// at least one of the values is LI. Since this means that we won't be able
// to eliminate LI even if we insert uses in the other predecessors, we will
// end up increasing code size. Reject this by scanning for LI.
- if (!EnableFullLoadPRE) {
- for (unsigned i = 0, e = ValuesPerBlock.size(); i != e; ++i)
- if (ValuesPerBlock[i].isSimpleValue() &&
- ValuesPerBlock[i].getSimpleValue() == LI)
+ for (unsigned i = 0, e = ValuesPerBlock.size(); i != e; ++i) {
+ if (ValuesPerBlock[i].isSimpleValue() &&
+ ValuesPerBlock[i].getSimpleValue() == LI) {
+ // Skip cases where LI is the only definition, even for EnableFullLoadPRE.
+ if (!EnableFullLoadPRE || e == 1)
return false;
+ }
}
// FIXME: It is extremely unclear what this loop is doing, other than