Auto merge of #114264 - matthiaskrgr:rollup-dfsuu1v, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #98154 (merge functionality of `io::Sink` into `io::Empty`)
 - #102198 (`const`-stablilize `NonNull::as_ref`)
 - #114074 (inline format!() args from rustc_middle up to and including rustc_codegen_llvm (3))
 - #114246 (Weaken unnameable_types lint)
 - #114256 (Fix invalid suggestion for mismatched types in closure arguments)
 - #114258 (Simplify `Span::can_be_used_for_suggestions` a little tiny bit)

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

Author: bors

compiler/rustc_codegen_llvm/src/attributes.rs

@@ -444,7 +444,7 @@ pub fn from_fn_attrs<'ll, 'tcx>(
     let mut function_features = function_features
         .iter()
         .flat_map(|feat| {
-            llvm_util::to_llvm_features(cx.tcx.sess, feat).into_iter().map(|f| format!("+{}", f))
+            llvm_util::to_llvm_features(cx.tcx.sess, feat).into_iter().map(|f| format!("+{f}"))
         })
         .chain(codegen_fn_attrs.instruction_set.iter().map(|x| match x {
             InstructionSetAttr::ArmA32 => "-thumb-mode".to_string(),

compiler/rustc_codegen_llvm/src/back/archive.rs

@@ -56,7 +56,7 @@ fn llvm_machine_type(cpu: &str) -> LLVMMachineType {
         "x86" => LLVMMachineType::I386,
         "aarch64" => LLVMMachineType::ARM64,
         "arm" => LLVMMachineType::ARM,
-        _ => panic!("unsupported cpu type {}", cpu),
+        _ => panic!("unsupported cpu type {cpu}"),
     }
 }
 
@@ -128,7 +128,7 @@ impl ArchiveBuilderBuilder for LlvmArchiveBuilderBuilder {
         let name_suffix = if is_direct_dependency { "_imports" } else { "_imports_indirect" };
         let output_path = {
             let mut output_path: PathBuf = tmpdir.to_path_buf();
-            output_path.push(format!("{}{}", lib_name, name_suffix));
+            output_path.push(format!("{lib_name}{name_suffix}"));
             output_path.with_extension("lib")
         };
 
@@ -156,15 +156,15 @@ impl ArchiveBuilderBuilder for LlvmArchiveBuilderBuilder {
             // functions. Therefore, use binutils to create the import library instead,
             // by writing a .DEF file to the temp dir and calling binutils's dlltool.
             let def_file_path =
-                tmpdir.join(format!("{}{}", lib_name, name_suffix)).with_extension("def");
+                tmpdir.join(format!("{lib_name}{name_suffix}")).with_extension("def");
 
             let def_file_content = format!(
                 "EXPORTS\n{}",
                 import_name_and_ordinal_vector
                     .into_iter()
                     .map(|(name, ordinal)| {
                         match ordinal {
-                            Some(n) => format!("{} @{} NONAME", name, n),
+                            Some(n) => format!("{name} @{n} NONAME"),
                             None => name,
                         }
                     })
@@ -435,7 +435,7 @@ impl<'a> LlvmArchiveBuilder<'a> {
 }
 
 fn string_to_io_error(s: String) -> io::Error {
-    io::Error::new(io::ErrorKind::Other, format!("bad archive: {}", s))
+    io::Error::new(io::ErrorKind::Other, format!("bad archive: {s}"))
 }
 
 fn find_binutils_dlltool(sess: &Session) -> OsString {

compiler/rustc_codegen_llvm/src/back/lto.rs

@@ -332,7 +332,7 @@ fn fat_lto(
             let _timer = cgcx
                 .prof
                 .generic_activity_with_arg_recorder("LLVM_fat_lto_link_module", |recorder| {
-                    recorder.record_arg(format!("{:?}", name))
+                    recorder.record_arg(format!("{name:?}"))
                 });
             info!("linking {:?}", name);
             let data = bc_decoded.data();
@@ -787,7 +787,7 @@ impl ThinLTOKeysMap {
         let file = File::create(path)?;
         let mut writer = io::BufWriter::new(file);
         for (module, key) in &self.keys {
-            writeln!(writer, "{} {}", module, key)?;
+            writeln!(writer, "{module} {key}")?;
         }
         Ok(())
     }
@@ -801,7 +801,7 @@ impl ThinLTOKeysMap {
             let mut split = line.split(' ');
             let module = split.next().unwrap();
             let key = split.next().unwrap();
-            assert_eq!(split.next(), None, "Expected two space-separated values, found {:?}", line);
+            assert_eq!(split.next(), None, "Expected two space-separated values, found {line:?}");
             keys.insert(module.to_string(), key.to_string());
         }
         Ok(Self { keys })

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -259,7 +259,7 @@ pub(crate) fn save_temp_bitcode(
         return;
     }
     unsafe {
-        let ext = format!("{}.bc", name);
+        let ext = format!("{name}.bc");
         let cgu = Some(&module.name[..]);
         let path = cgcx.output_filenames.temp_path_ext(&ext, cgu);
         let cstr = path_to_c_string(&path);
@@ -713,7 +713,7 @@ pub(crate) unsafe fn codegen(
 
                 let Ok(demangled) = rustc_demangle::try_demangle(input) else { return 0 };
 
-                if write!(cursor, "{:#}", demangled).is_err() {
+                if write!(cursor, "{demangled:#}").is_err() {
                     // Possible only if provided buffer is not big enough
                     return 0;
                 }
@@ -834,7 +834,7 @@ pub(crate) unsafe fn codegen(
 }
 
 fn create_section_with_flags_asm(section_name: &str, section_flags: &str, data: &[u8]) -> Vec<u8> {
-    let mut asm = format!(".section {},\"{}\"\n", section_name, section_flags).into_bytes();
+    let mut asm = format!(".section {section_name},\"{section_flags}\"\n").into_bytes();
     asm.extend_from_slice(b".ascii \"");
     asm.reserve(data.len());
     for &byte in data {

compiler/rustc_codegen_llvm/src/builder.rs

@@ -1415,9 +1415,7 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
     ) -> Cow<'b, [&'ll Value]> {
         assert!(
             self.cx.type_kind(fn_ty) == TypeKind::Function,
-            "builder::{} not passed a function, but {:?}",
-            typ,
-            fn_ty
+            "builder::{typ} not passed a function, but {fn_ty:?}"
         );
 
         let param_tys = self.cx.func_params_types(fn_ty);
@@ -1509,12 +1507,9 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
 
         let instr = if signed { "fptosi" } else { "fptoui" };
         let name = if let Some(vector_length) = vector_length {
-            format!(
-                "llvm.{}.sat.v{}i{}.v{}f{}",
-                instr, vector_length, int_width, vector_length, float_width
-            )
+            format!("llvm.{instr}.sat.v{vector_length}i{int_width}.v{vector_length}f{float_width}")
         } else {
-            format!("llvm.{}.sat.i{}.f{}", instr, int_width, float_width)
+            format!("llvm.{instr}.sat.i{int_width}.f{float_width}")
         };
         let f = self.declare_cfn(&name, llvm::UnnamedAddr::No, self.type_func(&[src_ty], dest_ty));
         self.call(self.type_func(&[src_ty], dest_ty), None, None, f, &[val], None)

compiler/rustc_codegen_llvm/src/common.rs

@@ -420,10 +420,10 @@ pub(crate) fn i686_decorated_name(
             DllCallingConvention::C => {}
             DllCallingConvention::Stdcall(arg_list_size)
             | DllCallingConvention::Fastcall(arg_list_size) => {
-                write!(&mut decorated_name, "@{}", arg_list_size).unwrap();
+                write!(&mut decorated_name, "@{arg_list_size}").unwrap();
             }
             DllCallingConvention::Vectorcall(arg_list_size) => {
-                write!(&mut decorated_name, "@@{}", arg_list_size).unwrap();
+                write!(&mut decorated_name, "@@{arg_list_size}").unwrap();
             }
         }
     }

compiler/rustc_codegen_llvm/src/consts.rs

@@ -238,8 +238,7 @@ impl<'ll> CodegenCx<'ll, '_> {
         assert!(
             !defined_in_current_codegen_unit,
             "consts::get_static() should always hit the cache for \
-                 statics defined in the same CGU, but did not for `{:?}`",
-            def_id
+                 statics defined in the same CGU, but did not for `{def_id:?}`"
         );
 
         let ty = instance.ty(self.tcx, ty::ParamEnv::reveal_all());

compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs

@@ -54,7 +54,7 @@ pub fn get_or_insert_gdb_debug_scripts_section_global<'ll>(cx: &CodegenCx<'ll, '
             // The initial byte `4` instructs GDB that the following pretty printer
             // is defined inline as opposed to in a standalone file.
             section_contents.extend_from_slice(b"\x04");
-            let vis_name = format!("pretty-printer-{}-{}\n", crate_name, index);
+            let vis_name = format!("pretty-printer-{crate_name}-{index}\n");
             section_contents.extend_from_slice(vis_name.as_bytes());
             section_contents.extend_from_slice(&visualizer.src);
 

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -184,9 +184,7 @@ fn build_pointer_or_reference_di_node<'ll, 'tcx>(
             debug_assert_eq!(
                 (data_layout.pointer_size, data_layout.pointer_align.abi),
                 cx.size_and_align_of(ptr_type),
-                "ptr_type={}, pointee_type={}",
-                ptr_type,
-                pointee_type,
+                "ptr_type={ptr_type}, pointee_type={pointee_type}",
             );
 
             let di_node = unsafe {
@@ -521,7 +519,7 @@ fn recursion_marker_type_di_node<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>) -> &'ll D
 fn hex_encode(data: &[u8]) -> String {
     let mut hex_string = String::with_capacity(data.len() * 2);
     for byte in data.iter() {
-        write!(&mut hex_string, "{:02x}", byte).unwrap();
+        write!(&mut hex_string, "{byte:02x}").unwrap();
     }
     hex_string
 }
@@ -766,7 +764,7 @@ fn build_param_type_di_node<'ll, 'tcx>(
     t: Ty<'tcx>,
 ) -> DINodeCreationResult<'ll> {
     debug!("build_param_type_di_node: {:?}", t);
-    let name = format!("{:?}", t);
+    let name = format!("{t:?}");
     DINodeCreationResult {
         di_node: unsafe {
             llvm::LLVMRustDIBuilderCreateBasicType(
@@ -814,7 +812,7 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>(
     debug!("build_compile_unit_di_node: {:?}", name_in_debuginfo);
     let rustc_producer = format!("rustc version {}", tcx.sess.cfg_version);
     // FIXME(#41252) Remove "clang LLVM" if we can get GDB and LLVM to play nice.
-    let producer = format!("clang LLVM ({})", rustc_producer);
+    let producer = format!("clang LLVM ({rustc_producer})");
 
     let name_in_debuginfo = name_in_debuginfo.to_string_lossy();
     let work_dir = tcx.sess.opts.working_dir.to_string_lossy(FileNameDisplayPreference::Remapped);
@@ -1331,10 +1329,10 @@ fn build_vtable_type_di_node<'ll, 'tcx>(
                             // Note: This code does not try to give a proper name to each method
                             //       because their might be multiple methods with the same name
                             //       (coming from different traits).
-                            (format!("__method{}", index), void_pointer_type_di_node)
+                            (format!("__method{index}"), void_pointer_type_di_node)
                         }
                         ty::VtblEntry::TraitVPtr(_) => {
-                            (format!("__super_trait_ptr{}", index), void_pointer_type_di_node)
+                            (format!("__super_trait_ptr{index}"), void_pointer_type_di_node)
                         }
                         ty::VtblEntry::MetadataAlign => ("align".to_string(), usize_di_node),
                         ty::VtblEntry::MetadataSize => ("size".to_string(), usize_di_node),
@@ -1504,5 +1502,5 @@ pub fn tuple_field_name(field_index: usize) -> Cow<'static, str> {
     TUPLE_FIELD_NAMES
         .get(field_index)
         .map(|s| Cow::from(*s))
-        .unwrap_or_else(|| Cow::from(format!("__{}", field_index)))
+        .unwrap_or_else(|| Cow::from(format!("__{field_index}")))
 }

compiler/rustc_codegen_llvm/src/debuginfo/utils.rs

@@ -91,8 +91,7 @@ pub(crate) fn fat_pointer_kind<'ll, 'tcx>(
             // For all other pointee types we should already have returned None
             // at the beginning of the function.
             panic!(
-                "fat_pointer_kind() - Encountered unexpected `pointee_tail_ty`: {:?}",
-                pointee_tail_ty
+                "fat_pointer_kind() - Encountered unexpected `pointee_tail_ty`: {pointee_tail_ty:?}"
             )
         }
     }

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -230,36 +230,36 @@ impl<'ll, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'_, 'll, 'tcx> {
                         sym::ctlz | sym::cttz => {
                             let y = self.const_bool(false);
                             self.call_intrinsic(
-                                &format!("llvm.{}.i{}", name, width),
+                                &format!("llvm.{name}.i{width}"),
                                 &[args[0].immediate(), y],
                             )
                         }
                         sym::ctlz_nonzero => {
                             let y = self.const_bool(true);
-                            let llvm_name = &format!("llvm.ctlz.i{}", width);
+                            let llvm_name = &format!("llvm.ctlz.i{width}");
                             self.call_intrinsic(llvm_name, &[args[0].immediate(), y])
                         }
                         sym::cttz_nonzero => {
                             let y = self.const_bool(true);
-                            let llvm_name = &format!("llvm.cttz.i{}", width);
+                            let llvm_name = &format!("llvm.cttz.i{width}");
                             self.call_intrinsic(llvm_name, &[args[0].immediate(), y])
                         }
                         sym::ctpop => self.call_intrinsic(
-                            &format!("llvm.ctpop.i{}", width),
+                            &format!("llvm.ctpop.i{width}"),
                             &[args[0].immediate()],
                         ),
                         sym::bswap => {
                             if width == 8 {
                                 args[0].immediate() // byte swap a u8/i8 is just a no-op
                             } else {
                                 self.call_intrinsic(
-                                    &format!("llvm.bswap.i{}", width),
+                                    &format!("llvm.bswap.i{width}"),
                                     &[args[0].immediate()],
                                 )
                             }
                         }
                         sym::bitreverse => self.call_intrinsic(
-                            &format!("llvm.bitreverse.i{}", width),
+                            &format!("llvm.bitreverse.i{width}"),
                             &[args[0].immediate()],
                         ),
                         sym::rotate_left | sym::rotate_right => {
@@ -1283,7 +1283,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             sym::simd_trunc => ("trunc", bx.type_func(&[vec_ty], vec_ty)),
             _ => return_error!(InvalidMonomorphization::UnrecognizedIntrinsic { span, name }),
         };
-        let llvm_name = &format!("llvm.{0}.v{1}{2}", intr_name, in_len, elem_ty_str);
+        let llvm_name = &format!("llvm.{intr_name}.v{in_len}{elem_ty_str}");
         let f = bx.declare_cfn(llvm_name, llvm::UnnamedAddr::No, fn_ty);
         let c = bx.call(
             fn_ty,
@@ -1498,7 +1498,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let llvm_elem_vec_str = llvm_vector_str(underlying_ty, in_len, pointer_count - 1, bx);
 
         let llvm_intrinsic =
-            format!("llvm.masked.gather.{}.{}", llvm_elem_vec_str, llvm_pointer_vec_str);
+            format!("llvm.masked.gather.{llvm_elem_vec_str}.{llvm_pointer_vec_str}");
         let fn_ty = bx.type_func(
             &[llvm_pointer_vec_ty, alignment_ty, mask_ty, llvm_elem_vec_ty],
             llvm_elem_vec_ty,
@@ -1642,7 +1642,7 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         let llvm_elem_vec_str = llvm_vector_str(underlying_ty, in_len, pointer_count - 1, bx);
 
         let llvm_intrinsic =
-            format!("llvm.masked.scatter.{}.{}", llvm_elem_vec_str, llvm_pointer_vec_str);
+            format!("llvm.masked.scatter.{llvm_elem_vec_str}.{llvm_pointer_vec_str}");
         let fn_ty =
             bx.type_func(&[llvm_elem_vec_ty, llvm_pointer_vec_ty, alignment_ty, mask_ty], ret_t);
         let f = bx.declare_cfn(&llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty);

compiler/rustc_codegen_llvm/src/lib.rs

@@ -298,21 +298,21 @@ impl CodegenBackend for LlvmCodegenBackend {
                     "ropi-rwpi",
                     "default",
                 ] {
-                    writeln!(out, "    {}", name);
+                    writeln!(out, "    {name}");
                 }
                 writeln!(out);
             }
             PrintKind::CodeModels => {
                 writeln!(out, "Available code models:");
                 for name in &["tiny", "small", "kernel", "medium", "large"] {
-                    writeln!(out, "    {}", name);
+                    writeln!(out, "    {name}");
                 }
                 writeln!(out);
             }
             PrintKind::TlsModels => {
                 writeln!(out, "Available TLS models:");
                 for name in &["global-dynamic", "local-dynamic", "initial-exec", "local-exec"] {
-                    writeln!(out, "    {}", name);
+                    writeln!(out, "    {name}");
                 }
                 writeln!(out);
             }

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -315,7 +315,7 @@ pub fn target_features(sess: &Session, allow_unstable: bool) -> Vec<Symbol> {
 
 pub fn print_version() {
     let (major, minor, patch) = get_version();
-    println!("LLVM version: {}.{}.{}", major, minor, patch);
+    println!("LLVM version: {major}.{minor}.{patch}");
 }
 
 pub fn get_version() -> (u32, u32, u32) {
@@ -390,11 +390,11 @@ fn print_target_features(out: &mut dyn PrintBackendInfo, sess: &Session, tm: &ll
 
     writeln!(out, "Features supported by rustc for this target:");
     for (feature, desc) in &rustc_target_features {
-        writeln!(out, "    {1:0$} - {2}.", max_feature_len, feature, desc);
+        writeln!(out, "    {feature:max_feature_len$} - {desc}.");
     }
     writeln!(out, "\nCode-generation features supported by LLVM for this target:");
     for (feature, desc) in &llvm_target_features {
-        writeln!(out, "    {1:0$} - {2}.", max_feature_len, feature, desc);
+        writeln!(out, "    {feature:max_feature_len$} - {desc}.");
     }
     if llvm_target_features.is_empty() {
         writeln!(out, "    Target features listing is not supported by this LLVM version.");
@@ -573,7 +573,7 @@ pub(crate) fn global_llvm_features(sess: &Session, diagnostics: bool) -> Vec<Str
                         match (enable_disable, feat) {
                             ('-' | '+', TargetFeatureFoldStrength::Both(f))
                             | ('+', TargetFeatureFoldStrength::EnableOnly(f)) => {
-                                Some(format!("{}{}", enable_disable, f))
+                                Some(format!("{enable_disable}{f}"))
                             }
                             _ => None,
                         }