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17e90c5e KN |
1 | ;;; GHIL -> GLIL compiler |
2 | ||
3 | ;; Copyright (C) 2001 Free Software Foundation, Inc. | |
4 | ||
5 | ;; This program is free software; you can redistribute it and/or modify | |
6 | ;; it under the terms of the GNU General Public License as published by | |
7 | ;; the Free Software Foundation; either version 2, or (at your option) | |
8 | ;; any later version. | |
9 | ;; | |
10 | ;; This program is distributed in the hope that it will be useful, | |
11 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | ;; GNU General Public License for more details. | |
14 | ;; | |
15 | ;; You should have received a copy of the GNU General Public License | |
16 | ;; along with this program; see the file COPYING. If not, write to | |
17 | ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | ;; Boston, MA 02111-1307, USA. | |
19 | ||
20 | ;;; Code: | |
21 | ||
22 | (define-module (system il compile) | |
17e90c5e | 23 | :use-syntax (system base syntax) |
17e90c5e KN |
24 | :use-module (system il glil) |
25 | :use-module (system il ghil) | |
26 | :use-module (ice-9 common-list) | |
27 | :export (compile)) | |
28 | ||
29 | (define (compile x e . opts) | |
17e90c5e KN |
30 | (if (memq :O opts) (set! x (optimize x))) |
31 | (codegen x)) | |
32 | ||
33 | \f | |
34 | ;;; | |
35 | ;;; Stage 2: Optimization | |
36 | ;;; | |
37 | ||
38 | (define (optimize x) | |
67169b29 | 39 | (record-case x |
61dc81d9 | 40 | ((<ghil-set> env loc var val) |
849cefac | 41 | (make-ghil-set env var (optimize val))) |
3616e9e9 | 42 | |
61dc81d9 | 43 | ((<ghil-if> env loc test then else) |
849cefac | 44 | (make-ghil-if (optimize test) (optimize then) (optimize else))) |
3616e9e9 | 45 | |
61dc81d9 | 46 | ((<ghil-begin> env loc exps) |
849cefac | 47 | (make-ghil-begin (map optimize exps))) |
3616e9e9 | 48 | |
61dc81d9 | 49 | ((<ghil-bind> env loc vars vals body) |
849cefac | 50 | (make-ghil-bind env vars (map optimize vals) (optimize body))) |
3616e9e9 | 51 | |
61dc81d9 | 52 | ((<ghil-lambda> env loc vars rest body) |
849cefac | 53 | (make-ghil-lambda env vars rest (optimize body))) |
3616e9e9 | 54 | |
a52b2d3d LC |
55 | ;; FIXME: <ghil-inst> does not exist. -- Ludo'. |
56 | ; (($ <ghil-inst> inst args) | |
849cefac | 57 | ; (make-ghil-inst inst (map optimize args))) |
3616e9e9 | 58 | |
61dc81d9 AW |
59 | ((<ghil-call> env loc proc args) |
60 | (let ((parent-env env)) | |
61 | (record-case proc | |
62 | ;; ((@lambda (VAR...) BODY...) ARG...) => | |
63 | ;; (@let ((VAR ARG) ...) BODY...) | |
64 | ((<ghil-lambda> env loc vars rest body) | |
65 | (cond | |
66 | ((not rest) | |
67 | (for-each (lambda (v) | |
68 | (case (ghil-var-kind v) | |
69 | ((argument) (set! (ghil-var-kind v) 'local))) | |
70 | (set! (ghil-var-env v) parent-env) | |
71 | (ghil-env-add! parent-env v)) | |
72 | (ghil-env-variables env))) | |
73 | (else | |
74 | (make-ghil-call parent-env (optimize proc) (map optimize args))))) | |
75 | (else | |
76 | (make-ghil-call parent-env (optimize proc) (map optimize args)))))) | |
77 | ||
17e90c5e KN |
78 | (else x))) |
79 | ||
80 | \f | |
81 | ;;; | |
82 | ;;; Stage 3: Code generation | |
83 | ;;; | |
84 | ||
849cefac AW |
85 | (define *ia-void* (make-glil-void)) |
86 | (define *ia-drop* (make-glil-call 'drop 0)) | |
87 | (define *ia-return* (make-glil-call 'return 0)) | |
17e90c5e KN |
88 | |
89 | (define (make-label) (gensym ":L")) | |
90 | ||
91 | (define (make-glil-var op env var) | |
aa0a011b | 92 | (case (ghil-var-kind var) |
17e90c5e | 93 | ((argument) |
aa0a011b | 94 | (make-glil-argument op (ghil-var-index var))) |
17e90c5e | 95 | ((local) |
aa0a011b | 96 | (make-glil-local op (ghil-var-index var))) |
17e90c5e KN |
97 | ((external) |
98 | (do ((depth 0 (1+ depth)) | |
aa0a011b AW |
99 | (e env (ghil-env-parent e))) |
100 | ((eq? e (ghil-var-env var)) | |
101 | (make-glil-external op depth (ghil-var-index var))))) | |
17e90c5e | 102 | ((module) |
6167de4f AW |
103 | (let ((env (ghil-var-env var))) |
104 | (make-glil-module op (and env (ghil-mod-module (ghil-env-mod env))) | |
105 | (ghil-var-name var)))) | |
9cc649b8 AW |
106 | ((unresolved) |
107 | (make-glil-late-bound op (ghil-var-name var))) | |
17e90c5e KN |
108 | (else (error "Unknown kind of variable:" var)))) |
109 | ||
110 | (define (codegen ghil) | |
111 | (let ((stack '())) | |
112 | (define (push-code! code) | |
113 | (set! stack (cons code stack))) | |
aa0a011b AW |
114 | (define (push-bindings! vars) |
115 | (if (not (null? vars)) | |
116 | (push-code! | |
117 | (make-glil-bind | |
118 | (map list | |
119 | (map ghil-var-name vars) | |
120 | (map ghil-var-kind vars) | |
121 | (map ghil-var-index vars)))))) | |
17e90c5e | 122 | (define (comp tree tail drop) |
cb4cca12 | 123 | (define (push-label! label) |
849cefac | 124 | (push-code! (make-glil-label label))) |
cb4cca12 | 125 | (define (push-branch! inst label) |
849cefac | 126 | (push-code! (make-glil-branch inst label))) |
ac99cb0c | 127 | (define (push-call! loc inst args) |
cb4cca12 | 128 | (for-each comp-push args) |
849cefac AW |
129 | (push-code! (make-glil-call inst (length args))) |
130 | (push-code! (make-glil-source loc))) | |
17e90c5e KN |
131 | ;; possible tail position |
132 | (define (comp-tail tree) (comp tree tail drop)) | |
133 | ;; push the result | |
134 | (define (comp-push tree) (comp tree #f #f)) | |
135 | ;; drop the result | |
136 | (define (comp-drop tree) (comp tree #f #t)) | |
cb4cca12 KN |
137 | ;; drop the result if unnecessary |
138 | (define (maybe-drop) | |
139 | (if drop (push-code! *ia-drop*))) | |
140 | ;; return here if necessary | |
141 | (define (maybe-return) | |
142 | (if tail (push-code! *ia-return*))) | |
17e90c5e KN |
143 | ;; return this code if necessary |
144 | (define (return-code! code) | |
145 | (if (not drop) (push-code! code)) | |
cb4cca12 | 146 | (maybe-return)) |
17e90c5e | 147 | ;; return void if necessary |
cb4cca12 KN |
148 | (define (return-void!) |
149 | (return-code! *ia-void*)) | |
150 | ;; return object if necessary | |
151 | (define (return-object! obj) | |
10be7025 | 152 | (return-code! (make-glil-const #:obj obj))) |
17e90c5e KN |
153 | ;; |
154 | ;; dispatch | |
67169b29 AW |
155 | (record-case tree |
156 | ((<ghil-void>) | |
17e90c5e KN |
157 | (return-void!)) |
158 | ||
67169b29 | 159 | ((<ghil-quote> env loc obj) |
cb4cca12 KN |
160 | (return-object! obj)) |
161 | ||
67169b29 | 162 | ((<ghil-quasiquote> env loc exp) |
cb4cca12 | 163 | (let loop ((x exp)) |
67169b29 AW |
164 | (cond |
165 | ((list? x) | |
166 | (push-call! #f 'mark '()) | |
167 | (for-each loop x) | |
168 | (push-call! #f 'list-mark '())) | |
169 | ((pair? x) | |
170 | (loop (car x)) | |
171 | (loop (cdr x)) | |
172 | (push-code! (make-glil-call 'cons 2))) | |
173 | ((record? x) | |
174 | (record-case x | |
175 | ((<ghil-unquote> env loc exp) | |
176 | (comp-push exp)) | |
177 | ((<ghil-unquote-splicing> env loc exp) | |
178 | (comp-push exp) | |
179 | (push-call! #f 'list-break '())))) | |
180 | (else | |
10be7025 | 181 | (push-code! (make-glil-const #:obj x))))) |
cb4cca12 KN |
182 | (maybe-drop) |
183 | (maybe-return)) | |
17e90c5e | 184 | |
67169b29 | 185 | ((<ghil-ref> env loc var) |
17e90c5e KN |
186 | (return-code! (make-glil-var 'ref env var))) |
187 | ||
67169b29 | 188 | ((<ghil-set> env loc var val) |
ac99cb0c KN |
189 | (comp-push val) |
190 | (push-code! (make-glil-var 'set env var)) | |
191 | (return-void!)) | |
192 | ||
67169b29 | 193 | ((<ghil-define> env loc var val) |
17e90c5e | 194 | (comp-push val) |
cd9d95d7 | 195 | (push-code! (make-glil-var 'define env var)) |
17e90c5e KN |
196 | (return-void!)) |
197 | ||
67169b29 | 198 | ((<ghil-if> env loc test then else) |
17e90c5e KN |
199 | ;; TEST |
200 | ;; (br-if-not L1) | |
201 | ;; THEN | |
41f248a8 | 202 | ;; (br L2) |
17e90c5e KN |
203 | ;; L1: ELSE |
204 | ;; L2: | |
205 | (let ((L1 (make-label)) (L2 (make-label))) | |
206 | (comp-push test) | |
cb4cca12 | 207 | (push-branch! 'br-if-not L1) |
17e90c5e | 208 | (comp-tail then) |
cb4cca12 KN |
209 | (if (not tail) (push-branch! 'br L2)) |
210 | (push-label! L1) | |
17e90c5e | 211 | (comp-tail else) |
cb4cca12 KN |
212 | (if (not tail) (push-label! L2)))) |
213 | ||
67169b29 | 214 | ((<ghil-and> env loc exps) |
cb4cca12 KN |
215 | ;; EXP |
216 | ;; (br-if-not L1) | |
217 | ;; ... | |
218 | ;; TAIL | |
219 | ;; (br L2) | |
220 | ;; L1: (const #f) | |
221 | ;; L2: | |
222 | (let ((L1 (make-label)) (L2 (make-label))) | |
223 | (if (null? exps) | |
224 | (return-object! #t) | |
225 | (do ((exps exps (cdr exps))) | |
226 | ((null? (cdr exps)) | |
227 | (comp-tail (car exps)) | |
228 | (if (not tail) (push-branch! 'br L2)) | |
229 | (push-label! L1) | |
230 | (return-object! #f) | |
231 | (if (not tail) (push-label! L2)) | |
232 | (maybe-drop) | |
233 | (maybe-return)) | |
234 | (comp-push (car exps)) | |
235 | (push-branch! 'br-if-not L1))))) | |
236 | ||
67169b29 | 237 | ((<ghil-or> env loc exps) |
cb4cca12 KN |
238 | ;; EXP |
239 | ;; (dup) | |
240 | ;; (br-if L1) | |
241 | ;; (drop) | |
242 | ;; ... | |
243 | ;; TAIL | |
244 | ;; L1: | |
245 | (let ((L1 (make-label))) | |
246 | (if (null? exps) | |
247 | (return-object! #f) | |
248 | (do ((exps exps (cdr exps))) | |
249 | ((null? (cdr exps)) | |
250 | (comp-tail (car exps)) | |
251 | (push-label! L1) | |
252 | (maybe-drop) | |
253 | (maybe-return)) | |
254 | (comp-push (car exps)) | |
ac99cb0c | 255 | (push-call! #f 'dup '()) |
cb4cca12 | 256 | (push-branch! 'br-if L1) |
ac99cb0c | 257 | (push-call! #f 'drop '()))))) |
17e90c5e | 258 | |
67169b29 | 259 | ((<ghil-begin> env loc exps) |
17e90c5e KN |
260 | ;; EXPS... |
261 | ;; TAIL | |
262 | (if (null? exps) | |
263 | (return-void!) | |
264 | (do ((exps exps (cdr exps))) | |
265 | ((null? (cdr exps)) | |
266 | (comp-tail (car exps))) | |
267 | (comp-drop (car exps))))) | |
268 | ||
67169b29 | 269 | ((<ghil-bind> env loc vars vals body) |
17e90c5e KN |
270 | ;; VALS... |
271 | ;; (set VARS)... | |
272 | ;; BODY | |
273 | (for-each comp-push vals) | |
aa0a011b | 274 | (push-bindings! vars) |
a6df585a KN |
275 | (for-each (lambda (var) (push-code! (make-glil-var 'set env var))) |
276 | (reverse vars)) | |
ac99cb0c | 277 | (comp-tail body) |
849cefac | 278 | (push-code! (make-glil-unbind))) |
17e90c5e | 279 | |
67169b29 | 280 | ((<ghil-lambda> env loc vars rest body) |
17e90c5e KN |
281 | (return-code! (codegen tree))) |
282 | ||
f540e327 | 283 | ((<ghil-inline> env loc inline args) |
46cd9a34 KN |
284 | ;; ARGS... |
285 | ;; (INST NARGS) | |
f540e327 | 286 | (push-call! loc inline args) |
cb4cca12 KN |
287 | (maybe-drop) |
288 | (maybe-return)) | |
46cd9a34 | 289 | |
67169b29 | 290 | ((<ghil-call> env loc proc args) |
17e90c5e | 291 | ;; PROC |
3616e9e9 | 292 | ;; ARGS... |
17e90c5e | 293 | ;; ([tail-]call NARGS) |
17e90c5e | 294 | (comp-push proc) |
ac99cb0c | 295 | (push-call! loc (if tail 'tail-call 'call) args) |
cb4cca12 | 296 | (maybe-drop)))) |
17e90c5e KN |
297 | ;; |
298 | ;; main | |
67169b29 | 299 | (record-case ghil |
f540e327 AW |
300 | ((<ghil-lambda> env loc vars rest body) |
301 | (let* ((evars (ghil-env-variables env)) | |
302 | (locs (pick (lambda (v) (eq? (ghil-var-kind v) 'local)) evars)) | |
303 | (exts (pick (lambda (v) (eq? (ghil-var-kind v) 'external)) evars))) | |
17e90c5e | 304 | ;; initialize variable indexes |
f540e327 | 305 | (finalize-index! vars) |
17e90c5e KN |
306 | (finalize-index! locs) |
307 | (finalize-index! exts) | |
ac99cb0c | 308 | ;; meta bindings |
f540e327 | 309 | (push-bindings! vars) |
17e90c5e | 310 | ;; export arguments |
061f7fae | 311 | (do ((n 0 (1+ n)) |
f540e327 | 312 | (l vars (cdr l))) |
17e90c5e KN |
313 | ((null? l)) |
314 | (let ((v (car l))) | |
aa0a011b AW |
315 | (case (ghil-var-kind v) |
316 | ((external) | |
317 | (push-code! (make-glil-argument 'ref n)) | |
318 | (push-code! (make-glil-external 'set 0 (ghil-var-index v))))))) | |
17e90c5e KN |
319 | ;; compile body |
320 | (comp body #t #f) | |
321 | ;; create GLIL | |
f540e327 | 322 | (let ((vars (make-glil-vars :nargs (length vars) |
849cefac AW |
323 | :nrest (if rest 1 0) |
324 | :nlocs (length locs) | |
325 | :nexts (length exts)))) | |
326 | (make-glil-asm vars (reverse! stack)))))))) | |
17e90c5e KN |
327 | |
328 | (define (finalize-index! list) | |
329 | (do ((n 0 (1+ n)) | |
330 | (l list (cdr l))) | |
331 | ((null? l)) | |
aa0a011b | 332 | (let ((v (car l))) (set! (ghil-var-index v) n)))) |