Auto merge of #129809 - matthiaskrgr:rollup-cyygnxh, r=matthiaskrgr

Rollup of 15 pull requests

Successful merges:

 - #120221 (Don't make statement nonterminals match pattern nonterminals)
 - #126183 (Separate core search logic with search ui)
 - #129123 (rustdoc-json: Add test for `Self` type)
 - #129366 (linker: Synchronize native library search in rustc and linker)
 - #129527 (Don't use `TyKind` in a lint)
 - #129534 (Deny `wasm_c_abi` lint to nudge the last 25%)
 - #129640 (Re-enable android tests/benches in alloc/core)
 - #129642 (Bump backtrace to 0.3.74~ish)
 - #129675 (allow BufReader::peek to be called on unsized types)
 - #129723 (Simplify some extern providers)
 - #129724 (Remove `Option<!>` return types.)
 - #129725 (Stop using `ty::GenericPredicates` for non-predicates_of queries)
 - #129731 (Allow running `./x.py test compiler`)
 - #129751 (interpret/visitor: make memory order iteration slightly more efficient)
 - #129754 (wasi: Fix sleeping for `Duration::MAX`)

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

src/helpers.rs

@@ -630,14 +630,11 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 self.ecx
             }
 
-            fn aggregate_field_order(memory_index: &IndexVec<FieldIdx, u32>, idx: usize) -> usize {
-                // We need to do an *inverse* lookup: find the field that has position `idx` in memory order.
-                for (src_field, &mem_pos) in memory_index.iter_enumerated() {
-                    if mem_pos as usize == idx {
-                        return src_field.as_usize();
-                    }
-                }
-                panic!("invalid `memory_index`, could not find {}-th field in memory order", idx);
+            fn aggregate_field_iter(
+                memory_index: &IndexVec<FieldIdx, u32>,
+            ) -> impl Iterator<Item = FieldIdx> + 'static {
+                let inverse_memory_index = memory_index.invert_bijective_mapping();
+                inverse_memory_index.into_iter()
             }
 
             // Hook to detect `UnsafeCell`.