustc-std-workspace-alloc",
"rustc-std-workspace-std",
"backtrace",
];
let is_std_lib = STD_LIBS.iter().any(|l| rest.starts_with(l));

let new_path = if is_std_lib {
real_dir.join("library").join(rest)
} else {
real_dir.join(rest)
};

debug!(
"try_to_translate_virtual_to_real: `{}` -> `{}`",
virtual_name.display(),
new_path.display(),
);

// Check if the translated real path is affected by any user-requested
// remaps via --remap-path-prefix. Apply them if so.
// Note that this is a special case for imported rust-src paths specified by
// https://rust-lang.github.io/rfcs/3127-trim-paths.html#handling-sysroot-paths.
// Other imported paths are not currently remapped (see #66251).
let (user_remapped, applied) =
sess.source_map().path_mapping().map_prefix(&new_path);
let new_name = if applied {
rustc_span::RealFileName::Remapped {
local_path: Some(new_path.clone()),
virtual_name: user_remapped.to_path_buf(),
}
}
} else {
rustc_span::RealFileName::LocalPath(new_path)
};
*old_name = new_name;
}
}
};
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5 changes: 2 additions & 3 deletions compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,9 +6,8 @@ pub(crate) fn target() -> Target {
base.endian = Endian::Big;
// z10 is the oldest CPU supported by LLVM
base.cpu = "z10".into();
// FIXME: The ABI implementation in cabi_s390x.rs is for now hard-coded to assume the no-vector
// ABI. Pass the -vector feature string to LLVM to respect this assumption. On LLVM < 16, we
// also strip v128 from the data_layout below to match the older LLVM's expectation.
// FIXME: The ABI implementation in abi/call/s390x.rs is for now hard-coded to assume the no-vector
// ABI. Pass the -vector feature string to LLVM to respect this assumption.
base.features = "-vector".into();
base.max_atomic_width = Some(128);
base.min_global_align = Some(16);
Expand Down
5 changes: 2 additions & 3 deletions compiler/rustc_target/src/spec/targets/s390x_unknown_linux_musl.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -6,9 +6,8 @@ pub(crate) fn target() -> Target {
base.endian = Endian::Big;
// z10 is the oldest CPU supported by LLVM
base.cpu = "z10".into();
// FIXME: The ABI implementation in cabi_s390x.rs is for now hard-coded to assume the no-vector
// ABI. Pass the -vector feature string to LLVM to respect this assumption. On LLVM < 16, we
// also strip v128 from the data_layout below to match the older LLVM's expectation.
// FIXME: The ABI implementation in abi/call/s390x.rs is for now hard-coded to assume the no-vector
// ABI. Pass the -vector feature string to LLVM to respect this assumption.
base.features = "-vector".into();
base.max_atomic_width = Some(128);
base.min_global_align = Some(16);
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2 changes: 2 additions & 0 deletions compiler/rustc_target/src/target_features.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -352,11 +352,13 @@ const HEXAGON_ALLOWED_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
const POWERPC_ALLOWED_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
// tidy-alphabetical-start
("altivec", Unstable(sym::powerpc_target_feature), &[]),
("partword-atomics", Unstable(sym::powerpc_target_feature), &[]),
("power10-vector", Unstable(sym::powerpc_target_feature), &["power9-vector"]),
("power8-altivec", Unstable(sym::powerpc_target_feature), &["altivec"]),
("power8-vector", Unstable(sym::powerpc_target_feature), &["vsx", "power8-altivec"]),
("power9-altivec", Unstable(sym::powerpc_target_feature), &["power8-altivec"]),
("power9-vector", Unstable(sym::powerpc_target_feature), &["power8-vector", "power9-altivec"]),
("quadword-atomics", Unstable(sym::powerpc_target_feature), &[]),
("vsx", Unstable(sym::powerpc_target_feature), &["altivec"]),
// tidy-alphabetical-end
];
Expand Down
72 changes: 35 additions & 37 deletions compiler/rustc_trait_selection/src/error_reporting/traits/fulfillment_errors.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2635,49 +2635,47 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
// This shouldn't be common unless manually implementing one of the
// traits manually, but don't make it more confusing when it does
// happen.
Ok(
if Some(expected_trait_ref.def_id) != self.tcx.lang_items().coroutine_trait()
&& not_tupled
{
self.report_and_explain_type_error(
TypeTrace::trait_refs(
&obligation.cause,
true,
expected_trait_ref,
found_trait_ref,
),
ty::error::TypeError::Mismatch,
)
} else if found.len() == expected.len() {
self.report_closure_arg_mismatch(
span,
found_span,
found_trait_ref,
expected_trait_ref,
obligation.cause.code(),
found_node,
obligation.param_env,
)
} else {
let (closure_span, closure_arg_span, found) = found_did
.and_then(|did| {
let node = self.tcx.hir().get_if_local(did)?;
let (found_span, closure_arg_span, found) =
self.get_fn_like_arguments(node)?;
Some((Some(found_span), closure_arg_span, found))
})
.unwrap_or((found_span, None, found));

self.report_arg_count_mismatch(
if Some(expected_trait_ref.def_id) != self.tcx.lang_items().coroutine_trait() && not_tupled
{
return Ok(self.report_and_explain_type_error(
TypeTrace::trait_refs(&obligation.cause, true, expected_trait_ref, found_trait_ref),
ty::error::TypeError::Mismatch,
));
}
if found.len() != expected.len() {
let (closure_span, closure_arg_span, found) = found_did
.and_then(|did| {
let node = self.tcx.hir().get_if_local(did)?;
let (found_span, closure_arg_span, found) = self.get_fn_like_arguments(node)?;
Some((Some(found_span), closure_arg_span, found))
})
.unwrap_or((found_span, None, found));

// If the coroutine take a single () as its argument,
// the trait argument would found the coroutine take 0 arguments,
// but get_fn_like_arguments would give 1 argument.
// This would result in "Expected to take 1 argument, but it takes 1 argument".
// Check again to avoid this.
if found.len() != expected.len() {
return Ok(self.report_arg_count_mismatch(
span,
closure_span,
expected,
found,
found_trait_ty.is_closure(),
closure_arg_span,
)
},
)
));
}
}
Ok(self.report_closure_arg_mismatch(
span,
found_span,
found_trait_ref,
expected_trait_ref,
obligation.cause.code(),
found_node,
obligation.param_env,
))
}

/// Given some node representing a fn-like thing in the HIR map,
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4 changes: 4 additions & 0 deletions library/core/src/str/lossy.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,8 @@ impl [u8] {
/// Creates an iterator over the contiguous valid UTF-8 ranges of this
/// slice, and the non-UTF-8 fragments in between.
///
/// See the [`Utf8Chunk`] type for documenation of the items yielded by this iterator.
///
/// # Examples
///
/// This function formats arbitrary but mostly-UTF-8 bytes into Rust source
Expand Down Expand Up @@ -148,6 +150,8 @@ impl fmt::Debug for Debug<'_> {
/// If you want a simple conversion from UTF-8 byte slices to string slices,
/// [`from_utf8`] is easier to use.
///
/// See the [`Utf8Chunk`] type for documenation of the items yielded by this iterator.
///
/// [byteslice]: slice
/// [`from_utf8`]: super::from_utf8
///
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10 changes: 10 additions & 0 deletions src/tools/compiletest/src/header.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1115,6 +1115,7 @@ fn expand_variables(mut value: String, config: &Config) -> String {
const CWD: &str = "{{cwd}}";
const SRC_BASE: &str = "{{src-base}}";
const BUILD_BASE: &str = "{{build-base}}";
const RUST_SRC_BASE: &str = "{{rust-src-base}}";
const SYSROOT_BASE: &str = "{{sysroot-base}}";
const TARGET_LINKER: &str = "{{target-linker}}";
const TARGET: &str = "{{target}}";
Expand Down Expand Up @@ -1144,6 +1145,15 @@ fn expand_variables(mut value: String, config: &Config) -> String {
value = value.replace(TARGET, &config.target);
}

if value.contains(RUST_SRC_BASE) {
let src_base = config
.sysroot_base
.join("lib/rustlib/src/rust")
.read_link()
.expect("lib/rustlib/src/rust in target is a symlink to checkout root");
value = value.replace(RUST_SRC_BASE, &src_base.to_string_lossy());
}

value
}

Expand Down
12 changes: 9 additions & 3 deletions src/tools/compiletest/src/runtest.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2294,7 +2294,7 @@ impl<'test> TestCx<'test> {
}

let base_dir = Path::new("/rustc/FAKE_PREFIX");
// Paths into the libstd/libcore
// Fake paths into the libstd/libcore
normalize_path(&base_dir.join("library"), "$SRC_DIR");
// `ui-fulldeps` tests can show paths to the compiler source when testing macros from
// `rustc_macros`
Expand All @@ -2310,8 +2310,14 @@ impl<'test> TestCx<'test> {
// eg. /home/user/rust/build
normalize_path(parent_build_dir, "$BUILD_DIR");

// Paths into lib directory.
normalize_path(&parent_build_dir.parent().unwrap().join("lib"), "$LIB_DIR");
// Real paths into the libstd/libcore
let rust_src_dir = &self
.config
.sysroot_base
.join("lib/rustlib/src/rust")
.read_link()
.expect("lib/rustlib/src/rust in target is a symlink to checkout root");
normalize_path(&rust_src_dir.join("library"), "$SRC_DIR_REAL");

if json {
// escaped newlines in json strings should be readable
Expand Down
2 changes: 1 addition & 1 deletion tests/ui/check-cfg/mix.stderr
View file
Original file line number Diff line number Diff line change
Expand Up @@ -251,7 +251,7 @@ warning: unexpected `cfg` condition value: `zebra`
LL | cfg!(target_feature = "zebra");
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: expected values for `target_feature` are: `10e60`, `2e3`, `3e3r1`, `3e3r2`, `3e3r3`, `3e7`, `7e10`, `a`, `aclass`, `adx`, `aes`, `altivec`, `alu32`, `amx-bf16`, `amx-complex`, `amx-fp16`, `amx-int8`, `amx-tile`, `atomics`, `avx`, `avx2`, `avx512bf16`, `avx512bitalg`, `avx512bw`, `avx512cd`, `avx512dq`, `avx512f`, `avx512fp16`, `avx512ifma`, `avx512vbmi`, `avx512vbmi2`, `avx512vl`, `avx512vnni`, `avx512vp2intersect`, and `avx512vpopcntdq` and 239 more
= note: expected values for `target_feature` are: `10e60`, `2e3`, `3e3r1`, `3e3r2`, `3e3r3`, `3e7`, `7e10`, `a`, `aclass`, `adx`, `aes`, `altivec`, `alu32`, `amx-bf16`, `amx-complex`, `amx-fp16`, `amx-int8`, `amx-tile`, `atomics`, `avx`, `avx2`, `avx512bf16`, `avx512bitalg`, `avx512bw`, `avx512cd`, `avx512dq`, `avx512f`, `avx512fp16`, `avx512ifma`, `avx512vbmi`, `avx512vbmi2`, `avx512vl`, `avx512vnni`, `avx512vp2intersect`, and `avx512vpopcntdq` and 241 more
= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration

warning: 27 warnings emitted
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