Auto merge of #137914 - matthiaskrgr:rollup-phaxe6f, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #137103 ({json|html}docck: catch and error on deprecated syntax)
 - #137632 (rustdoc: when merging target features, keep the highest stability)
 - #137684 (Add rustdoc support for `--emit=dep-info[=path]`)
 - #137794 (make qnx pass a test)
 - #137801 (tests: Unignore target modifier tests on all platforms)
 - #137826 (test(codegen): add looping_over_ne_bytes test for #133528)

r? `@ghost`
`@rustbot` modify labels: rollup

26 files changed, 266 insertions, 151 deletions

diff --git a/compiler/rustc_codegen_ssa/src/target_features.rs b/compiler/rustc_codegen_ssa/src/target_features.rs
index d8b9bdb55da..95a5e96fe46 100644
--- a/compiler/rustc_codegen_ssa/src/target_features.rs
+++ b/compiler/rustc_codegen_ssa/src/target_features.rs
@@ -10,7 +10,7 @@ use rustc_middle::query::Providers;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::parse::feature_err;
 use rustc_span::{Span, Symbol, sym};
-use rustc_target::target_features;
+use rustc_target::target_features::{self, Stability};
 
 use crate::errors;
 
@@ -87,12 +87,17 @@ pub(crate) fn from_target_feature_attr(
                     // But ensure the ABI does not forbid enabling this.
                     // Here we do assume that LLVM doesn't add even more implied features
                     // we don't know about, at least no features that would have ABI effects!
-                    if abi_feature_constraints.incompatible.contains(&name.as_str()) {
-                        tcx.dcx().emit_err(errors::ForbiddenTargetFeatureAttr {
-                            span: item.span(),
-                            feature: name.as_str(),
-                            reason: "this feature is incompatible with the target ABI",
-                        });
+                    // We skip this logic in rustdoc, where we want to allow all target features of
+                    // all targets, so we can't check their ABI compatibility and anyway we are not
+                    // generating code so "it's fine".
+                    if !tcx.sess.opts.actually_rustdoc {
+                        if abi_feature_constraints.incompatible.contains(&name.as_str()) {
+                            tcx.dcx().emit_err(errors::ForbiddenTargetFeatureAttr {
+                                span: item.span(),
+                                feature: name.as_str(),
+                                reason: "this feature is incompatible with the target ABI",
+                            });
+                        }
                     }
                     target_features.push(TargetFeature { name, implied: name != feature_sym })
                 }
@@ -142,11 +147,38 @@ pub(crate) fn provide(providers: &mut Providers) {
         rust_target_features: |tcx, cnum| {
             assert_eq!(cnum, LOCAL_CRATE);
             if tcx.sess.opts.actually_rustdoc {
-                // rustdoc needs to be able to document functions that use all the features, so
-                // whitelist them all
-                rustc_target::target_features::all_rust_features()
-                    .map(|(a, b)| (a.to_string(), b))
-                    .collect()
+                // HACK: rustdoc would like to pretend that we have all the target features, so we
+                // have to merge all the lists into one. To ensure an unstable target never prevents
+                // a stable one from working, we merge the stability info of all instances of the
+                // same target feature name, with the "most stable" taking precedence. And then we
+                // hope that this doesn't cause issues anywhere else in the compiler...
+                let mut result: UnordMap<String, Stability> = Default::default();
+                for (name, stability) in rustc_target::target_features::all_rust_features() {
+                    use std::collections::hash_map::Entry;
+                    match result.entry(name.to_owned()) {
+                        Entry::Vacant(vacant_entry) => {
+                            vacant_entry.insert(stability);
+                        }
+                        Entry::Occupied(mut occupied_entry) => {
+                            // Merge the two stabilities, "more stable" taking precedence.
+                            match (occupied_entry.get(), stability) {
+                                (Stability::Stable, _)
+                                | (
+                                    Stability::Unstable { .. },
+                                    Stability::Unstable { .. } | Stability::Forbidden { .. },
+                                )
+                                | (Stability::Forbidden { .. }, Stability::Forbidden { .. }) => {
+                                    // The stability in the entry is at least as good as the new one, just keep it.
+                                }
+                                _ => {
+                                    // Overwrite stabilite.
+                                    occupied_entry.insert(stability);
+                                }
+                            }
+                        }
+                    }
+                }
+                result
             } else {
                 tcx.sess
                     .target
diff --git a/src/etc/htmldocck.py b/src/etc/htmldocck.py
index d6b594aca71..06fc6518e3b 100755
--- a/src/etc/htmldocck.py
+++ b/src/etc/htmldocck.py
@@ -297,10 +297,24 @@ LINE_PATTERN = re.compile(
     re.X | re.UNICODE,
 )
 
+DEPRECATED_LINE_PATTERN = re.compile(
+    r"""
+    //\s+@
+""",
+    re.X | re.UNICODE,
+)
+
 
 def get_commands(template):
     with io.open(template, encoding="utf-8") as f:
         for lineno, line in concat_multi_lines(f):
+            if DEPRECATED_LINE_PATTERN.search(line):
+                print_err(
+                    lineno,
+                    line,
+                    "Deprecated command syntax, replace `// @` with `//@ `",
+                )
+                continue
             m = LINE_PATTERN.search(line)
             if not m:
                 continue
diff --git a/src/librustdoc/config.rs b/src/librustdoc/config.rs
index fd4d9845c89..e67fe6c88ea 100644
--- a/src/librustdoc/config.rs
+++ b/src/librustdoc/config.rs
@@ -315,23 +315,30 @@ pub(crate) enum ModuleSorting {
     Alphabetical,
 }
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Debug, PartialEq, Eq)]
 pub(crate) enum EmitType {
     Unversioned,
     Toolchain,
     InvocationSpecific,
+    DepInfo(Option<PathBuf>),
 }
 
 impl FromStr for EmitType {
     type Err = ();
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        use EmitType::*;
         match s {
-            "unversioned-shared-resources" => Ok(Unversioned),
-            "toolchain-shared-resources" => Ok(Toolchain),
-            "invocation-specific" => Ok(InvocationSpecific),
-            _ => Err(()),
+            "unversioned-shared-resources" => Ok(Self::Unversioned),
+            "toolchain-shared-resources" => Ok(Self::Toolchain),
+            "invocation-specific" => Ok(Self::InvocationSpecific),
+            "dep-info" => Ok(Self::DepInfo(None)),
+            option => {
+                if let Some(file) = option.strip_prefix("dep-info=") {
+                    Ok(Self::DepInfo(Some(Path::new(file).into())))
+                } else {
+                    Err(())
+                }
+            }
         }
     }
 }
@@ -340,6 +347,15 @@ impl RenderOptions {
     pub(crate) fn should_emit_crate(&self) -> bool {
         self.emit.is_empty() || self.emit.contains(&EmitType::InvocationSpecific)
     }
+
+    pub(crate) fn dep_info(&self) -> Option<Option<&Path>> {
+        for emit in &self.emit {
+            if let EmitType::DepInfo(file) = emit {
+                return Some(file.as_deref());
+            }
+        }
+        None
+    }
 }
 
 /// Create the input (string or file path)
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 757a2a6e0dd..679921c3269 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -15,11 +15,12 @@ use rustc_hir::def::Res;
 use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, LocalDefId};
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::{HirId, Path};
-use rustc_interface::interface;
 use rustc_lint::{MissingDoc, late_lint_mod};
 use rustc_middle::hir::nested_filter;
 use rustc_middle::ty::{self, ParamEnv, Ty, TyCtxt};
-use rustc_session::config::{self, CrateType, ErrorOutputType, Input, ResolveDocLinks};
+use rustc_session::config::{
+    self, CrateType, ErrorOutputType, Input, OutFileName, OutputType, OutputTypes, ResolveDocLinks,
+};
 pub(crate) use rustc_session::config::{Options, UnstableOptions};
 use rustc_session::{Session, lint};
 use rustc_span::source_map;
@@ -219,7 +220,7 @@ pub(crate) fn create_config(
         remap_path_prefix,
         ..
     }: RustdocOptions,
-    RenderOptions { document_private, .. }: &RenderOptions,
+    render_options: &RenderOptions,
 ) -> rustc_interface::Config {
     // Add the doc cfg into the doc build.
     cfgs.push("doc".to_string());
@@ -245,8 +246,11 @@ pub(crate) fn create_config(
 
     let crate_types =
         if proc_macro_crate { vec![CrateType::ProcMacro] } else { vec![CrateType::Rlib] };
-    let resolve_doc_links =
-        if *document_private { ResolveDocLinks::All } else { ResolveDocLinks::Exported };
+    let resolve_doc_links = if render_options.document_private {
+        ResolveDocLinks::All
+    } else {
+        ResolveDocLinks::Exported
+    };
     let test = scrape_examples_options.map(|opts| opts.scrape_tests).unwrap_or(false);
     // plays with error output here!
     let sessopts = config::Options {
@@ -269,10 +273,18 @@ pub(crate) fn create_config(
         crate_name,
         test,
         remap_path_prefix,
+        output_types: if let Some(file) = render_options.dep_info() {
+            OutputTypes::new(&[(
+                OutputType::DepInfo,
+                file.map(|f| OutFileName::Real(f.to_path_buf())),
+            )])
+        } else {
+            OutputTypes::new(&[])
+        },
         ..Options::default()
     };
 
-    interface::Config {
+    rustc_interface::Config {
         opts: sessopts,
         crate_cfg: cfgs,
         crate_check_cfg: check_cfgs,
diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs
index 0185d0c3bb5..b2bbf4614bf 100644
--- a/src/librustdoc/html/render/write_shared.rs
+++ b/src/librustdoc/html/render/write_shared.rs
@@ -153,7 +153,7 @@ fn write_rendered_cross_crate_info(
     include_sources: bool,
 ) -> Result<(), Error> {
     let m = &opt.should_merge;
-    if opt.emit.is_empty() || opt.emit.contains(&EmitType::InvocationSpecific) {
+    if opt.should_emit_crate() {
         if include_sources {
             write_rendered_cci::<SourcesPart, _>(SourcesPart::blank, dst, crates, m)?;
         }
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 1f2f8f7d33a..c1e6d324d5a 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -561,7 +561,7 @@ fn opts() -> Vec<RustcOptGroup> {
             "",
             "emit",
             "Comma separated list of types of output for rustdoc to emit",
-            "[unversioned-shared-resources,toolchain-shared-resources,invocation-specific]",
+            "[unversioned-shared-resources,toolchain-shared-resources,invocation-specific,dep-info]",
         ),
         opt(Unstable, FlagMulti, "", "no-run", "Compile doctests without running them", ""),
         opt(
@@ -890,7 +890,13 @@ fn main_args(early_dcx: &mut EarlyDiagCtxt, at_args: &[String]) {
                 // if we ran coverage, bail early, we don't need to also generate docs at this point
                 // (also we didn't load in any of the useful passes)
                 return;
-            } else if run_check {
+            }
+
+            if render_opts.dep_info().is_some() {
+                rustc_interface::passes::write_dep_info(tcx);
+            }
+
+            if run_check {
                 // Since we're in "check" mode, no need to generate anything beyond this point.
                 return;
             }
diff --git a/src/tools/jsondocck/src/main.rs b/src/tools/jsondocck/src/main.rs
index 7bfa7e3355d..54249fbd9ae 100644
--- a/src/tools/jsondocck/src/main.rs
+++ b/src/tools/jsondocck/src/main.rs
@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 use std::process::ExitCode;
-use std::sync::OnceLock;
+use std::sync::LazyLock;
 use std::{env, fs};
 
 use regex::{Regex, RegexBuilder};
@@ -151,8 +151,7 @@ impl CommandKind {
     }
 }
 
-static LINE_PATTERN: OnceLock<Regex> = OnceLock::new();
-fn line_pattern() -> Regex {
+static LINE_PATTERN: LazyLock<Regex> = LazyLock::new(|| {
     RegexBuilder::new(
         r#"
         //@\s+
@@ -165,7 +164,19 @@ fn line_pattern() -> Regex {
     .unicode(true)
     .build()
     .unwrap()
-}
+});
+
+static DEPRECATED_LINE_PATTERN: LazyLock<Regex> = LazyLock::new(|| {
+    RegexBuilder::new(
+        r#"
+        //\s+@
+    "#,
+    )
+    .ignore_whitespace(true)
+    .unicode(true)
+    .build()
+    .unwrap()
+});
 
 fn print_err(msg: &str, lineno: usize) {
     eprintln!("Invalid command: {} on line {}", msg, lineno)
@@ -184,21 +195,23 @@ fn get_commands(template: &str) -> Result<Vec<Command>, ()> {
     for (lineno, line) in file.split('\n').enumerate() {
         let lineno = lineno + 1;
 
-        let cap = match LINE_PATTERN.get_or_init(line_pattern).captures(line) {
-            Some(c) => c,
-            None => continue,
+        if DEPRECATED_LINE_PATTERN.is_match(line) {
+            print_err("Deprecated command syntax, replace `// @` with `//@ `", lineno);
+            errors = true;
+            continue;
+        }
+
+        let Some(cap) = LINE_PATTERN.captures(line) else {
+            continue;
         };
 
-        let negated = cap.name("negated").unwrap().as_str() == "!";
+        let negated = &cap["negated"] == "!";
 
         let args_str = &cap["args"];
-        let args = match shlex::split(args_str) {
-            Some(args) => args,
-            None => {
-                print_err(&format!("Invalid arguments to shlex::split: `{args_str}`",), lineno);
-                errors = true;
-                continue;
-            }
+        let Some(args) = shlex::split(args_str) else {
+            print_err(&format!("Invalid arguments to shlex::split: `{args_str}`",), lineno);
+            errors = true;
+            continue;
         };
 
         if let Some((kind, path)) = CommandKind::parse(&cap["cmd"], negated, &args) {
diff --git a/src/tools/run-make-support/src/external_deps/rustdoc.rs b/src/tools/run-make-support/src/external_deps/rustdoc.rs
index 3c0e9c82f0b..8a659cd3d8a 100644
--- a/src/tools/run-make-support/src/external_deps/rustdoc.rs
+++ b/src/tools/run-make-support/src/external_deps/rustdoc.rs
@@ -132,4 +132,11 @@ impl Rustdoc {
         self.cmd.arg(format);
         self
     }
+
+    /// Specify type(s) of output files to generate.
+    pub fn emit<S: AsRef<str>>(&mut self, kinds: S) -> &mut Self {
+        let kinds = kinds.as_ref();
+        self.cmd.arg(format!("--emit={kinds}"));
+        self
+    }
 }
diff --git a/tests/codegen/issues/looping-over-ne-bytes-133528.rs b/tests/codegen/issues/looping-over-ne-bytes-133528.rs
new file mode 100644
index 00000000000..35acf765d69
--- /dev/null
+++ b/tests/codegen/issues/looping-over-ne-bytes-133528.rs
@@ -0,0 +1,17 @@
+//@ compile-flags: -Copt-level=3
+//@ min-llvm-version: 20
+#![crate_type = "lib"]
+
+/// Ensure the function is properly optimized
+/// In the issue #133528, the function was not getting optimized
+/// whereas, a version with `bytes` wrapped into a `black_box` was optimized
+/// It was probably a LLVM bug that was fixed in LLVM 20
+
+// CHECK-LABEL: @looping_over_ne_bytes
+// CHECK: icmp eq i64 %input, -1
+// CHECK-NEXT: ret i1
+#[no_mangle]
+fn looping_over_ne_bytes(input: u64) -> bool {
+    let bytes = input.to_ne_bytes();
+    bytes.iter().all(|x| *x == !0)
+}
diff --git a/tests/run-make/rustdoc-default-output/output-default.stdout b/tests/run-make/rustdoc-default-output/output-default.stdout
index c1b246e849c..01f470f6e16 100644
--- a/tests/run-make/rustdoc-default-output/output-default.stdout
+++ b/tests/run-make/rustdoc-default-output/output-default.stdout
@@ -153,7 +153,7 @@ Options:
         --generate-redirect-map 
                         Generate JSON file at the top level instead of
                         generating HTML redirection files
-        --emit [unversioned-shared-resources,toolchain-shared-resources,invocation-specific]
+        --emit [unversioned-shared-resources,toolchain-shared-resources,invocation-specific,dep-info]
                         Comma separated list of types of output for rustdoc to
                         emit
         --no-run        Compile doctests without running them
diff --git a/tests/run-make/rustdoc-dep-info/bar.rs b/tests/run-make/rustdoc-dep-info/bar.rs
new file mode 100644
index 00000000000..76b8dcd05c8
--- /dev/null
+++ b/tests/run-make/rustdoc-dep-info/bar.rs
@@ -0,0 +1 @@
+include!("foo.rs");
diff --git a/tests/run-make/rustdoc-dep-info/doc.md b/tests/run-make/rustdoc-dep-info/doc.md
new file mode 100644
index 00000000000..6a4238fc8b6
--- /dev/null
+++ b/tests/run-make/rustdoc-dep-info/doc.md
@@ -0,0 +1 @@
+blablabla
diff --git a/tests/run-make/rustdoc-dep-info/foo.rs b/tests/run-make/rustdoc-dep-info/foo.rs
new file mode 100644
index 00000000000..b76b4321d62
--- /dev/null
+++ b/tests/run-make/rustdoc-dep-info/foo.rs
@@ -0,0 +1 @@
+pub fn foo() {}
diff --git a/tests/run-make/rustdoc-dep-info/lib.rs b/tests/run-make/rustdoc-dep-info/lib.rs
new file mode 100644
index 00000000000..1f003f79b1f
--- /dev/null
+++ b/tests/run-make/rustdoc-dep-info/lib.rs
@@ -0,0 +1,6 @@
+#![crate_name = "foo"]
+
+#[cfg_attr(doc, doc = include_str!("doc.md"))]
+pub struct Bar;
+
+mod bar;
diff --git a/tests/run-make/rustdoc-dep-info/rmake.rs b/tests/run-make/rustdoc-dep-info/rmake.rs
new file mode 100644
index 00000000000..6902bfc21ca
--- /dev/null
+++ b/tests/run-make/rustdoc-dep-info/rmake.rs
@@ -0,0 +1,21 @@
+// This is a simple smoke test for rustdoc's `--emit dep-info` feature. It prints out
+// information about dependencies in a Makefile-compatible format, as a `.d` file.
+
+use run_make_support::assertion_helpers::assert_contains;
+use run_make_support::{path, rfs, rustdoc};
+
+fn main() {
+    // We're only emitting dep info, so we shouldn't be running static analysis to
+    // figure out that this program is erroneous.
+    rustdoc().input("lib.rs").arg("-Zunstable-options").emit("dep-info").run();
+
+    let content = rfs::read_to_string("foo.d");
+    assert_contains(&content, "lib.rs:");
+    assert_contains(&content, "foo.rs:");
+    assert_contains(&content, "bar.rs:");
+    assert_contains(&content, "doc.md:");
+
+    // Now we check that we can provide a file name to the `dep-info` argument.
+    rustdoc().input("lib.rs").arg("-Zunstable-options").emit("dep-info=bla.d").run();
+    assert!(path("bla.d").exists());
+}
diff --git a/tests/rustdoc-ui/target-feature-stability.rs b/tests/rustdoc-ui/target-feature-stability.rs
new file mode 100644
index 00000000000..17fa3ccfe3e
--- /dev/null
+++ b/tests/rustdoc-ui/target-feature-stability.rs
@@ -0,0 +1,28 @@
+//! This is a regression test for <https://github.com/rust-lang/rust/issues/137366>, ensuring
+//! that we can use the `neon` target feature on ARM32 targets in rustdoc despite there
+//! being a "forbidden" feature of the same name for aarch64, and rustdoc merging the
+//! target features of all targets.
+//@ check-pass
+//@ revisions: arm aarch64
+//@[arm] compile-flags: --target armv7-unknown-linux-gnueabihf
+//@[arm] needs-llvm-components: arm
+//@[aarch64] compile-flags: --target aarch64-unknown-none-softfloat
+//@[aarch64] needs-llvm-components: aarch64
+
+#![crate_type = "lib"]
+#![feature(no_core, lang_items)]
+#![feature(arm_target_feature)]
+#![no_core]
+
+#[lang = "sized"]
+pub trait Sized {}
+
+// `fp-armv8` is "forbidden" on aarch64 as we tie it to `neon`.
+#[target_feature(enable = "fp-armv8")]
+pub fn fun1() {}
+
+// This would usually be rejected as it changes the ABI.
+// But we disable that check in rustdoc since we are building "for all targets" and the
+// check can't really handle that.
+#[target_feature(enable = "soft-float")]
+pub fn fun2() {}
diff --git a/tests/ui/attributes/auxiliary/used_pre_main_constructor.rs b/tests/ui/attributes/auxiliary/used_pre_main_constructor.rs
index 686dcb277f8..d94572ef5d6 100644
--- a/tests/ui/attributes/auxiliary/used_pre_main_constructor.rs
+++ b/tests/ui/attributes/auxiliary/used_pre_main_constructor.rs
@@ -10,14 +10,15 @@
 
 #[cfg_attr(
     any(
-        target_os = "linux",
         target_os = "android",
+        target_os = "dragonfly",
         target_os = "freebsd",
+        target_os = "haiku",
+        target_os = "illumos",
+        target_os = "linux",
         target_os = "netbsd",
+        target_os = "nto",
         target_os = "openbsd",
-        target_os = "dragonfly",
-        target_os = "illumos",
-        target_os = "haiku"
     ),
     link_section = ".init_array"
 )]
diff --git a/tests/ui/target_modifiers/auxiliary/default_reg_struct_return.rs b/tests/ui/target_modifiers/auxiliary/default_reg_struct_return.rs
index 355e7c56e94..2bbdc839211 100644
--- a/tests/ui/target_modifiers/auxiliary/default_reg_struct_return.rs
+++ b/tests/ui/target_modifiers/auxiliary/default_reg_struct_return.rs
@@ -1,20 +1,7 @@
-//@ compile-flags: --target i686-unknown-linux-gnu -Cpanic=abort
-// Auxiliary build problems with aarch64-apple:
-// Shared library linking cc seems to convert "-m32" flag into -arch armv4t
-// Auxiliary build problems with i686-mingw: linker `cc` not found
-//@ only-x86
-//@ ignore-windows
-//@ ignore-apple
+//@ no-prefer-dynamic
+//@ compile-flags: --target i686-unknown-linux-gnu
 //@ needs-llvm-components: x86
+
+#![feature(no_core)]
 #![crate_type = "rlib"]
 #![no_core]
-#![feature(no_core, lang_items, repr_simd)]
-
-#[lang = "sized"]
-trait Sized {}
-#[lang = "copy"]
-trait Copy {}
-
-pub fn somefun() {}
-
-pub struct S;
diff --git a/tests/ui/target_modifiers/auxiliary/wrong_regparm.rs b/tests/ui/target_modifiers/auxiliary/wrong_regparm.rs
index 2e16f1ee747..267292faecd 100644
--- a/tests/ui/target_modifiers/auxiliary/wrong_regparm.rs
+++ b/tests/ui/target_modifiers/auxiliary/wrong_regparm.rs
@@ -1,20 +1,7 @@
-//@ compile-flags: --target i686-unknown-linux-gnu -Zregparm=2 -Cpanic=abort
-// Auxiliary build problems with aarch64-apple:
-// Shared library linking cc seems to convert "-m32" flag into -arch armv4t
-// Auxiliary build problems with i686-mingw: linker `cc` not found
-//@ only-x86
-//@ ignore-windows
-//@ ignore-apple
+//@ no-prefer-dynamic
+//@ compile-flags: --target i686-unknown-linux-gnu -Zregparm=2
 //@ needs-llvm-components: x86
+
+#![feature(no_core)]
 #![crate_type = "rlib"]
 #![no_core]
-#![feature(no_core, lang_items, repr_simd)]
-
-#[lang = "sized"]
-trait Sized {}
-#[lang = "copy"]
-trait Copy {}
-
-pub fn somefun() {}
-
-pub struct S;
diff --git a/tests/ui/target_modifiers/auxiliary/wrong_regparm_and_ret.rs b/tests/ui/target_modifiers/auxiliary/wrong_regparm_and_ret.rs
index 39c6be9d589..82ee3e71d16 100644
--- a/tests/ui/target_modifiers/auxiliary/wrong_regparm_and_ret.rs
+++ b/tests/ui/target_modifiers/auxiliary/wrong_regparm_and_ret.rs
@@ -1,20 +1,7 @@
-//@ compile-flags: --target i686-unknown-linux-gnu -Zregparm=2 -Zreg-struct-return=true -Cpanic=abort
-// Auxiliary build problems with aarch64-apple:
-// Shared library linking cc seems to convert "-m32" flag into -arch armv4t
-// Auxiliary build problems with i686-mingw: linker `cc` not found
-//@ only-x86
-//@ ignore-windows
-//@ ignore-apple
+//@ no-prefer-dynamic
+//@ compile-flags: --target i686-unknown-linux-gnu -Zregparm=2 -Zreg-struct-return=true
 //@ needs-llvm-components: x86
+
+#![feature(no_core)]
 #![crate_type = "rlib"]
 #![no_core]
-#![feature(no_core, lang_items, repr_simd)]
-
-#[lang = "sized"]
-trait Sized {}
-#[lang = "copy"]
-trait Copy {}
-
-pub fn somefun() {}
-
-pub struct S;
diff --git a/tests/ui/target_modifiers/defaults_check.error.stderr b/tests/ui/target_modifiers/defaults_check.error.stderr
index c545dd71069..4833fe90677 100644
--- a/tests/ui/target_modifiers/defaults_check.error.stderr
+++ b/tests/ui/target_modifiers/defaults_check.error.stderr
@@ -1,7 +1,7 @@
 error: mixing `-Zreg-struct-return` will cause an ABI mismatch in crate `defaults_check`
-  --> $DIR/defaults_check.rs:20:1
+  --> $DIR/defaults_check.rs:15:1
    |
-LL | #![crate_type = "rlib"]
+LL | #![feature(no_core)]
    | ^
    |
    = help: the `-Zreg-struct-return` flag modifies the ABI so Rust crates compiled with different values of this flag cannot be used together safely
diff --git a/tests/ui/target_modifiers/defaults_check.rs b/tests/ui/target_modifiers/defaults_check.rs
index b8f4848d3a4..de72acd32bc 100644
--- a/tests/ui/target_modifiers/defaults_check.rs
+++ b/tests/ui/target_modifiers/defaults_check.rs
@@ -1,27 +1,20 @@
 // Tests that default unspecified target modifier value in dependency crate is ok linked
 // with the same value, explicitly specified
-//@ aux-crate:default_reg_struct_return=default_reg_struct_return.rs
+
+//@ aux-build:default_reg_struct_return.rs
 //@ compile-flags: --target i686-unknown-linux-gnu -Cpanic=abort
-//@ revisions:error ok ok_explicit
+//@ needs-llvm-components: x86
+
+//@ revisions: ok ok_explicit error
 //@[ok] compile-flags:
 //@[ok_explicit] compile-flags: -Zreg-struct-return=false
 //@[error] compile-flags: -Zreg-struct-return=true
+//@[ok] check-pass
+//@[ok_explicit] check-pass
 
-// Auxiliary build problems with aarch64-apple:
-// Shared library linking cc seems to convert "-m32" flag into -arch armv4t
-// Auxiliary build problems with i686-mingw: linker `cc` not found
-//@ only-x86
-//@ ignore-windows
-//@ ignore-apple
-//@ needs-llvm-components: x86
-//@[ok] build-pass
-//@[ok_explicit] build-pass
-
-#![crate_type = "rlib"]
+#![feature(no_core)]
 //[error]~^ ERROR mixing `-Zreg-struct-return` will cause an ABI mismatch in crate `defaults_check`
+#![crate_type = "rlib"]
 #![no_core]
-#![feature(no_core, lang_items, repr_simd)]
 
-fn foo() {
-    default_reg_struct_return::somefun();
-}
+extern crate default_reg_struct_return;
diff --git a/tests/ui/target_modifiers/incompatible_regparm.error_generated.stderr b/tests/ui/target_modifiers/incompatible_regparm.error_generated.stderr
index 692fc7a4e3f..81015694d05 100644
--- a/tests/ui/target_modifiers/incompatible_regparm.error_generated.stderr
+++ b/tests/ui/target_modifiers/incompatible_regparm.error_generated.stderr
@@ -1,7 +1,7 @@
 error: mixing `-Zregparm` will cause an ABI mismatch in crate `incompatible_regparm`
-  --> $DIR/incompatible_regparm.rs:16:1
+  --> $DIR/incompatible_regparm.rs:11:1
    |
-LL | #![crate_type = "rlib"]
+LL | #![feature(no_core)]
    | ^
    |
    = help: the `-Zregparm` flag modifies the ABI so Rust crates compiled with different values of this flag cannot be used together safely
diff --git a/tests/ui/target_modifiers/incompatible_regparm.rs b/tests/ui/target_modifiers/incompatible_regparm.rs
index e866c5aa891..befe573b276 100644
--- a/tests/ui/target_modifiers/incompatible_regparm.rs
+++ b/tests/ui/target_modifiers/incompatible_regparm.rs
@@ -1,23 +1,16 @@
-//@ aux-crate:wrong_regparm=wrong_regparm.rs
-//@ compile-flags: --target i686-unknown-linux-gnu -Zregparm=1 -Cpanic=abort
-// Auxiliary build problems with aarch64-apple:
-// Shared library linking cc seems to convert "-m32" flag into -arch armv4t
-// Auxiliary build problems with i686-mingw: linker `cc` not found
-//@ only-x86
-//@ ignore-windows
-//@ ignore-apple
+//@ aux-build:wrong_regparm.rs
+//@ compile-flags: --target i686-unknown-linux-gnu -Zregparm=1
 //@ needs-llvm-components: x86
-//@ revisions:error_generated allow_regparm_mismatch allow_no_value
 
+//@ revisions:allow_regparm_mismatch allow_no_value error_generated
 //@[allow_regparm_mismatch] compile-flags: -Cunsafe-allow-abi-mismatch=regparm
-//@[allow_regparm_mismatch] build-pass
 //@[allow_no_value] compile-flags: -Cunsafe-allow-abi-mismatch
+//@[error_generated] compile-flags:
+//@[allow_regparm_mismatch] check-pass
 
-#![crate_type = "rlib"]
+#![feature(no_core)]
 //[error_generated]~^ ERROR mixing `-Zregparm` will cause an ABI mismatch in crate `incompatible_regparm`
+#![crate_type = "rlib"]
 #![no_core]
-#![feature(no_core, lang_items, repr_simd)]
 
-fn foo() {
-    wrong_regparm::somefun();
-}
+extern crate wrong_regparm;
diff --git a/tests/ui/target_modifiers/two_flags.rs b/tests/ui/target_modifiers/two_flags.rs
index ca17117a267..d5b5a923ca0 100644
--- a/tests/ui/target_modifiers/two_flags.rs
+++ b/tests/ui/target_modifiers/two_flags.rs
@@ -1,23 +1,15 @@
-//@ aux-crate:wrong_regparm_and_ret=wrong_regparm_and_ret.rs
-//@ compile-flags: --target i686-unknown-linux-gnu -Cpanic=abort
-// Auxiliary build problems with aarch64-apple:
-// Shared library linking cc seems to convert "-m32" flag into -arch armv4t
-// Auxiliary build problems with i686-mingw: linker `cc` not found
-//@ only-x86
-//@ ignore-windows
-//@ ignore-apple
+//@ aux-build:wrong_regparm_and_ret.rs
+//@ compile-flags: --target i686-unknown-linux-gnu
 //@ needs-llvm-components: x86
-//@ revisions:two_allowed unknown_allowed
 
+//@ revisions:two_allowed unknown_allowed
 //@[two_allowed] compile-flags: -Cunsafe-allow-abi-mismatch=regparm,reg-struct-return
-//@[two_allowed] build-pass
 //@[unknown_allowed] compile-flags: -Cunsafe-allow-abi-mismatch=unknown_flag -Zregparm=2 -Zreg-struct-return=true
+//@[two_allowed] check-pass
 
-#![crate_type = "rlib"]
+#![feature(no_core)]
 //[unknown_allowed]~^ ERROR unknown target modifier `unknown_flag`, requested by `-Cunsafe-allow-abi-mismatch=unknown_flag`
+#![crate_type = "rlib"]
 #![no_core]
-#![feature(no_core, lang_items, repr_simd)]
 
-fn foo() {
-    wrong_regparm_and_ret::somefun();
-}
+extern crate wrong_regparm_and_ret;
diff --git a/tests/ui/target_modifiers/two_flags.unknown_allowed.stderr b/tests/ui/target_modifiers/two_flags.unknown_allowed.stderr
index c8040c6e389..248bde452f2 100644
--- a/tests/ui/target_modifiers/two_flags.unknown_allowed.stderr
+++ b/tests/ui/target_modifiers/two_flags.unknown_allowed.stderr
@@ -1,7 +1,7 @@
 error: unknown target modifier `unknown_flag`, requested by `-Cunsafe-allow-abi-mismatch=unknown_flag`
-  --> $DIR/two_flags.rs:16:1
+  --> $DIR/two_flags.rs:10:1
    |
-LL | #![crate_type = "rlib"]
+LL | #![feature(no_core)]
    | ^
 
 error: aborting due to 1 previous error