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. 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. Thanks, Revital
