Cmm back end upgrades
Several changes in this patch, partially bug fixes, partially new code:
o bug fixes in ZipDataflow
- added some checks to verify that facts converge
- removed some erroneous checks of convergence on entry nodes
- added some missing applications of transfer functions
o changed dataflow clients to use ZipDataflow, making ZipDataflow0 obsolete
o eliminated DFA monad (no need for separate analysis and rewriting monads with ZipDataflow)
o started stack layout changes
- no longer generating CopyIn and CopyOut nodes (not yet fully expunged though)
- still not using proper calling conventions
o simple new optimizations:
- common block elimination
-- have not yet tried to move the Adams opt out of CmmProcPointZ
- block concatenation
o piped optimization fuel up to the HscEnv
- can be limited by a command-line flag
- not tested, and probably not yet properly used by clients
o added unique supply to FuelMonad, also lifted unique supply to DFMonad
31 files changed: