https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121535
--- Comment #10 from Mikael Pettersson <mikpelinux at gmail dot com> --- I still recommend ia64 implement TARGET_ZERO_CALL_USED_REGS itself. Given that the purpose of the option is to prevent leakage, I wouldn't lose sleep over some predicate registers getting set to 1 rather than 0 (the important thing is that they're not left unset) -- it's still an improvement over the current state of the target.
