Auto merge of #82851 - JohnTitor:rollup-me5ko8g, r=JohnTitor

Rollup of 13 pull requests

Successful merges:

 - #77916 (Change built-in kernel targets to be os = none throughout)
 - #82130 (Make some Option, Result methods unstably const)
 - #82292 (Prevent specialized ZipImpl from calling `__iterator_get_unchecked` twice with the same index)
 - #82402 (Remove RefCell around `module_trait_cache`)
 - #82592 (Improve transmute docs with further clarifications)
 - #82651 (Cleanup rustdoc warnings)
 - #82720 (Fix diagnostic suggests adding type `[type error]`)
 - #82751 (improve offset_from docs)
 - #82793 (Move some tests to more suitable subdirs)
 - #82803 (rustdoc: Add an unstable option to print all unversioned files)
 - #82808 (Sync rustc_codegen_cranelift)
 - #82822 (Fix typo)
 - #82837 (tweak MaybeUninit docs)

Failed merges:

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

Author: bors

compiler/rustc/src/main.rs

@@ -4,7 +4,7 @@ fn main() {
     // Note that we're pulling in a static copy of jemalloc which means that to
     // pull it in we need to actually reference its symbols for it to get
     // linked. The two crates we link to here, std and rustc_driver, are both
-    // dynamic libraries. That means to pull in jemalloc we need to actually
+    // dynamic libraries. That means to pull in jemalloc we actually need to
     // reference allocation symbols one way or another (as this file is the only
     // object code in the rustc executable).
     #[cfg(feature = "jemalloc-sys")]

compiler/rustc_codegen_cranelift/.cirrus.yml

@@ -0,0 +1,25 @@
+task:
+  name: freebsd
+  freebsd_instance:
+    image: freebsd-12-1-release-amd64
+  setup_rust_script:
+    - pkg install -y curl git bash
+    - curl https://sh.rustup.rs -sSf --output rustup.sh
+    - sh rustup.sh --default-toolchain none -y --profile=minimal
+  cargo_bin_cache:
+    folder: ~/.cargo/bin
+  target_cache:
+    folder: target
+  prepare_script:
+    - . $HOME/.cargo/env
+    - git config --global user.email "user@example.com"
+    - git config --global user.name "User"
+    - ./prepare.sh
+  test_script:
+    - . $HOME/.cargo/env
+    - # Enable backtraces for easier debugging
+    - export RUST_BACKTRACE=1
+    - # Reduce amount of benchmark runs as they are slow
+    - export COMPILE_RUNS=2
+    - export RUN_RUNS=2
+    - ./test.sh