Auto merge of #139997 - matthiaskrgr:rollup-a1fe5zg, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #137881 (Add `copy_within` to `IndexSlice`)
 - #138599 (avoid overflow when generating debuginfo for expanding recursive types)
 - #139934 (Update `compiler-builtins` to 0.1.155)
 - #139976 (run-make: drop `os_pipe` workaround now that `anonymous_pipe` is stable on beta)
 - #139989 (tests: adjust 101082 test for LLVM 21 fix)
 - #139991 (remove stray file)

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

Cargo.lock

@@ -2572,16 +2572,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
-[[package]]
-name = "os_pipe"
-version = "1.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ffd2b0a5634335b135d5728d84c5e0fd726954b87111f7506a61c502280d982"
-dependencies = [
- "libc",
- "windows-sys 0.59.0",
-]
-
 [[package]]
 name = "overload"
 version = "0.1.1"
@@ -3142,7 +3132,6 @@ dependencies = [
  "gimli 0.31.1",
  "libc",
  "object 0.36.7",
- "os_pipe",
  "regex",
  "serde_json",
  "similar",

compiler/rustc_codegen_llvm/src/debuginfo/metadata/type_map.rs

@@ -247,6 +247,16 @@ pub(super) fn stub<'ll, 'tcx>(
     StubInfo { metadata, unique_type_id }
 }
 
+struct AdtStackPopGuard<'ll, 'tcx, 'a> {
+    cx: &'a CodegenCx<'ll, 'tcx>,
+}
+
+impl<'ll, 'tcx, 'a> Drop for AdtStackPopGuard<'ll, 'tcx, 'a> {
+    fn drop(&mut self) {
+        debug_context(self.cx).adt_stack.borrow_mut().pop();
+    }
+}
+
 /// This function enables creating debuginfo nodes that can recursively refer to themselves.
 /// It will first insert the given stub into the type map and only then execute the `members`
 /// and `generics` closures passed in. These closures have access to the stub so they can
@@ -261,6 +271,44 @@ pub(super) fn build_type_with_children<'ll, 'tcx>(
 ) -> DINodeCreationResult<'ll> {
     assert_eq!(debug_context(cx).type_map.di_node_for_unique_id(stub_info.unique_type_id), None);
 
+    let mut _adt_stack_pop_guard = None;
+    if let UniqueTypeId::Ty(ty, ..) = stub_info.unique_type_id
+        && let ty::Adt(adt_def, args) = ty.kind()
+    {
+        let def_id = adt_def.did();
+        // If any sub type reference the original type definition and the sub type has a type
+        // parameter that strictly contains the original parameter, the original type is a recursive
+        // type that can expanding indefinitely. Example,
+        // ```
+        // enum Recursive<T> {
+        //     Recurse(*const Recursive<Wrap<T>>),
+        //     Item(T),
+        // }
+        // ```
+        let is_expanding_recursive =
+            debug_context(cx).adt_stack.borrow().iter().any(|(parent_def_id, parent_args)| {
+                if def_id == *parent_def_id {
+                    args.iter().zip(parent_args.iter()).any(|(arg, parent_arg)| {
+                        if let (Some(arg), Some(parent_arg)) = (arg.as_type(), parent_arg.as_type())
+                        {
+                            arg != parent_arg && arg.contains(parent_arg)
+                        } else {
+                            false
+                        }
+                    })
+                } else {
+                    false
+                }
+            });
+        if is_expanding_recursive {
+            // FIXME: indicate that this is an expanding recursive type in stub metadata?
+            return DINodeCreationResult::new(stub_info.metadata, false);
+        } else {
+            debug_context(cx).adt_stack.borrow_mut().push((def_id, args));
+            _adt_stack_pop_guard = Some(AdtStackPopGuard { cx });
+        }
+    }
+
     debug_context(cx).type_map.insert(stub_info.unique_type_id, stub_info.metadata);
 
     let members: SmallVec<_> =

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -66,6 +66,7 @@ pub(crate) struct CodegenUnitDebugContext<'ll, 'tcx> {
     created_files: RefCell<UnordMap<Option<(StableSourceFileId, SourceFileHash)>, &'ll DIFile>>,
 
     type_map: metadata::TypeMap<'ll, 'tcx>,
+    adt_stack: RefCell<Vec<(DefId, GenericArgsRef<'tcx>)>>,
     namespace_map: RefCell<DefIdMap<&'ll DIScope>>,
     recursion_marker_type: OnceCell<&'ll DIType>,
 }
@@ -80,6 +81,7 @@ impl<'ll, 'tcx> CodegenUnitDebugContext<'ll, 'tcx> {
             builder,
             created_files: Default::default(),
             type_map: Default::default(),
+            adt_stack: Default::default(),
             namespace_map: RefCell::new(Default::default()),
             recursion_marker_type: OnceCell::new(),
         }

compiler/rustc_index/src/slice.rs

@@ -1,6 +1,6 @@
 use std::fmt;
 use std::marker::PhantomData;
-use std::ops::{Index, IndexMut};
+use std::ops::{Index, IndexMut, RangeBounds};
 use std::slice::GetDisjointMutError::*;
 use std::slice::{self, SliceIndex};
 
@@ -104,6 +104,17 @@ impl<I: Idx, T> IndexSlice<I, T> {
         self.raw.swap(a.index(), b.index())
     }
 
+    #[inline]
+    pub fn copy_within(
+        &mut self,
+        src: impl IntoSliceIdx<I, [T], Output: RangeBounds<usize>>,
+        dest: I,
+    ) where
+        T: Copy,
+    {
+        self.raw.copy_within(src.into_slice_idx(), dest.index());
+    }
+
     #[inline]
     pub fn get<R: IntoSliceIdx<I, [T]>>(
         &self,

library/Cargo.lock

@@ -67,9 +67,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.153"
+version = "0.1.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "926ef6a360c15a911023352fd6969c51605d70495406f735beb1ca0257448e59"
+checksum = "341e0830ca6170a4fcf02e92e57daf4b6f10142d48da32a547023867a6c8b35e"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",

library/alloc/Cargo.toml

@@ -16,7 +16,7 @@ bench = false
 
 [dependencies]
 core = { path = "../core", public = true }
-compiler_builtins = { version = "=0.1.153", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.155", features = ['rustc-dep-of-std'] }
 
 [features]
 compiler-builtins-mem = ['compiler_builtins/mem']

library/std/Cargo.toml

@@ -18,7 +18,7 @@ cfg-if = { version = "1.0", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core", public = true }
-compiler_builtins = { version = "=0.1.153" }
+compiler_builtins = { version = "=0.1.155" }
 unwind = { path = "../unwind" }
 hashbrown = { version = "0.15", default-features = false, features = [
     'rustc-dep-of-std',

src/tools/run-make-support/Cargo.toml

@@ -14,9 +14,5 @@ build_helper = { path = "../../build_helper" }
 serde_json = "1.0"
 libc = "0.2"
 
-# FIXME(#137532): replace `os_pipe` with `anonymous_pipe` once it stabilizes and
-# reaches beta.
-os_pipe = "1.2.1"
-
 [lib]
 crate-type = ["lib", "dylib"]

src/tools/run-make-support/src/lib.rs

@@ -41,8 +41,6 @@ pub use bstr;
 pub use gimli;
 pub use libc;
 pub use object;
-// FIXME(#137532): replace with std `anonymous_pipe` once it stabilizes and reaches beta.
-pub use os_pipe;
 pub use regex;
 pub use serde_json;
 pub use similar;

tests/codegen/issues/issue-101082.rs

@@ -12,6 +12,7 @@
 // at the time still sometimes fails, so only verify it for the power-of-two size
 // - https://github.com/llvm/llvm-project/issues/134735
 //@[x86-64-v3] only-x86_64
+//@[x86-64-v3] min-llvm-version: 21
 //@[x86-64-v3] compile-flags: -Ctarget-cpu=x86-64-v3
 
 #![crate_type = "lib"]
@@ -19,16 +20,7 @@
 #[no_mangle]
 pub fn test() -> usize {
     // CHECK-LABEL: @test(
-    // host: ret {{i64|i32}} 165
-    // x86-64: ret {{i64|i32}} 165
-
-    // FIXME: Now that this autovectorizes via a masked load, it doesn't actually
-    // const-fold for certain widths.  The `test_eight` case below shows that, yes,
-    // what we're emitting *can* be const-folded, except that the way LLVM does it
-    // for certain widths doesn't today.  We should be able to put this back to
-    // the same check after <https://github.com/llvm/llvm-project/issues/134513>
-    // x86-64-v3: masked.load
-
+    // CHECK: ret {{i64|i32}} 165
     let values = [23, 16, 54, 3, 60, 9];
     let mut acc = 0;
     for item in values {

tests/crashes/100618.rs

@@ -1,12 +0,0 @@
-//@ known-bug: #100618
-//@ compile-flags: -Cdebuginfo=2
-
-//@ only-x86_64
-enum Foo<T: 'static> {
-    Value(T),
-    Recursive(&'static Foo<Option<T>>),
-}
-
-fn main() {
-    let _x = Foo::Value(());
-}

tests/crashes/115994.rs

@@ -1,17 +0,0 @@
-//@ known-bug: #115994
-//@ compile-flags: -Cdebuginfo=2 --crate-type lib
-
-// To prevent "overflow while adding drop-check rules".
-use std::mem::ManuallyDrop;
-
-pub enum Foo<U> {
-    Leaf(U),
-
-    Branch(BoxedFoo<BoxedFoo<U>>),
-}
-
-pub type BoxedFoo<U> = ManuallyDrop<Box<Foo<U>>>;
-
-pub fn test() -> Foo<usize> {
-    todo!()
-}

tests/crashes/121538.rs

@@ -1,30 +0,0 @@
-//@ known-bug: #121538
-//@ compile-flags: -Cdebuginfo=2
-
-use std::marker::PhantomData;
-
-struct Digit<T> {
-    elem: T
-}
-
-struct Node<T:'static> { m: PhantomData<&'static T> }
-
-enum FingerTree<T:'static> {
-    Single(T),
-
-    Deep(
-        Digit<T>,
-        Node<FingerTree<Node<T>>>,
-        )
-}
-
-enum Wrapper<T:'static> {
-    Simple,
-    Other(FingerTree<T>),
-}
-
-fn main() {
-    let w =
-        Some(Wrapper::Simple::<u32>);
-
-}

tests/debuginfo/recursive-enum.rs

@@ -4,7 +4,7 @@
 // gdb-command:run
 
 // Test whether compiling a recursive enum definition crashes debug info generation. The test case
-// is taken from issue #11083.
+// is taken from issue #11083 and #135093.
 
 #![allow(unused_variables)]
 #![feature(omit_gdb_pretty_printer_section)]
@@ -18,6 +18,21 @@ struct WindowCallbacks<'a> {
     pos_callback: Option<Box<FnMut(&Window, i32, i32) + 'a>>,
 }
 
+enum ExpandingRecursive<T> {
+    Recurse(Indirect<T>),
+    Item(T),
+}
+
+struct Indirect<U> {
+    rec: *const ExpandingRecursive<Option<U>>,
+}
+
+
 fn main() {
     let x = WindowCallbacks { pos_callback: None };
+
+    // EXPANDING RECURSIVE
+    let expanding_recursive: ExpandingRecursive<u64> = ExpandingRecursive::Recurse(Indirect {
+        rec: &ExpandingRecursive::Item(Option::Some(42)),
+    });
 }

tests/debuginfo/recursive-type-with-gat.rs

@@ -1,4 +1,3 @@
-//@ known-bug: #107362
 //@ compile-flags: -Cdebuginfo=2
 
 pub trait Functor

tests/run-make/broken-pipe-no-ice/rmake.rs

@@ -14,9 +14,7 @@
 use std::io::Read;
 use std::process::{Command, Stdio};
 
-// FIXME(#137532): replace `os_pipe` dependency with std `anonymous_pipe` once that stabilizes and
-// reaches beta.
-use run_make_support::{env_var, os_pipe};
+use run_make_support::env_var;
 
 #[derive(Debug, PartialEq)]
 enum Binary {
@@ -25,7 +23,7 @@ enum Binary {
 }
 
 fn check_broken_pipe_handled_gracefully(bin: Binary, mut cmd: Command) {
-    let (reader, writer) = os_pipe::pipe().unwrap();
+    let (reader, writer) = std::io::pipe().unwrap();
     drop(reader); // close read-end
     cmd.stdout(writer).stderr(Stdio::piped());