------- Additional Comments From amacleod at redhat dot com 2005-02-08 14:26 ------- (In reply to comment #28) > Using var_to_partition does not help. The reason is that the SSA names with > the same root var are not in the same partition, e.g. > > <retval>_7 --> <retval> > x_3 --> x > x_4 not coalesced with x --> New temp: 'x.0' > x_5 not coalesced with x.0 --> New temp: 'x.1' <...> > > Partition 0 (a - 1 ) > Partition 1 (b - 2 ) > Partition 2 (x - 3 ) > Partition 3 (x.0 - 4 ) > Partition 4 (x.1 - 5 ) > Partition 5 (<retval> - 7 ) > > So if you replace the root var comparison in my hack with a check to make > sure > def and def2 are not in the same partition, that whole check will always be > false and you still get crap code. >
of course. doh. Accumulation will result in live range splitting, so they will all be different variables. Stick with checking the root variable, its probably our simplest measure I guess. :-) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17549
