diff --git a/library/std/src/ffi/mod.rs b/library/std/src/ffi/mod.rs
index ee9f6ed087c..97e78d17786 100644
--- a/library/std/src/ffi/mod.rs
+++ b/library/std/src/ffi/mod.rs
@@ -132,8 +132,8 @@
 //! On all platforms, [`OsStr`] consists of a sequence of bytes that is encoded as a superset of
 //! UTF-8; see [`OsString`] for more details on its encoding on different platforms.
 //!
-//! For limited, inexpensive conversions from and to bytes, see [`OsStr::as_os_str_bytes`] and
-//! [`OsStr::from_os_str_bytes_unchecked`].
+//! For limited, inexpensive conversions from and to bytes, see [`OsStr::as_encoded_bytes`] and
+//! [`OsStr::from_encoded_bytes_unchecked`].
 //!
 //! [Unicode scalar value]: https://www.unicode.org/glossary/#unicode_scalar_value
 //! [Unicode code point]: https://www.unicode.org/glossary/#code_point
diff --git a/library/std/src/ffi/os_str.rs b/library/std/src/ffi/os_str.rs
index a09d5cf3cbf..93b9bf0cc20 100644
--- a/library/std/src/ffi/os_str.rs
+++ b/library/std/src/ffi/os_str.rs
@@ -154,11 +154,11 @@ impl OsString {
     /// # Safety
     ///
     /// As the encoding is unspecified, callers must pass in bytes that originated as a mixture of
-    /// validated UTF-8 and bytes from [`OsStr::as_os_str_bytes`] from within the same rust version
+    /// validated UTF-8 and bytes from [`OsStr::as_encoded_bytes`] from within the same rust version
     /// built for the same target platform.  For example, reconstructing an `OsString` from bytes sent
     /// over the network or stored in a file will likely violate these safety rules.
     ///
-    /// Due to the encoding being self-synchronizing, the bytes from [`OsStr::as_os_str_bytes`] can be
+    /// Due to the encoding being self-synchronizing, the bytes from [`OsStr::as_encoded_bytes`] can be
     /// split either immediately before or immediately after any valid non-empty UTF-8 substring.
     ///
     /// # Example
@@ -167,21 +167,21 @@ impl OsString {
     /// use std::ffi::OsStr;
     ///
     /// let os_str = OsStr::new("Mary had a little lamb");
-    /// let bytes = os_str.as_os_str_bytes();
+    /// let bytes = os_str.as_encoded_bytes();
     /// let words = bytes.split(|b| *b == b' ');
     /// let words: Vec<&OsStr> = words.map(|word| {
     ///     // SAFETY:
-    ///     // - Each `word` only contains content that originated from `OsStr::as_os_str_bytes`
+    ///     // - Each `word` only contains content that originated from `OsStr::as_encoded_bytes`
     ///     // - Only split with ASCII whitespace which is a non-empty UTF-8 substring
-    ///     unsafe { OsStr::from_os_str_bytes_unchecked(word) }
+    ///     unsafe { OsStr::from_encoded_bytes_unchecked(word) }
     /// }).collect();
     /// ```
     ///
     /// [conversions]: super#conversions
     #[inline]
     #[stable(feature = "os_str_bytes", since = "CURRENT_RUSTC_VERSION")]
-    pub unsafe fn from_os_str_bytes_unchecked(bytes: Vec<u8>) -> Self {
-        OsString { inner: Buf::from_os_str_bytes_unchecked(bytes) }
+    pub unsafe fn from_encoded_bytes_unchecked(bytes: Vec<u8>) -> Self {
+        OsString { inner: Buf::from_encoded_bytes_unchecked(bytes) }
     }
 
     /// Converts to an [`OsStr`] slice.
@@ -203,7 +203,7 @@ impl OsString {
     }
 
     /// Converts the `OsString` into a byte slice.  To convert the byte slice back into an
-    /// `OsString`, use the [`OsStr::from_os_str_bytes_unchecked`] function.
+    /// `OsString`, use the [`OsStr::from_encoded_bytes_unchecked`] function.
     ///
     /// The byte encoding is an unspecified, platform-specific, self-synchronizing superset of UTF-8.
     /// By being a self-synchronizing superset of UTF-8, this encoding is also a superset of 7-bit
@@ -218,8 +218,8 @@ impl OsString {
     /// [`std::ffi`]: crate::ffi
     #[inline]
     #[stable(feature = "os_str_bytes", since = "CURRENT_RUSTC_VERSION")]
-    pub fn into_os_str_bytes(self) -> Vec<u8> {
-        self.inner.into_os_str_bytes()
+    pub fn into_encoded_bytes(self) -> Vec<u8> {
+        self.inner.into_encoded_bytes()
     }
 
     /// Converts the `OsString` into a [`String`] if it contains valid Unicode data.
@@ -743,11 +743,11 @@ impl OsStr {
     /// # Safety
     ///
     /// As the encoding is unspecified, callers must pass in bytes that originated as a mixture of
-    /// validated UTF-8 and bytes from [`OsStr::as_os_str_bytes`] from within the same rust version
+    /// validated UTF-8 and bytes from [`OsStr::as_encoded_bytes`] from within the same rust version
     /// built for the same target platform.  For example, reconstructing an `OsStr` from bytes sent
     /// over the network or stored in a file will likely violate these safety rules.
     ///
-    /// Due to the encoding being self-synchronizing, the bytes from [`OsStr::as_os_str_bytes`] can be
+    /// Due to the encoding being self-synchronizing, the bytes from [`OsStr::as_encoded_bytes`] can be
     /// split either immediately before or immediately after any valid non-empty UTF-8 substring.
     ///
     /// # Example
@@ -756,21 +756,21 @@ impl OsStr {
     /// use std::ffi::OsStr;
     ///
     /// let os_str = OsStr::new("Mary had a little lamb");
-    /// let bytes = os_str.as_os_str_bytes();
+    /// let bytes = os_str.as_encoded_bytes();
     /// let words = bytes.split(|b| *b == b' ');
     /// let words: Vec<&OsStr> = words.map(|word| {
     ///     // SAFETY:
-    ///     // - Each `word` only contains content that originated from `OsStr::as_os_str_bytes`
+    ///     // - Each `word` only contains content that originated from `OsStr::as_encoded_bytes`
     ///     // - Only split with ASCII whitespace which is a non-empty UTF-8 substring
-    ///     unsafe { OsStr::from_os_str_bytes_unchecked(word) }
+    ///     unsafe { OsStr::from_encoded_bytes_unchecked(word) }
     /// }).collect();
     /// ```
     ///
     /// [conversions]: super#conversions
     #[inline]
     #[stable(feature = "os_str_bytes", since = "CURRENT_RUSTC_VERSION")]
-    pub unsafe fn from_os_str_bytes_unchecked(bytes: &[u8]) -> &Self {
-        Self::from_inner(Slice::from_os_str_bytes_unchecked(bytes))
+    pub unsafe fn from_encoded_bytes_unchecked(bytes: &[u8]) -> &Self {
+        Self::from_inner(Slice::from_encoded_bytes_unchecked(bytes))
     }
 
     #[inline]
@@ -944,7 +944,7 @@ impl OsStr {
     }
 
     /// Converts an OS string slice to a byte slice.  To convert the byte slice back into an OS
-    /// string slice, use the [`OsStr::from_os_str_bytes_unchecked`] function.
+    /// string slice, use the [`OsStr::from_encoded_bytes_unchecked`] function.
     ///
     /// The byte encoding is an unspecified, platform-specific, self-synchronizing superset of UTF-8.
     /// By being a self-synchronizing superset of UTF-8, this encoding is also a superset of 7-bit
@@ -959,8 +959,8 @@ impl OsStr {
     /// [`std::ffi`]: crate::ffi
     #[inline]
     #[stable(feature = "os_str_bytes", since = "CURRENT_RUSTC_VERSION")]
-    pub fn as_os_str_bytes(&self) -> &[u8] {
-        self.inner.as_os_str_bytes()
+    pub fn as_encoded_bytes(&self) -> &[u8] {
+        self.inner.as_encoded_bytes()
     }
 
     /// Converts this string to its ASCII lower case equivalent in-place.
@@ -1266,7 +1266,7 @@ impl Default for &OsStr {
 impl PartialEq for OsStr {
     #[inline]
     fn eq(&self, other: &OsStr) -> bool {
-        self.as_os_str_bytes().eq(other.as_os_str_bytes())
+        self.as_encoded_bytes().eq(other.as_encoded_bytes())
     }
 }
 
@@ -1293,23 +1293,23 @@ impl Eq for OsStr {}
 impl PartialOrd for OsStr {
     #[inline]
     fn partial_cmp(&self, other: &OsStr) -> Option<cmp::Ordering> {
-        self.as_os_str_bytes().partial_cmp(other.as_os_str_bytes())
+        self.as_encoded_bytes().partial_cmp(other.as_encoded_bytes())
     }
     #[inline]
     fn lt(&self, other: &OsStr) -> bool {
-        self.as_os_str_bytes().lt(other.as_os_str_bytes())
+        self.as_encoded_bytes().lt(other.as_encoded_bytes())
     }
     #[inline]
     fn le(&self, other: &OsStr) -> bool {
-        self.as_os_str_bytes().le(other.as_os_str_bytes())
+        self.as_encoded_bytes().le(other.as_encoded_bytes())
     }
     #[inline]
     fn gt(&self, other: &OsStr) -> bool {
-        self.as_os_str_bytes().gt(other.as_os_str_bytes())
+        self.as_encoded_bytes().gt(other.as_encoded_bytes())
     }
     #[inline]
     fn ge(&self, other: &OsStr) -> bool {
-        self.as_os_str_bytes().ge(other.as_os_str_bytes())
+        self.as_encoded_bytes().ge(other.as_encoded_bytes())
     }
 }
 
@@ -1328,7 +1328,7 @@ impl PartialOrd<str> for OsStr {
 impl Ord for OsStr {
     #[inline]
     fn cmp(&self, other: &OsStr) -> cmp::Ordering {
-        self.as_os_str_bytes().cmp(other.as_os_str_bytes())
+        self.as_encoded_bytes().cmp(other.as_encoded_bytes())
     }
 }
 
@@ -1378,7 +1378,7 @@ impl_cmp!(Cow<'a, OsStr>, OsString);
 impl Hash for OsStr {
     #[inline]
     fn hash<H: Hasher>(&self, state: &mut H) {
-        self.as_os_str_bytes().hash(state)
+        self.as_encoded_bytes().hash(state)
     }
 }
 
diff --git a/library/std/src/path.rs b/library/std/src/path.rs
index 5842c096f1a..60562f64c90 100644
--- a/library/std/src/path.rs
+++ b/library/std/src/path.rs
@@ -193,7 +193,7 @@ impl<'a> Prefix<'a> {
     fn len(&self) -> usize {
         use self::Prefix::*;
         fn os_str_len(s: &OsStr) -> usize {
-            s.as_os_str_bytes().len()
+            s.as_encoded_bytes().len()
         }
         match *self {
             Verbatim(x) => 4 + os_str_len(x),
@@ -316,7 +316,7 @@ fn has_physical_root(s: &[u8], prefix: Option<Prefix<'_>>) -> bool {
 
 // basic workhorse for splitting stem and extension
 fn rsplit_file_at_dot(file: &OsStr) -> (Option<&OsStr>, Option<&OsStr>) {
-    if file.as_os_str_bytes() == b".." {
+    if file.as_encoded_bytes() == b".." {
         return (Some(file), None);
     }
 
@@ -324,7 +324,7 @@ fn rsplit_file_at_dot(file: &OsStr) -> (Option<&OsStr>, Option<&OsStr>) {
     // and back. This is safe to do because (1) we only look at ASCII
     // contents of the encoding and (2) new &OsStr values are produced
     // only from ASCII-bounded slices of existing &OsStr values.
-    let mut iter = file.as_os_str_bytes().rsplitn(2, |b| *b == b'.');
+    let mut iter = file.as_encoded_bytes().rsplitn(2, |b| *b == b'.');
     let after = iter.next();
     let before = iter.next();
     if before == Some(b"") {
@@ -332,15 +332,15 @@ fn rsplit_file_at_dot(file: &OsStr) -> (Option<&OsStr>, Option<&OsStr>) {
     } else {
         unsafe {
             (
-                before.map(|s| OsStr::from_os_str_bytes_unchecked(s)),
-                after.map(|s| OsStr::from_os_str_bytes_unchecked(s)),
+                before.map(|s| OsStr::from_encoded_bytes_unchecked(s)),
+                after.map(|s| OsStr::from_encoded_bytes_unchecked(s)),
             )
         }
     }
 }
 
 fn split_file_at_dot(file: &OsStr) -> (&OsStr, Option<&OsStr>) {
-    let slice = file.as_os_str_bytes();
+    let slice = file.as_encoded_bytes();
     if slice == b".." {
         return (file, None);
     }
@@ -357,8 +357,8 @@ fn split_file_at_dot(file: &OsStr) -> (&OsStr, Option<&OsStr>) {
     let after = &slice[i + 1..];
     unsafe {
         (
-            OsStr::from_os_str_bytes_unchecked(before),
-            Some(OsStr::from_os_str_bytes_unchecked(after)),
+            OsStr::from_encoded_bytes_unchecked(before),
+            Some(OsStr::from_encoded_bytes_unchecked(after)),
         )
     }
 }
@@ -739,7 +739,7 @@ impl<'a> Components<'a> {
             // separately via `include_cur_dir`
             b".." => Some(Component::ParentDir),
             b"" => None,
-            _ => Some(Component::Normal(unsafe { OsStr::from_os_str_bytes_unchecked(comp) })),
+            _ => Some(Component::Normal(unsafe { OsStr::from_encoded_bytes_unchecked(comp) })),
         }
     }
 
@@ -896,7 +896,7 @@ impl<'a> Iterator for Components<'a> {
                     let raw = &self.path[..self.prefix_len()];
                     self.path = &self.path[self.prefix_len()..];
                     return Some(Component::Prefix(PrefixComponent {
-                        raw: unsafe { OsStr::from_os_str_bytes_unchecked(raw) },
+                        raw: unsafe { OsStr::from_encoded_bytes_unchecked(raw) },
                         parsed: self.prefix.unwrap(),
                     }));
                 }
@@ -968,7 +968,7 @@ impl<'a> DoubleEndedIterator for Components<'a> {
                 State::Prefix if self.prefix_len() > 0 => {
                     self.back = State::Done;
                     return Some(Component::Prefix(PrefixComponent {
-                        raw: unsafe { OsStr::from_os_str_bytes_unchecked(self.path) },
+                        raw: unsafe { OsStr::from_encoded_bytes_unchecked(self.path) },
                         parsed: self.prefix.unwrap(),
                     }));
                 }
@@ -1477,17 +1477,17 @@ impl PathBuf {
     fn _set_extension(&mut self, extension: &OsStr) -> bool {
         let file_stem = match self.file_stem() {
             None => return false,
-            Some(f) => f.as_os_str_bytes(),
+            Some(f) => f.as_encoded_bytes(),
         };
 
         // truncate until right after the file stem
         let end_file_stem = file_stem[file_stem.len()..].as_ptr().addr();
-        let start = self.inner.as_os_str_bytes().as_ptr().addr();
+        let start = self.inner.as_encoded_bytes().as_ptr().addr();
         let v = self.as_mut_vec();
         v.truncate(end_file_stem.wrapping_sub(start));
 
         // add the new extension, if any
-        let new = extension.as_os_str_bytes();
+        let new = extension.as_encoded_bytes();
         if !new.is_empty() {
             v.reserve_exact(new.len() + 1);
             v.push(b'.');
@@ -2007,11 +2007,11 @@ impl Path {
     // The following (private!) function allows construction of a path from a u8
     // slice, which is only safe when it is known to follow the OsStr encoding.
     unsafe fn from_u8_slice(s: &[u8]) -> &Path {
-        unsafe { Path::new(OsStr::from_os_str_bytes_unchecked(s)) }
+        unsafe { Path::new(OsStr::from_encoded_bytes_unchecked(s)) }
     }
     // The following (private!) function reveals the byte encoding used for OsStr.
     fn as_u8_slice(&self) -> &[u8] {
-        self.inner.as_os_str_bytes()
+        self.inner.as_encoded_bytes()
     }
 
     /// Directly wraps a string slice as a `Path` slice.
@@ -2609,7 +2609,7 @@ impl Path {
 
     fn _with_extension(&self, extension: &OsStr) -> PathBuf {
         let self_len = self.as_os_str().len();
-        let self_bytes = self.as_os_str().as_os_str_bytes();
+        let self_bytes = self.as_os_str().as_encoded_bytes();
 
         let (new_capacity, slice_to_copy) = match self.extension() {
             None => {
diff --git a/library/std/src/sys/common/small_c_string.rs b/library/std/src/sys/common/small_c_string.rs
index 963d17a47e4..af9b18e372d 100644
--- a/library/std/src/sys/common/small_c_string.rs
+++ b/library/std/src/sys/common/small_c_string.rs
@@ -19,7 +19,7 @@ pub fn run_path_with_cstr<T, F>(path: &Path, f: F) -> io::Result<T>
 where
     F: FnOnce(&CStr) -> io::Result<T>,
 {
-    run_with_cstr(path.as_os_str().as_os_str_bytes(), f)
+    run_with_cstr(path.as_os_str().as_encoded_bytes(), f)
 }
 
 #[inline]
diff --git a/library/std/src/sys/common/tests.rs b/library/std/src/sys/common/tests.rs
index 0a1cbcbe8ef..32dc18ee1cf 100644
--- a/library/std/src/sys/common/tests.rs
+++ b/library/std/src/sys/common/tests.rs
@@ -8,7 +8,7 @@ use core::iter::repeat;
 fn stack_allocation_works() {
     let path = Path::new("abc");
     let result = run_path_with_cstr(path, |p| {
-        assert_eq!(p, &*CString::new(path.as_os_str().as_os_str_bytes()).unwrap());
+        assert_eq!(p, &*CString::new(path.as_os_str().as_encoded_bytes()).unwrap());
         Ok(42)
     });
     assert_eq!(result.unwrap(), 42);
@@ -25,7 +25,7 @@ fn heap_allocation_works() {
     let path = repeat("a").take(384).collect::<String>();
     let path = Path::new(&path);
     let result = run_path_with_cstr(path, |p| {
-        assert_eq!(p, &*CString::new(path.as_os_str().as_os_str_bytes()).unwrap());
+        assert_eq!(p, &*CString::new(path.as_os_str().as_encoded_bytes()).unwrap());
         Ok(42)
     });
     assert_eq!(result.unwrap(), 42);
diff --git a/library/std/src/sys/unix/os_str.rs b/library/std/src/sys/unix/os_str.rs
index 463b0a27515..7bd2f656a24 100644
--- a/library/std/src/sys/unix/os_str.rs
+++ b/library/std/src/sys/unix/os_str.rs
@@ -97,12 +97,12 @@ impl AsInner<[u8]> for Buf {
 
 impl Buf {
     #[inline]
-    pub fn into_os_str_bytes(self) -> Vec<u8> {
+    pub fn into_encoded_bytes(self) -> Vec<u8> {
         self.inner
     }
 
     #[inline]
-    pub unsafe fn from_os_str_bytes_unchecked(s: Vec<u8>) -> Self {
+    pub unsafe fn from_encoded_bytes_unchecked(s: Vec<u8>) -> Self {
         Self { inner: s }
     }
 
@@ -203,18 +203,18 @@ impl Buf {
 
 impl Slice {
     #[inline]
-    pub fn as_os_str_bytes(&self) -> &[u8] {
+    pub fn as_encoded_bytes(&self) -> &[u8] {
         &self.inner
     }
 
     #[inline]
-    pub unsafe fn from_os_str_bytes_unchecked(s: &[u8]) -> &Slice {
+    pub unsafe fn from_encoded_bytes_unchecked(s: &[u8]) -> &Slice {
         unsafe { mem::transmute(s) }
     }
 
     #[inline]
     pub fn from_str(s: &str) -> &Slice {
-        unsafe { Slice::from_os_str_bytes_unchecked(s.as_bytes()) }
+        unsafe { Slice::from_encoded_bytes_unchecked(s.as_bytes()) }
     }
 
     pub fn to_str(&self) -> Result<&str, crate::str::Utf8Error> {
diff --git a/library/std/src/sys/unix/os_str/tests.rs b/library/std/src/sys/unix/os_str/tests.rs
index 91bc0e61a4a..e2a99045e41 100644
--- a/library/std/src/sys/unix/os_str/tests.rs
+++ b/library/std/src/sys/unix/os_str/tests.rs
@@ -2,7 +2,7 @@ use super::*;
 
 #[test]
 fn slice_debug_output() {
-    let input = unsafe { Slice::from_os_str_bytes_unchecked(b"\xF0hello,\tworld") };
+    let input = unsafe { Slice::from_encoded_bytes_unchecked(b"\xF0hello,\tworld") };
     let expected = r#""\xF0hello,\tworld""#;
     let output = format!("{input:?}");
 
@@ -12,6 +12,6 @@ fn slice_debug_output() {
 #[test]
 fn display() {
     assert_eq!("Hello\u{FFFD}\u{FFFD} There\u{FFFD} Goodbye", unsafe {
-        Slice::from_os_str_bytes_unchecked(b"Hello\xC0\x80 There\xE6\x83 Goodbye").to_string()
+        Slice::from_encoded_bytes_unchecked(b"Hello\xC0\x80 There\xE6\x83 Goodbye").to_string()
     },);
 }
diff --git a/library/std/src/sys/unix/path.rs b/library/std/src/sys/unix/path.rs
index 935245f637b..837f68d3eaf 100644
--- a/library/std/src/sys/unix/path.rs
+++ b/library/std/src/sys/unix/path.rs
@@ -30,7 +30,7 @@ pub(crate) fn absolute(path: &Path) -> io::Result<PathBuf> {
 
     // Get the components, skipping the redundant leading "." component if it exists.
     let mut components = path.strip_prefix(".").unwrap_or(path).components();
-    let path_os = path.as_os_str().as_os_str_bytes();
+    let path_os = path.as_os_str().as_encoded_bytes();
 
     let mut normalized = if path.is_absolute() {
         // "If a pathname begins with two successive <slash> characters, the
diff --git a/library/std/src/sys/unix/process/process_common.rs b/library/std/src/sys/unix/process/process_common.rs
index 640648e8707..e7d1533f122 100644
--- a/library/std/src/sys/unix/process/process_common.rs
+++ b/library/std/src/sys/unix/process/process_common.rs
@@ -164,9 +164,9 @@ pub enum ProgramKind {
 
 impl ProgramKind {
     fn new(program: &OsStr) -> Self {
-        if program.as_os_str_bytes().starts_with(b"/") {
+        if program.as_encoded_bytes().starts_with(b"/") {
             Self::Absolute
-        } else if program.as_os_str_bytes().contains(&b'/') {
+        } else if program.as_encoded_bytes().contains(&b'/') {
             // If the program has more than one component in it, it is a relative path.
             Self::Relative
         } else {
diff --git a/library/std/src/sys/windows/args.rs b/library/std/src/sys/windows/args.rs
index 6b597f499bc..ee7dba6e5b3 100644
--- a/library/std/src/sys/windows/args.rs
+++ b/library/std/src/sys/windows/args.rs
@@ -226,7 +226,7 @@ pub(crate) fn append_arg(cmd: &mut Vec<u16>, arg: &Arg, force_quotes: bool) -> i
     // that it actually gets passed through on the command line or otherwise
     // it will be dropped entirely when parsed on the other end.
     ensure_no_nuls(arg)?;
-    let arg_bytes = arg.as_os_str_bytes();
+    let arg_bytes = arg.as_encoded_bytes();
     let (quote, escape) = match quote {
         Quote::Always => (true, true),
         Quote::Auto => {
@@ -298,7 +298,7 @@ pub(crate) fn make_bat_command_line(
         const SPECIAL: &[u8] = b"\t &()[]{}^=;!'+,`~%|<>";
         let force_quotes = match arg {
             Arg::Regular(arg) if !force_quotes => {
-                arg.as_os_str_bytes().iter().any(|c| SPECIAL.contains(c))
+                arg.as_encoded_bytes().iter().any(|c| SPECIAL.contains(c))
             }
             _ => force_quotes,
         };
diff --git a/library/std/src/sys/windows/os_str.rs b/library/std/src/sys/windows/os_str.rs
index 4708657a907..237854fac4e 100644
--- a/library/std/src/sys/windows/os_str.rs
+++ b/library/std/src/sys/windows/os_str.rs
@@ -64,12 +64,12 @@ impl fmt::Display for Slice {
 
 impl Buf {
     #[inline]
-    pub fn into_os_str_bytes(self) -> Vec<u8> {
+    pub fn into_encoded_bytes(self) -> Vec<u8> {
         self.inner.into_bytes()
     }
 
     #[inline]
-    pub unsafe fn from_os_str_bytes_unchecked(s: Vec<u8>) -> Self {
+    pub unsafe fn from_encoded_bytes_unchecked(s: Vec<u8>) -> Self {
         Self { inner: Wtf8Buf::from_bytes_unchecked(s) }
     }
 
@@ -162,12 +162,12 @@ impl Buf {
 
 impl Slice {
     #[inline]
-    pub fn as_os_str_bytes(&self) -> &[u8] {
+    pub fn as_encoded_bytes(&self) -> &[u8] {
         self.inner.as_bytes()
     }
 
     #[inline]
-    pub unsafe fn from_os_str_bytes_unchecked(s: &[u8]) -> &Slice {
+    pub unsafe fn from_encoded_bytes_unchecked(s: &[u8]) -> &Slice {
         mem::transmute(Wtf8::from_bytes_unchecked(s))
     }
 
diff --git a/library/std/src/sys/windows/path.rs b/library/std/src/sys/windows/path.rs
index c9c2d10e6c4..8c0e07b3566 100644
--- a/library/std/src/sys/windows/path.rs
+++ b/library/std/src/sys/windows/path.rs
@@ -22,12 +22,12 @@ pub fn is_verbatim_sep(b: u8) -> bool {
 
 /// Returns true if `path` looks like a lone filename.
 pub(crate) fn is_file_name(path: &OsStr) -> bool {
-    !path.as_os_str_bytes().iter().copied().any(is_sep_byte)
+    !path.as_encoded_bytes().iter().copied().any(is_sep_byte)
 }
 pub(crate) fn has_trailing_slash(path: &OsStr) -> bool {
-    let is_verbatim = path.as_os_str_bytes().starts_with(br"\\?\");
+    let is_verbatim = path.as_encoded_bytes().starts_with(br"\\?\");
     let is_separator = if is_verbatim { is_verbatim_sep } else { is_sep_byte };
-    if let Some(&c) = path.as_os_str_bytes().last() { is_separator(c) } else { false }
+    if let Some(&c) = path.as_encoded_bytes().last() { is_separator(c) } else { false }
 }
 
 /// Appends a suffix to a path.
@@ -49,7 +49,7 @@ impl<'a, const LEN: usize> PrefixParser<'a, LEN> {
     fn get_prefix(path: &OsStr) -> [u8; LEN] {
         let mut prefix = [0; LEN];
         // SAFETY: Only ASCII characters are modified.
-        for (i, &ch) in path.as_os_str_bytes().iter().take(LEN).enumerate() {
+        for (i, &ch) in path.as_encoded_bytes().iter().take(LEN).enumerate() {
             prefix[i] = if ch == b'/' { b'\\' } else { ch };
         }
         prefix
@@ -82,7 +82,7 @@ impl<'a> PrefixParserSlice<'a, '_> {
     }
 
     fn prefix_bytes(&self) -> &'a [u8] {
-        &self.path.as_os_str_bytes()[..self.index]
+        &self.path.as_encoded_bytes()[..self.index]
     }
 
     fn finish(self) -> &'a OsStr {
@@ -90,7 +90,7 @@ impl<'a> PrefixParserSlice<'a, '_> {
         // &[u8] and back. This is safe to do because (1) we only look at ASCII
         // contents of the encoding and (2) new &OsStr values are produced only
         // from ASCII-bounded slices of existing &OsStr values.
-        unsafe { OsStr::from_os_str_bytes_unchecked(&self.path.as_os_str_bytes()[self.index..]) }
+        unsafe { OsStr::from_encoded_bytes_unchecked(&self.path.as_encoded_bytes()[self.index..]) }
     }
 }
 
@@ -162,7 +162,7 @@ fn parse_drive(path: &OsStr) -> Option<u8> {
         drive.is_ascii_alphabetic()
     }
 
-    match path.as_os_str_bytes() {
+    match path.as_encoded_bytes() {
         [drive, b':', ..] if is_valid_drive_letter(drive) => Some(drive.to_ascii_uppercase()),
         _ => None,
     }
@@ -171,7 +171,7 @@ fn parse_drive(path: &OsStr) -> Option<u8> {
 // Parses a drive prefix exactly, e.g. "C:"
 fn parse_drive_exact(path: &OsStr) -> Option<u8> {
     // only parse two bytes: the drive letter and the drive separator
-    if path.as_os_str_bytes().get(2).map(|&x| is_sep_byte(x)).unwrap_or(true) {
+    if path.as_encoded_bytes().get(2).map(|&x| is_sep_byte(x)).unwrap_or(true) {
         parse_drive(path)
     } else {
         None
@@ -185,15 +185,15 @@ fn parse_drive_exact(path: &OsStr) -> Option<u8> {
 fn parse_next_component(path: &OsStr, verbatim: bool) -> (&OsStr, &OsStr) {
     let separator = if verbatim { is_verbatim_sep } else { is_sep_byte };
 
-    match path.as_os_str_bytes().iter().position(|&x| separator(x)) {
+    match path.as_encoded_bytes().iter().position(|&x| separator(x)) {
         Some(separator_start) => {
             let separator_end = separator_start + 1;
 
-            let component = &path.as_os_str_bytes()[..separator_start];
+            let component = &path.as_encoded_bytes()[..separator_start];
 
             // Panic safe
             // The max `separator_end` is `bytes.len()` and `bytes[bytes.len()..]` is a valid index.
-            let path = &path.as_os_str_bytes()[separator_end..];
+            let path = &path.as_encoded_bytes()[separator_end..];
 
             // SAFETY: `path` is a valid wtf8 encoded slice and each of the separators ('/', '\')
             // is encoded in a single byte, therefore `bytes[separator_start]` and
@@ -201,8 +201,8 @@ fn parse_next_component(path: &OsStr, verbatim: bool) -> (&OsStr, &OsStr) {
             // `bytes[..separator_start]` and `bytes[separator_end..]` are valid wtf8 slices.
             unsafe {
                 (
-                    OsStr::from_os_str_bytes_unchecked(component),
-                    OsStr::from_os_str_bytes_unchecked(path),
+                    OsStr::from_encoded_bytes_unchecked(component),
+                    OsStr::from_encoded_bytes_unchecked(path),
                 )
             }
         }
@@ -323,7 +323,7 @@ pub(crate) fn absolute(path: &Path) -> io::Result<PathBuf> {
     // Verbatim paths should not be modified.
     if prefix.map(|x| x.is_verbatim()).unwrap_or(false) {
         // NULs in verbatim paths are rejected for consistency.
-        if path.as_os_str_bytes().contains(&0) {
+        if path.as_encoded_bytes().contains(&0) {
             return Err(io::const_io_error!(
                 io::ErrorKind::InvalidInput,
                 "strings passed to WinAPI cannot contain NULs",
diff --git a/library/std/src/sys/windows/process.rs b/library/std/src/sys/windows/process.rs
index 92edd2f6112..6f46da1748a 100644
--- a/library/std/src/sys/windows/process.rs
+++ b/library/std/src/sys/windows/process.rs
@@ -429,7 +429,7 @@ fn resolve_exe<'a>(
     // Test if the file name has the `exe` extension.
     // This does a case-insensitive `ends_with`.
     let has_exe_suffix = if exe_path.len() >= EXE_SUFFIX.len() {
-        exe_path.as_os_str_bytes()[exe_path.len() - EXE_SUFFIX.len()..]
+        exe_path.as_encoded_bytes()[exe_path.len() - EXE_SUFFIX.len()..]
             .eq_ignore_ascii_case(EXE_SUFFIX.as_bytes())
     } else {
         false
@@ -459,7 +459,7 @@ fn resolve_exe<'a>(
         // From the `CreateProcessW` docs:
         // > If the file name does not contain an extension, .exe is appended.
         // Note that this rule only applies when searching paths.
-        let has_extension = exe_path.as_os_str_bytes().contains(&b'.');
+        let has_extension = exe_path.as_encoded_bytes().contains(&b'.');
 
         // Search the directories given by `search_paths`.
         let result = search_paths(parent_paths, child_paths, |mut path| {
diff --git a/src/tools/miri/src/shims/os_str.rs b/src/tools/miri/src/shims/os_str.rs
index f08f0aad5e7..a94b1ddcd95 100644
--- a/src/tools/miri/src/shims/os_str.rs
+++ b/src/tools/miri/src/shims/os_str.rs
@@ -24,7 +24,7 @@ pub fn bytes_to_os_str<'tcx>(bytes: &[u8]) -> InterpResult<'tcx, &OsStr> {
 }
 #[cfg(not(unix))]
 pub fn bytes_to_os_str<'tcx>(bytes: &[u8]) -> InterpResult<'tcx, &OsStr> {
-    // We cannot use `from_os_str_bytes_unchecked` here since we can't trust `bytes`.
+    // We cannot use `from_encoded_bytes_unchecked` here since we can't trust `bytes`.
     let s = std::str::from_utf8(bytes)
         .map_err(|_| err_unsup_format!("{:?} is not a valid utf-8 string", bytes))?;
     Ok(OsStr::new(s))
@@ -83,7 +83,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
         ptr: Pointer<Option<Provenance>>,
         size: u64,
     ) -> InterpResult<'tcx, (bool, u64)> {
-        let bytes = os_str.as_os_str_bytes();
+        let bytes = os_str.as_encoded_bytes();
         self.eval_context_mut().write_c_str(bytes, ptr, size)
     }
 
diff --git a/src/tools/miri/src/shims/unix/fs.rs b/src/tools/miri/src/shims/unix/fs.rs
index beaef22075b..dd2da3d22f2 100644
--- a/src/tools/miri/src/shims/unix/fs.rs
+++ b/src/tools/miri/src/shims/unix/fs.rs
@@ -1344,7 +1344,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
 
                 let mut name = dir_entry.file_name(); // not a Path as there are no separators!
                 name.push("\0"); // Add a NUL terminator
-                let name_bytes = name.as_os_str_bytes();
+                let name_bytes = name.as_encoded_bytes();
                 let name_len = u64::try_from(name_bytes.len()).unwrap();
 
                 let dirent64_layout = this.libc_ty_layout("dirent64");
@@ -1698,7 +1698,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                     Cow::Borrowed(resolved.as_ref()),
                     crate::shims::os_str::PathConversion::HostToTarget,
                 );
-                let mut path_bytes = resolved.as_os_str_bytes();
+                let mut path_bytes = resolved.as_encoded_bytes();
                 let bufsize: usize = bufsize.try_into().unwrap();
                 if path_bytes.len() > bufsize {
                     path_bytes = &path_bytes[..bufsize]
diff --git a/src/tools/miri/tests/utils/fs.rs b/src/tools/miri/tests/utils/fs.rs
index 47904926b48..0242a228068 100644
--- a/src/tools/miri/tests/utils/fs.rs
+++ b/src/tools/miri/tests/utils/fs.rs
@@ -6,7 +6,7 @@ use super::miri_extern;
 pub fn host_to_target_path(path: OsString) -> PathBuf {
     use std::ffi::{CStr, CString};
 
-    // Once into_os_str_bytes is stable we can use it here.
+    // Once into_encoded_bytes is stable we can use it here.
     // (Unstable features would need feature flags in each test...)
     let path = CString::new(path.into_string().unwrap()).unwrap();
     let mut out = Vec::with_capacity(1024);