1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
;;; This file handles common subexpressions in the interface file.
;;; Common subexpressions are detected in two places: gtypes and strictness
;;; properties.
;;; Compressing strictness signatures
;;; A strictness is represented by a list of booleans. We do two things to
;;; compress strictnesses: all lists less than *pre-defined-strictness-size*
;;; are pre-computed in a vector and the first *pre-defined-strictness-vars*
;;; vector elements are cached in global vars. The strictness will dump as
;;; as either a global or as a vector reference into the vector.
(define (initialize-strictness-table)
(setf (dynamic *pre-defined-strictness-table*)
(make-vector (expt 2 (1+ (dynamic *pre-defined-strictness-size*)))))
(setf (vector-ref *pre-defined-strictness-table* 1) '())
(do ((i 1 (1+ i))
(j 1 (* j 2))
(k 2 (* k 2)))
((> i *pre-defined-strictness-size*))
(do ((l 0 (1+ l)))
((>= l j))
(setf (vector-ref *pre-defined-strictness-table* (+ k l))
(cons '#f (vector-ref *pre-defined-strictness-table* (+ j l))))
(setf (vector-ref *pre-defined-strictness-table* (+ k j l))
(cons '#t (vector-ref *pre-defined-strictness-table* (+ j l))))))
(set-strictness-vars))
(define (strictness-table-ref x)
(vector-ref (dynamic *pre-defined-strictness-table*) x))
(define (dump-strictness s)
(if (null? s)
''()
(dump-strictness-1 s s 0 0)))
(define (dump-strictness-1 s s1 n size)
(if (null? s1)
(if (> size *pre-defined-strictness-size*)
(dump-big-strictness (- size *pre-defined-strictness-size*) s)
(let ((k (+ n (expt 2 size))))
(if (< k *pre-defined-strictness-vars*)
`(dynamic ,(vector-ref *pre-defined-strictness-names* k))
`(strictness-table-ref ,k))))
(dump-strictness-1 s (cdr s1) (+ (* 2 n) (if (car s1) 1 0)) (1+ size))))
(define (dump-big-strictness k s)
(if (= k 0)
(dump-strictness s)
`(cons ',(car s)
,(dump-big-strictness (1- k) (cdr s)))))
;;; This routine handles saving type signatures (gtypes).
;;; common subexpressions are detected in two places: the type body
;;; and the the contexts.
(define (init-predefined-gtyvars)
(setf *saved-gtyvars* (make-vector *num-saved-gtyvars*))
(dotimes (i *num-saved-gtyvars*)
(setf (vector-ref *saved-gtyvars* i) (**gtyvar i)))
(setup-gtyvar-vars))
(define (init-cse-structs)
(initialize-strictness-table)
(init-predefined-gtyvars))
(define (save-cse-value v)
(setf (vector-ref (dynamic *saved-cse-values*) (dynamic *cse-value-num*)) v)
(incf (dynamic *cse-value-num*)))
(define (cse-init-code)
(let* ((n (length *cse-objects*))
(init-code '()))
(do ((i (1- n) (1- i))
(init *cse-objects* (cdr init)))
((null? init))
(push `(save-cse-value ,(car init)) init-code))
`((setf *saved-cse-values* (make-vector ,n))
(setf *cse-value-num* 0)
,@init-code)))
(define (remember-dumped-object init-code)
(push init-code *cse-objects*)
(incf *cse-object-num*)
*cse-object-num*)
(define (cse-value-ref x)
(vector-ref (dynamic *saved-cse-values*) x))
(define (cse-ref-code n)
(cond ((eqv? n 0)
''())
((<= n *num-saved-gtyvars*)
`(dynamic ,(vector-ref *saved-gtyvar-varnames* (1- n))))
(else
`(cse-value-ref ,(- n *num-saved-gtyvars* 1)))))
(define (dump-gtyvar g)
(let ((n (gtyvar-varnum g)))
(if (< n *num-saved-gtyvars*)
(1+ n)
(remember-dumped-object `(**gtyvar ,n)))))
(define (dump-context-list contexts)
(if (null? contexts)
0
(let* ((rest (dump-context-list (cdr contexts)))
(classes (dump-class-list (car contexts)))
(t1 (assq/insert-l classes *gtype-class-index*))
(res (assq/insert rest (cdr t1))))
(if (eq? (cdr res) '#f)
(let ((z (remember-dumped-object
`(cons ,(cse-ref-code classes) ,(cse-ref-code rest)))))
(setf (cdr res) z)
z)
(cdr res)))))
(define (dump-class-list classes)
(if (null? classes)
0
(let* ((rest (dump-class-list (cdr classes)))
(class (dump-class/n (car classes)))
(t1 (assq/insert-l class *context-class-index*))
(res (assq/insert rest (cdr t1))))
(if (eq? (cdr res) '#f)
(let ((z (remember-dumped-object
`(cons ,class ,(cse-ref-code rest)))))
(setf (cdr res) z)
z)
(cdr res)))))
(define (dump-gtype-1 g)
(cond ((gtyvar? g)
(dump-gtyvar g))
((ntyvar? g)
(dump-gtype-1 (prune g)))
(else
(dump-gtycon g))))
(define (dump-gtycon g)
(let* ((ty (ntycon-tycon g))
(tycon (if (algdata? ty) (dump-algdata/n ty) (dump-synonym/n ty)))
(l (dump-gtype-list (ntycon-args g)))
(t1 (assq/insert-l tycon *gtype-tycon-index*))
(res (assq/insert l (cdr t1))))
(if (eq? (cdr res) '#f)
(let ((z (remember-dumped-object
`(**ntycon ,tycon ,(cse-ref-code l)))))
(setf (cdr res) z)
z)
(cdr res))))
(define (dump-gtype-list l)
(if (null? l)
0
(let* ((g (dump-gtype-1 (car l)))
(rest (dump-gtype-list (cdr l)))
(t1 (assq/insert-l g *gtype-list-index*))
(res (assq/insert rest (cdr t1))))
(if (eq? (cdr res) '#f)
(let ((z (remember-dumped-object
`(cons ,(cse-ref-code g)
,(cse-ref-code rest)))))
(setf (cdr res) z)
z)
(cdr res)))))
(define (dump-gtype/cse g)
(cse-ref-code
(let* ((context (dump-context-list (gtype-context g)))
(type (dump-gtype-1 (gtype-type g)))
(t1 (assq/insert-l type *gtype-index*))
(res (assq/insert context (cdr t1))))
(if (eq? (cdr res) '#f)
(let ((z (remember-dumped-object
`(**gtype ,(cse-ref-code context)
,(cse-ref-code type)))))
(setf (cdr res) z)
z)
(cdr res)))))
|
