Rollup of 7 pull requests

.github/FUNDING.yml

@@ -1 +1,2 @@
+github: rustfoundation
 custom: ["rust-lang.org/funding"]

compiler/rustc_builtin_macros/src/format.rs

@@ -987,6 +987,7 @@ fn report_invalid_references(
         // Collect all the implicit positions:
         let mut spans = Vec::new();
         let mut num_placeholders = 0;
+        let mut has_white_space_only_missing_arg = false;
         for piece in template {
             let mut placeholder = None;
             // `{arg:.*}`
@@ -1009,13 +1010,21 @@ fn report_invalid_references(
             }
             // `{}`
             if let FormatArgsPiece::Placeholder(FormatPlaceholder {
-                argument: FormatArgPosition { kind: FormatArgPositionKind::Implicit, .. },
+                argument: FormatArgPosition { kind: FormatArgPositionKind::Implicit, index, .. },
                 span,
                 ..
             }) = piece
             {
                 placeholder = *span;
                 num_placeholders += 1;
+                //  Check whether there's any non-space whitespace in the placeholder. If so, we should emit a note suggesting an escaping `{`.
+                if index.is_err()
+                    && let Some(span) = span
+                    && let Ok(snippet) = ecx.source_map().span_to_snippet(*span)
+                    && snippet.chars().any(|c| c.is_whitespace() && c != ' ')
+                {
+                    has_white_space_only_missing_arg = true;
+                }
             }
             // For `{:.*}`, we only push one span.
             spans.extend(placeholder);
@@ -1071,6 +1080,9 @@ fn report_invalid_references(
         if has_precision_star {
             e.note("positional arguments are zero-based");
         }
+        if has_white_space_only_missing_arg {
+            e.note("if you intended to print `{`, you can escape it with `{{`");
+        }
     } else {
         let mut indexes: Vec<_> = invalid_refs.iter().map(|&(index, _, _, _)| index).collect();
         // Avoid `invalid reference to positional arguments 7 and 7 (there is 1 argument)`

compiler/rustc_codegen_llvm/src/debuginfo/metadata/enums/mod.rs

@@ -21,8 +21,8 @@ use crate::debuginfo::metadata::{
     file_metadata_from_def_id, type_di_node, unknown_file_metadata,
 };
 use crate::debuginfo::utils::{DIB, create_DIArray, get_namespace_for_item};
-use crate::llvm;
 use crate::llvm::debuginfo::{DIFlags, DIType};
+use crate::llvm::{self, ToLlvmBool};
 
 mod cpp_like;
 mod native;
@@ -111,16 +111,23 @@ fn build_enumeration_type_di_node<'ll, 'tcx>(
     let (size, align) = cx.size_and_align_of(base_type);
 
     let enumerator_di_nodes: SmallVec<Option<&'ll DIType>> = enumerators
-        .map(|(name, value)| unsafe {
-            let value = [value as u64, (value >> 64) as u64];
-            Some(llvm::LLVMRustDIBuilderCreateEnumerator(
-                DIB(cx),
-                name.as_c_char_ptr(),
-                name.len(),
-                value.as_ptr(),
-                size.bits() as libc::c_uint,
-                is_unsigned,
-            ))
+        .map(|(name, value)| {
+            let value_words = [value as u64, (value >> 64) as u64];
+            let size_in_bits = size.bits();
+            // LLVM computes `NumWords = (SizeInBits + 63) / 64`.
+            assert!((size_in_bits + 63) / 64 <= value_words.len() as u64);
+
+            let enumerator = unsafe {
+                llvm::LLVMDIBuilderCreateEnumeratorOfArbitraryPrecision(
+                    DIB(cx),
+                    name.as_ptr(),
+                    name.len(),
+                    size_in_bits,
+                    value_words.as_ptr(),
+                    is_unsigned.to_llvm_bool(),
+                )
+            };
+            Some(enumerator)
         })
         .collect();
 

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -22,9 +22,8 @@ use libc::{c_char, c_int, c_uchar, c_uint, c_ulonglong, c_void, size_t};
 
 use super::RustString;
 use super::debuginfo::{
-    DIArray, DIBuilder, DIDerivedType, DIDescriptor, DIEnumerator, DIFile, DIFlags, DILocation,
-    DISPFlags, DIScope, DISubprogram, DITemplateTypeParameter, DIType, DebugEmissionKind,
-    DebugNameTableKind,
+    DIArray, DIBuilder, DIDerivedType, DIDescriptor, DIFile, DIFlags, DILocation, DISPFlags,
+    DIScope, DISubprogram, DITemplateTypeParameter, DIType, DebugEmissionKind, DebugNameTableKind,
 };
 use crate::llvm::MetadataKindId;
 use crate::{TryFromU32, llvm};
@@ -752,7 +751,6 @@ pub(crate) mod debuginfo {
     pub(crate) type DICompositeType = DIDerivedType;
     pub(crate) type DIVariable = DIDescriptor;
     pub(crate) type DIArray = DIDescriptor;
-    pub(crate) type DIEnumerator = DIDescriptor;
     pub(crate) type DITemplateTypeParameter = DIDescriptor;
 
     bitflags! {
@@ -1794,6 +1792,15 @@ unsafe extern "C" {
         Flags: DIFlags, // (default is `DIFlags::DIFlagZero`)
     ) -> &'ll Metadata;
 
+    pub(crate) fn LLVMDIBuilderCreateEnumeratorOfArbitraryPrecision<'ll>(
+        Builder: &DIBuilder<'ll>,
+        Name: *const c_uchar, // See "PTR_LEN_STR".
+        NameLen: size_t,
+        SizeInBits: u64,
+        Words: *const u64, // LLVM computes `NumWords = (SizeInBits + 63) / 64`.
+        IsUnsigned: llvm::Bool,
+    ) -> &'ll Metadata;
+
     pub(crate) fn LLVMDIBuilderCreateUnionType<'ll>(
         Builder: &DIBuilder<'ll>,
         Scope: Option<&'ll Metadata>,
@@ -1989,6 +1996,7 @@ unsafe extern "C" {
     pub(crate) fn LLVMRustDisableSystemDialogsOnCrash();
 
     // Operations on all values
+    /// FIXME: After dropping LLVM 21, migrate to LLVM-C's `LLVMGlobalAddMetadata`.
     pub(crate) fn LLVMRustGlobalAddMetadata<'a>(
         Val: &'a Value,
         KindID: MetadataKindId,
@@ -2058,6 +2066,7 @@ unsafe extern "C" {
     ) -> &Attribute;
 
     // Operations on functions
+    /// FIXME: After dropping LLVM 21, migrate to LLVM-C's `LLVMGetOrInsertFunction`.
     pub(crate) fn LLVMRustGetOrInsertFunction<'a>(
         M: &'a Module,
         Name: *const c_char,
@@ -2208,6 +2217,9 @@ unsafe extern "C" {
         ValueLen: size_t,
     );
 
+    /// We can't use LLVM-C's `LLVMDIBuilderCreateCompileUnit` because it hardcodes
+    /// `DICompileUnit::DebugNameTableKind::Default`, but we want to be able to
+    /// pass other values.
     pub(crate) fn LLVMRustDIBuilderCreateCompileUnit<'a>(
         Builder: &DIBuilder<'a>,
         Lang: c_uint,
@@ -2225,6 +2237,8 @@ unsafe extern "C" {
         DebugNameTableKind: DebugNameTableKind,
     ) -> &'a DIDescriptor;
 
+    /// We can't use LLVM-C's `LLVMDIBuilderCreateFileWithChecksum` because it
+    /// _requires_ a checksum, but we sometimes don't provide one.
     pub(crate) fn LLVMRustDIBuilderCreateFile<'a>(
         Builder: &DIBuilder<'a>,
         Filename: *const c_char,
@@ -2238,6 +2252,8 @@ unsafe extern "C" {
         SourceLen: size_t,
     ) -> &'a DIFile;
 
+    /// We can't use LLVM-C's `LLVMDIBuilderCreateFunction` because it only
+    /// supports a subset of `DISubprogram::DISPFlags`.
     pub(crate) fn LLVMRustDIBuilderCreateFunction<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIDescriptor,
@@ -2256,6 +2272,7 @@ unsafe extern "C" {
         Decl: Option<&'a DIDescriptor>,
     ) -> &'a DISubprogram;
 
+    /// As of LLVM 22 there is no corresponding LLVM-C function.
     pub(crate) fn LLVMRustDIBuilderCreateMethod<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIDescriptor,
@@ -2271,6 +2288,7 @@ unsafe extern "C" {
         TParam: &'a DIArray,
     ) -> &'a DISubprogram;
 
+    /// As of LLVM 22 there is no corresponding LLVM-C function.
     pub(crate) fn LLVMRustDIBuilderCreateVariantMemberType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIScope,
@@ -2286,15 +2304,7 @@ unsafe extern "C" {
         Ty: &'a DIType,
     ) -> &'a DIType;
 
-    pub(crate) fn LLVMRustDIBuilderCreateEnumerator<'a>(
-        Builder: &DIBuilder<'a>,
-        Name: *const c_char,
-        NameLen: size_t,
-        Value: *const u64,
-        SizeInBits: c_uint,
-        IsUnsigned: bool,
-    ) -> &'a DIEnumerator;
-
+    /// As of LLVM 22 there is no corresponding LLVM-C function.
     pub(crate) fn LLVMRustDIBuilderCreateEnumerationType<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIScope,
@@ -2309,6 +2319,7 @@ unsafe extern "C" {
         IsScoped: bool,
     ) -> &'a DIType;
 
+    /// As of LLVM 22 there is no corresponding LLVM-C function.
     pub(crate) fn LLVMRustDIBuilderCreateVariantPart<'a>(
         Builder: &DIBuilder<'a>,
         Scope: &'a DIScope,
@@ -2325,6 +2336,7 @@ unsafe extern "C" {
         UniqueIdLen: size_t,
     ) -> &'a DIDerivedType;
 
+    /// As of LLVM 22 there is no corresponding LLVM-C function.
     pub(crate) fn LLVMRustDIBuilderCreateTemplateTypeParameter<'a>(
         Builder: &DIBuilder<'a>,
         Scope: Option<&'a DIScope>,
@@ -2333,13 +2345,17 @@ unsafe extern "C" {
         Ty: &'a DIType,
     ) -> &'a DITemplateTypeParameter;
 
+    /// We can't use LLVM-C's `LLVMReplaceArrays` because it doesn't take a
+    /// `Params` argument.
     pub(crate) fn LLVMRustDICompositeTypeReplaceArrays<'a>(
         Builder: &DIBuilder<'a>,
         CompositeType: &'a DIType,
         Elements: Option<&'a DIArray>,
         Params: Option<&'a DIArray>,
     );
 
+    /// We can't use LLVM-C's `LLVMDIBuilderGetOrCreateSubrange` because it doesn't
+    /// call the overload that takes a `Metadata` upper bound.
     pub(crate) fn LLVMRustDIGetOrCreateSubrange<'a>(
         Builder: &DIBuilder<'a>,
         CountNode: Option<&'a Metadata>,
@@ -2348,6 +2364,8 @@ unsafe extern "C" {
         Stride: Option<&'a Metadata>,
     ) -> &'a Metadata;
 
+    /// We can't use LLVM-C's `LLVMDIBuilderCreateVectorType` because it doesn't
+    /// take a `BitStride` argument.
     pub(crate) fn LLVMRustDICreateVectorType<'a>(
         Builder: &DIBuilder<'a>,
         Size: u64,
@@ -2357,6 +2375,7 @@ unsafe extern "C" {
         BitStride: Option<&'a Metadata>,
     ) -> &'a Metadata;
 
+    /// As of LLVM 22 there is no corresponding LLVM-C function.
     pub(crate) fn LLVMRustDILocationCloneWithBaseDiscriminator<'a>(
         Location: &'a DILocation,
         BD: c_uint,

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -18,7 +18,7 @@ use rustc_hir_analysis::hir_ty_lowering::HirTyLowerer;
 use rustc_hir_analysis::suggest_impl_trait;
 use rustc_middle::middle::stability::EvalResult;
 use rustc_middle::span_bug;
-use rustc_middle::ty::print::with_no_trimmed_paths;
+use rustc_middle::ty::print::{with_no_trimmed_paths, with_types_for_suggestion};
 use rustc_middle::ty::{
     self, Article, Binder, IsSuggestable, Ty, TyCtxt, TypeVisitableExt, Unnormalized, Upcast,
     suggest_constraining_type_params,
@@ -2679,8 +2679,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
                     let sole_field_ty = sole_field.ty(self.tcx, args).skip_norm_wip();
                     if self.may_coerce(expr_ty, sole_field_ty) {
-                        let variant_path =
-                            with_no_trimmed_paths!(self.tcx.def_path_str(variant.def_id));
+                        let variant_path = with_types_for_suggestion!(with_no_trimmed_paths!(
+                            self.tcx.def_path_str(variant.def_id)
+                        ));
                         // FIXME #56861: DRYer prelude filtering
                         if let Some(path) = variant_path.strip_prefix("std::prelude::")
                             && let Some((_, path)) = path.split_once("::")

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -1198,15 +1198,6 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateVariantMemberType(
       fromRust(Flags), unwrapDI<DIType>(Ty)));
 }
 
-extern "C" LLVMMetadataRef
-LLVMRustDIBuilderCreateEnumerator(LLVMDIBuilderRef Builder, const char *Name,
-                                  size_t NameLen, const uint64_t Value[2],
-                                  unsigned SizeInBits, bool IsUnsigned) {
-  return wrap(unwrap(Builder)->createEnumerator(
-      StringRef(Name, NameLen),
-      APSInt(APInt(SizeInBits, ArrayRef<uint64_t>(Value, 2)), IsUnsigned)));
-}
-
 extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateEnumerationType(
     LLVMDIBuilderRef Builder, LLVMMetadataRef Scope, const char *Name,
     size_t NameLen, LLVMMetadataRef File, unsigned LineNumber,

compiler/rustc_target/src/spec/targets/xtensa_esp32_espidf.rs

@@ -7,7 +7,7 @@ pub(crate) fn target() -> Target {
     Target {
         llvm_target: "xtensa-none-elf".into(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-v1:8:8-i64:64-i128:128-n32".into(),
+        data_layout: "e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32".into(),
         arch: Arch::Xtensa,
         metadata: TargetMetadata { description: None, tier: Some(3), host_tools: None, std: None },
 

compiler/rustc_target/src/spec/targets/xtensa_esp32_none_elf.rs

@@ -5,7 +5,7 @@ pub(crate) fn target() -> Target {
     Target {
         llvm_target: "xtensa-none-elf".into(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-v1:8:8-i64:64-i128:128-n32".into(),
+        data_layout: "e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32".into(),
         arch: Arch::Xtensa,
         metadata: TargetMetadata {
             description: Some("Xtensa ESP32".into()),

compiler/rustc_target/src/spec/targets/xtensa_esp32s2_espidf.rs

@@ -7,7 +7,7 @@ pub(crate) fn target() -> Target {
     Target {
         llvm_target: "xtensa-none-elf".into(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-v1:8:8-i64:64-i128:128-n32".into(),
+        data_layout: "e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32".into(),
         arch: Arch::Xtensa,
         metadata: TargetMetadata { description: None, tier: Some(3), host_tools: None, std: None },
 

compiler/rustc_target/src/spec/targets/xtensa_esp32s2_none_elf.rs

@@ -5,7 +5,7 @@ pub(crate) fn target() -> Target {
     Target {
         llvm_target: "xtensa-none-elf".into(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-v1:8:8-i64:64-i128:128-n32".into(),
+        data_layout: "e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32".into(),
         arch: Arch::Xtensa,
         metadata: TargetMetadata {
             description: Some("Xtensa ESP32-S2".into()),

compiler/rustc_target/src/spec/targets/xtensa_esp32s3_espidf.rs

@@ -7,7 +7,7 @@ pub(crate) fn target() -> Target {
     Target {
         llvm_target: "xtensa-none-elf".into(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-v1:8:8-i64:64-i128:128-n32".into(),
+        data_layout: "e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32".into(),
         arch: Arch::Xtensa,
         metadata: TargetMetadata { description: None, tier: Some(3), host_tools: None, std: None },
 

compiler/rustc_target/src/spec/targets/xtensa_esp32s3_none_elf.rs

@@ -5,7 +5,7 @@ pub(crate) fn target() -> Target {
     Target {
         llvm_target: "xtensa-none-elf".into(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-v1:8:8-i64:64-i128:128-n32".into(),
+        data_layout: "e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32".into(),
         arch: Arch::Xtensa,
         metadata: TargetMetadata {
             description: Some("Xtensa ESP32-S3".into()),

library/std/src/fs.rs

@@ -815,18 +815,17 @@ impl File {
 
     /// Acquire an exclusive lock on the file. Blocks until the lock can be acquired.
     ///
-    /// This acquires an exclusive lock; no other file handle to this file, in this or any other
+    /// This acquires an exclusive lock. No *other* file handle to this file, in this or any other
     /// process, may acquire another lock.
+    /// If this file handle/descriptor, or a clone of it, already holds a lock, the exact behavior
+    /// is unspecified and platform dependent, including the possibility that it will deadlock.
+    /// However, if this method returns, then an exclusive lock is held.
     ///
     /// This lock may be advisory or mandatory. This lock is meant to interact with [`lock`],
     /// [`try_lock`], [`lock_shared`], [`try_lock_shared`], and [`unlock`]. Its interactions with
     /// other methods, such as [`read`] and [`write`] are platform specific, and it may or may not
     /// cause non-lockholders to block.
     ///
-    /// If this file handle/descriptor, or a clone of it, already holds a lock the exact behavior
-    /// is unspecified and platform dependent, including the possibility that it will deadlock.
-    /// However, if this method returns, then an exclusive lock is held.
-    ///
     /// If the file is not open for writing, it is unspecified whether this function returns an error.
     ///
     /// The lock will be released when this file (along with any other file descriptors/handles
@@ -869,18 +868,18 @@ impl File {
 
     /// Acquire a shared (non-exclusive) lock on the file. Blocks until the lock can be acquired.
     ///
-    /// This acquires a shared lock; more than one file handle, in this or any other process, may
-    /// hold a shared lock, but none may hold an exclusive lock at the same time.
+    /// This acquires a shared lock. More than one file handle to this file, in this or any other
+    /// process, may hold a shared lock, but no *other* file handle may hold an exclusive lock at
+    /// the same time.
+    /// If this file handle/descriptor, or a clone of it, already holds a lock, the exact
+    /// behavior is unspecified and platform dependent, including the possibility that it will
+    /// deadlock. However, if this method returns, then a shared lock is held.
     ///
     /// This lock may be advisory or mandatory. This lock is meant to interact with [`lock`],
     /// [`try_lock`], [`lock_shared`], [`try_lock_shared`], and [`unlock`]. Its interactions with
     /// other methods, such as [`read`] and [`write`] are platform specific, and it may or may not
     /// cause non-lockholders to block.
     ///
-    /// If this file handle/descriptor, or a clone of it, already holds a lock, the exact behavior
-    /// is unspecified and platform dependent, including the possibility that it will deadlock.
-    /// However, if this method returns, then a shared lock is held.
-    ///
     /// The lock will be released when this file (along with any other file descriptors/handles
     /// duplicated or inherited from it) is closed, or if the [`unlock`] method is called.
     ///