use AddPredecessorToBlock in 3 places instead of a manual loop.

llvm-svn: 121755
1 file changed
tree: 950337425a2f34981d33eb621a2f5ee8be7fe706
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. lldb/
  6. llvm/