Revised https://maskray.me/blog/2025-08-24-understanding-alignment-from-source-to-object-file on LLVM's recent .prefalign change. Filed a GNU Assembler feature request https://sourceware.org/bugzilla/show_bug.cgi?id=33943 ("gas: .prefalign directive for body-size-dependent function alignment") and https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124314 ("Emit .prefalign for body-size-dependent function alignment")