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-rw-r--r--compiler/rustc_const_eval/src/interpret/place.rs44
-rw-r--r--compiler/rustc_const_eval/src/util/caller_location.rs9
-rw-r--r--compiler/rustc_lexer/src/lib.rs1
-rw-r--r--compiler/rustc_middle/src/ty/context.rs2
-rw-r--r--compiler/rustc_mir_transform/src/dataflow_const_prop.rs9
-rw-r--r--compiler/rustc_parse/src/lexer/mod.rs2
-rw-r--r--compiler/rustc_parse/src/lib.rs1
7 files changed, 31 insertions, 37 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/place.rs b/compiler/rustc_const_eval/src/interpret/place.rs
index f54a932e1b6..810e9356b26 100644
--- a/compiler/rustc_const_eval/src/interpret/place.rs
+++ b/compiler/rustc_const_eval/src/interpret/place.rs
@@ -5,8 +5,7 @@
 use std::assert_matches::assert_matches;
 
 use either::{Either, Left, Right};
-use rustc_abi::{Align, BackendRepr, HasDataLayout, Size};
-use rustc_ast::Mutability;
+use rustc_abi::{BackendRepr, HasDataLayout, Size};
 use rustc_middle::ty::Ty;
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::{bug, mir, span_bug};
@@ -1018,40 +1017,31 @@ where
         self.allocate_dyn(layout, kind, MemPlaceMeta::None)
     }
 
-    /// Allocates a sequence of bytes in the interpreter's memory.
-    /// For immutable allocations, uses deduplication to reuse existing memory.
-    /// For mutable allocations, creates a new unique allocation.
-    pub fn allocate_bytes(
+    /// Allocates a sequence of bytes in the interpreter's memory with alignment 1.
+    /// This is allocated in immutable global memory and deduplicated.
+    pub fn allocate_bytes_dedup(
         &mut self,
         bytes: &[u8],
-        align: Align,
-        kind: MemoryKind<M::MemoryKind>,
-        mutbl: Mutability,
     ) -> InterpResult<'tcx, Pointer<M::Provenance>> {
-        // Use cache for immutable strings.
-        if mutbl.is_not() {
-            // Use dedup'd allocation function.
-            let salt = M::get_global_alloc_salt(self, None);
-            let id = self.tcx.allocate_bytes_dedup(bytes, salt);
-
-            // Turn untagged "global" pointers (obtained via `tcx`) into the machine pointer to the allocation.
-            M::adjust_alloc_root_pointer(&self, Pointer::from(id), Some(kind))
-        } else {
-            // Allocate new memory for mutable data.
-            self.allocate_bytes_ptr(bytes, align, kind, mutbl)
-        }
+        let salt = M::get_global_alloc_salt(self, None);
+        let id = self.tcx.allocate_bytes_dedup(bytes, salt);
+
+        // Turn untagged "global" pointers (obtained via `tcx`) into the machine pointer to the allocation.
+        M::adjust_alloc_root_pointer(
+            &self,
+            Pointer::from(id),
+            M::GLOBAL_KIND.map(MemoryKind::Machine),
+        )
     }
 
-    /// Allocates a string in the interpreter's memory with metadata for length.
-    /// Uses `allocate_bytes` internally but adds string-specific metadata handling.
-    pub fn allocate_str(
+    /// Allocates a string in the interpreter's memory, returning it as a (wide) place.
+    /// This is allocated in immutable global memory and deduplicated.
+    pub fn allocate_str_dedup(
         &mut self,
         str: &str,
-        kind: MemoryKind<M::MemoryKind>,
-        mutbl: Mutability,
     ) -> InterpResult<'tcx, MPlaceTy<'tcx, M::Provenance>> {
         let bytes = str.as_bytes();
-        let ptr = self.allocate_bytes(bytes, Align::ONE, kind, mutbl)?;
+        let ptr = self.allocate_bytes_dedup(bytes)?;
 
         // Create length metadata for the string.
         let meta = Scalar::from_target_usize(u64::try_from(bytes.len()).unwrap(), self);
diff --git a/compiler/rustc_const_eval/src/util/caller_location.rs b/compiler/rustc_const_eval/src/util/caller_location.rs
index 9bf16d4fe16..6593547cd23 100644
--- a/compiler/rustc_const_eval/src/util/caller_location.rs
+++ b/compiler/rustc_const_eval/src/util/caller_location.rs
@@ -1,7 +1,7 @@
 use rustc_hir::LangItem;
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::ty::layout::LayoutOf;
-use rustc_middle::ty::{self, Mutability};
+use rustc_middle::ty::{self};
 use rustc_middle::{bug, mir};
 use rustc_span::symbol::Symbol;
 use tracing::trace;
@@ -20,12 +20,9 @@ fn alloc_caller_location<'tcx>(
     // This can fail if rustc runs out of memory right here. Trying to emit an error would be
     // pointless, since that would require allocating more memory than these short strings.
     let file = if loc_details.file {
-        ecx.allocate_str(filename.as_str(), MemoryKind::CallerLocation, Mutability::Not).unwrap()
+        ecx.allocate_str_dedup(filename.as_str()).unwrap()
     } else {
-        // FIXME: This creates a new allocation each time. It might be preferable to
-        // perform this allocation only once, and re-use the `MPlaceTy`.
-        // See https://github.com/rust-lang/rust/pull/89920#discussion_r730012398
-        ecx.allocate_str("<redacted>", MemoryKind::CallerLocation, Mutability::Not).unwrap()
+        ecx.allocate_str_dedup("<redacted>").unwrap()
     };
     let file = file.map_provenance(CtfeProvenance::as_immutable);
     let line = if loc_details.line { Scalar::from_u32(line) } else { Scalar::from_u32(0) };
diff --git a/compiler/rustc_lexer/src/lib.rs b/compiler/rustc_lexer/src/lib.rs
index 6caeec1b5cc..aa4abf678b9 100644
--- a/compiler/rustc_lexer/src/lib.rs
+++ b/compiler/rustc_lexer/src/lib.rs
@@ -33,6 +33,7 @@ pub mod unescape;
 mod tests;
 
 use unicode_properties::UnicodeEmoji;
+pub use unicode_xid::UNICODE_VERSION as UNICODE_XID_VERSION;
 
 use self::LiteralKind::*;
 use self::TokenKind::*;
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index d4835bb07f6..2841470d248 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -1479,7 +1479,7 @@ impl<'tcx> TyCtxt<'tcx> {
         self.mk_adt_def_from_data(ty::AdtDefData::new(self, did, kind, variants, repr))
     }
 
-    /// Allocates a read-only byte or string literal for `mir::interpret`.
+    /// Allocates a read-only byte or string literal for `mir::interpret` with alignment 1.
     /// Returns the same `AllocId` if called again with the same bytes.
     pub fn allocate_bytes_dedup(self, bytes: &[u8], salt: usize) -> interpret::AllocId {
         // Create an allocation that just contains these bytes.
diff --git a/compiler/rustc_mir_transform/src/dataflow_const_prop.rs b/compiler/rustc_mir_transform/src/dataflow_const_prop.rs
index d017202f48b..b94c925b1db 100644
--- a/compiler/rustc_mir_transform/src/dataflow_const_prop.rs
+++ b/compiler/rustc_mir_transform/src/dataflow_const_prop.rs
@@ -534,8 +534,13 @@ impl<'a, 'tcx> ConstAnalysis<'a, 'tcx> {
             // This allows the set of visited edges to grow monotonically with the lattice.
             FlatSet::Bottom => TerminatorEdges::None,
             FlatSet::Elem(scalar) => {
-                let choice = scalar.assert_scalar_int().to_bits_unchecked();
-                TerminatorEdges::Single(targets.target_for_value(choice))
+                if let Ok(scalar_int) = scalar.try_to_scalar_int() {
+                    TerminatorEdges::Single(
+                        targets.target_for_value(scalar_int.to_bits_unchecked()),
+                    )
+                } else {
+                    TerminatorEdges::SwitchInt { discr, targets }
+                }
             }
             FlatSet::Top => TerminatorEdges::SwitchInt { discr, targets },
         }
diff --git a/compiler/rustc_parse/src/lexer/mod.rs b/compiler/rustc_parse/src/lexer/mod.rs
index d97f05dc7eb..2426eb81678 100644
--- a/compiler/rustc_parse/src/lexer/mod.rs
+++ b/compiler/rustc_parse/src/lexer/mod.rs
@@ -822,7 +822,7 @@ impl<'psess, 'src> Lexer<'psess, 'src> {
 
     /// Detect guarded string literal syntax
     ///
-    /// RFC 3598 reserved this syntax for future use. As of Rust 2024,
+    /// RFC 3593 reserved this syntax for future use. As of Rust 2024,
     /// using this syntax produces an error. In earlier editions, however, it
     /// only results in an (allowed by default) lint, and is treated as
     /// separate tokens.
diff --git a/compiler/rustc_parse/src/lib.rs b/compiler/rustc_parse/src/lib.rs
index 2792050a0b3..f963a424a7f 100644
--- a/compiler/rustc_parse/src/lib.rs
+++ b/compiler/rustc_parse/src/lib.rs
@@ -24,6 +24,7 @@ use rustc_data_structures::sync::Lrc;
 use rustc_errors::{Diag, FatalError, PResult};
 use rustc_session::parse::ParseSess;
 use rustc_span::{FileName, SourceFile, Span};
+pub use unicode_normalization::UNICODE_VERSION as UNICODE_NORMALIZATION_VERSION;
 
 pub const MACRO_ARGUMENTS: Option<&str> = Some("macro arguments");
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2025-10-27 13:04:15 +0000