Auto merge of #77224 - RalfJung:rollup-hdvb96c, r=RalfJung

Rollup of 12 pull requests

Successful merges:

 - #75454 (Explicitly document the size guarantees that Option makes.)
 - #76631 (Add `x.py setup`)
 - #77076 (Add missing code examples on slice iter types)
 - #77093 (merge `need_type_info_err(_const)`)
 - #77122 (Add `#![feature(const_fn_floating_point_arithmetic)]`)
 - #77127 (Update mdBook)
 - #77161 (Remove TrustedLen requirement from BuilderMethods::switch)
 - #77166 (update Miri)
 - #77181 (Add doc alias for pointer primitive)
 - #77204 (Remove stray word from `ClosureKind::extends` docs)
 - #77207 (Rename `whence` to `span`)
 - #77211 (Remove unused #[allow(...)] statements from compiler/)

Failed merges:

 - #77170 (Remove `#[rustc_allow_const_fn_ptr]` and add `#![feature(const_fn_fn_ptr_basics)]`)

r? `@ghost`

3 files changed, 2 insertions, 6 deletions

diff --git a/compiler/rustc_codegen_ssa/src/common.rs b/compiler/rustc_codegen_ssa/src/common.rs
index e04ed531bbf..780b1d2cd94 100644
--- a/compiler/rustc_codegen_ssa/src/common.rs
+++ b/compiler/rustc_codegen_ssa/src/common.rs
@@ -1,4 +1,4 @@
-#![allow(non_camel_case_types, non_snake_case)]
+#![allow(non_camel_case_types)]
 
 use rustc_errors::struct_span_err;
 use rustc_hir as hir;
@@ -25,7 +25,6 @@ pub enum IntPredicate {
     IntSLE,
 }
 
-#[allow(dead_code)]
 pub enum RealPredicate {
     RealPredicateFalse,
     RealOEQ,
@@ -60,7 +59,6 @@ pub enum AtomicRmwBinOp {
 }
 
 pub enum AtomicOrdering {
-    #[allow(dead_code)]
     NotAtomic,
     Unordered,
     Monotonic,
diff --git a/compiler/rustc_codegen_ssa/src/lib.rs b/compiler/rustc_codegen_ssa/src/lib.rs
index 8568bd64f4c..d4f3bf37797 100644
--- a/compiler/rustc_codegen_ssa/src/lib.rs
+++ b/compiler/rustc_codegen_ssa/src/lib.rs
@@ -6,7 +6,6 @@
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
 #![feature(or_patterns)]
-#![feature(trusted_len)]
 #![feature(associated_type_bounds)]
 #![recursion_limit = "256"]
 
diff --git a/compiler/rustc_codegen_ssa/src/traits/builder.rs b/compiler/rustc_codegen_ssa/src/traits/builder.rs
index 5142922260a..b35b0f24208 100644
--- a/compiler/rustc_codegen_ssa/src/traits/builder.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/builder.rs
@@ -18,7 +18,6 @@ use rustc_middle::ty::Ty;
 use rustc_target::abi::{Abi, Align, Scalar, Size};
 use rustc_target::spec::HasTargetSpec;
 
-use std::iter::TrustedLen;
 use std::ops::Range;
 
 #[derive(Copy, Clone)]
@@ -60,7 +59,7 @@ pub trait BuilderMethods<'a, 'tcx>:
         &mut self,
         v: Self::Value,
         else_llbb: Self::BasicBlock,
-        cases: impl ExactSizeIterator<Item = (u128, Self::BasicBlock)> + TrustedLen,
+        cases: impl ExactSizeIterator<Item = (u128, Self::BasicBlock)>,
     );
     fn invoke(
         &mut self,