1. Make sure to clear() 'this' before adding elements to it
2. Make sure that the leaders of the RHS EC are the leaders of the LHS EC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20692 91177308-0d34-0410-b5e6-96231b3b80d8
1. It now actually uses tarjan's algorithm, so it is a efficient inverse
ackerman's function for union operations, not linear time.
2. It now stores one copy of the data in the set instead of two.
3. It now works for elements other than pointers.
4. It now has a more STL-like interface that exposes iterators instead
of internal implementation details.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20677 91177308-0d34-0410-b5e6-96231b3b80d8
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
class for each leader. Finally, rename Elem2ECLeaderMap to Elem2LeaderMap
(most of the changed lines are only due to the latter).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13651 91177308-0d34-0410-b5e6-96231b3b80d8
