"Unrolling failure: unknown insns between BEG note and loop label.\n");
return;
}
+ if (LABEL_NAME (start_label))
+ {
+ /* The jump optimization pass must have combined the original start label
+ with a named label for a goto. We can't unroll this case because
+ jumps which go to the named label must be handled differently than
+ jumps to the loop start, and it is impossible to differentiate them
+ in this case. */
+ if (loop_dump_stream)
+ fprintf (loop_dump_stream,
+ "Unrolling failure: loop start label is gone\n");
+ return;
+ }
if (unroll_type == UNROLL_NAIVE
&& GET_CODE (last_loop_insn) == BARRIER