(fcexp.fcFix.fcEta): Fix typo.

(loopify.lexp.cfun): Don't forget to empty TFS when TCP is not true.

(FLINTComp.flintcomp): Convert named type vars
in `fi' back into deBruijn indices since this is still the
representation used outside of flintcomp (i.e. in LSplitInline).

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2000-06-16  Fixed the abcOpt phase. See FLINT/ChangeLog for details.

bring revisions from the vendor branch to the trunk

* opt/flintopt.txt: New file.
* main/control.sml (phases): Move loopify+fixfix to before wrap.
* cpsopt/cpsopt.sml (zeroexpand): New function.
* TopLevel/viscomp/control.sml (cpsopt): Add `zeroexpand' to reduce
RA-blowup when compiling ml.grm.sml.

* main/control.sml (phases): Move loopify (and its fixfix) to before
`reify' (while still keeping a fixfix after reify).
* TopLevel/viscomp/control.sml (cpsopt): Remove all but first_contract.
* TopLevel/interact/evalloop.sml (loop): Don't hide compiler errors.

* opt/switchoff.sml: Remove.
* reps/equal.sml: Rewritten to generate more CPS-like code.
* opt/fcontract.sml (fcLet): re-introduced the branch/switch code,
but without the deadly multiple traversals.
* */control.sml: Less flintopt and more cpsopt.

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somewhat functional

* opt/split.sml (sexp): don't split HANDLE (it's incorrect).
(funeffect): embryo to detect side-effect free APPs (non-functional).
(splitThreshold): to put a cap on inlining.
(stfn): don't bother splitting inlinable TFNs.
* opt/fixfix.sml (curry): fixed bug when uncurrying cooked functions.
* opt/fcontract.sml (fcFun):  fix bug when undertaking mut-rec functions.
* main/flintcomp.sml:  added `recover' to help debugging.
updated the fold to allow extraction of Fi and return it at the end.
* lsplit/ls-inline.sml (oneBranch): fixed the wrapper function.
* flint/flintutil.sml (freevars):  forgot to count the arg of SWITCH.
* flint/flint.sig:  added a tfkind to TFN (only inlining for now).
* main/control.sml: new file. Moved from TopLevel/viscomp/control.sml
(splitThreshold): new var.
* TopLevel/viscomp/control.sig (FLINT.printFctTypes): to reduce clutter.
(splitThreshold): to control splitting agressiveness.
* TopLevel/viscomp/control.sml:  moved substructs outside so that clients
  can refer to them directly (rather than through Control.Foo) to reduce
  spurious dependencies.
* TopLevel/main/{codes,compile}: call `split' from flintcomp, not compile.
* kernel/ltyextern.sml (tnarrow), reps/{reify,rttype,typeoper}.sml:
  flatten arguments when reifying them since the pretty-printer doesn't
  know how to deal with flattened reified TFNs.

* opt/fcontract.sml: turned fcFun into a foldable function.
* opt/loopify.sml: added loop-invariant arg removal.

Added IH_MAYBE to allow more selective inlining.

Merged in Bratin's typelifting and Chris' named tvars.
FLINT is now using tvars from the first lcontract all the way to cps.

* reps/rttype.sml: changes from Bratin.
(rtLexp): define the NVAR case (return the tvar as an lvar).
* opt/[fl]contract.sml: removed the restriction on inlining at the same
  deBruijn depth.
* opt/lift.sml: new file for typelifting.
* flint/flintutil.sml (copy): added tvar renaming.
* flint/tvarcvt.sml: new file for named tvar <-> deBruijn conversions.

* opt/loopify.sml: new file
* cps/convert.sml: added code to take advantage of LK_WHILE loops.

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* opt/collect.sml(info): got rid of Transfer
(unuselexp): junk the fundec part.
(unuse): return a boolean instead of calling an undertaker.

* opt/fcontract.sml: take advantage of single-arm SWITCH (aka decon)
(SWITCH(CON)): just compare the conreps because types may differ (?)
(inlineWitness): ugly hack used to figure out if inlining happened,
  in order to decide whether to keep the inline bit or not (in cfun).

* added basic unrolling support
* changed fkind to have most annotations valid on
  functors as well.  It also adds a loopkind annotation as well as extends
  the inline boolean into a three-way alternative.
* switched to a continuation passing style to implement the
  let-associativity rule in a better way.

* opt/fcontract.sml (dropcstargs): replace constant args by the constant.

* opt/fixfix.sml (curry): correctly handle "imposible" cases.

* opt/collect.sml: completely revisited:  no distinction between
  internal/external uses, dead-code elimination done right away.  This
  makes fcontract a little simpler.

added dropping of dead-arguments

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