43 lines
1.3 KiB
Racket
43 lines
1.3 KiB
Racket
#lang typed/racket
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(require "ast.rkt")
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(struct State ([stack : Stack] [dump : Dump] [heap : Heap] [globals : Globals] [stats : Stats]))
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(define-type Addr Symbol)
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(define-type Stack (Listof Addr))
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(define-type Dump Null)
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(define-type Heap (Immutable-HashTable Addr Node))
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(define-type Node (∪ (List Addr Addr) CoreScDefn Integer))
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(define-type Globals (Immutable-HashTable Name Addr))
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(define-type Stats Nonnegative-Integer)
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(: new-addr (-> Addr))
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(define (new-addr)
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(gensym))
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(: initial-dump Dump)
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(define initial-dump '())
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(: initial-stats Stats)
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(define initial-stats 0)
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(: incr-stats (-> Stats Stats))
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(define incr-stats add1)
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(: update-stats (-> (-> Stats Stats) State State))
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(define (update-stats f mstate)
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(struct-copy State mstate [stats (f (State-stats mstate))]))
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(: allocate-node (-> Heap Node (Values Heap Addr)))
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(define (allocate-node heap node)
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(let ([addr (new-addr)])
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(values (hash-set heap addr node) addr)))
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(: allocate-sc (-> Heap CoreScDefn (Values Heap (Pair Name Addr))))
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(define (allocate-sc heap scdef)
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(let-values ([(heap addr) (allocate-node heap scdef)])
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(values heap (cons (scdefn-name scdef) addr))))
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;; (: initial-heap (-> (Listof CoreScDefn) (Values Heap Globals)))
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;; (define (initial-heap scs)
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;; (for/fold ([heap ])))
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