Further rework of tail merge algorithm.  Not quite
semantically identical, but little difference in
either results or execution speed; but it's much
easier to read, at least IMO.

llvm-svn: 50999
1 file changed
tree: 56e92f22b6ee8e0dae34d009e8897a6ff69e4cde
  1. clang/
  2. llvm/