This is the mail archive of the
mailing list for the GCC project.
Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
> We'd certainly need something to say that a function call instruction is
> deletable if its value is unused; in general, of course, we assume
> function calls have important side-effects.
I thought we have a flag for that now, but I'm not sure I remember which one.
I agree that it may well be the case that libcalls are ALREADY unnecessary,
but I'm not quite ready to assert that myself.