http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52397
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-02-27 12:04:16 UTC --- > What is specific about FUNCTION_ARG_REGNO_P regs? We know more or less how they behave. They (may) hold arguments on entry and thus have an artificial def in the entry block. > We generally need to either reset, or adjust debug insns that refer registers > that aren't live at that point when ignoring the debug insn uses. Sure, but doing it correctly for any hard register might prove tricky.
