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Add two-argument fixpoint arity

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* module/language/cps2/utils.scm (fixpoint): Add two-argument arity.
This commit is contained in:
Andy Wingo 2015-05-19 08:34:30 +02:00
parent 4632f3d998
commit cb7aa0b3b1
1 changed files with 13 additions and 3 deletions
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16
module/language/cps2/utils.scm
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@ -122,9 +122,19 @@
(lambda (in out0 out1)
(worklist-fold2 f in out0 out1)))))
(define (fixpoint f x)
(let ((x* (f x)))
(if (eq? x x*) x* (fixpoint f x*))))
(define fixpoint
(case-lambda
((f x)
(let lp ((x x))
(let ((x* (f x)))
(if (eq? x x*) x* (lp x*)))))
((f x0 x1)
(let lp ((x0 x0) (x1 x1))
(call-with-values (lambda () (f x0 x1))
(lambda (x0* x1*)
(if (and (eq? x0 x0*) (eq? x1 x1*))
(values x0* x1*)
(lp x0* x1*))))))))
(define (compute-function-body conts kfun)
(persistent-intset