What happens when you put a loop in your code? Edward
Excerpts from Jan Stolarek's message of Tue Jul 30 08:34:44 -0700 2013: > I'll allow myself to ask my second question again: > > 2) In my algorithm I need to initialize all of the blocks in a graph with > bottom element of a lattice, except for the entry block, which needs some > other initial values. I've written something like this: > > cmmCopyPropagation dflags graph = do > let entry_blk = g_entry graph > g' <- dataflowPassFwd graph [(entry_blk, (Top, Top))] $ > analRewFwd cpLattice cpTransfer cpRewrite > return . fst $ g' > > cpLattice = DataflowLattice "copy propagation" (Bottom, Bottom) cpJoin > > However, it seems that Bottom values passed to cpLattice are ignored - I > could replace second parameter to DataflowLattice with `undefined` and the > code would still run without causing an error. Is there something obviously > wrong in the way I pass initial fact values to dataflowPassFwd, or should I > look for the problem in other parts of my code? > > Janek _______________________________________________ ghc-devs mailing list [email protected] http://www.haskell.org/mailman/listinfo/ghc-devs
