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6e8ad823 AW |
1 | ;;; Continuation-passing style (CPS) intermediate language (IL) |
2 | ||
7ab76a83 | 3 | ;; Copyright (C) 2013, 2014 Free Software Foundation, Inc. |
6e8ad823 AW |
4 | |
5 | ;;;; This library is free software; you can redistribute it and/or | |
6 | ;;;; modify it under the terms of the GNU Lesser General Public | |
7 | ;;;; License as published by the Free Software Foundation; either | |
8 | ;;;; version 3 of the License, or (at your option) any later version. | |
9 | ;;;; | |
10 | ;;;; This library 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 GNU | |
13 | ;;;; Lesser General Public License for more details. | |
14 | ;;;; | |
15 | ;;;; You should have received a copy of the GNU Lesser General Public | |
16 | ;;;; License along with this library; if not, write to the Free Software | |
17 | ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | ||
19 | ;;; Commentary: | |
20 | ;;; | |
691697de AW |
21 | ;;; Compiling CPS to bytecode. The result is in the bytecode language, |
22 | ;;; which happens to be an ELF image as a bytecode. | |
6e8ad823 AW |
23 | ;;; |
24 | ;;; Code: | |
25 | ||
691697de | 26 | (define-module (language cps compile-bytecode) |
6e8ad823 AW |
27 | #:use-module (ice-9 match) |
28 | #:use-module (srfi srfi-1) | |
29 | #:use-module (language cps) | |
30 | #:use-module (language cps arities) | |
31 | #:use-module (language cps closure-conversion) | |
8ac8e2df | 32 | #:use-module (language cps contification) |
fa3b6e57 | 33 | #:use-module (language cps constructors) |
305cccb4 | 34 | #:use-module (language cps dce) |
6e8ad823 | 35 | #:use-module (language cps dfg) |
7e273b7a | 36 | #:use-module (language cps elide-values) |
6e8ad823 AW |
37 | #:use-module (language cps primitives) |
38 | #:use-module (language cps reify-primitives) | |
39 | #:use-module (language cps slot-allocation) | |
4c906ad5 | 40 | #:use-module (language cps specialize-primcalls) |
6e8ad823 | 41 | #:use-module (system vm assembler) |
691697de | 42 | #:export (compile-bytecode)) |
6e8ad823 | 43 | |
d258fccc | 44 | ;; TODO: Local var names. |
6e8ad823 AW |
45 | |
46 | (define (kw-arg-ref args kw default) | |
47 | (match (memq kw args) | |
48 | ((_ val . _) val) | |
49 | (_ default))) | |
50 | ||
51 | (define (optimize exp opts) | |
52 | (define (run-pass exp pass kw default) | |
53 | (if (kw-arg-ref opts kw default) | |
1d15832f | 54 | (pass exp) |
6e8ad823 AW |
55 | exp)) |
56 | ||
305cccb4 AW |
57 | ;; The first DCE pass is mainly to eliminate functions that aren't |
58 | ;; called. The last is mainly to eliminate rest parameters that | |
59 | ;; aren't used, and thus shouldn't be consed. | |
60 | ||
61 | (let* ((exp (run-pass exp eliminate-dead-code #:eliminate-dead-code? #t)) | |
62 | (exp (run-pass exp contify #:contify? #t)) | |
7e273b7a | 63 | (exp (run-pass exp inline-constructors #:inline-constructors? #t)) |
4c906ad5 | 64 | (exp (run-pass exp specialize-primcalls #:specialize-primcalls? #t)) |
305cccb4 AW |
65 | (exp (run-pass exp elide-values #:elide-values? #t)) |
66 | (exp (run-pass exp eliminate-dead-code #:eliminate-dead-code? #t))) | |
6e8ad823 AW |
67 | ;; Passes that are needed: |
68 | ;; | |
6e8ad823 AW |
69 | ;; * Abort contification: turning abort primcalls into continuation |
70 | ;; calls, and eliding prompts if possible. | |
71 | ;; | |
72 | ;; * Common subexpression elimination. Desperately needed. Requires | |
73 | ;; effects analysis. | |
74 | ;; | |
75 | ;; * Loop peeling. Unrolls the first round through a loop if the | |
76 | ;; loop has effects that CSE can work on. Requires effects | |
77 | ;; analysis. When run before CSE, loop peeling is the equivalent | |
78 | ;; of loop-invariant code motion (LICM). | |
79 | ;; | |
80 | ;; * Generic simplification pass, to be run as needed. Used to | |
81 | ;; "clean up", both on the original raw input and after specific | |
82 | ;; optimization passes. | |
83 | ||
84 | exp)) | |
85 | ||
d258fccc | 86 | (define (collect-conts f cfa) |
6e422a35 | 87 | (let ((contv (make-vector (cfa-k-count cfa) #f))) |
d258fccc | 88 | (fold-local-conts |
6e422a35 | 89 | (lambda (k cont tail) |
d258fccc AW |
90 | (let ((idx (cfa-k-idx cfa k #:default (lambda (k) #f)))) |
91 | (when idx | |
d258fccc AW |
92 | (vector-set! contv idx cont)))) |
93 | '() | |
94 | (match f | |
6e422a35 | 95 | (($ $fun src meta free entry) |
d258fccc | 96 | entry))) |
6e422a35 | 97 | contv)) |
d258fccc AW |
98 | |
99 | (define (compile-fun f asm) | |
100 | (let* ((dfg (compute-dfg f #:global? #f)) | |
101 | (cfa (analyze-control-flow f dfg)) | |
6e422a35 AW |
102 | (allocation (allocate-slots f dfg)) |
103 | (contv (collect-conts f cfa))) | |
104 | (define (lookup-cont k) | |
105 | (vector-ref contv (cfa-k-idx cfa k))) | |
106 | ||
987c1f5f AW |
107 | (define (maybe-slot sym) |
108 | (lookup-maybe-slot sym allocation)) | |
109 | ||
6e422a35 AW |
110 | (define (slot sym) |
111 | (lookup-slot sym allocation)) | |
112 | ||
113 | (define (constant sym) | |
114 | (lookup-constant-value sym allocation)) | |
115 | ||
116 | (define (maybe-mov dst src) | |
117 | (unless (= dst src) | |
118 | (emit-mov asm dst src))) | |
119 | ||
120 | (define (maybe-load-constant slot src) | |
121 | (call-with-values (lambda () | |
122 | (lookup-maybe-constant-value src allocation)) | |
123 | (lambda (has-const? val) | |
124 | (and has-const? | |
125 | (begin | |
126 | (emit-load-constant asm slot val) | |
127 | #t))))) | |
128 | ||
129 | (define (compile-entry meta) | |
130 | (match (vector-ref contv 0) | |
131 | (($ $kentry self tail clauses) | |
132 | (emit-begin-program asm (cfa-k-sym cfa 0) meta) | |
133 | (let lp ((n 1) | |
134 | (ks (map (match-lambda (($ $cont k) k)) clauses))) | |
135 | (match ks | |
136 | (() | |
137 | (unless (= n (vector-length contv)) | |
138 | (error "unexpected end of clauses")) | |
139 | (emit-end-program asm)) | |
140 | ((k . ks) | |
141 | (unless (eq? (cfa-k-sym cfa n) k) | |
142 | (error "unexpected k" k)) | |
143 | (lp (compile-clause n (and (pair? ks) (car ks))) | |
144 | ks))))))) | |
145 | ||
146 | (define (compile-clause n alternate) | |
147 | (match (vector-ref contv n) | |
148 | (($ $kclause ($ $arity req opt rest kw allow-other-keys?)) | |
149 | (let* ((kw-indices (map (match-lambda | |
150 | ((key name sym) | |
151 | (cons key (lookup-slot sym allocation)))) | |
152 | kw)) | |
153 | (k (cfa-k-sym cfa n)) | |
154 | (nlocals (lookup-nlocals k allocation))) | |
155 | (emit-label asm k) | |
156 | (emit-begin-kw-arity asm req opt rest kw-indices | |
157 | allow-other-keys? nlocals alternate) | |
158 | (let ((next (compile-body (1+ n) nlocals))) | |
159 | (emit-end-arity asm) | |
160 | next))))) | |
161 | ||
162 | (define (compile-body n nlocals) | |
163 | (let compile-cont ((n n)) | |
164 | (if (= n (vector-length contv)) | |
165 | n | |
166 | (match (vector-ref contv n) | |
167 | (($ $kclause) n) | |
168 | (($ $kargs _ _ term) | |
169 | (emit-label asm (cfa-k-sym cfa n)) | |
170 | (let find-exp ((term term)) | |
171 | (match term | |
172 | (($ $letk conts term) | |
173 | (find-exp term)) | |
174 | (($ $continue k src exp) | |
175 | (when src | |
176 | (emit-source asm src)) | |
177 | (compile-expression n k exp nlocals) | |
178 | (compile-cont (1+ n)))))) | |
179 | (_ | |
180 | (emit-label asm (cfa-k-sym cfa n)) | |
181 | (compile-cont (1+ n))))))) | |
182 | ||
183 | (define (compile-expression n k exp nlocals) | |
184 | (let* ((label (cfa-k-sym cfa n)) | |
185 | (k-idx (cfa-k-idx cfa k)) | |
186 | (fallthrough? (= k-idx (1+ n)))) | |
187 | (define (maybe-emit-jump) | |
188 | (unless (= k-idx (1+ n)) | |
189 | (emit-br asm k))) | |
190 | (match (vector-ref contv k-idx) | |
191 | (($ $ktail) | |
192 | (compile-tail label exp)) | |
193 | (($ $kargs (name) (sym)) | |
987c1f5f | 194 | (let ((dst (maybe-slot sym))) |
6e422a35 AW |
195 | (when dst |
196 | (compile-value label exp dst nlocals))) | |
197 | (maybe-emit-jump)) | |
198 | (($ $kargs () ()) | |
199 | (compile-effect label exp k nlocals) | |
200 | (maybe-emit-jump)) | |
201 | (($ $kargs names syms) | |
202 | (compile-values label exp syms) | |
203 | (maybe-emit-jump)) | |
204 | (($ $kif kt kf) | |
205 | (compile-test label exp kt kf | |
206 | (and (= k-idx (1+ n)) | |
207 | (< (+ n 2) (cfa-k-count cfa)) | |
208 | (cfa-k-sym cfa (+ n 2))))) | |
987c1f5f | 209 | (($ $ktrunc ($ $arity req () rest () #f) kargs) |
fa48a2f7 AW |
210 | (compile-trunc label k exp (length req) |
211 | (and rest | |
212 | (match (vector-ref contv (cfa-k-idx cfa kargs)) | |
213 | (($ $kargs names (_ ... rest)) rest))) | |
214 | nlocals) | |
6e422a35 AW |
215 | (unless (and (= k-idx (1+ n)) |
216 | (< (+ n 2) (cfa-k-count cfa)) | |
987c1f5f AW |
217 | (eq? (cfa-k-sym cfa (+ n 2)) kargs)) |
218 | (emit-br asm kargs)))))) | |
6e422a35 AW |
219 | |
220 | (define (compile-tail label exp) | |
221 | ;; There are only three kinds of expressions in tail position: | |
222 | ;; tail calls, multiple-value returns, and single-value returns. | |
223 | (match exp | |
224 | (($ $call proc args) | |
225 | (for-each (match-lambda | |
226 | ((src . dst) (emit-mov asm dst src))) | |
227 | (lookup-parallel-moves label allocation)) | |
228 | (let ((tail-slots (cdr (iota (1+ (length args)))))) | |
229 | (for-each maybe-load-constant tail-slots args)) | |
230 | (emit-tail-call asm (1+ (length args)))) | |
987c1f5f AW |
231 | (($ $values ()) |
232 | (emit-reset-frame asm 1) | |
233 | (emit-return-values asm)) | |
13085a82 | 234 | (($ $values (arg)) |
987c1f5f | 235 | (if (maybe-slot arg) |
13085a82 AW |
236 | (emit-return asm (slot arg)) |
237 | (begin | |
238 | (emit-load-constant asm 1 (constant arg)) | |
239 | (emit-return asm 1)))) | |
6e422a35 | 240 | (($ $values args) |
13085a82 AW |
241 | (for-each (match-lambda |
242 | ((src . dst) (emit-mov asm dst src))) | |
243 | (lookup-parallel-moves label allocation)) | |
6e422a35 | 244 | (let ((tail-slots (cdr (iota (1+ (length args)))))) |
6e422a35 AW |
245 | (for-each maybe-load-constant tail-slots args)) |
246 | (emit-reset-frame asm (1+ (length args))) | |
247 | (emit-return-values asm)) | |
248 | (($ $primcall 'return (arg)) | |
249 | (emit-return asm (slot arg))))) | |
250 | ||
251 | (define (compile-value label exp dst nlocals) | |
252 | (match exp | |
6e422a35 AW |
253 | (($ $values (arg)) |
254 | (or (maybe-load-constant dst arg) | |
255 | (maybe-mov dst (slot arg)))) | |
256 | (($ $void) | |
257 | (emit-load-constant asm dst *unspecified*)) | |
258 | (($ $const exp) | |
259 | (emit-load-constant asm dst exp)) | |
260 | (($ $fun src meta () ($ $cont k)) | |
261 | (emit-load-static-procedure asm dst k)) | |
262 | (($ $fun src meta free ($ $cont k)) | |
263 | (emit-make-closure asm dst k (length free))) | |
264 | (($ $call proc args) | |
987c1f5f AW |
265 | (let* ((proc-slot (lookup-call-proc-slot label allocation)) |
266 | (nargs (1+ (length args))) | |
267 | (arg-slots (map (lambda (x) (+ x proc-slot)) (iota nargs)))) | |
268 | (for-each (match-lambda | |
269 | ((src . dst) (emit-mov asm dst src))) | |
270 | (lookup-parallel-moves label allocation)) | |
271 | (for-each maybe-load-constant arg-slots (cons proc args)) | |
272 | (emit-call asm proc-slot nargs) | |
fa48a2f7 AW |
273 | (cond |
274 | (dst | |
275 | (emit-receive asm dst proc-slot nlocals)) | |
276 | (else | |
277 | ;; FIXME: Only allow more values if there is a rest arg. | |
278 | ;; Express values truncation by the presence of an | |
279 | ;; unused rest arg instead of implicitly. | |
280 | (emit-receive-values asm proc-slot #t 1) | |
281 | (emit-reset-frame asm nlocals))))) | |
6e422a35 AW |
282 | (($ $primcall 'current-module) |
283 | (emit-current-module asm dst)) | |
284 | (($ $primcall 'cached-toplevel-box (scope name bound?)) | |
285 | (emit-cached-toplevel-box asm dst (constant scope) (constant name) | |
286 | (constant bound?))) | |
287 | (($ $primcall 'cached-module-box (mod name public? bound?)) | |
288 | (emit-cached-module-box asm dst (constant mod) (constant name) | |
289 | (constant public?) (constant bound?))) | |
290 | (($ $primcall 'resolve (name bound?)) | |
291 | (emit-resolve asm dst (constant bound?) (slot name))) | |
292 | (($ $primcall 'free-ref (closure idx)) | |
293 | (emit-free-ref asm dst (slot closure) (constant idx))) | |
6e422a35 | 294 | (($ $primcall 'vector-ref (vector index)) |
4c906ad5 AW |
295 | (emit-vector-ref asm dst (slot vector) (slot index))) |
296 | (($ $primcall 'make-vector/immediate (length init)) | |
297 | (emit-make-vector/immediate asm dst (constant length) (slot init))) | |
298 | (($ $primcall 'vector-ref/immediate (vector index)) | |
299 | (emit-vector-ref/immediate asm dst (slot vector) (constant index))) | |
300 | (($ $primcall 'allocate-struct/immediate (vtable nfields)) | |
301 | (emit-allocate-struct/immediate asm dst (slot vtable) (constant nfields))) | |
302 | (($ $primcall 'struct-ref/immediate (struct n)) | |
303 | (emit-struct-ref/immediate asm dst (slot struct) (constant n))) | |
6e422a35 AW |
304 | (($ $primcall 'builtin-ref (name)) |
305 | (emit-builtin-ref asm dst (constant name))) | |
306 | (($ $primcall 'bv-u8-ref (bv idx)) | |
307 | (emit-bv-u8-ref asm dst (slot bv) (slot idx))) | |
d59060ce AW |
308 | (($ $primcall 'bv-s8-ref (bv idx)) |
309 | (emit-bv-s8-ref asm dst (slot bv) (slot idx))) | |
6e422a35 AW |
310 | (($ $primcall 'bv-u16-ref (bv idx)) |
311 | (emit-bv-u16-ref asm dst (slot bv) (slot idx))) | |
312 | (($ $primcall 'bv-s16-ref (bv idx)) | |
313 | (emit-bv-s16-ref asm dst (slot bv) (slot idx))) | |
314 | (($ $primcall 'bv-u32-ref (bv idx val)) | |
315 | (emit-bv-u32-ref asm dst (slot bv) (slot idx))) | |
316 | (($ $primcall 'bv-s32-ref (bv idx val)) | |
317 | (emit-bv-s32-ref asm dst (slot bv) (slot idx))) | |
318 | (($ $primcall 'bv-u64-ref (bv idx val)) | |
319 | (emit-bv-u64-ref asm dst (slot bv) (slot idx))) | |
320 | (($ $primcall 'bv-s64-ref (bv idx val)) | |
321 | (emit-bv-s64-ref asm dst (slot bv) (slot idx))) | |
322 | (($ $primcall 'bv-f32-ref (bv idx val)) | |
323 | (emit-bv-f32-ref asm dst (slot bv) (slot idx))) | |
324 | (($ $primcall 'bv-f64-ref (bv idx val)) | |
325 | (emit-bv-f64-ref asm dst (slot bv) (slot idx))) | |
326 | (($ $primcall name args) | |
327 | ;; FIXME: Inline all the cases. | |
691697de | 328 | (let ((inst (prim-instruction name))) |
6e422a35 AW |
329 | (emit-text asm `((,inst ,dst ,@(map slot args)))))))) |
330 | ||
331 | (define (compile-effect label exp k nlocals) | |
332 | (match exp | |
333 | (($ $values ()) #f) | |
7ab76a83 | 334 | (($ $prompt escape? tag handler) |
6e422a35 AW |
335 | (match (lookup-cont handler) |
336 | (($ $ktrunc ($ $arity req () rest () #f) khandler-body) | |
337 | (let ((receive-args (gensym "handler")) | |
338 | (nreq (length req)) | |
987c1f5f | 339 | (proc-slot (lookup-call-proc-slot handler allocation))) |
6e422a35 AW |
340 | (emit-prompt asm (slot tag) escape? proc-slot receive-args) |
341 | (emit-br asm k) | |
342 | (emit-label asm receive-args) | |
4dfcb360 AW |
343 | (unless (and rest (zero? nreq)) |
344 | (emit-receive-values asm proc-slot (->bool rest) nreq)) | |
fa48a2f7 AW |
345 | (when (and rest |
346 | (match (vector-ref contv (cfa-k-idx cfa khandler-body)) | |
347 | (($ $kargs names (_ ... rest)) | |
348 | (maybe-slot rest)))) | |
6e422a35 AW |
349 | (emit-bind-rest asm (+ proc-slot 1 nreq))) |
350 | (for-each (match-lambda | |
351 | ((src . dst) (emit-mov asm dst src))) | |
352 | (lookup-parallel-moves handler allocation)) | |
353 | (emit-reset-frame asm nlocals) | |
354 | (emit-br asm khandler-body))))) | |
355 | (($ $primcall 'cache-current-module! (sym scope)) | |
356 | (emit-cache-current-module! asm (slot sym) (constant scope))) | |
357 | (($ $primcall 'free-set! (closure idx value)) | |
358 | (emit-free-set! asm (slot closure) (slot value) (constant idx))) | |
359 | (($ $primcall 'box-set! (box value)) | |
360 | (emit-box-set! asm (slot box) (slot value))) | |
4c906ad5 AW |
361 | (($ $primcall 'struct-set!/immediate (struct index value)) |
362 | (emit-struct-set!/immediate asm (slot struct) (constant index) (slot value))) | |
6e422a35 | 363 | (($ $primcall 'vector-set! (vector index value)) |
4c906ad5 AW |
364 | (emit-vector-set! asm (slot vector) (slot index) (slot value))) |
365 | (($ $primcall 'vector-set!/immediate (vector index value)) | |
366 | (emit-vector-set!/immediate asm (slot vector) (constant index) | |
367 | (slot value))) | |
6e422a35 AW |
368 | (($ $primcall 'variable-set! (var val)) |
369 | (emit-box-set! asm (slot var) (slot val))) | |
370 | (($ $primcall 'set-car! (pair value)) | |
371 | (emit-set-car! asm (slot pair) (slot value))) | |
372 | (($ $primcall 'set-cdr! (pair value)) | |
373 | (emit-set-cdr! asm (slot pair) (slot value))) | |
374 | (($ $primcall 'define! (sym value)) | |
375 | (emit-define! asm (slot sym) (slot value))) | |
376 | (($ $primcall 'push-fluid (fluid val)) | |
377 | (emit-push-fluid asm (slot fluid) (slot val))) | |
378 | (($ $primcall 'pop-fluid ()) | |
379 | (emit-pop-fluid asm)) | |
380 | (($ $primcall 'wind (winder unwinder)) | |
381 | (emit-wind asm (slot winder) (slot unwinder))) | |
382 | (($ $primcall 'bv-u8-set! (bv idx val)) | |
383 | (emit-bv-u8-set! asm (slot bv) (slot idx) (slot val))) | |
d59060ce AW |
384 | (($ $primcall 'bv-s8-set! (bv idx val)) |
385 | (emit-bv-s8-set! asm (slot bv) (slot idx) (slot val))) | |
6e422a35 AW |
386 | (($ $primcall 'bv-u16-set! (bv idx val)) |
387 | (emit-bv-u16-set! asm (slot bv) (slot idx) (slot val))) | |
388 | (($ $primcall 'bv-s16-set! (bv idx val)) | |
389 | (emit-bv-s16-set! asm (slot bv) (slot idx) (slot val))) | |
390 | (($ $primcall 'bv-u32-set! (bv idx val)) | |
391 | (emit-bv-u32-set! asm (slot bv) (slot idx) (slot val))) | |
392 | (($ $primcall 'bv-s32-set! (bv idx val)) | |
393 | (emit-bv-s32-set! asm (slot bv) (slot idx) (slot val))) | |
394 | (($ $primcall 'bv-u64-set! (bv idx val)) | |
395 | (emit-bv-u64-set! asm (slot bv) (slot idx) (slot val))) | |
396 | (($ $primcall 'bv-s64-set! (bv idx val)) | |
397 | (emit-bv-s64-set! asm (slot bv) (slot idx) (slot val))) | |
398 | (($ $primcall 'bv-f32-set! (bv idx val)) | |
399 | (emit-bv-f32-set! asm (slot bv) (slot idx) (slot val))) | |
400 | (($ $primcall 'bv-f64-set! (bv idx val)) | |
401 | (emit-bv-f64-set! asm (slot bv) (slot idx) (slot val))) | |
402 | (($ $primcall 'unwind ()) | |
403 | (emit-unwind asm)))) | |
404 | ||
405 | (define (compile-values label exp syms) | |
406 | (match exp | |
407 | (($ $values args) | |
408 | (for-each (match-lambda | |
409 | ((src . dst) (emit-mov asm dst src))) | |
410 | (lookup-parallel-moves label allocation)) | |
411 | (for-each maybe-load-constant (map slot syms) args)))) | |
412 | ||
413 | (define (compile-test label exp kt kf next-label) | |
414 | (define (unary op sym) | |
415 | (cond | |
416 | ((eq? kt next-label) | |
417 | (op asm (slot sym) #t kf)) | |
418 | (else | |
419 | (op asm (slot sym) #f kt) | |
420 | (unless (eq? kf next-label) | |
421 | (emit-br asm kf))))) | |
422 | (define (binary op a b) | |
423 | (cond | |
424 | ((eq? kt next-label) | |
425 | (op asm (slot a) (slot b) #t kf)) | |
426 | (else | |
427 | (op asm (slot a) (slot b) #f kt) | |
428 | (unless (eq? kf next-label) | |
429 | (emit-br asm kf))))) | |
430 | (match exp | |
58ef5f07 AW |
431 | (($ $values (sym)) |
432 | (call-with-values (lambda () | |
433 | (lookup-maybe-constant-value sym allocation)) | |
434 | (lambda (has-const? val) | |
435 | (if has-const? | |
436 | (if val | |
437 | (unless (eq? kt next-label) | |
438 | (emit-br asm kt)) | |
439 | (unless (eq? kf next-label) | |
440 | (emit-br asm kf))) | |
441 | (unary emit-br-if-true sym))))) | |
6e422a35 AW |
442 | (($ $primcall 'null? (a)) (unary emit-br-if-null a)) |
443 | (($ $primcall 'nil? (a)) (unary emit-br-if-nil a)) | |
444 | (($ $primcall 'pair? (a)) (unary emit-br-if-pair a)) | |
445 | (($ $primcall 'struct? (a)) (unary emit-br-if-struct a)) | |
446 | (($ $primcall 'char? (a)) (unary emit-br-if-char a)) | |
447 | (($ $primcall 'symbol? (a)) (unary emit-br-if-symbol a)) | |
448 | (($ $primcall 'variable? (a)) (unary emit-br-if-variable a)) | |
449 | (($ $primcall 'vector? (a)) (unary emit-br-if-vector a)) | |
450 | (($ $primcall 'string? (a)) (unary emit-br-if-string a)) | |
451 | (($ $primcall 'bytevector? (a)) (unary emit-br-if-bytevector a)) | |
452 | ;; Add more TC7 tests here. Keep in sync with | |
453 | ;; *branching-primcall-arities* in (language cps primitives) and | |
454 | ;; the set of macro-instructions in assembly.scm. | |
455 | (($ $primcall 'eq? (a b)) (binary emit-br-if-eq a b)) | |
456 | (($ $primcall 'eqv? (a b)) (binary emit-br-if-eqv a b)) | |
457 | (($ $primcall 'equal? (a b)) (binary emit-br-if-equal a b)) | |
458 | (($ $primcall '< (a b)) (binary emit-br-if-< a b)) | |
459 | (($ $primcall '<= (a b)) (binary emit-br-if-<= a b)) | |
460 | (($ $primcall '= (a b)) (binary emit-br-if-= a b)) | |
461 | (($ $primcall '>= (a b)) (binary emit-br-if-<= b a)) | |
462 | (($ $primcall '> (a b)) (binary emit-br-if-< b a)))) | |
463 | ||
fa48a2f7 | 464 | (define (compile-trunc label k exp nreq rest-var nlocals) |
6e422a35 AW |
465 | (match exp |
466 | (($ $call proc args) | |
987c1f5f AW |
467 | (let* ((proc-slot (lookup-call-proc-slot label allocation)) |
468 | (nargs (1+ (length args))) | |
469 | (arg-slots (map (lambda (x) (+ x proc-slot)) (iota nargs)))) | |
470 | (for-each (match-lambda | |
471 | ((src . dst) (emit-mov asm dst src))) | |
472 | (lookup-parallel-moves label allocation)) | |
473 | (for-each maybe-load-constant arg-slots (cons proc args)) | |
474 | (emit-call asm proc-slot nargs) | |
e4fa7d40 AW |
475 | (cond |
476 | ((and (= 1 nreq) (and rest-var) (not (maybe-slot rest-var)) | |
477 | (match (lookup-parallel-moves k allocation) | |
478 | ((((? (lambda (src) (= src (1+ proc-slot))) src) | |
479 | . dst)) dst) | |
480 | (_ #f))) | |
481 | ;; The usual case: one required live return value, ignoring | |
482 | ;; any additional values. | |
483 | => (lambda (dst) | |
484 | (emit-receive asm dst proc-slot nlocals))) | |
485 | (else | |
486 | ;; FIXME: Only allow more values if there is a rest arg. | |
487 | ;; Express values truncation by the presence of an unused | |
488 | ;; rest arg instead of implicitly. | |
489 | (unless (zero? nreq) | |
490 | (emit-receive-values asm proc-slot #t nreq)) | |
491 | (when (and rest-var (maybe-slot rest-var)) | |
492 | (emit-bind-rest asm (+ proc-slot 1 nreq))) | |
493 | (for-each (match-lambda | |
494 | ((src . dst) (emit-mov asm dst src))) | |
495 | (lookup-parallel-moves k allocation)) | |
496 | (emit-reset-frame asm nlocals))))))) | |
6e422a35 AW |
497 | |
498 | (match f | |
499 | (($ $fun src meta free ($ $cont k ($ $kentry self tail clauses))) | |
500 | ;; FIXME: src on kentry instead? | |
501 | (when src | |
502 | (emit-source asm src)) | |
503 | (compile-entry (or meta '())))))) | |
d258fccc | 504 | |
6e8ad823 AW |
505 | (define (visit-funs proc exp) |
506 | (match exp | |
6e422a35 | 507 | (($ $continue _ _ exp) |
6e8ad823 AW |
508 | (visit-funs proc exp)) |
509 | ||
6e422a35 | 510 | (($ $fun src meta free body) |
6e8ad823 AW |
511 | (proc exp) |
512 | (visit-funs proc body)) | |
513 | ||
514 | (($ $letk conts body) | |
515 | (visit-funs proc body) | |
516 | (for-each (lambda (cont) (visit-funs proc cont)) conts)) | |
517 | ||
6e422a35 | 518 | (($ $cont sym ($ $kargs names syms body)) |
6e8ad823 AW |
519 | (visit-funs proc body)) |
520 | ||
6e422a35 | 521 | (($ $cont sym ($ $kclause arity body)) |
6e8ad823 AW |
522 | (visit-funs proc body)) |
523 | ||
6e422a35 | 524 | (($ $cont sym ($ $kentry self tail clauses)) |
6e8ad823 AW |
525 | (for-each (lambda (clause) (visit-funs proc clause)) clauses)) |
526 | ||
527 | (_ (values)))) | |
528 | ||
691697de | 529 | (define (compile-bytecode exp env opts) |
6e8ad823 AW |
530 | (let* ((exp (fix-arities exp)) |
531 | (exp (optimize exp opts)) | |
532 | (exp (convert-closures exp)) | |
533 | (exp (reify-primitives exp)) | |
534 | (asm (make-assembler))) | |
535 | (visit-funs (lambda (fun) | |
536 | (compile-fun fun asm)) | |
537 | exp) | |
538 | (values (link-assembly asm #:page-aligned? (kw-arg-ref opts #:to-file? #f)) | |
539 | env | |
540 | env))) |