Auto merge of rust-lang#138155 - matthiaskrgr:rollup-xq5buio, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - rust-lang#137674 (Enable `f16` for LoongArch)
 - rust-lang#138034 (library: Use `size_of` from the prelude instead of imported)
 - rust-lang#138060 (Revert rust-lang#138019 after further discussion about how hir-pretty printing should work)
 - rust-lang#138073 (Break critical edges in inline asm before code generation)
 - rust-lang#138107 (`librustdoc`: clippy fixes)
 - rust-lang#138111 (Use `default_field_values` for `rustc_errors::Context`, `rustc_session::config::NextSolverConfig` and `rustc_session::config::ErrorOutputType`)

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

Author: bors

Diff for: compiler/rustc_errors/src/lib.rs

@@ -14,6 +14,7 @@
 #![feature(associated_type_defaults)]
 #![feature(box_into_inner)]
 #![feature(box_patterns)]
+#![feature(default_field_values)]
 #![feature(error_reporter)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]

Diff for: compiler/rustc_errors/src/markdown/parse.rs

@@ -40,11 +40,13 @@ type ParseResult<'a> = Option<Parsed<'a>>;
 
 /// Parsing context
 #[derive(Clone, Copy, Debug, PartialEq)]
+// The default values are the most common setting for non top-level parsing: not top block, not at
+// line start (yes leading whitespace, not escaped).
 struct Context {
     /// If true, we are at a the topmost level (not recursing a nested tt)
-    top_block: bool,
+    top_block: bool = false,
     /// Previous character
-    prev: Prev,
+    prev: Prev = Prev::Whitespace,
 }
 
 /// Character class preceding this one
@@ -57,14 +59,6 @@ enum Prev {
     Any,
 }
 
-impl Default for Context {
-    /// Most common setting for non top-level parsing: not top block, not at
-    /// line start (yes leading whitespace, not escaped)
-    fn default() -> Self {
-        Self { top_block: false, prev: Prev::Whitespace }
-    }
-}
-
 /// Flags to simple parser function
 #[derive(Clone, Copy, Debug, PartialEq)]
 enum ParseOpt {
@@ -248,7 +242,7 @@ fn parse_heading(buf: &[u8]) -> ParseResult<'_> {
     }
 
     let (txt, rest) = parse_to_newline(&buf[1..]);
-    let ctx = Context { top_block: false, prev: Prev::Whitespace };
+    let ctx = Context { .. };
     let stream = parse_recursive(txt, ctx);
 
     Some((MdTree::Heading(level.try_into().unwrap(), stream), rest))
@@ -257,7 +251,7 @@ fn parse_heading(buf: &[u8]) -> ParseResult<'_> {
 /// Bulleted list
 fn parse_unordered_li(buf: &[u8]) -> Parsed<'_> {
     let (txt, rest) = get_indented_section(&buf[2..]);
-    let ctx = Context { top_block: false, prev: Prev::Whitespace };
+    let ctx = Context { .. };
     let stream = parse_recursive(trim_ascii_start(txt), ctx);
     (MdTree::UnorderedListItem(stream), rest)
 }
@@ -266,7 +260,7 @@ fn parse_unordered_li(buf: &[u8]) -> Parsed<'_> {
 fn parse_ordered_li(buf: &[u8]) -> Parsed<'_> {
     let (num, pos) = ord_list_start(buf).unwrap(); // success tested in caller
     let (txt, rest) = get_indented_section(&buf[pos..]);
-    let ctx = Context { top_block: false, prev: Prev::Whitespace };
+    let ctx = Context { .. };
     let stream = parse_recursive(trim_ascii_start(txt), ctx);
     (MdTree::OrderedListItem(num, stream), rest)
 }

Diff for: compiler/rustc_hir_pretty/src/lib.rs

@@ -117,80 +117,6 @@ impl<'a> State<'a> {
                 ));
                 self.hardbreak()
             }
-            hir::Attribute::Parsed(AttributeKind::Deprecation { deprecation, .. }) => {
-                self.word("#[deprecated");
-
-                // There are three possible forms here:
-                // 1. a form with explicit components like
-                //    `#[deprecated(since = "1.2.3", note = "some note", suggestion = "something")]`
-                //    where each component may be present or absent.
-                // 2. `#[deprecated = "message"]`
-                // 3. `#[deprecated]`
-                //
-                // Let's figure out which we need.
-                // If there's a `since` or `suggestion` value, we're definitely in form 1.
-                if matches!(
-                    deprecation.since,
-                    rustc_attr_parsing::DeprecatedSince::RustcVersion(..)
-                        | rustc_attr_parsing::DeprecatedSince::Future
-                        | rustc_attr_parsing::DeprecatedSince::NonStandard(..)
-                ) || deprecation.suggestion.is_some()
-                {
-                    self.word("(");
-                    let mut use_comma = false;
-
-                    match &deprecation.since {
-                        rustc_attr_parsing::DeprecatedSince::RustcVersion(rustc_version) => {
-                            self.word("since = \"");
-                            self.word(format!(
-                                "{}.{}.{}",
-                                rustc_version.major, rustc_version.minor, rustc_version.patch
-                            ));
-                            self.word("\"");
-                            use_comma = true;
-                        }
-                        rustc_attr_parsing::DeprecatedSince::Future => {
-                            self.word("since = \"future\"");
-                            use_comma = true;
-                        }
-                        rustc_attr_parsing::DeprecatedSince::NonStandard(symbol) => {
-                            self.word("since = \"");
-                            self.word(symbol.to_ident_string());
-                            self.word("\"");
-                            use_comma = true;
-                        }
-                        _ => {}
-                    }
-
-                    if let Some(note) = &deprecation.note {
-                        if use_comma {
-                            self.word(", ");
-                        }
-                        self.word("note = \"");
-                        self.word(note.to_ident_string());
-                        self.word("\"");
-                        use_comma = true;
-                    }
-
-                    if let Some(suggestion) = &deprecation.suggestion {
-                        if use_comma {
-                            self.word(", ");
-                        }
-                        self.word("suggestion = \"");
-                        self.word(suggestion.to_ident_string());
-                        self.word("\"");
-                    }
-                } else if let Some(note) = &deprecation.note {
-                    // We're in form 2: `#[deprecated = "message"]`.
-                    self.word(" = \"");
-                    self.word(note.to_ident_string());
-                    self.word("\"");
-                } else {
-                    // We're in form 3: `#[deprecated]`. Nothing to do here.
-                }
-
-                self.word("]");
-            }
             hir::Attribute::Parsed(pa) => {
                 self.word("#[attr=\"");
                 pa.print_attribute(self);

Diff for: compiler/rustc_mir_transform/src/add_call_guards.rs

@@ -40,32 +40,51 @@ impl<'tcx> crate::MirPass<'tcx> for AddCallGuards {
         let mut new_blocks = Vec::new();
 
         let cur_len = body.basic_blocks.len();
+        let mut new_block = |source_info: SourceInfo, is_cleanup: bool, target: BasicBlock| {
+            let block = BasicBlockData {
+                statements: vec![],
+                is_cleanup,
+                terminator: Some(Terminator { source_info, kind: TerminatorKind::Goto { target } }),
+            };
+            let idx = cur_len + new_blocks.len();
+            new_blocks.push(block);
+            BasicBlock::new(idx)
+        };
 
         for block in body.basic_blocks_mut() {
             match block.terminator {
                 Some(Terminator {
                     kind: TerminatorKind::Call { target: Some(ref mut destination), unwind, .. },
                     source_info,
                 }) if pred_count[*destination] > 1
-                    && (matches!(
-                        unwind,
-                        UnwindAction::Cleanup(_) | UnwindAction::Terminate(_)
-                    ) || self == &AllCallEdges) =>
+                    && (generates_invoke(unwind) || self == &AllCallEdges) =>
                 {
                     // It's a critical edge, break it
-                    let call_guard = BasicBlockData {
-                        statements: vec![],
-                        is_cleanup: block.is_cleanup,
-                        terminator: Some(Terminator {
-                            source_info,
-                            kind: TerminatorKind::Goto { target: *destination },
-                        }),
-                    };
-
-                    // Get the index it will be when inserted into the MIR
-                    let idx = cur_len + new_blocks.len();
-                    new_blocks.push(call_guard);
-                    *destination = BasicBlock::new(idx);
+                    *destination = new_block(source_info, block.is_cleanup, *destination);
+                }
+                Some(Terminator {
+                    kind:
+                        TerminatorKind::InlineAsm {
+                            asm_macro: InlineAsmMacro::Asm,
+                            ref mut targets,
+                            ref operands,
+                            unwind,
+                            ..
+                        },
+                    source_info,
+                }) if self == &CriticalCallEdges => {
+                    let has_outputs = operands.iter().any(|op| {
+                        matches!(op, InlineAsmOperand::InOut { .. } | InlineAsmOperand::Out { .. })
+                    });
+                    let has_labels =
+                        operands.iter().any(|op| matches!(op, InlineAsmOperand::Label { .. }));
+                    if has_outputs && (has_labels || generates_invoke(unwind)) {
+                        for target in targets.iter_mut() {
+                            if pred_count[*target] > 1 {
+                                *target = new_block(source_info, block.is_cleanup, *target);
+                            }
+                        }
+                    }
                 }
                 _ => {}
             }
@@ -80,3 +99,11 @@ impl<'tcx> crate::MirPass<'tcx> for AddCallGuards {
         true
     }
 }
+
+/// Returns true if this unwind action is code generated as an invoke as opposed to a call.
+fn generates_invoke(unwind: UnwindAction) -> bool {
+    match unwind {
+        UnwindAction::Continue | UnwindAction::Unreachable => false,
+        UnwindAction::Cleanup(_) | UnwindAction::Terminate(_) => true,
+    }
+}

Diff for: compiler/rustc_session/src/config.rs

@@ -681,10 +681,14 @@ impl OutputType {
 }
 
 /// The type of diagnostics output to generate.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Default)]
 pub enum ErrorOutputType {
     /// Output meant for the consumption of humans.
-    HumanReadable(HumanReadableErrorType, ColorConfig),
+    #[default]
+    HumanReadable {
+        kind: HumanReadableErrorType = HumanReadableErrorType::Default,
+        color_config: ColorConfig = ColorConfig::Auto,
+    },
     /// Output that's consumed by other tools such as `rustfix` or the `RLS`.
     Json {
         /// Render the JSON in a human readable way (with indents and newlines).
@@ -696,12 +700,6 @@ pub enum ErrorOutputType {
     },
 }
 
-impl Default for ErrorOutputType {
-    fn default() -> Self {
-        Self::HumanReadable(HumanReadableErrorType::Default, ColorConfig::Auto)
-    }
-}
-
 #[derive(Clone, Hash, Debug)]
 pub enum ResolveDocLinks {
     /// Do not resolve doc links.
@@ -898,18 +896,13 @@ pub enum PrintKind {
     DeploymentTarget,
 }
 
-#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, Default)]
 pub struct NextSolverConfig {
     /// Whether the new trait solver should be enabled in coherence.
-    pub coherence: bool,
+    pub coherence: bool = true,
     /// Whether the new trait solver should be enabled everywhere.
     /// This is only `true` if `coherence` is also enabled.
-    pub globally: bool,
-}
-impl Default for NextSolverConfig {
-    fn default() -> Self {
-        NextSolverConfig { coherence: true, globally: false }
-    }
+    pub globally: bool = false,
 }
 
 #[derive(Clone)]
@@ -1825,7 +1818,7 @@ pub fn parse_json(early_dcx: &EarlyDiagCtxt, matches: &getopts::Matches) -> Json
 pub fn parse_error_format(
     early_dcx: &mut EarlyDiagCtxt,
     matches: &getopts::Matches,
-    color: ColorConfig,
+    color_config: ColorConfig,
     json_color: ColorConfig,
     json_rendered: HumanReadableErrorType,
 ) -> ErrorOutputType {
@@ -1835,35 +1828,34 @@ pub fn parse_error_format(
     // `opt_present` because the latter will panic.
     let error_format = if matches.opts_present(&["error-format".to_owned()]) {
         match matches.opt_str("error-format").as_deref() {
-            None | Some("human") => {
-                ErrorOutputType::HumanReadable(HumanReadableErrorType::Default, color)
-            }
-            Some("human-annotate-rs") => {
-                ErrorOutputType::HumanReadable(HumanReadableErrorType::AnnotateSnippet, color)
-            }
+            None | Some("human") => ErrorOutputType::HumanReadable { color_config, .. },
+            Some("human-annotate-rs") => ErrorOutputType::HumanReadable {
+                kind: HumanReadableErrorType::AnnotateSnippet,
+                color_config,
+            },
             Some("json") => {
                 ErrorOutputType::Json { pretty: false, json_rendered, color_config: json_color }
             }
             Some("pretty-json") => {
                 ErrorOutputType::Json { pretty: true, json_rendered, color_config: json_color }
             }
-            Some("short") => ErrorOutputType::HumanReadable(HumanReadableErrorType::Short, color),
-            Some("human-unicode") => {
-                ErrorOutputType::HumanReadable(HumanReadableErrorType::Unicode, color)
+            Some("short") => {
+                ErrorOutputType::HumanReadable { kind: HumanReadableErrorType::Short, color_config }
             }
+            Some("human-unicode") => ErrorOutputType::HumanReadable {
+                kind: HumanReadableErrorType::Unicode,
+                color_config,
+            },
             Some(arg) => {
-                early_dcx.set_error_format(ErrorOutputType::HumanReadable(
-                    HumanReadableErrorType::Default,
-                    color,
-                ));
+                early_dcx.set_error_format(ErrorOutputType::HumanReadable { color_config, .. });
                 early_dcx.early_fatal(format!(
                     "argument for `--error-format` must be `human`, `human-annotate-rs`, \
                     `human-unicode`, `json`, `pretty-json` or `short` (instead was `{arg}`)"
                 ))
             }
         }
     } else {
-        ErrorOutputType::HumanReadable(HumanReadableErrorType::Default, color)
+        ErrorOutputType::HumanReadable { color_config, .. }
     };
 
     match error_format {
@@ -1918,7 +1910,7 @@ fn check_error_format_stability(
     }
     let format = match format {
         ErrorOutputType::Json { pretty: true, .. } => "pretty-json",
-        ErrorOutputType::HumanReadable(format, _) => match format {
+        ErrorOutputType::HumanReadable { kind, .. } => match kind {
             HumanReadableErrorType::AnnotateSnippet => "human-annotate-rs",
             HumanReadableErrorType::Unicode => "human-unicode",
             _ => return,

Diff for: compiler/rustc_session/src/lib.rs

@@ -1,5 +1,6 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![feature(default_field_values)]
 #![feature(iter_intersperse)]
 #![feature(let_chains)]
 #![feature(rustc_attrs)]

Diff for: compiler/rustc_session/src/session.rs

@@ -913,7 +913,7 @@ fn default_emitter(
     let source_map = if sopts.unstable_opts.link_only { None } else { Some(source_map) };
 
     match sopts.error_format {
-        config::ErrorOutputType::HumanReadable(kind, color_config) => {
+        config::ErrorOutputType::HumanReadable { kind, color_config } => {
             let short = kind.short();
 
             if let HumanReadableErrorType::AnnotateSnippet = kind {
@@ -1430,7 +1430,7 @@ fn mk_emitter(output: ErrorOutputType) -> Box<DynEmitter> {
     let fallback_bundle =
         fallback_fluent_bundle(vec![rustc_errors::DEFAULT_LOCALE_RESOURCE], false);
     let emitter: Box<DynEmitter> = match output {
-        config::ErrorOutputType::HumanReadable(kind, color_config) => {
+        config::ErrorOutputType::HumanReadable { kind, color_config } => {
             let short = kind.short();
             Box::new(
                 HumanEmitter::new(stderr_destination(color_config), fallback_bundle)