Auto merge of rust-lang#123484 - jhpratt:rollup-usz4e64, r=jhpratt

Rollup of 9 pull requests

Successful merges:

 - rust-lang#123206 (Require Pointee::Metadata to be Freeze)
 - rust-lang#123363 (change `NormalizesTo` to fully structurally normalize)
 - rust-lang#123407 (Default to light theme if JS is enabled but not working)
 - rust-lang#123417 (Add Description for cargo in rustdoc documentation)
 - rust-lang#123437 (Manually run `clang-format` on `CoverageMappingWrapper.cpp`)
 - rust-lang#123454 (hir: Use `ItemLocalId::ZERO` in a couple more places)
 - rust-lang#123464 (Cleanup: Rename `HAS_PROJECTIONS` to `HAS_ALIASES` etc.)
 - rust-lang#123477 (do not ICE in `fn forced_ambiguity` if we get an error)
 - rust-lang#123478 (CFI: Add test for `call_once` addr taken)

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

Author: bors

Diff for: compiler/rustc_ast_lowering/src/index.rs

@@ -19,7 +19,7 @@ struct NodeCollector<'a, 'hir> {
     parenting: LocalDefIdMap<ItemLocalId>,
 
     /// The parent of this node
-    parent_node: hir::ItemLocalId,
+    parent_node: ItemLocalId,
 
     owner: OwnerId,
 }
@@ -31,17 +31,16 @@ pub(super) fn index_hir<'hir>(
     bodies: &SortedMap<ItemLocalId, &'hir Body<'hir>>,
     num_nodes: usize,
 ) -> (IndexVec<ItemLocalId, ParentedNode<'hir>>, LocalDefIdMap<ItemLocalId>) {
-    let zero_id = ItemLocalId::ZERO;
-    let err_node = ParentedNode { parent: zero_id, node: Node::Err(item.span()) };
+    let err_node = ParentedNode { parent: ItemLocalId::ZERO, node: Node::Err(item.span()) };
     let mut nodes = IndexVec::from_elem_n(err_node, num_nodes);
     // This node's parent should never be accessed: the owner's parent is computed by the
     // hir_owner_parent query. Make it invalid (= ItemLocalId::MAX) to force an ICE whenever it is
     // used.
-    nodes[zero_id] = ParentedNode { parent: ItemLocalId::INVALID, node: item.into() };
+    nodes[ItemLocalId::ZERO] = ParentedNode { parent: ItemLocalId::INVALID, node: item.into() };
     let mut collector = NodeCollector {
         tcx,
         owner: item.def_id(),
-        parent_node: zero_id,
+        parent_node: ItemLocalId::ZERO,
         nodes,
         bodies,
         parenting: Default::default(),
@@ -112,7 +111,7 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
     }
 
     fn insert_nested(&mut self, item: LocalDefId) {
-        if self.parent_node.as_u32() != 0 {
+        if self.parent_node != ItemLocalId::ZERO {
             self.parenting.insert(item, self.parent_node);
         }
     }

Diff for: compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs

@@ -461,7 +461,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     where
         T: TypeVisitable<TyCtxt<'tcx>>,
     {
-        t.has_free_regions() || t.has_projections() || t.has_infer_types()
+        t.has_free_regions() || t.has_aliases() || t.has_infer_types()
     }
 
     pub fn node_ty(&self, id: hir::HirId) -> Ty<'tcx> {

Diff for: compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp

@@ -1,8 +1,8 @@
 #include "LLVMWrapper.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ProfileData/Coverage/CoverageMapping.h"
 #include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
 #include "llvm/ProfileData/InstrProf.h"
-#include "llvm/ADT/ArrayRef.h"
 
 #include <iostream>
 
@@ -103,35 +103,30 @@ fromRust(LLVMRustCounterExprKind Kind) {
 }
 
 extern "C" void LLVMRustCoverageWriteFilenamesSectionToBuffer(
-    const char *const Filenames[],
-    size_t FilenamesLen,
-    const size_t *const Lengths,
-    size_t LengthsLen,
+    const char *const Filenames[], size_t FilenamesLen, // String start pointers
+    const size_t *const Lengths, size_t LengthsLen,     // Corresponding lengths
     RustStringRef BufferOut) {
   if (FilenamesLen != LengthsLen) {
     report_fatal_error(
         "Mismatched lengths in LLVMRustCoverageWriteFilenamesSectionToBuffer");
   }
 
-  SmallVector<std::string,32> FilenameRefs;
+  SmallVector<std::string, 32> FilenameRefs;
   FilenameRefs.reserve(FilenamesLen);
   for (size_t i = 0; i < FilenamesLen; i++) {
     FilenameRefs.emplace_back(Filenames[i], Lengths[i]);
   }
-  auto FilenamesWriter =
-      coverage::CoverageFilenamesSectionWriter(ArrayRef<std::string>(FilenameRefs));
+  auto FilenamesWriter = coverage::CoverageFilenamesSectionWriter(
+      ArrayRef<std::string>(FilenameRefs));
   auto OS = RawRustStringOstream(BufferOut);
   FilenamesWriter.write(OS);
 }
 
 extern "C" void LLVMRustCoverageWriteMappingToBuffer(
-    const unsigned *VirtualFileMappingIDs,
-    unsigned NumVirtualFileMappingIDs,
-    const LLVMRustCounterExpression *RustExpressions,
-    unsigned NumExpressions,
+    const unsigned *VirtualFileMappingIDs, unsigned NumVirtualFileMappingIDs,
+    const LLVMRustCounterExpression *RustExpressions, unsigned NumExpressions,
     const LLVMRustCounterMappingRegion *RustMappingRegions,
-    unsigned NumMappingRegions,
-    RustStringRef BufferOut) {
+    unsigned NumMappingRegions, RustStringRef BufferOut) {
   // Convert from FFI representation to LLVM representation.
   SmallVector<coverage::CounterMappingRegion, 0> MappingRegions;
   MappingRegions.reserve(NumMappingRegions);
@@ -142,7 +137,7 @@ extern "C" void LLVMRustCoverageWriteMappingToBuffer(
 #if LLVM_VERSION_GE(18, 0) && LLVM_VERSION_LT(19, 0)
         coverage::CounterMappingRegion::MCDCParameters{},
 #endif
-        Region.FileID, Region.ExpandedFileID,
+        Region.FileID, Region.ExpandedFileID, // File IDs, then region info.
         Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,
         fromRust(Region.Kind));
   }
@@ -158,29 +153,25 @@ extern "C" void LLVMRustCoverageWriteMappingToBuffer(
 
   auto CoverageMappingWriter = coverage::CoverageMappingWriter(
       ArrayRef<unsigned>(VirtualFileMappingIDs, NumVirtualFileMappingIDs),
-      Expressions,
-      MappingRegions);
+      Expressions, MappingRegions);
   auto OS = RawRustStringOstream(BufferOut);
   CoverageMappingWriter.write(OS);
 }
 
-extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(
-    LLVMValueRef F,
-    const char *FuncName,
-    size_t FuncNameLen) {
+extern "C" LLVMValueRef
+LLVMRustCoverageCreatePGOFuncNameVar(LLVMValueRef F, const char *FuncName,
+                                     size_t FuncNameLen) {
   auto FuncNameRef = StringRef(FuncName, FuncNameLen);
   return wrap(createPGOFuncNameVar(*cast<Function>(unwrap(F)), FuncNameRef));
 }
 
-extern "C" uint64_t LLVMRustCoverageHashByteArray(
-    const char *Bytes,
-    size_t NumBytes) {
+extern "C" uint64_t LLVMRustCoverageHashByteArray(const char *Bytes,
+                                                  size_t NumBytes) {
   auto StrRef = StringRef(Bytes, NumBytes);
   return IndexedInstrProf::ComputeHash(StrRef);
 }
 
-static void WriteSectionNameToString(LLVMModuleRef M,
-                                     InstrProfSectKind SK,
+static void WriteSectionNameToString(LLVMModuleRef M, InstrProfSectKind SK,
                                      RustStringRef Str) {
   auto TargetTriple = Triple(unwrap(M)->getTargetTriple());
   auto name = getInstrProfSectionName(SK, TargetTriple.getObjectFormat());
@@ -193,8 +184,9 @@ extern "C" void LLVMRustCoverageWriteMapSectionNameToString(LLVMModuleRef M,
   WriteSectionNameToString(M, IPSK_covmap, Str);
 }
 
-extern "C" void LLVMRustCoverageWriteFuncSectionNameToString(LLVMModuleRef M,
-                                                             RustStringRef Str) {
+extern "C" void
+LLVMRustCoverageWriteFuncSectionNameToString(LLVMModuleRef M,
+                                             RustStringRef Str) {
   WriteSectionNameToString(M, IPSK_covfun, Str);
 }
 

Diff for: compiler/rustc_middle/src/hir/mod.rs

@@ -179,7 +179,7 @@ pub fn provide(providers: &mut Providers) {
                     .parenting
                     .get(&owner_id.def_id)
                     .copied()
-                    .unwrap_or(ItemLocalId::from_u32(0)),
+                    .unwrap_or(ItemLocalId::ZERO),
             }
         })
     };

Diff for: compiler/rustc_middle/src/traits/solve/inspect.rs

@@ -121,8 +121,6 @@ pub enum ProbeStep<'tcx> {
     /// used whenever there are multiple candidates to prove the
     /// current goalby .
     NestedProbe(Probe<'tcx>),
-    CommitIfOkStart,
-    CommitIfOkSuccess,
 }
 
 /// What kind of probe we're in. In case the probe represents a candidate, or
@@ -132,6 +130,8 @@ pub enum ProbeStep<'tcx> {
 pub enum ProbeKind<'tcx> {
     /// The root inference context while proving a goal.
     Root { result: QueryResult<'tcx> },
+    /// Trying to normalize an alias by at least one stpe in `NormalizesTo`.
+    TryNormalizeNonRigid { result: QueryResult<'tcx> },
     /// Probe entered when normalizing the self ty during candidate assembly
     NormalizedSelfTyAssembly,
     /// Some candidate to prove the current goal.
@@ -143,9 +143,6 @@ pub enum ProbeKind<'tcx> {
     /// Used in the probe that wraps normalizing the non-self type for the unsize
     /// trait, which is also structurally matched on.
     UnsizeAssembly,
-    /// A call to `EvalCtxt::commit_if_ok` which failed, causing the work
-    /// to be discarded.
-    CommitIfOk,
     /// During upcasting from some source object to target object type, used to
     /// do a probe to find out what projection type(s) may be used to prove that
     /// the source type upholds all of the target type's object bounds.

Diff for: compiler/rustc_middle/src/traits/solve/inspect/format.rs

@@ -100,6 +100,9 @@ impl<'a, 'b> ProofTreeFormatter<'a, 'b> {
             ProbeKind::Root { result } => {
                 write!(self.f, "ROOT RESULT: {result:?}")
             }
+            ProbeKind::TryNormalizeNonRigid { result } => {
+                write!(self.f, "TRY NORMALIZE NON-RIGID: {result:?}")
+            }
             ProbeKind::NormalizedSelfTyAssembly => {
                 write!(self.f, "NORMALIZING SELF TY FOR ASSEMBLY:")
             }
@@ -109,9 +112,6 @@ impl<'a, 'b> ProofTreeFormatter<'a, 'b> {
             ProbeKind::UpcastProjectionCompatibility => {
                 write!(self.f, "PROBING FOR PROJECTION COMPATIBILITY FOR UPCASTING:")
             }
-            ProbeKind::CommitIfOk => {
-                write!(self.f, "COMMIT_IF_OK:")
-            }
             ProbeKind::MiscCandidate { name, result } => {
                 write!(self.f, "CANDIDATE {name}: {result:?}")
             }
@@ -132,8 +132,6 @@ impl<'a, 'b> ProofTreeFormatter<'a, 'b> {
                     }
                     ProbeStep::EvaluateGoals(eval) => this.format_added_goals_evaluation(eval)?,
                     ProbeStep::NestedProbe(probe) => this.format_probe(probe)?,
-                    ProbeStep::CommitIfOkStart => writeln!(this.f, "COMMIT_IF_OK START")?,
-                    ProbeStep::CommitIfOkSuccess => writeln!(this.f, "COMMIT_IF_OK SUCCESS")?,
                 }
             }
             Ok(())

Diff for: compiler/rustc_middle/src/ty/normalize_erasing_regions.rs

@@ -49,7 +49,7 @@ impl<'tcx> TyCtxt<'tcx> {
         let value = self.erase_regions(value);
         debug!(?value);
 
-        if !value.has_projections() {
+        if !value.has_aliases() {
             value
         } else {
             value.fold_with(&mut NormalizeAfterErasingRegionsFolder { tcx: self, param_env })
@@ -81,7 +81,7 @@ impl<'tcx> TyCtxt<'tcx> {
         let value = self.erase_regions(value);
         debug!(?value);
 
-        if !value.has_projections() {
+        if !value.has_aliases() {
             Ok(value)
         } else {
             let mut folder = TryNormalizeAfterErasingRegionsFolder::new(self, param_env);

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

@@ -1077,7 +1077,7 @@ fn try_instance_mir<'tcx>(
         let fields = def.all_fields();
         for field in fields {
             let field_ty = field.ty(tcx, args);
-            if field_ty.has_param() && field_ty.has_projections() {
+            if field_ty.has_param() && field_ty.has_aliases() {
                 return Err("cannot build drop shim for polymorphic type");
             }
         }