PSS llvm: avoid infinite loop when adding CFG edges
PSS llvm: avoid infinite loop when adding CFG edges

if program contains a loop from basic blocks that has no
pointers, we don't create those blocks, but we're trying to
add successors between such blocks - thus looping infinitely

Signed-off-by: Marek Chalupa <a05df156a69ad59faa9af9b666ef78009594c145@gmail.com>

mchalupa/dg,mchalupa/dg,mchalupa/dg,mchalupa/dg