On 10/24/07, Revital1 Eres <[EMAIL PROTECTED]> wrote: > > Hello, > > While testing a patch for the SMS I got an ICE which seems > to be related to the fact we build def-use chains only > and not use-def chains. (removed in the following patch - > http://gcc.gnu.org/ml/gcc-patches/2006-12/msg01682.html)
> The problem arises when we delete an insn from the df that contains a > use but do not update the def-use chain of it's def as we do not have > the use-def chain to reach it's def, This later causes a problem when > we try to dump the def-use chain of it's def. I'm sorry but I don't understand the description of the problem. What do you mean by "dump" and what problem does this "dump" cause ? > So, it seems that when asking for only def-use problem and later dump > the function we should ask for use-def problem as well to avoid cases > like the above. The df chain dump routines are supposed to handle DU-only or UD-only cases properly. If that's not the case, please send us a testcase (and preferably file a bugzilla report). Thanks, Seongbae
