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ragge
1.34
1 /*      $Id: local.c,v 1.34 2005/12/04 11:49:00 ragge Exp $     */
ragge
1.1
2 /*
3  * Copyright (c) 2003 Anders Magnusson (ragge@ludd.luth.se).
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28
29
30 # include "pass1.h"
31
32 /*      this file contains code which is dependent on the target machine */
33
34 NODE *
35 clocal(NODE *p)
36 {
37         /* this is called to do local transformations on
38            an expression tree preparitory to its being
39            written out in intermediate code.
40         */
41
42         /* the major essential job is rewriting the
43            automatic variables and arguments in terms of
44            REG and OREG nodes */
45         /* conversion ops which are not necessary are also clobbered here */
46         /* in addition, any special features (such as rewriting
47            exclusive or) are easily handled here as well */
48
49         register struct symtab *q;
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1.2
50         register NODE *r, *l;
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1.1
51         register int o;
52         register int mml;
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1.19
53         TWORD t;
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1.1
54
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1.24
55 //printf("in:\n");
56 //fwalk(p, eprint, 0);
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1.1
57         switcho = p->n_op ){
58
59         case NAME:
60                 if ((q = p->n_sp) == NULL)
61                         return p/* Nothing to care about */
62
63                 switch (q->sclass) {
64
65                 case PARAM:
66                 case AUTO:
67                         /* fake up a structure reference */
68                         r = block(REGNILNILPTR+STRTY00);
69                         r->n_lval = 0;
70                         r->n_rval = FPREG;
71                         p = stref(block(STREFrp000));
72                         break;
73
74                 case STATIC:
75                         if (q->slevel == 0)
76                                 break;
77                         p->n_lval = 0;
78                         p->n_sp = q;
79                         break;
80
81                 case REGISTER:
82                         p->n_op = REG;
83                         p->n_lval = 0;
84                         p->n_rval = q->soffset;
85                         break;
86
87                         }
88                 break;
89
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1.10
90         case FUNARG:
91                 /* Args smaller than int are given as int */
92                 if (p->n_type != CHAR && p->n_type != UCHAR && 
93                     p->n_type != SHORT && p->n_type != USHORT)
94                         break;
95                 p->n_left = block(SCONVp->n_leftNILINT0MKSUE(INT));
96                 p->n_type = INT;
97                 p->n_sue = MKSUE(INT);
98                 p->n_rval = SZINT;
99                 break;
100
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1.8
101         case CBRANCH:
102                 l = p->n_left;
103
104                 /*
105                  * Remove unneccessary conversion ops.
106                  */
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1.10
107                 if (clogop(l->n_op) && l->n_left->n_op == SCONV) {
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108                         if (coptype(l->n_op) != BITYPE)
109                                 break;
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1.8
110                         if (l->n_right->n_op == ICON) {
111                                 r = l->n_left->n_left;
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112                                 if (r->n_type >= FLOAT && r->n_type <= LDOUBLE)
113                                         break;
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114                                 /* Type must be correct */
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115                                 t = r->n_type;
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116                                 nfree(l->n_left);
117                                 l->n_left = r;
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118                                 l->n_type = t;
119                                 l->n_right->n_type = t;
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120                         }
121 #if 0
122                           else if (l->n_right->n_op == SCONV &&
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123                             l->n_left->n_type == l->n_right->n_type) {
124                                 r = l->n_left->n_left;
125                                 nfree(l->n_left);
126                                 l->n_left = r;
127                                 r = l->n_right->n_left;
128                                 nfree(l->n_right);
129                                 l->n_right = r;
130                         }
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131 #endif
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132                 }
133                 break;
134
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135         case PCONV:
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136                 ml = p->n_left->n_type;
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1.1
137                 l = p->n_left;
138                 if ((ml == CHAR || ml == UCHAR || ml == SHORT || ml == USHORT)
139                     && l->n_op != ICON)
140                         break;
141                 l->n_type = p->n_type;
142                 l->n_qual = p->n_qual;
143                 l->n_df = p->n_df;
144                 l->n_sue = p->n_sue;
145                 nfree(p);
146                 p = l;
147                 break;
148
149         case SCONV:
150                 l = p->n_left;
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151
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152                 if (p->n_type == l->n_type) {
153                         nfree(p);
154                         return l;
155                 }
156
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1.4
157                 if ((p->n_type & TMASK) == 0 && (l->n_type & TMASK) == 0 &&
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1.30
158                     btdims[p->n_type].suesize == btdims[l->n_type].suesize) {
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159                         if (p->n_type != FLOAT && p->n_type != DOUBLE &&
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160                             l->n_type != FLOAT && l->n_type != DOUBLE &&
161                             l->n_type != LDOUBLE && p->n_type != LDOUBLE) {
162                                 if (l->n_op == NAME || l->n_op == UMUL) {
163                                         l->n_type = p->n_type;
164                                         nfree(p);
165                                         return l;
166                                 }
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167                         }
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168                 }
169
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170 #if 0
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1.6
171                 if ((p->n_type == INT || p->n_type == UNSIGNED) &&
172                     ISPTR(l->n_type)) {
173                         nfree(p);
174                         return l;
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175                 }
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176 #endif
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177
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1.3
178                 o = l->n_op;
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179                 m = p->n_type;
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180
181                 if (o == ICON) {
182                         CONSZ val = l->n_lval;
183
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1.29
184                         if (!ISPTR(m)) /* Pointers don't need to be conv'd */
185                             switch (m) {
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1.1
186                         case CHAR:
187                                 l->n_lval = (char)val;
188                                 break;
189                         case UCHAR:
190                                 l->n_lval = val & 0377;
191                                 break;
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1.15
192                         case SHORT:
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1.1
193                                 l->n_lval = (short)val;
194                                 break;
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1.15
195                         case USHORT:
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1.1
196                                 l->n_lval = val & 0177777;
197                                 break;
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1.15
198                         case ULONG:
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1.1
199                         case UNSIGNED:
200                                 l->n_lval = val & 0xffffffff;
201                                 break;
202                         case ENUMTY:
203                         case MOETY:
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1.15
204                         case LONG:
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1.1
205                         case INT:
206                                 l->n_lval = (int)val;
207                                 break;
208                         case LONGLONG:
209                                 l->n_lval = (long long)val;
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1.15
210                                 break;
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1.1
211                         case ULONGLONG:
212                                 l->n_lval = val;
213                                 break;
214                         case VOID:
215                                 break;
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1.14
216                         case LDOUBLE:
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1.1
217                         case DOUBLE:
218                         case FLOAT:
219                                 l->n_op = FCON;
220                                 l->n_dcon = val;
221                                 break;
222                         default:
223                                 cerror("unknown type %d"m);
224                         }
225                         l->n_type = m;
226                         nfree(p);
227                         return l;
228                 }
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1.17
229                 if (DEUNSIGN(p->n_type) == SHORT &&
230                     DEUNSIGN(l->n_type) == SHORT) {
231                         nfree(p);
232                         p = l;
233                 }
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1.1
234                 break;
235
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1.15
236         case MOD:
237         case DIV:
238                 if (o == DIV && p->n_type != CHAR && p->n_type != SHORT)
239                         break;
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1.16
240                 if (o == MOD && p->n_type != CHAR && p->n_type != SHORT)
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1.15
241                         break;
242                 /* make it an int division by inserting conversions */
243                 p->n_left = block(SCONVp->n_leftNILINT0MKSUE(INT));
244                 p->n_right = block(SCONVp->n_rightNILINT0MKSUE(INT));
245                 p = block(SCONVpNILp->n_type0MKSUE(p->n_type));
246                 p->n_left->n_type = INT;
247                 break;
248
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1.1
249         case PMCONV:
250         case PVCONV:
251                 ifp->n_right->n_op != ICON ) cerror"bad conversion"0);
252                 nfree(p);
253                 return(buildtree(o==PMCONV?MUL:DIVp->n_leftp->n_right));
254
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1.31
255         case FORCE:
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1.32
256                 /* put return value in return reg */
257                 p->n_op = ASSIGN;
258                 p->n_right = p->n_left;
259                 p->n_left = block(REGNILNILp->n_type0MKSUE(INT));
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1.31
260                 break;
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1.1
261         }
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1.24
262 //printf("ut:\n");
263 //fwalk(p, eprint, 0);
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1.1
264
265         return(p);
266 }
267
268 void
269 myp2tree(NODE *p)
270 {
271 }
272
273 /*ARGSUSED*/
274 int
275 andable(NODE *p)
276 {
277         return(1);  /* all names can have & taken on them */
278 }
279
280 /*
281  * at the end of the arguments of a ftn, set the automatic offset
282  */
283 void
284 cendarg()
285 {
286         autooff = AUTOINIT;
287 }
288
289 /*
290  * return a node, for structure references, which is suitable for
291  * being added to a pointer of type t, in order to be off bits offset
292  * into a structure
293  * t, d, and s are the type, dimension offset, and sizeoffset
294  * For pdp10, return the type-specific index number which calculation
295  * is based on its size. For example, short a[3] would return 3.
296  * Be careful about only handling first-level pointers, the following
297  * indirections must be fullword.
298  */
299 NODE *
300 offcon(OFFSZ offTWORD tunion dimfun *dstruct suedef *sue)
301 {
302         register NODE *p;
303
304         if (xdebug)
305                 printf("offcon: OFFSZ %lld type %x dim %p siz %d\n",
306                     offtdsue->suesize);
307
308         p = bcon(0);
309         p->n_lval = off/SZCHAR/* Default */
310         return(p);
311 }
312
313 /*
314  * Allocate off bits on the stack.  p is a tree that when evaluated
315  * is the multiply count for off, t is a NAME node where to write
316  * the allocated address.
317  */
318 void
319 spalloc(NODE *tNODE *pOFFSZ off)
320 {
321         NODE *sp;
322
323         if ((off % SZINT) == 0)
324                 p =  buildtree(MULpbcon(off/SZINT));
325         else if ((off % SZSHORT) == 0) {
326                 p = buildtree(MULpbcon(off/SZSHORT));
327                 p = buildtree(PLUSpbcon(1));
328                 p = buildtree(RSpbcon(1));
329         } else if ((off % SZCHAR) == 0) {
330                 p = buildtree(MULpbcon(off/SZCHAR));
331                 p = buildtree(PLUSpbcon(3));
332                 p = buildtree(RSpbcon(2));
333         } else
334                 cerror("roundsp");
335
336         /* save the address of sp */
337         sp = block(REGNILNILPTR+INTt->n_dft->n_sue);
338         sp->n_lval = 0;
339         sp->n_rval = STKREG;
340         t->n_type = sp->n_type;
341         ecomp(buildtree(ASSIGNtsp)); /* Emit! */
342
343         /* add the size to sp */
344         sp = block(REGNILNILp->n_type00);
345         sp->n_lval = 0;
346         sp->n_rval = STKREG;
347         ecomp(buildtree(PLUSEQspp));
348 }
349
350 /*
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1.21
351  * print out a constant node
352  * mat be associated with a label
353  */
354 void
355 ninval(NODE *p)
356 {
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1.24
357         struct symtab *q;
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1.23
358         TWORD t;
359
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1.21
360         p = p->n_left;
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1.23
361         t = p->n_type;
362         if (t > BTMASK)
363                 t = INT/* pointer */
364
365         switch (t) {
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1.21
366         case LONGLONG:
367         case ULONGLONG:
368                 inval(p->n_lval & 0xffffffff);
369                 inval(p->n_lval >> 32);
370                 break;
371         case INT:
372         case UNSIGNED:
373                 printf("\t.long 0x%x", (int)p->n_lval);
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1.24
374                 if ((q = p->n_sp) != NULL) {
375                         if ((q->sclass == STATIC && q->slevel > 0) ||
376                             q->sclass == ILABEL) {
377                                 printf("+" LABFMTq->soffset);
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1.21
378                         } else
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1.24
379                                 printf("+%s"exname(q->sname));
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1.21
380                 }
381                 printf("\n");
382                 break;
383         default:
384                 cerror("ninval");
385         }
386 }
387
388 /*
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1.17
389  * print out an integer.
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1.1
390  */
391 void
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1.17
392 inval(CONSZ word)
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1.1
393 {
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1.17
394         word &= 0xffffffff;
395         printf("        .long 0x%llx\n"word);
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1.1
396 }
397
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1.17
398 /* output code to initialize a floating point value */
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1.1
399 /* the proper alignment has been obtained */
400 void
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1.17
401 finval(NODE *p)
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1.1
402 {
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1.17
403         switch (p->n_type) {
404         case LDOUBLE:
405                 printf("\t.tfloat\t0t%.20Le\n"p->n_dcon);
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1.14
406                 break;
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1.17
407         case DOUBLE:
408                 printf("\t.dfloat\t0d%.20e\n", (double)p->n_dcon);
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1.14
409                 break;
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1.17
410         case FLOAT:
411                 printf("\t.ffloat\t0f%.20e\n", (float)p->n_dcon);
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1.14
412                 break;
413         }
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1.1
414 }
415
416 /* make a name look like an external name in the local machine */
417 char *
418 exname(char *p)
419 {
420         if (p == NULL)
421                 return "";
422         return p;
423 }
424
425 /*
426  * map types which are not defined on the local machine
427  */
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1.15
428 TWORD
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1.1
429 ctype(TWORD type)
430 {
431         switch (BTYPE(type)) {
432         case LONG:
433                 MODTYPE(type,INT);
434                 break;
435
436         case ULONG:
437                 MODTYPE(type,UNSIGNED);
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1.13
438
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1.1
439         }
440         return (type);
441 }
442
443 /* curid is a variable which is defined but
444  * is not initialized (and not a function );
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1.17
445  * This routine returns the storage class for an uninitialized declaration
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1.1
446  */
447 int
448 noinit()
449 {
450         return(EXTERN);
451 }
452
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1.30
453 void
454 calldec(NODE *pNODE *q
455 {
456 }
457
458 void
459 extdec(struct symtab *q)
460 {
461 }
462
ragge
1.1
463 /* make a common declaration for id, if reasonable */
464 void
465 commdec(struct symtab *q)
466 {
467         int off;
468
469         off = tsize(q->stypeq->sdfq->ssue);
ragge
1.8
470         off = (off+(SZCHAR-1))/SZCHAR;
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1.7
471 #ifdef GCC_COMPAT
472         printf("        .comm %s,0%o\n"gcc_findname(q), off);
473 #else
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1.1
474         printf("        .comm %s,0%o\n"exname(q->sname), off);
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1.7
475 #endif
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1.1
476 }
477
478 /* make a local common declaration for id, if reasonable */
479 void
480 lcommdec(struct symtab *q)
481 {
482         int off;
483
484         off = tsize(q->stypeq->sdfq->ssue);
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1.8
485         off = (off+(SZCHAR-1))/SZCHAR;
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1.1
486         if (q->slevel == 0)
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1.7
487 #ifdef GCC_COMPAT
488                 printf("        .lcomm %s,0%o\n"gcc_findname(q), off);
489 #else
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1.1
490                 printf("        .lcomm %s,0%o\n"exname(q->sname), off);
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1.7
491 #endif
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1.1
492         else
493                 printf("        .lcomm " LABFMT ",0%o\n"q->soffsetoff);
494 }
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1.22
495
496 /*
497  * print a (non-prog) label.
498  */
499 void
500 deflab1(int label)
501 {
502         printf(LABFMT ":\n"label);
503 }
504
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1.28
505 static char *loctbl[] = { "text""data""section .rodata""section .rodata" };
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1.27
506
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1.23
507 void
508 setloc1(int locc)
509 {
510         if (locc == lastloc)
511                 return;
512         lastloc = locc;
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1.27
513         printf("        .%s\n"loctbl[locc]);
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1.23
514 }
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Atlassian FishEye, CVS analysis. (Version:1.6.3 Build:build-336 2008-11-04) - Administration - Page generated 2014-09-20 22:03 +0200