make mem::{zeroed,uninitialized} inline(always)

Author: RalfJung

src/libcore/mem/mod.rs

@@ -490,7 +490,7 @@ pub const fn needs_drop<T>() -> bool {
 ///
 /// let _x: &i32 = unsafe { mem::zeroed() }; // Undefined behavior!
 /// ```
-#[inline]
+#[inline(always)]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated_in_future)]
 #[allow(deprecated)]
@@ -525,7 +525,7 @@ pub unsafe fn zeroed<T>() -> T {
 /// [uninit]: union.MaybeUninit.html#method.uninit
 /// [assume_init]: union.MaybeUninit.html#method.assume_init
 /// [inv]: union.MaybeUninit.html#initialization-invariant
-#[inline]
+#[inline(always)]
 #[rustc_deprecated(since = "1.39.0", reason = "use `mem::MaybeUninit` instead")]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated_in_future)]