- if (Abort) {
- // This shouldn't have happened :-(
- // However we are aware of at least one existing problem where we
- // can't merge subranges when multiple ranges end up in the
- // "overflow bit" 32. As a workaround we drop all subregister ranges
- // which means we loose some precision but are back to a well defined
- // state.
- assert(TargetRegisterInfo::isImpreciseLaneMask(
- CP.getNewRC()->getLaneMask())
- && "SubRange merge should only fail when merging into bit 32.");
- DEBUG(dbgs() << "\tSubrange join aborted!\n");
- LHS.clearSubRanges();
- RHS.clearSubRanges();
- } else {
- DEBUG(dbgs() << "\tJoined SubRanges " << LHS << "\n");