Auto merge of #3894 - rust-lang:rustup-2024-09-17, r=RalfJung

Automatic Rustup

Author: bors

compiler/rustc_abi/src/layout.rs

@@ -26,7 +26,7 @@ mod layout;
 #[cfg(test)]
 mod tests;
 
-pub use layout::LayoutCalculator;
+pub use layout::{LayoutCalculator, LayoutCalculatorError};
 
 /// Requirements for a `StableHashingContext` to be used in this crate.
 /// This is a hack to allow using the `HashStable_Generic` derive macro
@@ -393,6 +393,14 @@ impl HasDataLayout for TargetDataLayout {
     }
 }
 
+// used by rust-analyzer
+impl HasDataLayout for &TargetDataLayout {
+    #[inline]
+    fn data_layout(&self) -> &TargetDataLayout {
+        (**self).data_layout()
+    }
+}
+
 /// Endianness of the target, which must match cfg(target-endian).
 #[derive(Copy, Clone, PartialEq, Eq)]
 pub enum Endian {

compiler/rustc_abi/src/lib.rs

@@ -2066,14 +2066,14 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
         };
     }
 
-    arith_red!(simd_reduce_add_ordered: vector_reduce_add, vector_reduce_fadd, true, add, 0.0);
+    arith_red!(simd_reduce_add_ordered: vector_reduce_add, vector_reduce_fadd, true, add, -0.0);
     arith_red!(simd_reduce_mul_ordered: vector_reduce_mul, vector_reduce_fmul, true, mul, 1.0);
     arith_red!(
         simd_reduce_add_unordered: vector_reduce_add,
         vector_reduce_fadd_reassoc,
         false,
         add,
-        0.0
+        -0.0
     );
     arith_red!(
         simd_reduce_mul_unordered: vector_reduce_mul,

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -7,7 +7,9 @@ use std::{env, iter, mem, str};
 
 use cc::windows_registry;
 use rustc_hir::def_id::{CrateNum, LOCAL_CRATE};
-use rustc_metadata::{find_native_static_library, try_find_native_static_library};
+use rustc_metadata::{
+    find_native_static_library, try_find_native_dynamic_library, try_find_native_static_library,
+};
 use rustc_middle::bug;
 use rustc_middle::middle::dependency_format::Linkage;
 use rustc_middle::middle::exported_symbols;
@@ -876,7 +878,13 @@ impl<'a> Linker for MsvcLinker<'a> {
     }
 
     fn link_dylib_by_name(&mut self, name: &str, verbatim: bool, _as_needed: bool) {
-        self.link_arg(format!("{}{}", name, if verbatim { "" } else { ".lib" }));
+        // On MSVC-like targets rustc supports import libraries using alternative naming
+        // scheme (`libfoo.a`) unsupported by linker, search for such libraries manually.
+        if let Some(path) = try_find_native_dynamic_library(self.sess, name, verbatim) {
+            self.link_arg(path);
+        } else {
+            self.link_arg(format!("{}{}", name, if verbatim { "" } else { ".lib" }));
+        }
     }
 
     fn link_dylib_by_path(&mut self, path: &Path, _as_needed: bool) {

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -319,7 +319,7 @@ pub fn valtree_to_const_value<'tcx>(
                 let branches = valtree.unwrap_branch();
                 // Find the non-ZST field. (There can be aligned ZST!)
                 for (i, &inner_valtree) in branches.iter().enumerate() {
-                    let field = layout.field(&LayoutCx { tcx, param_env }, i);
+                    let field = layout.field(&LayoutCx::new(tcx, param_env), i);
                     if !field.is_zst() {
                         return valtree_to_const_value(tcx, param_env.and(field.ty), inner_valtree);
                     }

compiler/rustc_const_eval/src/const_eval/valtrees.rs

@@ -21,7 +21,7 @@ use rustc_middle::mir::interpret::{
     UnsupportedOpInfo, ValidationErrorInfo,
 };
 use rustc_middle::ty::layout::{LayoutCx, LayoutOf, TyAndLayout};
-use rustc_middle::ty::{self, Ty, TyCtxt};
+use rustc_middle::ty::{self, Ty};
 use rustc_span::symbol::{sym, Symbol};
 use rustc_target::abi::{
     Abi, FieldIdx, FieldsShape, Scalar as ScalarAbi, Size, VariantIdx, Variants, WrappingRange,
@@ -940,7 +940,7 @@ impl<'rt, 'tcx, M: Machine<'tcx>> ValidityVisitor<'rt, 'tcx, M> {
     ) -> Cow<'e, RangeSet> {
         assert!(layout.ty.is_union());
         assert!(layout.abi.is_sized(), "there are no unsized unions");
-        let layout_cx = LayoutCx { tcx: *ecx.tcx, param_env: ecx.param_env };
+        let layout_cx = LayoutCx::new(*ecx.tcx, ecx.param_env);
         return M::cached_union_data_range(ecx, layout.ty, || {
             let mut out = RangeSet(Vec::new());
             union_data_range_uncached(&layout_cx, layout, Size::ZERO, &mut out);
@@ -949,7 +949,7 @@ impl<'rt, 'tcx, M: Machine<'tcx>> ValidityVisitor<'rt, 'tcx, M> {
 
         /// Helper for recursive traversal: add data ranges of the given type to `out`.
         fn union_data_range_uncached<'tcx>(
-            cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: &LayoutCx<'tcx>,
             layout: TyAndLayout<'tcx>,
             base_offset: Size,
             out: &mut RangeSet,

compiler/rustc_const_eval/src/interpret/validity.rs

@@ -1,5 +1,7 @@
 use rustc_middle::bug;
-use rustc_middle::ty::layout::{LayoutCx, LayoutError, LayoutOf, TyAndLayout, ValidityRequirement};
+use rustc_middle::ty::layout::{
+    HasTyCtxt, LayoutCx, LayoutError, LayoutOf, TyAndLayout, ValidityRequirement,
+};
 use rustc_middle::ty::{ParamEnvAnd, Ty, TyCtxt};
 use rustc_target::abi::{Abi, FieldsShape, Scalar, Variants};
 
@@ -30,7 +32,7 @@ pub fn check_validity_requirement<'tcx>(
         return Ok(!layout.abi.is_uninhabited());
     }
 
-    let layout_cx = LayoutCx { tcx, param_env: param_env_and_ty.param_env };
+    let layout_cx = LayoutCx::new(tcx, param_env_and_ty.param_env);
     if kind == ValidityRequirement::Uninit || tcx.sess.opts.unstable_opts.strict_init_checks {
         check_validity_requirement_strict(layout, &layout_cx, kind)
     } else {
@@ -42,12 +44,12 @@ pub fn check_validity_requirement<'tcx>(
 /// for details.
 fn check_validity_requirement_strict<'tcx>(
     ty: TyAndLayout<'tcx>,
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     kind: ValidityRequirement,
 ) -> Result<bool, &'tcx LayoutError<'tcx>> {
     let machine = CompileTimeMachine::new(CanAccessMutGlobal::No, CheckAlignment::Error);
 
-    let mut cx = InterpCx::new(cx.tcx, rustc_span::DUMMY_SP, cx.param_env, machine);
+    let mut cx = InterpCx::new(cx.tcx(), rustc_span::DUMMY_SP, cx.param_env, machine);
 
     let allocated = cx
         .allocate(ty, MemoryKind::Machine(crate::const_eval::MemoryKind::Heap))
@@ -80,7 +82,7 @@ fn check_validity_requirement_strict<'tcx>(
 /// function for details.
 fn check_validity_requirement_lax<'tcx>(
     this: TyAndLayout<'tcx>,
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     init_kind: ValidityRequirement,
 ) -> Result<bool, &'tcx LayoutError<'tcx>> {
     let scalar_allows_raw_init = move |s: Scalar| -> bool {

compiler/rustc_const_eval/src/util/check_validity_requirement.rs

@@ -0,0 +1,19 @@
+Something other than a type or const parameter has been used when one was
+expected.
+
+Erroneous code example:
+
+```compile_fail,E0799
+fn bad1() -> impl Sized + use<main> {}
+
+fn bad2(x: ()) -> impl Sized + use<x> {}
+
+fn main() {}
+```
+
+In the given examples, for `bad1`, the name `main` corresponds to a function
+rather than a type or const parameter. In `bad2`, the name `x` corresponds to
+a function argument rather than a type or const parameter.
+
+Only type and const parameters, including `Self`, may be captured by
+`use<...>` precise capturing bounds.

compiler/rustc_error_codes/src/error_codes/E0799.md

@@ -0,0 +1,11 @@
+A type or const parameter of the given name is not in scope.
+
+Erroneous code examples:
+
+```compile_fail,E0800
+fn missing() -> impl Sized + use<T> {}
+```
+
+To fix this error, please verify you didn't misspell the type or const
+parameter, or double-check if you forgot to declare the parameter in
+the list of generics.

compiler/rustc_error_codes/src/error_codes/E0800.md

@@ -538,6 +538,8 @@ E0795: 0795,
 E0796: 0796,
 E0797: 0797,
 E0798: 0798,
+E0799: 0799,
+E0800: 0800,
         );
     )
 }