Auto merge of #96108 - Dylan-DPC:rollup-t5f2fc9, r=Dylan-DPC

Rollup of 9 pull requests

Successful merges:

 - #93969 (Only add codegen backend to dep info if -Zbinary-dep-depinfo is used)
 - #94605 (Add missing links in platform support docs)
 - #95372 (make unaligned_references lint deny-by-default)
 - #95859 (Improve diagnostics for unterminated nested block comment)
 - #95961 (implement SIMD gather/scatter via vector getelementptr)
 - #96004 (Consider lifetimes when comparing types for equality in MIR validator)
 - #96050 (Remove some now-dead code that was only relevant before deaggregation.)
 - #96070 ([test] Add test cases for untested functions for BTreeMap)
 - #96099 (MaybeUninit array cleanup)

Failed merges:

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

compiler/rustc_middle/src/mir/mod.rs

@@ -2518,7 +2518,8 @@ pub enum Rvalue<'tcx> {
     /// * `Offset` has the same semantics as [`offset`](pointer::offset), except that the second
     ///   parameter may be a `usize` as well.
     /// * The comparison operations accept `bool`s, `char`s, signed or unsigned integers, floats,
-    ///   raw pointers, or function pointers of matching types and return a `bool`.
+    ///   raw pointers, or function pointers and return a `bool`. The types of the operands must be
+    ///   matching, up to the usual caveat of the lifetimes in function pointers.
     /// * Left and right shift operations accept signed or unsigned integers not necessarily of the
     ///   same type and return a value of the same type as their LHS. Like in Rust, the RHS is
     ///   truncated as needed.