Auto merge of rust-lang#112361 - matthiaskrgr:rollup-39zxrw1, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#111250 (Add Terminator conversion from MIR to SMIR, part #2)
 - rust-lang#112310 (Add new Tier-3 targets: `loongarch64-unknown-none*`)
 - rust-lang#112334 (Add myself to highfive rotation)
 - rust-lang#112340 (remove `TyCtxt::has_error_field` helper method)
 - rust-lang#112343 (Prevent emitting `missing_docs` for `pub extern crate`)
 - rust-lang#112350 (Avoid duplicate type sanitization of local decls in borrowck)
 - rust-lang#112356 (Fix comment for `get_region_var_origins`)
 - rust-lang#112358 (Remove default visitor impl in region constraint generation)

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

Author: bors

compiler/rustc_borrowck/src/constraint_generation.rs

@@ -4,8 +4,8 @@ use rustc_infer::infer::InferCtxt;
 use rustc_middle::mir::visit::TyContext;
 use rustc_middle::mir::visit::Visitor;
 use rustc_middle::mir::{
-    BasicBlock, BasicBlockData, Body, Local, Location, Place, PlaceRef, ProjectionElem, Rvalue,
-    SourceInfo, Statement, StatementKind, Terminator, TerminatorKind, UserTypeProjection,
+    Body, Local, Location, Place, PlaceRef, ProjectionElem, Rvalue, SourceInfo, Statement,
+    StatementKind, Terminator, TerminatorKind, UserTypeProjection,
 };
 use rustc_middle::ty::subst::SubstsRef;
 use rustc_middle::ty::visit::TypeVisitable;
@@ -49,10 +49,6 @@ struct ConstraintGeneration<'cg, 'tcx> {
 }
 
 impl<'cg, 'tcx> Visitor<'tcx> for ConstraintGeneration<'cg, 'tcx> {
-    fn visit_basic_block_data(&mut self, bb: BasicBlock, data: &BasicBlockData<'tcx>) {
-        self.super_basic_block_data(bb, data);
-    }
-
     /// We sometimes have `substs` within an rvalue, or within a
     /// call. Make them live at the location where they appear.
     fn visit_substs(&mut self, substs: &SubstsRef<'tcx>, location: Location) {

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -477,9 +477,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
 
     fn visit_body(&mut self, body: &Body<'tcx>) {
         self.sanitize_type(&"return type", body.return_ty());
-        for local_decl in &body.local_decls {
-            self.sanitize_type(local_decl, local_decl.ty);
-        }
+        // The types of local_decls are checked above which is called in super_body.
         self.super_body(body);
     }
 }

compiler/rustc_hir_analysis/src/check/wfcheck.rs

@@ -1745,9 +1745,11 @@ fn check_variances_for_type_defn<'tcx>(
     item: &hir::Item<'tcx>,
     hir_generics: &hir::Generics<'_>,
 ) {
-    let ty = tcx.type_of(item.owner_id).subst_identity();
-    if tcx.has_error_field(ty) {
-        return;
+    let identity_substs = ty::InternalSubsts::identity_for_item(tcx, item.owner_id);
+    for field in tcx.adt_def(item.owner_id).all_fields() {
+        if field.ty(tcx, identity_substs).references_error() {
+            return;
+        }
     }
 
     let ty_predicates = tcx.predicates_of(item.owner_id);

compiler/rustc_infer/src/infer/mod.rs

@@ -1195,15 +1195,15 @@ impl<'tcx> InferCtxt<'tcx> {
             .var_origin(vid)
     }
 
-    /// Takes ownership of the list of variable regions. This implies
-    /// that all the region constraints have already been taken, and
-    /// hence that `resolve_regions_and_report_errors` can never be
-    /// called. This is used only during NLL processing to "hand off" ownership
-    /// of the set of region variables into the NLL region context.
+    /// Clone the list of variable regions. This is used only during NLL processing
+    /// to put the set of region variables into the NLL region context.
     pub fn get_region_var_origins(&self) -> VarInfos {
         let mut inner = self.inner.borrow_mut();
         let (var_infos, data) = inner
             .region_constraint_storage
+            // We clone instead of taking because borrowck still wants to use
+            // the inference context after calling this for diagnostics
+            // and the new trait solver.
             .clone()
             .expect("regions already resolved")
             .with_log(&mut inner.undo_log)

compiler/rustc_lint/src/builtin.rs

@@ -548,8 +548,12 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
 
     fn check_item(&mut self, cx: &LateContext<'_>, it: &hir::Item<'_>) {
         // Previously the Impl and Use types have been excluded from missing docs,
-        // so we will continue to exclude them for compatibility
-        if let hir::ItemKind::Impl(..) | hir::ItemKind::Use(..) = it.kind {
+        // so we will continue to exclude them for compatibility.
+        //
+        // The documentation on `ExternCrate` is not used at the moment so no need to warn for it.
+        if let hir::ItemKind::Impl(..) | hir::ItemKind::Use(..) | hir::ItemKind::ExternCrate(_) =
+            it.kind
+        {
             return;
         }
 

compiler/rustc_middle/src/ty/util.rs

@@ -173,18 +173,6 @@ impl<'tcx> TyCtxt<'tcx> {
         }
     }
 
-    pub fn has_error_field(self, ty: Ty<'tcx>) -> bool {
-        if let ty::Adt(def, substs) = *ty.kind() {
-            for field in def.all_fields() {
-                let field_ty = field.ty(self, substs);
-                if let ty::Error(_) = field_ty.kind() {
-                    return true;
-                }
-            }
-        }
-        false
-    }
-
     /// Attempts to returns the deeply last field of nested structures, but
     /// does not apply any normalization in its search. Returns the same type
     /// if input `ty` is not a structure at all.

compiler/rustc_smir/src/rustc_smir/mod.rs

@@ -330,10 +330,7 @@ fn rustc_terminator_to_terminator(
             target: target.as_usize(),
             unwind: rustc_unwind_to_unwind(unwind),
         },
-        Yield { .. } => todo!(),
-        GeneratorDrop => Terminator::GeneratorDrop,
-        FalseEdge { .. } => todo!(),
-        FalseUnwind { .. } => todo!(),
         InlineAsm { .. } => todo!(),
+        Yield { .. } | GeneratorDrop | FalseEdge { .. } | FalseUnwind { .. } => unreachable!(),
     }
 }

compiler/rustc_target/src/spec/loongarch64_unknown_none.rs

@@ -0,0 +1,23 @@
+use super::{Cc, CodeModel, LinkerFlavor, Lld, PanicStrategy};
+use super::{Target, TargetOptions};
+
+pub fn target() -> Target {
+    Target {
+        llvm_target: "loongarch64-unknown-none".into(),
+        pointer_width: 64,
+        data_layout: "e-m:e-p:64:64-i64:64-i128:128-n64-S128".into(),
+        arch: "loongarch64".into(),
+        options: TargetOptions {
+            cpu: "generic".into(),
+            features: "+f,+d".into(),
+            linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::No),
+            llvm_abiname: "lp64d".into(),
+            max_atomic_width: Some(64),
+            position_independent_executables: true,
+            static_position_independent_executables: true,
+            panic_strategy: PanicStrategy::Abort,
+            code_model: Some(CodeModel::Small),
+            ..Default::default()
+        },
+    }
+}

compiler/rustc_target/src/spec/loongarch64_unknown_none_softfloat.rs

@@ -0,0 +1,24 @@
+use super::{Cc, CodeModel, LinkerFlavor, Lld, PanicStrategy};
+use super::{Target, TargetOptions};
+
+pub fn target() -> Target {
+    Target {
+        llvm_target: "loongarch64-unknown-none-softfloat".into(),
+        pointer_width: 64,
+        data_layout: "e-m:e-p:64:64-i64:64-i128:128-n64-S128".into(),
+        arch: "loongarch64".into(),
+        options: TargetOptions {
+            cpu: "generic".into(),
+            features: "-f,-d".into(),
+            abi: "softfloat".into(),
+            linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::No),
+            llvm_abiname: "lp64s".into(),
+            max_atomic_width: Some(64),
+            position_independent_executables: true,
+            static_position_independent_executables: true,
+            panic_strategy: PanicStrategy::Abort,
+            code_model: Some(CodeModel::Small),
+            ..Default::default()
+        },
+    }
+}

compiler/rustc_target/src/spec/mod.rs

@@ -1294,6 +1294,9 @@ supported_targets! {
     ("riscv64gc-unknown-linux-gnu", riscv64gc_unknown_linux_gnu),
     ("riscv64gc-unknown-linux-musl", riscv64gc_unknown_linux_musl),
 
+    ("loongarch64-unknown-none", loongarch64_unknown_none),
+    ("loongarch64-unknown-none-softfloat", loongarch64_unknown_none_softfloat),
+
     ("aarch64-unknown-none", aarch64_unknown_none),
     ("aarch64-unknown-none-softfloat", aarch64_unknown_none_softfloat),