Coding eror in rtlanal.c:reg_set_last() (GCC 3.4 2004/01/21 snapshot).

[Anmol Paralkar]

Hello Jim,

 Thanks for your mail.

 I see that I can use: rtlanal.c:find_last_value() instead,
 to find the last value a given REG has been set to.

Regards,
Anmol P. Paralkar

On Fri, 16 Apr 2004, Jim Wilson wrote:

> Anmol Paralkar wrote:
> > !           last_value = SET_SRC (set);
>
> This is correct.  However, I see that the function reg_set_last has been
> unused since April 1990, and before that, it was only used in one
> specific place in the jump optimization pass.  It might be better to
> remove it than to fix it.
>
> Are you trying to use it perhaps?  What are you using it for?
>
> I think the function has other potential problems.  For instance, it
> doesn't handle volatile asms.  It shouldn't be moving reg values across
> volatile asms.  It claims that it won't return a MEM, but it returns
> SUBREG without checking for SUBREG MEM.  There may be other problems.
>
> Whether it will work probably depends on what you are trying to do with it.
> --
> Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com
>
>