Avoid referencing LLVM specifically

Co-authored-by: Josh Stone <[email protected]>

Author: Mark-Simulacrum

library/alloc/src/vec/mod.rs

@@ -1991,7 +1991,7 @@ impl<T, A: Allocator> Vec<T, A> {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_confusables("push_back", "put", "append")]
     pub fn push(&mut self, value: T) {
-        // Inform LLVM that the length does not change across grow_one().
+        // Inform codegen that the length does not change across grow_one().
         let len = self.len;
         // This will panic or abort if we would allocate > isize::MAX bytes
         // or if the length increment would overflow for zero-sized types.