Rollup of 11 pull requests

compiler/rustc_ast/src/attr/mod.rs

@@ -33,10 +33,6 @@ impl MarkedAttrs {
     }
 }
 
-pub fn is_known_lint_tool(m_item: Ident) -> bool {
-    [sym::clippy, sym::rustc, sym::rustdoc].contains(&m_item.name)
-}
-
 impl NestedMetaItem {
     /// Returns the `MetaItem` if `self` is a `NestedMetaItem::MetaItem`.
     pub fn meta_item(&self) -> Option<&MetaItem> {

compiler/rustc_ast/src/token.rs

@@ -784,33 +784,6 @@ impl Nonterminal {
             NtTT(tt) => tt.span(),
         }
     }
-
-    /// This nonterminal looks like some specific enums from
-    /// `proc-macro-hack` and `procedural-masquerade` crates.
-    /// We need to maintain some special pretty-printing behavior for them due to incorrect
-    /// asserts in old versions of those crates and their wide use in the ecosystem.
-    /// See issue #73345 for more details.
-    /// FIXME(#73933): Remove this eventually.
-    pub fn pretty_printing_compatibility_hack(&self) -> bool {
-        let item = match self {
-            NtItem(item) => item,
-            NtStmt(stmt) => match &stmt.kind {
-                ast::StmtKind::Item(item) => item,
-                _ => return false,
-            },
-            _ => return false,
-        };
-
-        let name = item.ident.name;
-        if name == sym::ProceduralMasqueradeDummyType || name == sym::ProcMacroHack {
-            if let ast::ItemKind::Enum(enum_def, _) = &item.kind {
-                if let [variant] = &*enum_def.variants {
-                    return variant.ident.name == sym::Input;
-                }
-            }
-        }
-        false
-    }
 }
 
 impl PartialEq for Nonterminal {

compiler/rustc_builtin_macros/src/asm.rs

@@ -7,7 +7,10 @@ use rustc_errors::{Applicability, DiagnosticBuilder};
 use rustc_expand::base::{self, *};
 use rustc_parse::parser::Parser;
 use rustc_parse_format as parse;
-use rustc_span::symbol::{kw, sym, Symbol};
+use rustc_span::{
+    symbol::{kw, sym, Symbol},
+    BytePos,
+};
 use rustc_span::{InnerSpan, Span};
 
 struct AsmArgs {
@@ -399,6 +402,8 @@ fn expand_preparsed_asm(ecx: &mut ExtCtxt<'_>, sp: Span, args: AsmArgs) -> P<ast
     let mut line_spans = Vec::with_capacity(args.templates.len());
     let mut curarg = 0;
 
+    let default_dialect = ecx.sess.inline_asm_dialect();
+
     for template_expr in args.templates.into_iter() {
         if !template.is_empty() {
             template.push(ast::InlineAsmTemplatePiece::String("\n".to_string()));
@@ -424,6 +429,60 @@ fn expand_preparsed_asm(ecx: &mut ExtCtxt<'_>, sp: Span, args: AsmArgs) -> P<ast
 
         let template_str = &template_str.as_str();
         let template_snippet = ecx.source_map().span_to_snippet(template_sp).ok();
+
+        if let Some(snippet) = &template_snippet {
+            let snippet = snippet.trim_matches('"');
+            match default_dialect {
+                ast::LlvmAsmDialect::Intel => {
+                    if let Some(span) = check_syntax_directive(snippet, ".intel_syntax") {
+                        let span = template_span.from_inner(span);
+                        let mut err = ecx.struct_span_err(span, "intel syntax is the default syntax on this target, and trying to use this directive may cause issues");
+                        err.span_suggestion(
+                            span,
+                            "remove this assembler directive",
+                            "".to_string(),
+                            Applicability::MachineApplicable,
+                        );
+                        err.emit();
+                    }
+
+                    if let Some(span) = check_syntax_directive(snippet, ".att_syntax") {
+                        let span = template_span.from_inner(span);
+                        let mut err = ecx.struct_span_err(span, "using the .att_syntax directive may cause issues, use the att_syntax option instead");
+                        let asm_end = sp.hi() - BytePos(2);
+                        let suggestions = vec![
+                            (span, "".to_string()),
+                            (
+                                Span::new(asm_end, asm_end, sp.ctxt()),
+                                ", options(att_syntax)".to_string(),
+                            ),
+                        ];
+                        err.multipart_suggestion(
+                        "remove the assembler directive and replace it with options(att_syntax)",
+                        suggestions,
+                        Applicability::MachineApplicable,
+                    );
+                        err.emit();
+                    }
+                }
+                ast::LlvmAsmDialect::Att => {
+                    if let Some(span) = check_syntax_directive(snippet, ".att_syntax") {
+                        let span = template_span.from_inner(span);
+                        let mut err = ecx.struct_span_err(span, "att syntax is the default syntax on this target, and trying to use this directive may cause issues");
+                        err.span_suggestion(
+                            span,
+                            "remove this assembler directive",
+                            "".to_string(),
+                            Applicability::MachineApplicable,
+                        );
+                        err.emit();
+                    }
+
+                    // Use of .intel_syntax is ignored
+                }
+            }
+        }
+
         let mut parser = parse::Parser::new(
             template_str,
             str_style,
@@ -631,3 +690,15 @@ pub fn expand_asm<'cx>(
         }
     }
 }
+
+fn check_syntax_directive<S: AsRef<str>>(piece: S, syntax: &str) -> Option<InnerSpan> {
+    let piece = piece.as_ref();
+    if let Some(idx) = piece.find(syntax) {
+        let end =
+            idx + &piece[idx..].find(|c| matches!(c, '\n' | ';')).unwrap_or(piece[idx..].len());
+        // Offset by one because these represent the span with the " removed
+        Some(InnerSpan::new(idx + 1, end + 1))
+    } else {
+        None
+    }
+}

compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs

@@ -254,7 +254,7 @@ fn save_function_record(
 ///
 /// 1. The file name of an "Unreachable" function must match the file name of the existing
 ///    codegenned (covered) function to which the unreachable code regions will be added.
-/// 2. The function to which the unreachable code regions will be added must not be a genaric
+/// 2. The function to which the unreachable code regions will be added must not be a generic
 ///    function (must not have type parameters) because the coverage tools will get confused
 ///    if the codegenned function has more than one instantiation and additional `CodeRegion`s
 ///    attached to only one of those instantiations.
@@ -284,7 +284,7 @@ fn add_unreachable_coverage<'tcx>(
     let all_def_ids: DefIdSet =
         tcx.mir_keys(LOCAL_CRATE).iter().map(|local_def_id| local_def_id.to_def_id()).collect();
 
-    let (codegenned_def_ids, _) = tcx.collect_and_partition_mono_items(LOCAL_CRATE);
+    let codegenned_def_ids = tcx.codegened_and_inlined_items(LOCAL_CRATE);
 
     let mut unreachable_def_ids_by_file: FxHashMap<Symbol, Vec<DefId>> = FxHashMap::default();
     for &non_codegenned_def_id in all_def_ids.difference(codegenned_def_ids) {

compiler/rustc_codegen_ssa/src/coverageinfo/map.rs

@@ -8,7 +8,7 @@ use rustc_middle::mir::coverage::{
 use rustc_middle::ty::Instance;
 use rustc_middle::ty::TyCtxt;
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub struct Expression {
     lhs: ExpressionOperandId,
     op: Op,
@@ -64,7 +64,9 @@ impl<'tcx> FunctionCoverage<'tcx> {
 
     /// Adds a code region to be counted by an injected counter intrinsic.
     pub fn add_counter(&mut self, id: CounterValueReference, region: CodeRegion) {
-        self.counters[id].replace(region).expect_none("add_counter called with duplicate `id`");
+        if let Some(previous_region) = self.counters[id].replace(region.clone()) {
+            assert_eq!(previous_region, region, "add_counter: code region for id changed");
+        }
     }
 
     /// Both counters and "counter expressions" (or simply, "expressions") can be operands in other
@@ -94,9 +96,18 @@ impl<'tcx> FunctionCoverage<'tcx> {
             expression_id, lhs, op, rhs, region
         );
         let expression_index = self.expression_index(u32::from(expression_id));
-        self.expressions[expression_index]
-            .replace(Expression { lhs, op, rhs, region })
-            .expect_none("add_counter_expression called with duplicate `id_descending_from_max`");
+        if let Some(previous_expression) = self.expressions[expression_index].replace(Expression {
+            lhs,
+            op,
+            rhs,
+            region: region.clone(),
+        }) {
+            assert_eq!(
+                previous_expression,
+                Expression { lhs, op, rhs, region },
+                "add_counter_expression: expression for id changed"
+            );
+        }
     }
 
     /// Add a region that will be marked as "unreachable", with a constant "zero counter".

compiler/rustc_codegen_ssa/src/mir/coverageinfo.rs

@@ -2,27 +2,38 @@ use crate::traits::*;
 
 use rustc_middle::mir::coverage::*;
 use rustc_middle::mir::Coverage;
+use rustc_middle::mir::SourceScope;
 
 use super::FunctionCx;
 
 impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
-    pub fn codegen_coverage(&self, bx: &mut Bx, coverage: Coverage) {
+    pub fn codegen_coverage(&self, bx: &mut Bx, coverage: Coverage, scope: SourceScope) {
+        // Determine the instance that coverage data was originally generated for.
+        let scope_data = &self.mir.source_scopes[scope];
+        let instance = if let Some((inlined_instance, _)) = scope_data.inlined {
+            self.monomorphize(inlined_instance)
+        } else if let Some(inlined_scope) = scope_data.inlined_parent_scope {
+            self.monomorphize(self.mir.source_scopes[inlined_scope].inlined.unwrap().0)
+        } else {
+            self.instance
+        };
+
         let Coverage { kind, code_region } = coverage;
         match kind {
             CoverageKind::Counter { function_source_hash, id } => {
-                if bx.set_function_source_hash(self.instance, function_source_hash) {
+                if bx.set_function_source_hash(instance, function_source_hash) {
                     // If `set_function_source_hash()` returned true, the coverage map is enabled,
                     // so continue adding the counter.
                     if let Some(code_region) = code_region {
                         // Note: Some counters do not have code regions, but may still be referenced
                         // from expressions. In that case, don't add the counter to the coverage map,
                         // but do inject the counter intrinsic.
-                        bx.add_coverage_counter(self.instance, id, code_region);
+                        bx.add_coverage_counter(instance, id, code_region);
                     }
 
-                    let coverageinfo = bx.tcx().coverageinfo(self.instance.def_id());
+                    let coverageinfo = bx.tcx().coverageinfo(instance.def_id());
 
-                    let fn_name = bx.create_pgo_func_name_var(self.instance);
+                    let fn_name = bx.create_pgo_func_name_var(instance);
                     let hash = bx.const_u64(function_source_hash);
                     let num_counters = bx.const_u32(coverageinfo.num_counters);
                     let index = bx.const_u32(u32::from(id));
@@ -34,11 +45,11 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 }
             }
             CoverageKind::Expression { id, lhs, op, rhs } => {
-                bx.add_coverage_counter_expression(self.instance, id, lhs, op, rhs, code_region);
+                bx.add_coverage_counter_expression(instance, id, lhs, op, rhs, code_region);
             }
             CoverageKind::Unreachable => {
                 bx.add_coverage_unreachable(
-                    self.instance,
+                    instance,
                     code_region.expect("unreachable regions always have code regions"),
                 );
             }

compiler/rustc_codegen_ssa/src/mir/statement.rs

@@ -112,7 +112,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 bx
             }
             mir::StatementKind::Coverage(box ref coverage) => {
-                self.codegen_coverage(&mut bx, coverage.clone());
+                self.codegen_coverage(&mut bx, coverage.clone(), statement.source_info.scope);
                 bx
             }
             mir::StatementKind::CopyNonOverlapping(box mir::CopyNonOverlapping {

compiler/rustc_expand/src/base.rs

@@ -10,6 +10,8 @@ use rustc_attr::{self as attr, Deprecation, Stability};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::sync::{self, Lrc};
 use rustc_errors::{DiagnosticBuilder, ErrorReported};
+use rustc_lint_defs::builtin::PROC_MACRO_BACK_COMPAT;
+use rustc_lint_defs::BuiltinLintDiagnostics;
 use rustc_parse::{self, nt_to_tokenstream, parser, MACRO_ARGUMENTS};
 use rustc_session::{parse::ParseSess, Limit, Session};
 use rustc_span::def_id::DefId;
@@ -1241,3 +1243,41 @@ pub fn get_exprs_from_tts(
     }
     Some(es)
 }
+
+/// This nonterminal looks like some specific enums from
+/// `proc-macro-hack` and `procedural-masquerade` crates.
+/// We need to maintain some special pretty-printing behavior for them due to incorrect
+/// asserts in old versions of those crates and their wide use in the ecosystem.
+/// See issue #73345 for more details.
+/// FIXME(#73933): Remove this eventually.
+pub(crate) fn pretty_printing_compatibility_hack(nt: &Nonterminal, sess: &ParseSess) -> bool {
+    let item = match nt {
+        Nonterminal::NtItem(item) => item,
+        Nonterminal::NtStmt(stmt) => match &stmt.kind {
+            ast::StmtKind::Item(item) => item,
+            _ => return false,
+        },
+        _ => return false,
+    };
+
+    let name = item.ident.name;
+    if name == sym::ProceduralMasqueradeDummyType {
+        if let ast::ItemKind::Enum(enum_def, _) = &item.kind {
+            if let [variant] = &*enum_def.variants {
+                if variant.ident.name == sym::Input {
+                    sess.buffer_lint_with_diagnostic(
+                        &PROC_MACRO_BACK_COMPAT,
+                        item.ident.span,
+                        ast::CRATE_NODE_ID,
+                        "using `procedural-masquerade` crate",
+                        BuiltinLintDiagnostics::ProcMacroBackCompat(
+                        "The `procedural-masquerade` crate has been unnecessary since Rust 1.30.0. \
+                        Versions of this crate below 0.1.7 will eventually stop compiling.".to_string())
+                    );
+                    return true;
+                }
+            }
+        }
+    }
+    false
+}

compiler/rustc_expand/src/proc_macro.rs

@@ -90,7 +90,8 @@ impl MultiItemModifier for ProcMacroDerive {
             }
             _ => unreachable!(),
         };
-        let input = if item.pretty_printing_compatibility_hack() {
+        let input = if crate::base::pretty_printing_compatibility_hack(&item, &ecx.sess.parse_sess)
+        {
             TokenTree::token(token::Interpolated(Lrc::new(item)), DUMMY_SP).into()
         } else {
             nt_to_tokenstream(&item, &ecx.sess.parse_sess, CanSynthesizeMissingTokens::Yes)

compiler/rustc_expand/src/proc_macro_server.rs

@@ -187,7 +187,7 @@ impl FromInternal<(TreeAndSpacing, &'_ ParseSess, &'_ mut Vec<Self>)>
                         delimiter: Delimiter::None,
                         stream,
                         span: DelimSpan::from_single(span),
-                        flatten: nt.pretty_printing_compatibility_hack(),
+                        flatten: crate::base::pretty_printing_compatibility_hack(&nt, sess),
                     })
                 }
             }

compiler/rustc_lint/src/context.rs

@@ -748,7 +748,7 @@ impl<'a> EarlyContext<'a> {
             sess,
             krate,
             lint_store,
-            builder: LintLevelsBuilder::new(sess, warn_about_weird_lints, lint_store),
+            builder: LintLevelsBuilder::new(sess, warn_about_weird_lints, lint_store, &krate.attrs),
             buffered,
         }
     }