Auto merge of #122182 - matthiaskrgr:rollup-gzimi4c, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #118623 (Improve std::fs::read_to_string example)
 - #119365 (Add asm goto support to `asm!`)
 - #120608 (Docs for std::ptr::slice_from_raw_parts)
 - #121832 (Add new Tier-3 target: `loongarch64-unknown-linux-musl`)
 - #121938 (Fix quadratic behavior of repeated vectored writes)
 - #122099 (Add  `#[inline]` to `BTreeMap::new` constructor)
 - #122103 (Make TAITs and ATPITs capture late-bound lifetimes in scope)
 - #122143 (PassWrapper: update for llvm/llvm-project@a3319371970b)

Failed merges:

 - #122076 (Tweak the way we protect in-place function arguments in interpreters)

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

1 files changed, 1 insertions, 9 deletions

diff --git a/compiler/rustc_hir_analysis/src/variance/mod.rs b/compiler/rustc_hir_analysis/src/variance/mod.rs
index 9618c6d8011..42885b0c832 100644
--- a/compiler/rustc_hir_analysis/src/variance/mod.rs
+++ b/compiler/rustc_hir_analysis/src/variance/mod.rs
@@ -125,15 +125,7 @@ fn variance_of_opaque(tcx: TyCtxt<'_>, item_def_id: LocalDefId) -> &[ty::Varianc
 
     // By default, RPIT are invariant wrt type and const generics, but they are bivariant wrt
     // lifetime generics.
-    let variances = std::iter::repeat(ty::Invariant).take(generics.count());
-
-    let mut variances: Vec<_> = match tcx.opaque_type_origin(item_def_id) {
-        rustc_hir::OpaqueTyOrigin::FnReturn(_) | rustc_hir::OpaqueTyOrigin::AsyncFn(_) => {
-            variances.collect()
-        }
-        // But TAIT are invariant for all generics
-        rustc_hir::OpaqueTyOrigin::TyAlias { .. } => return tcx.arena.alloc_from_iter(variances),
-    };
+    let mut variances = vec![ty::Invariant; generics.count()];
 
     // Mark all lifetimes from parent generics as unused (Bivariant).
     // This will be overridden later if required.