search for: specialisiation

...blocks in a machine function (i.e. starting from the last block and following predecessor edges) for a liveness analysis I'm writing. idf_iterator seems like it's almost the class I need, but it starts at the first block in the function at present, rather than the last one (because of the specialisiation of GraphTraits for Inverse<MachineFunction*> - getEntryNode returns mf->front()). That seems odd to me - you can only ever get to the first block with it (incrementing the iterator once yields idf_end(mf), and there's no decrement operation). Is this behaviour intentional? If it is I...

...ing. As Gordon mentioned, there isn't a trivial way to do this, as there isn't a single exit node in the MBB CFG. > idf_iterator seems like it's almost the class I need, but it starts at > the first block in the function at present, rather than the last one > (because of the specialisiation of GraphTraits for > Inverse<MachineFunction*> - getEntryNode returns mf->front()). That > seems odd to me - you can only ever get to the first block with it > (incrementing the iterator once yields idf_end(mf), and there's no > decrement operation). That seems odd to me t...