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1.1 ! root 1: # include "mfile1" ! 2: ! 3: /* corrections when in violation of lint */ ! 4: ! 5: /* some special actions, used in finding the type of nodes */ ! 6: # define NCVT 01 ! 7: # define PUN 02 ! 8: # define TYPL 04 ! 9: # define TYPR 010 ! 10: # define TYMATCH 040 ! 11: # define LVAL 0100 ! 12: # define CVTO 0200 ! 13: # define CVTL 0400 ! 14: # define CVTR 01000 ! 15: # define PTMATCH 02000 ! 16: # define OTHER 04000 ! 17: # define NCVTR 010000 ! 18: ! 19: /* node conventions: ! 20: ! 21: NAME: rval>0 is stab index for external ! 22: rval<0 is -inlabel number ! 23: lval is offset in bits ! 24: ICON: lval has the value ! 25: rval has the STAB index, or - label number, ! 26: if a name whose address is in the constant ! 27: rval = NONAME means no name ! 28: REG: rval is reg. identification cookie ! 29: ! 30: */ ! 31: ! 32: int bdebug = 0; ! 33: extern ddebug; ! 34: ! 35: NODE * ! 36: buildtree( o, l, r ) register NODE *l, *r; { ! 37: register NODE *p, *q; ! 38: register actions; ! 39: register opty; ! 40: register struct symtab *sp; ! 41: register NODE *lr, *ll; ! 42: int i; ! 43: extern int eprint(); ! 44: ! 45: # ifndef BUG1 ! 46: if( bdebug ) printf( "buildtree( %s, %o, %o )\n", opst[o], l, r ); ! 47: # endif ! 48: opty = optype(o); ! 49: ! 50: /* check for constants */ ! 51: ! 52: if( opty == UTYPE && l->in.op == ICON ){ ! 53: ! 54: switch( o ){ ! 55: ! 56: case NOT: ! 57: if( hflag ) werror( "constant argument to NOT" ); ! 58: case UNARY MINUS: ! 59: case COMPL: ! 60: if( conval( l, o, l ) ) return(l); ! 61: break; ! 62: ! 63: } ! 64: } ! 65: ! 66: else if( o==UNARY MINUS && l->in.op==FCON ){ ! 67: l->fpn.dval = -l->fpn.dval; ! 68: return(l); ! 69: } ! 70: ! 71: else if( o==QUEST && l->in.op==ICON ) { ! 72: l->in.op = FREE; ! 73: r->in.op = FREE; ! 74: if( l->tn.lval ){ ! 75: tfree( r->in.right ); ! 76: return( r->in.left ); ! 77: } ! 78: else { ! 79: tfree( r->in.left ); ! 80: return( r->in.right ); ! 81: } ! 82: } ! 83: ! 84: else if( (o==ANDAND || o==OROR) && (l->in.op==ICON||r->in.op==ICON) ) goto ccwarn; ! 85: ! 86: else if( opty == BITYPE && l->in.op == ICON && r->in.op == ICON ){ ! 87: ! 88: switch( o ){ ! 89: ! 90: case ULT: ! 91: case UGT: ! 92: case ULE: ! 93: case UGE: ! 94: case LT: ! 95: case GT: ! 96: case LE: ! 97: case GE: ! 98: case EQ: ! 99: case NE: ! 100: case ANDAND: ! 101: case OROR: ! 102: case CBRANCH: ! 103: ! 104: ccwarn: ! 105: if( hflag ) werror( "constant in conditional context" ); ! 106: ! 107: case PLUS: ! 108: case MINUS: ! 109: case MUL: ! 110: case DIV: ! 111: case MOD: ! 112: case AND: ! 113: case OR: ! 114: case ER: ! 115: case LS: ! 116: case RS: ! 117: if( conval( l, o, r ) ) { ! 118: r->in.op = FREE; ! 119: return(l); ! 120: } ! 121: break; ! 122: } ! 123: } ! 124: ! 125: else if( opty == BITYPE && (l->in.op==FCON||l->in.op==ICON) && ! 126: (r->in.op==FCON||r->in.op==ICON) ){ ! 127: switch(o){ ! 128: case PLUS: ! 129: case MINUS: ! 130: case MUL: ! 131: case DIV: ! 132: if( l->in.op == ICON ){ ! 133: l->fpn.dval = l->tn.lval; ! 134: } ! 135: if( r->in.op == ICON ){ ! 136: r->fpn.dval = r->tn.lval; ! 137: } ! 138: l->in.op = FCON; ! 139: l->in.type = l->fn.csiz = DOUBLE; ! 140: r->in.op = FREE; ! 141: switch(o){ ! 142: case PLUS: ! 143: l->fpn.dval += r->fpn.dval; ! 144: return(l); ! 145: case MINUS: ! 146: l->fpn.dval -= r->fpn.dval; ! 147: return(l); ! 148: case MUL: ! 149: l->fpn.dval *= r->fpn.dval; ! 150: return(l); ! 151: case DIV: ! 152: if( r->fpn.dval == 0 ) uerror( "division by 0." ); ! 153: else l->fpn.dval /= r->fpn.dval; ! 154: return(l); ! 155: } ! 156: } ! 157: } ! 158: ! 159: /* its real; we must make a new node */ ! 160: ! 161: p = block( o, l, r, INT, 0, INT ); ! 162: ! 163: actions = opact(p); ! 164: ! 165: if( actions&LVAL ){ /* check left descendent */ ! 166: if( notlval(p->in.left) ) { ! 167: uerror( "illegal lhs of assignment operator" ); ! 168: } ! 169: } ! 170: ! 171: if( actions & NCVTR ){ ! 172: p->in.left = pconvert( p->in.left ); ! 173: } ! 174: else if( !(actions & NCVT ) ){ ! 175: switch( opty ){ ! 176: ! 177: case BITYPE: ! 178: p->in.right = pconvert( p->in.right ); ! 179: case UTYPE: ! 180: p->in.left = pconvert( p->in.left ); ! 181: ! 182: } ! 183: } ! 184: ! 185: if( (actions&PUN) && (o!=CAST||cflag) ){ ! 186: chkpun(p); ! 187: } ! 188: ! 189: if( actions & (TYPL|TYPR) ){ ! 190: ! 191: q = (actions&TYPL) ? p->in.left : p->in.right; ! 192: ! 193: p->in.type = q->in.type; ! 194: p->fn.cdim = q->fn.cdim; ! 195: p->fn.csiz = q->fn.csiz; ! 196: } ! 197: ! 198: if( actions & CVTL ) p = convert( p, CVTL ); ! 199: if( actions & CVTR ) p = convert( p, CVTR ); ! 200: if( actions & TYMATCH ) p = tymatch(p); ! 201: if( actions & PTMATCH ) p = ptmatch(p); ! 202: ! 203: if( actions & OTHER ){ ! 204: l = p->in.left; ! 205: r = p->in.right; ! 206: ! 207: switch(o){ ! 208: ! 209: case NAME: ! 210: sp = &stab[idname]; ! 211: if( sp->stype == UNDEF ){ ! 212: #ifndef FLEXNAMES ! 213: uerror( "%.8s undefined", sp->sname ); ! 214: #else ! 215: uerror( "%s undefined", sp->sname ); ! 216: #endif ! 217: /* make p look reasonable */ ! 218: p->in.type = p->fn.cdim = p->fn.csiz = INT; ! 219: p->tn.rval = idname; ! 220: p->tn.lval = 0; ! 221: defid( p, SNULL ); ! 222: break; ! 223: } ! 224: p->in.type = sp->stype; ! 225: p->fn.cdim = sp->dimoff; ! 226: p->fn.csiz = sp->sizoff; ! 227: p->tn.lval = 0; ! 228: p->tn.rval = idname; ! 229: /* special case: MOETY is really an ICON... */ ! 230: if( p->in.type == MOETY ){ ! 231: p->tn.rval = NONAME; ! 232: p->tn.lval = sp->offset; ! 233: p->fn.cdim = 0; ! 234: p->in.type = ENUMTY; ! 235: p->in.op = ICON; ! 236: } ! 237: break; ! 238: ! 239: case ICON: ! 240: p->in.type = INT; ! 241: p->fn.cdim = 0; ! 242: p->fn.csiz = INT; ! 243: break; ! 244: ! 245: case STRING: ! 246: p->in.op = NAME; ! 247: p->in.type = CHAR+ARY; ! 248: p->tn.lval = 0; ! 249: p->tn.rval = NOLAB; ! 250: p->fn.cdim = curdim; ! 251: p->fn.csiz = CHAR; ! 252: break; ! 253: ! 254: case FCON: ! 255: p->tn.lval = 0; ! 256: p->tn.rval = 0; ! 257: p->in.type = DOUBLE; ! 258: p->fn.cdim = 0; ! 259: p->fn.csiz = DOUBLE; ! 260: break; ! 261: ! 262: case STREF: ! 263: /* p->x turned into *(p+offset) */ ! 264: /* rhs must be a name; check correctness */ ! 265: ! 266: i = r->tn.rval; ! 267: if( i<0 || ((sp= &stab[i])->sclass != MOS && sp->sclass != MOU && !(sp->sclass&FIELD)) ){ ! 268: uerror( "member of structure or union required" ); ! 269: }else ! 270: /* if this name is non-unique, find right one */ ! 271: if( stab[i].sflags & SNONUNIQ && ! 272: (l->in.type==PTR+STRTY || l->in.type == PTR+UNIONTY) && ! 273: (l->fn.csiz +1) >= 0 ){ ! 274: /* nonunique name && structure defined */ ! 275: char * memnam, * tabnam; ! 276: register k; ! 277: int j; ! 278: int memi; ! 279: j=dimtab[l->fn.csiz+1]; ! 280: for( ; (memi=dimtab[j]) >= 0; ++j ){ ! 281: tabnam = stab[memi].sname; ! 282: memnam = stab[i].sname; ! 283: # ifndef BUG1 ! 284: if( ddebug>1 ){ ! 285: #ifndef FLEXNAMES ! 286: printf("member %.8s==%.8s?\n", ! 287: #else ! 288: printf("member %s==%s?\n", ! 289: #endif ! 290: memnam, tabnam); ! 291: } ! 292: # endif ! 293: if( stab[memi].sflags & SNONUNIQ ){ ! 294: #ifndef FLEXNAMES ! 295: for( k=0; k<NCHNAM; ++k ){ ! 296: if(*memnam++!=*tabnam) ! 297: goto next; ! 298: if(!*tabnam++) break; ! 299: } ! 300: #else ! 301: if (memnam != tabnam) ! 302: goto next; ! 303: #endif ! 304: r->tn.rval = i = memi; ! 305: break; ! 306: } ! 307: next: continue; ! 308: } ! 309: if( memi < 0 ) ! 310: #ifndef FLEXNAMES ! 311: uerror("illegal member use: %.8s", ! 312: #else ! 313: uerror("illegal member use: %s", ! 314: #endif ! 315: stab[i].sname); ! 316: } ! 317: else { ! 318: register j; ! 319: if( l->in.type != PTR+STRTY && l->in.type != PTR+UNIONTY ){ ! 320: if( stab[i].sflags & SNONUNIQ ){ ! 321: uerror( "nonunique name demands struct/union or struct/union pointer" ); ! 322: } ! 323: else werror( "struct/union or struct/union pointer required" ); ! 324: } ! 325: else if( (j=l->fn.csiz+1)<0 ) cerror( "undefined structure or union" ); ! 326: else if( !chkstr( i, dimtab[j], DECREF(l->in.type) ) ){ ! 327: #ifndef FLEXNAMES ! 328: werror( "illegal member use: %.8s", stab[i].sname ); ! 329: #else ! 330: werror( "illegal member use: %s", stab[i].sname ); ! 331: #endif ! 332: } ! 333: } ! 334: ! 335: p = stref( p ); ! 336: break; ! 337: ! 338: case UNARY MUL: ! 339: if( l->in.op == UNARY AND ){ ! 340: p->in.op = l->in.op = FREE; ! 341: p = l->in.left; ! 342: } ! 343: if( !ISPTR(l->in.type))uerror("illegal indirection"); ! 344: p->in.type = DECREF(l->in.type); ! 345: p->fn.cdim = l->fn.cdim; ! 346: p->fn.csiz = l->fn.csiz; ! 347: break; ! 348: ! 349: case UNARY AND: ! 350: switch( l->in.op ){ ! 351: ! 352: case UNARY MUL: ! 353: p->in.op = l->in.op = FREE; ! 354: p = l->in.left; ! 355: case NAME: ! 356: p->in.type = INCREF( l->in.type ); ! 357: p->fn.cdim = l->fn.cdim; ! 358: p->fn.csiz = l->fn.csiz; ! 359: break; ! 360: ! 361: case COMOP: ! 362: lr = buildtree( UNARY AND, l->in.right, NIL ); ! 363: p->in.op = l->in.op = FREE; ! 364: p = buildtree( COMOP, l->in.left, lr ); ! 365: break; ! 366: ! 367: case QUEST: ! 368: lr = buildtree( UNARY AND, l->in.right->in.right, NIL ); ! 369: ll = buildtree( UNARY AND, l->in.right->in.left, NIL ); ! 370: p->in.op = l->in.op = l->in.right->in.op = FREE; ! 371: p = buildtree( QUEST, l->in.left, buildtree( COLON, ll, lr ) ); ! 372: break; ! 373: ! 374: # ifdef ADDROREG ! 375: case OREG: ! 376: /* OREG was built in clocal() ! 377: * for an auto or formal parameter ! 378: * now its address is being taken ! 379: * local code must unwind it ! 380: * back to PLUS/MINUS REG ICON ! 381: * according to local conventions ! 382: */ ! 383: { ! 384: extern NODE * addroreg(); ! 385: p->in.op = FREE; ! 386: p = addroreg( l ); ! 387: } ! 388: break; ! 389: ! 390: # endif ! 391: default: ! 392: uerror( "unacceptable operand of &" ); ! 393: break; ! 394: } ! 395: break; ! 396: ! 397: case LS: ! 398: case RS: ! 399: case ASG LS: ! 400: case ASG RS: ! 401: if(tsize(p->in.right->in.type, p->in.right->fn.cdim, p->in.right->fn.csiz) > SZINT) ! 402: p->in.right = makety(p->in.right, INT, 0, INT ); ! 403: break; ! 404: ! 405: case RETURN: ! 406: case ASSIGN: ! 407: case CAST: ! 408: /* structure assignment */ ! 409: /* take the addresses of the two sides; then make an ! 410: /* operator using STASG and ! 411: /* the addresses of left and right */ ! 412: ! 413: { ! 414: register TWORD t; ! 415: register d, s; ! 416: ! 417: if( l->fn.csiz != r->fn.csiz ) uerror( "assignment of different structures" ); ! 418: ! 419: r = buildtree( UNARY AND, r, NIL ); ! 420: t = r->in.type; ! 421: d = r->fn.cdim; ! 422: s = r->fn.csiz; ! 423: ! 424: l = block( STASG, l, r, t, d, s ); ! 425: ! 426: if( o == RETURN ){ ! 427: p->in.op = FREE; ! 428: p = l; ! 429: break; ! 430: } ! 431: ! 432: p->in.op = UNARY MUL; ! 433: p->in.left = l; ! 434: p->in.right = NIL; ! 435: break; ! 436: } ! 437: case COLON: ! 438: /* structure colon */ ! 439: ! 440: if( l->fn.csiz != r->fn.csiz ) uerror( "type clash in conditional" ); ! 441: break; ! 442: ! 443: case CALL: ! 444: p->in.right = r = strargs( p->in.right ); ! 445: case UNARY CALL: ! 446: if( !ISPTR(l->in.type)) uerror("illegal function"); ! 447: p->in.type = DECREF(l->in.type); ! 448: if( !ISFTN(p->in.type)) uerror("illegal function"); ! 449: p->in.type = DECREF( p->in.type ); ! 450: p->fn.cdim = l->fn.cdim; ! 451: p->fn.csiz = l->fn.csiz; ! 452: if( l->in.op == UNARY AND && l->in.left->in.op == NAME && ! 453: l->in.left->tn.rval >= 0 && l->in.left->tn.rval != NONAME && ! 454: ( (i=stab[l->in.left->tn.rval].sclass) == FORTRAN || i==UFORTRAN ) ){ ! 455: p->in.op += (FORTCALL-CALL); ! 456: } ! 457: if( p->in.type == STRTY || p->in.type == UNIONTY ){ ! 458: /* function returning structure */ ! 459: /* make function really return ptr to str., with * */ ! 460: ! 461: p->in.op += STCALL-CALL; ! 462: p->in.type = INCREF( p->in.type ); ! 463: p = buildtree( UNARY MUL, p, NIL ); ! 464: ! 465: } ! 466: break; ! 467: ! 468: default: ! 469: cerror( "other code %d", o ); ! 470: } ! 471: ! 472: } ! 473: ! 474: if( actions & CVTO ) p = oconvert(p); ! 475: p = clocal(p); ! 476: ! 477: # ifndef BUG1 ! 478: if( bdebug ) fwalk( p, eprint, 0 ); ! 479: # endif ! 480: ! 481: return(p); ! 482: ! 483: } ! 484: ! 485: NODE * ! 486: strargs( p ) register NODE *p; { /* rewrite structure flavored arguments */ ! 487: ! 488: if( p->in.op == CM ){ ! 489: p->in.left = strargs( p->in.left ); ! 490: p->in.right = strargs( p->in.right ); ! 491: return( p ); ! 492: } ! 493: ! 494: if( p->in.type == STRTY || p->in.type == UNIONTY ){ ! 495: p = block( STARG, p, NIL, p->in.type, p->fn.cdim, p->fn.csiz ); ! 496: p->in.left = buildtree( UNARY AND, p->in.left, NIL ); ! 497: p = clocal(p); ! 498: } ! 499: return( p ); ! 500: } ! 501: ! 502: chkstr( i, j, type ) TWORD type; { ! 503: /* is the MOS or MOU at stab[i] OK for strict reference by a ptr */ ! 504: /* i has been checked to contain a MOS or MOU */ ! 505: /* j is the index in dimtab of the members... */ ! 506: int k, kk; ! 507: ! 508: extern int ddebug; ! 509: ! 510: # ifndef BUG1 ! 511: #ifndef FLEXNAMES ! 512: if( ddebug > 1 ) printf( "chkstr( %.8s(%d), %d )\n", stab[i].sname, i, j ); ! 513: #else ! 514: if( ddebug > 1 ) printf( "chkstr( %s(%d), %d )\n", stab[i].sname, i, j ); ! 515: #endif ! 516: # endif ! 517: if( (k = j) < 0 ) uerror( "undefined structure or union" ); ! 518: else { ! 519: for( ; (kk = dimtab[k] ) >= 0; ++k ){ ! 520: if( kk >= SYMTSZ ){ ! 521: cerror( "gummy structure" ); ! 522: return(1); ! 523: } ! 524: if( kk == i ) return( 1 ); ! 525: switch( stab[kk].stype ){ ! 526: ! 527: case STRTY: ! 528: case UNIONTY: ! 529: if( type == STRTY ) continue; /* no recursive looking for strs */ ! 530: if( hflag && chkstr( i, dimtab[stab[kk].sizoff+1], stab[kk].stype ) ){ ! 531: if( stab[kk].sname[0] == '$' ) return(0); /* $FAKE */ ! 532: werror( ! 533: #ifndef FLEXNAMES ! 534: "illegal member use: perhaps %.8s.%.8s?", ! 535: #else ! 536: "illegal member use: perhaps %s.%s?", ! 537: #endif ! 538: stab[kk].sname, stab[i].sname ); ! 539: return(1); ! 540: } ! 541: } ! 542: } ! 543: } ! 544: return( 0 ); ! 545: } ! 546: ! 547: conval( p, o, q ) register NODE *p, *q; { ! 548: /* apply the op o to the lval part of p; if binary, rhs is val */ ! 549: int i, u; ! 550: CONSZ val; ! 551: ! 552: val = q->tn.lval; ! 553: u = ISUNSIGNED(p->in.type) || ISUNSIGNED(q->in.type); ! 554: if( u && (o==LE||o==LT||o==GE||o==GT)) o += (UGE-GE); ! 555: ! 556: if( p->tn.rval != NONAME && q->tn.rval != NONAME ) return(0); ! 557: if( q->tn.rval != NONAME && o!=PLUS ) return(0); ! 558: if( p->tn.rval != NONAME && o!=PLUS && o!=MINUS ) return(0); ! 559: ! 560: switch( o ){ ! 561: ! 562: case PLUS: ! 563: p->tn.lval += val; ! 564: if( p->tn.rval == NONAME ){ ! 565: p->tn.rval = q->tn.rval; ! 566: p->in.type = q->in.type; ! 567: } ! 568: break; ! 569: case MINUS: ! 570: p->tn.lval -= val; ! 571: break; ! 572: case MUL: ! 573: p->tn.lval *= val; ! 574: break; ! 575: case DIV: ! 576: if( val == 0 ) uerror( "division by 0" ); ! 577: else p->tn.lval /= val; ! 578: break; ! 579: case MOD: ! 580: if( val == 0 ) uerror( "division by 0" ); ! 581: else p->tn.lval %= val; ! 582: break; ! 583: case AND: ! 584: p->tn.lval &= val; ! 585: break; ! 586: case OR: ! 587: p->tn.lval |= val; ! 588: break; ! 589: case ER: ! 590: p->tn.lval ^= val; ! 591: break; ! 592: case LS: ! 593: i = val; ! 594: p->tn.lval = p->tn.lval << i; ! 595: break; ! 596: case RS: ! 597: i = val; ! 598: p->tn.lval = p->tn.lval >> i; ! 599: break; ! 600: ! 601: case UNARY MINUS: ! 602: p->tn.lval = - p->tn.lval; ! 603: break; ! 604: case COMPL: ! 605: p->tn.lval = ~p->tn.lval; ! 606: break; ! 607: case NOT: ! 608: p->tn.lval = !p->tn.lval; ! 609: break; ! 610: case LT: ! 611: p->tn.lval = p->tn.lval < val; ! 612: break; ! 613: case LE: ! 614: p->tn.lval = p->tn.lval <= val; ! 615: break; ! 616: case GT: ! 617: p->tn.lval = p->tn.lval > val; ! 618: break; ! 619: case GE: ! 620: p->tn.lval = p->tn.lval >= val; ! 621: break; ! 622: case ULT: ! 623: p->tn.lval = (p->tn.lval-val)<0; ! 624: break; ! 625: case ULE: ! 626: p->tn.lval = (p->tn.lval-val)<=0; ! 627: break; ! 628: case UGE: ! 629: p->tn.lval = (p->tn.lval-val)>=0; ! 630: break; ! 631: case UGT: ! 632: p->tn.lval = (p->tn.lval-val)>0; ! 633: break; ! 634: case EQ: ! 635: p->tn.lval = p->tn.lval == val; ! 636: break; ! 637: case NE: ! 638: p->tn.lval = p->tn.lval != val; ! 639: break; ! 640: default: ! 641: return(0); ! 642: } ! 643: return(1); ! 644: } ! 645: ! 646: chkpun(p) register NODE *p; { ! 647: ! 648: /* checks p for the existance of a pun */ ! 649: ! 650: /* this is called when the op of p is ASSIGN, RETURN, CAST, COLON, or relational */ ! 651: ! 652: /* one case is when enumerations are used: this applies only to lint */ ! 653: /* in the other case, one operand is a pointer, the other integer type */ ! 654: /* we check that this integer is in fact a constant zero... */ ! 655: ! 656: /* in the case of ASSIGN, any assignment of pointer to integer is illegal */ ! 657: /* this falls out, because the LHS is never 0 */ ! 658: ! 659: register NODE *q; ! 660: register t1, t2; ! 661: register d1, d2; ! 662: ! 663: t1 = p->in.left->in.type; ! 664: t2 = p->in.right->in.type; ! 665: ! 666: if( t1==ENUMTY || t2==ENUMTY ) { /* check for enumerations */ ! 667: if( logop( p->in.op ) && p->in.op != EQ && p->in.op != NE ) { ! 668: uerror( "illegal comparison of enums" ); ! 669: return; ! 670: } ! 671: if( t1==ENUMTY && t2==ENUMTY && p->in.left->fn.csiz==p->in.right->fn.csiz ) return; ! 672: werror( "enumeration type clash, operator %s", opst[p->in.op] ); ! 673: return; ! 674: } ! 675: ! 676: if( ISPTR(t1) || ISARY(t1) ) q = p->in.right; ! 677: else q = p->in.left; ! 678: ! 679: if( !ISPTR(q->in.type) && !ISARY(q->in.type) ){ ! 680: if( q->in.op != ICON || q->tn.lval != 0 ){ ! 681: werror( "illegal combination of pointer and integer, op %s", ! 682: opst[p->in.op] ); ! 683: } ! 684: } ! 685: else { ! 686: d1 = p->in.left->fn.cdim; ! 687: d2 = p->in.right->fn.cdim; ! 688: for( ;; ){ ! 689: if( t1 == t2 ) {; ! 690: if( p->in.left->fn.csiz != p->in.right->fn.csiz ) { ! 691: werror( "illegal structure pointer combination" ); ! 692: } ! 693: return; ! 694: } ! 695: if( ISARY(t1) || ISPTR(t1) ){ ! 696: if( !ISARY(t2) && !ISPTR(t2) ) break; ! 697: if( ISARY(t1) && ISARY(t2) && dimtab[d1] != dimtab[d2] ){ ! 698: werror( "illegal array size combination" ); ! 699: return; ! 700: } ! 701: if( ISARY(t1) ) ++d1; ! 702: if( ISARY(t2) ) ++d2; ! 703: } ! 704: else break; ! 705: t1 = DECREF(t1); ! 706: t2 = DECREF(t2); ! 707: } ! 708: werror( "illegal pointer combination" ); ! 709: } ! 710: ! 711: } ! 712: ! 713: NODE * ! 714: stref( p ) register NODE *p; { ! 715: ! 716: TWORD t; ! 717: int d, s, dsc, align; ! 718: OFFSZ off; ! 719: register struct symtab *q; ! 720: ! 721: /* make p->x */ ! 722: /* this is also used to reference automatic variables */ ! 723: ! 724: q = &stab[p->in.right->tn.rval]; ! 725: p->in.right->in.op = FREE; ! 726: p->in.op = FREE; ! 727: p = pconvert( p->in.left ); ! 728: ! 729: /* make p look like ptr to x */ ! 730: ! 731: if( !ISPTR(p->in.type)){ ! 732: p->in.type = PTR+UNIONTY; ! 733: } ! 734: ! 735: t = INCREF( q->stype ); ! 736: d = q->dimoff; ! 737: s = q->sizoff; ! 738: ! 739: p = makety( p, t, d, s ); ! 740: ! 741: /* compute the offset to be added */ ! 742: ! 743: off = q->offset; ! 744: dsc = q->sclass; ! 745: ! 746: if( dsc & FIELD ) { /* normalize offset */ ! 747: align = ALINT; ! 748: s = INT; ! 749: off = (off/align)*align; ! 750: } ! 751: if( off != 0 ) p = clocal( block( PLUS, p, offcon( off, t, d, s ), t, d, s ) ); ! 752: ! 753: p = buildtree( UNARY MUL, p, NIL ); ! 754: ! 755: /* if field, build field info */ ! 756: ! 757: if( dsc & FIELD ){ ! 758: p = block( FLD, p, NIL, q->stype, 0, q->sizoff ); ! 759: p->tn.rval = PKFIELD( dsc&FLDSIZ, q->offset%align ); ! 760: } ! 761: ! 762: return( clocal(p) ); ! 763: } ! 764: ! 765: notlval(p) register NODE *p; { ! 766: ! 767: /* return 0 if p an lvalue, 1 otherwise */ ! 768: ! 769: again: ! 770: ! 771: switch( p->in.op ){ ! 772: ! 773: case FLD: ! 774: p = p->in.left; ! 775: goto again; ! 776: ! 777: case UNARY MUL: ! 778: /* fix the &(a=b) bug, given that a and b are structures */ ! 779: if( p->in.left->in.op == STASG ) return( 1 ); ! 780: /* and the f().a bug, given that f returns a structure */ ! 781: if( p->in.left->in.op == UNARY STCALL || ! 782: p->in.left->in.op == STCALL ) return( 1 ); ! 783: case NAME: ! 784: case OREG: ! 785: if( ISARY(p->in.type) || ISFTN(p->in.type) ) return(1); ! 786: case REG: ! 787: return(0); ! 788: ! 789: default: ! 790: return(1); ! 791: ! 792: } ! 793: ! 794: } ! 795: ! 796: NODE * ! 797: bcon( i ){ /* make a constant node with value i */ ! 798: register NODE *p; ! 799: ! 800: p = block( ICON, NIL, NIL, INT, 0, INT ); ! 801: p->tn.lval = i; ! 802: p->tn.rval = NONAME; ! 803: return( clocal(p) ); ! 804: } ! 805: ! 806: NODE * ! 807: bpsize(p) register NODE *p; { ! 808: return( offcon( psize(p), p->in.type, p->fn.cdim, p->fn.csiz ) ); ! 809: } ! 810: ! 811: OFFSZ ! 812: psize( p ) NODE *p; { ! 813: /* p is a node of type pointer; psize returns the ! 814: size of the thing pointed to */ ! 815: ! 816: if( !ISPTR(p->in.type) ){ ! 817: uerror( "pointer required"); ! 818: return( SZINT ); ! 819: } ! 820: /* note: no pointers to fields */ ! 821: return( tsize( DECREF(p->in.type), p->fn.cdim, p->fn.csiz ) ); ! 822: } ! 823: ! 824: NODE * ! 825: convert( p, f ) register NODE *p; { ! 826: /* convert an operand of p ! 827: f is either CVTL or CVTR ! 828: operand has type int, and is converted by the size of the other side ! 829: */ ! 830: ! 831: register NODE *q, *r; ! 832: ! 833: q = (f==CVTL)?p->in.left:p->in.right; ! 834: ! 835: r = block( PMCONV, ! 836: q, bpsize(f==CVTL?p->in.right:p->in.left), INT, 0, INT ); ! 837: r = clocal(r); ! 838: if( f == CVTL ) ! 839: p->in.left = r; ! 840: else ! 841: p->in.right = r; ! 842: return(p); ! 843: ! 844: } ! 845: ! 846: econvert( p ) register NODE *p; { ! 847: ! 848: /* change enums to ints, or appropriate types */ ! 849: ! 850: register TWORD ty; ! 851: ! 852: if( (ty=BTYPE(p->in.type)) == ENUMTY || ty == MOETY ) { ! 853: if( dimtab[ p->fn.csiz ] == SZCHAR ) ty = CHAR; ! 854: else if( dimtab[ p->fn.csiz ] == SZINT ) ty = INT; ! 855: else if( dimtab[ p->fn.csiz ] == SZSHORT ) ty = SHORT; ! 856: else ty = LONG; ! 857: ty = ctype( ty ); ! 858: p->fn.csiz = ty; ! 859: MODTYPE(p->in.type,ty); ! 860: if( p->in.op == ICON && ty != LONG ) p->in.type = p->fn.csiz = INT; ! 861: } ! 862: } ! 863: ! 864: NODE * ! 865: pconvert( p ) register NODE *p; { ! 866: ! 867: /* if p should be changed into a pointer, do so */ ! 868: ! 869: if( ISARY( p->in.type) ){ ! 870: p->in.type = DECREF( p->in.type ); ! 871: ++p->fn.cdim; ! 872: return( buildtree( UNARY AND, p, NIL ) ); ! 873: } ! 874: if( ISFTN( p->in.type) ) ! 875: return( buildtree( UNARY AND, p, NIL ) ); ! 876: ! 877: return( p ); ! 878: } ! 879: ! 880: NODE * ! 881: oconvert(p) register NODE *p; { ! 882: /* convert the result itself: used for pointer and unsigned */ ! 883: ! 884: switch(p->in.op) { ! 885: ! 886: case LE: ! 887: case LT: ! 888: case GE: ! 889: case GT: ! 890: if( ISUNSIGNED(p->in.left->in.type) || ISUNSIGNED(p->in.right->in.type) ) p->in.op += (ULE-LE); ! 891: case EQ: ! 892: case NE: ! 893: return( p ); ! 894: ! 895: case MINUS: ! 896: return( clocal( block( PVCONV, ! 897: p, bpsize(p->in.left), INT, 0, INT ) ) ); ! 898: } ! 899: ! 900: cerror( "illegal oconvert: %d", p->in.op ); ! 901: ! 902: return(p); ! 903: } ! 904: ! 905: NODE * ! 906: ptmatch(p) register NODE *p; { ! 907: ! 908: /* makes the operands of p agree; they are ! 909: either pointers or integers, by this time */ ! 910: /* with MINUS, the sizes must be the same */ ! 911: /* with COLON, the types must be the same */ ! 912: ! 913: TWORD t1, t2, t; ! 914: int o, d2, d, s2, s; ! 915: ! 916: o = p->in.op; ! 917: t = t1 = p->in.left->in.type; ! 918: t2 = p->in.right->in.type; ! 919: d = p->in.left->fn.cdim; ! 920: d2 = p->in.right->fn.cdim; ! 921: s = p->in.left->fn.csiz; ! 922: s2 = p->in.right->fn.csiz; ! 923: ! 924: switch( o ){ ! 925: ! 926: case ASSIGN: ! 927: case RETURN: ! 928: case CAST: ! 929: { break; } ! 930: ! 931: case MINUS: ! 932: { if( psize(p->in.left) != psize(p->in.right) ){ ! 933: uerror( "illegal pointer subtraction"); ! 934: } ! 935: break; ! 936: } ! 937: case COLON: ! 938: { if( t1 != t2 ) uerror( "illegal types in :"); ! 939: break; ! 940: } ! 941: default: /* must work harder: relationals or comparisons */ ! 942: ! 943: if( !ISPTR(t1) ){ ! 944: t = t2; ! 945: d = d2; ! 946: s = s2; ! 947: break; ! 948: } ! 949: if( !ISPTR(t2) ){ ! 950: break; ! 951: } ! 952: ! 953: /* both are pointers */ ! 954: if( talign(t2,s2) < talign(t,s) ){ ! 955: t = t2; ! 956: s = s2; ! 957: } ! 958: break; ! 959: } ! 960: ! 961: p->in.left = makety( p->in.left, t, d, s ); ! 962: p->in.right = makety( p->in.right, t, d, s ); ! 963: if( o!=MINUS && !logop(o) ){ ! 964: ! 965: p->in.type = t; ! 966: p->fn.cdim = d; ! 967: p->fn.csiz = s; ! 968: } ! 969: ! 970: return(clocal(p)); ! 971: } ! 972: ! 973: int tdebug = 0; ! 974: ! 975: NODE * ! 976: tymatch(p) register NODE *p; { ! 977: ! 978: /* satisfy the types of various arithmetic binary ops */ ! 979: ! 980: /* rules are: ! 981: if assignment, op, type of LHS ! 982: if any float or doubles, make double ! 983: if any longs, make long ! 984: otherwise, make int ! 985: if either operand is unsigned, the result is... ! 986: */ ! 987: ! 988: register TWORD t1, t2, t, tu; ! 989: register o, u; ! 990: ! 991: o = p->in.op; ! 992: ! 993: t1 = p->in.left->in.type; ! 994: t2 = p->in.right->in.type; ! 995: if( (t1==UNDEF || t2==UNDEF) && o!=CAST ) ! 996: uerror("void type illegal in expression"); ! 997: ! 998: u = 0; ! 999: if( ISUNSIGNED(t1) ){ ! 1000: u = 1; ! 1001: t1 = DEUNSIGN(t1); ! 1002: } ! 1003: if( ISUNSIGNED(t2) ){ ! 1004: u = 1; ! 1005: t2 = DEUNSIGN(t2); ! 1006: } ! 1007: ! 1008: if( ( t1 == CHAR || t1 == SHORT ) && o!= RETURN ) t1 = INT; ! 1009: if( t2 == CHAR || t2 == SHORT ) t2 = INT; ! 1010: ! 1011: if( t1==DOUBLE || t1==FLOAT || t2==DOUBLE || t2==FLOAT ) t = DOUBLE; ! 1012: else if( t1==LONG || t2==LONG ) t = LONG; ! 1013: else t = INT; ! 1014: ! 1015: if( asgop(o) ){ ! 1016: tu = p->in.left->in.type; ! 1017: t = t1; ! 1018: } ! 1019: else { ! 1020: tu = (u && UNSIGNABLE(t))?ENUNSIGN(t):t; ! 1021: } ! 1022: ! 1023: /* because expressions have values that are at least as wide ! 1024: as INT or UNSIGNED, the only conversions needed ! 1025: are those involving FLOAT/DOUBLE, and those ! 1026: from LONG to INT and ULONG to UNSIGNED */ ! 1027: ! 1028: if( t != t1 ) p->in.left = makety( p->in.left, tu, 0, (int)tu ); ! 1029: ! 1030: if( t != t2 || o==CAST ) p->in.right = makety( p->in.right, tu, 0, (int)tu ); ! 1031: ! 1032: if( asgop(o) ){ ! 1033: p->in.type = p->in.left->in.type; ! 1034: p->fn.cdim = p->in.left->fn.cdim; ! 1035: p->fn.csiz = p->in.left->fn.csiz; ! 1036: } ! 1037: else if( !logop(o) ){ ! 1038: p->in.type = tu; ! 1039: p->fn.cdim = 0; ! 1040: p->fn.csiz = t; ! 1041: } ! 1042: ! 1043: # ifndef BUG1 ! 1044: if( tdebug ) printf( "tymatch(%o): %o %s %o => %o\n",p,t1,opst[o],t2,tu ); ! 1045: # endif ! 1046: ! 1047: return(p); ! 1048: } ! 1049: ! 1050: NODE * ! 1051: makety( p, t, d, s ) register NODE *p; TWORD t; { ! 1052: /* make p into type t by inserting a conversion */ ! 1053: ! 1054: if( p->in.type == ENUMTY && p->in.op == ICON ) econvert(p); ! 1055: if( t == p->in.type ){ ! 1056: p->fn.cdim = d; ! 1057: p->fn.csiz = s; ! 1058: return( p ); ! 1059: } ! 1060: ! 1061: if( t & TMASK ){ ! 1062: /* non-simple type */ ! 1063: return( block( PCONV, p, NIL, t, d, s ) ); ! 1064: } ! 1065: ! 1066: if( p->in.op == ICON ){ ! 1067: if( t==DOUBLE||t==FLOAT ){ ! 1068: p->in.op = FCON; ! 1069: if( ISUNSIGNED(p->in.type) ){ ! 1070: p->fpn.dval = (unsigned CONSZ) p->tn.lval; ! 1071: } ! 1072: else { ! 1073: p->fpn.dval = p->tn.lval; ! 1074: } ! 1075: ! 1076: p->in.type = p->fn.csiz = t; ! 1077: return( clocal(p) ); ! 1078: } ! 1079: } ! 1080: ! 1081: return( block( SCONV, p, NIL, t, d, s ) ); ! 1082: ! 1083: } ! 1084: ! 1085: NODE * ! 1086: block( o, l, r, t, d, s ) register NODE *l, *r; TWORD t; { ! 1087: ! 1088: register NODE *p; ! 1089: ! 1090: p = talloc(); ! 1091: p->in.op = o; ! 1092: p->in.left = l; ! 1093: p->in.right = r; ! 1094: p->in.type = t; ! 1095: p->fn.cdim = d; ! 1096: p->fn.csiz = s; ! 1097: return(p); ! 1098: } ! 1099: ! 1100: icons(p) register NODE *p; { ! 1101: /* if p is an integer constant, return its value */ ! 1102: int val; ! 1103: ! 1104: if( p->in.op != ICON ){ ! 1105: uerror( "constant expected"); ! 1106: val = 1; ! 1107: } ! 1108: else { ! 1109: val = p->tn.lval; ! 1110: if( val != p->tn.lval ) uerror( "constant too big for cross-compiler" ); ! 1111: } ! 1112: tfree( p ); ! 1113: return(val); ! 1114: } ! 1115: ! 1116: /* the intent of this table is to examine the ! 1117: operators, and to check them for ! 1118: correctness. ! 1119: ! 1120: The table is searched for the op and the ! 1121: modified type (where this is one of the ! 1122: types INT (includes char and short), LONG, ! 1123: DOUBLE (includes FLOAT), and POINTER ! 1124: ! 1125: The default action is to make the node type integer ! 1126: ! 1127: The actions taken include: ! 1128: PUN check for puns ! 1129: CVTL convert the left operand ! 1130: CVTR convert the right operand ! 1131: TYPL the type is determined by the left operand ! 1132: TYPR the type is determined by the right operand ! 1133: TYMATCH force type of left and right to match, by inserting conversions ! 1134: PTMATCH like TYMATCH, but for pointers ! 1135: LVAL left operand must be lval ! 1136: CVTO convert the op ! 1137: NCVT do not convert the operands ! 1138: OTHER handled by code ! 1139: NCVTR convert the left operand, not the right... ! 1140: ! 1141: */ ! 1142: ! 1143: # define MINT 01 /* integer */ ! 1144: # define MDBI 02 /* integer or double */ ! 1145: # define MSTR 04 /* structure */ ! 1146: # define MPTR 010 /* pointer */ ! 1147: # define MPTI 020 /* pointer or integer */ ! 1148: # define MENU 040 /* enumeration variable or member */ ! 1149: ! 1150: opact( p ) NODE *p; { ! 1151: ! 1152: register mt12, mt1, mt2, o; ! 1153: ! 1154: mt12 = 0; ! 1155: ! 1156: switch( optype(o=p->in.op) ){ ! 1157: ! 1158: case BITYPE: ! 1159: mt12=mt2 = moditype( p->in.right->in.type ); ! 1160: case UTYPE: ! 1161: mt12 &= (mt1 = moditype( p->in.left->in.type )); ! 1162: ! 1163: } ! 1164: ! 1165: switch( o ){ ! 1166: ! 1167: case NAME : ! 1168: case STRING : ! 1169: case ICON : ! 1170: case FCON : ! 1171: case CALL : ! 1172: case UNARY CALL: ! 1173: case UNARY MUL: ! 1174: { return( OTHER ); } ! 1175: case UNARY MINUS: ! 1176: if( mt1 & MDBI ) return( TYPL ); ! 1177: break; ! 1178: ! 1179: case COMPL: ! 1180: if( mt1 & MINT ) return( TYPL ); ! 1181: break; ! 1182: ! 1183: case UNARY AND: ! 1184: { return( NCVT+OTHER ); } ! 1185: case INIT: ! 1186: case CM: ! 1187: case NOT: ! 1188: case CBRANCH: ! 1189: case ANDAND: ! 1190: case OROR: ! 1191: return( 0 ); ! 1192: ! 1193: case MUL: ! 1194: case DIV: ! 1195: if( mt12 & MDBI ) return( TYMATCH ); ! 1196: break; ! 1197: ! 1198: case MOD: ! 1199: case AND: ! 1200: case OR: ! 1201: case ER: ! 1202: if( mt12 & MINT ) return( TYMATCH ); ! 1203: break; ! 1204: ! 1205: case LS: ! 1206: case RS: ! 1207: if( mt12 & MINT ) return( TYMATCH+OTHER ); ! 1208: break; ! 1209: ! 1210: case EQ: ! 1211: case NE: ! 1212: case LT: ! 1213: case LE: ! 1214: case GT: ! 1215: case GE: ! 1216: if( (mt1&MENU)||(mt2&MENU) ) return( PTMATCH+PUN+NCVT ); ! 1217: if( mt12 & MDBI ) return( TYMATCH+CVTO ); ! 1218: else if( mt12 & MPTR ) return( PTMATCH+PUN ); ! 1219: else if( mt12 & MPTI ) return( PTMATCH+PUN ); ! 1220: else break; ! 1221: ! 1222: case QUEST: ! 1223: case COMOP: ! 1224: if( mt2&MENU ) return( TYPR+NCVTR ); ! 1225: return( TYPR ); ! 1226: ! 1227: case STREF: ! 1228: return( NCVTR+OTHER ); ! 1229: ! 1230: case FORCE: ! 1231: return( TYPL ); ! 1232: ! 1233: case COLON: ! 1234: if( mt12 & MENU ) return( NCVT+PUN+PTMATCH ); ! 1235: else if( mt12 & MDBI ) return( TYMATCH ); ! 1236: else if( mt12 & MPTR ) return( TYPL+PTMATCH+PUN ); ! 1237: else if( (mt1&MINT) && (mt2&MPTR) ) return( TYPR+PUN ); ! 1238: else if( (mt1&MPTR) && (mt2&MINT) ) return( TYPL+PUN ); ! 1239: else if( mt12 & MSTR ) return( NCVT+TYPL+OTHER ); ! 1240: break; ! 1241: ! 1242: case ASSIGN: ! 1243: case RETURN: ! 1244: if( mt12 & MSTR ) return( LVAL+NCVT+TYPL+OTHER ); ! 1245: case CAST: ! 1246: if(o==CAST && mt1==0)return(TYPL+TYMATCH); ! 1247: if( mt12 & MDBI ) return( TYPL+LVAL+TYMATCH ); ! 1248: else if( (mt1&MENU)||(mt2&MENU) ) return( LVAL+NCVT+TYPL+PTMATCH+PUN ); ! 1249: else if( mt12 == 0 ) break; ! 1250: else if( mt1 & MPTR ) return( LVAL+PTMATCH+PUN ); ! 1251: else if( mt12 & MPTI ) return( TYPL+LVAL+TYMATCH+PUN ); ! 1252: break; ! 1253: ! 1254: case ASG LS: ! 1255: case ASG RS: ! 1256: if( mt12 & MINT ) return( TYPL+LVAL+OTHER ); ! 1257: break; ! 1258: ! 1259: case ASG MUL: ! 1260: case ASG DIV: ! 1261: if( mt12 & MDBI ) return( LVAL+TYMATCH ); ! 1262: break; ! 1263: ! 1264: case ASG MOD: ! 1265: case ASG AND: ! 1266: case ASG OR: ! 1267: case ASG ER: ! 1268: if( mt12 & MINT ) return( LVAL+TYMATCH ); ! 1269: break; ! 1270: ! 1271: case ASG PLUS: ! 1272: case ASG MINUS: ! 1273: case INCR: ! 1274: case DECR: ! 1275: if( mt12 & MDBI ) return( TYMATCH+LVAL ); ! 1276: else if( (mt1&MPTR) && (mt2&MINT) ) return( TYPL+LVAL+CVTR ); ! 1277: break; ! 1278: ! 1279: case MINUS: ! 1280: if( mt12 & MPTR ) return( CVTO+PTMATCH+PUN ); ! 1281: if( mt2 & MPTR ) break; ! 1282: case PLUS: ! 1283: if( mt12 & MDBI ) return( TYMATCH ); ! 1284: else if( (mt1&MPTR) && (mt2&MINT) ) return( TYPL+CVTR ); ! 1285: else if( (mt1&MINT) && (mt2&MPTR) ) return( TYPR+CVTL ); ! 1286: ! 1287: } ! 1288: uerror( "operands of %s have incompatible types", opst[o] ); ! 1289: return( NCVT ); ! 1290: } ! 1291: ! 1292: moditype( ty ) TWORD ty; { ! 1293: ! 1294: switch( ty ){ ! 1295: ! 1296: case TVOID: ! 1297: case UNDEF: ! 1298: return(0); /* type is void */ ! 1299: case ENUMTY: ! 1300: case MOETY: ! 1301: return( MENU ); ! 1302: ! 1303: case STRTY: ! 1304: case UNIONTY: ! 1305: return( MSTR ); ! 1306: ! 1307: case CHAR: ! 1308: case SHORT: ! 1309: case UCHAR: ! 1310: case USHORT: ! 1311: return( MINT|MPTI|MDBI ); ! 1312: case UNSIGNED: ! 1313: case ULONG: ! 1314: case INT: ! 1315: case LONG: ! 1316: return( MINT|MDBI|MPTI ); ! 1317: case FLOAT: ! 1318: case DOUBLE: ! 1319: return( MDBI ); ! 1320: default: ! 1321: return( MPTR|MPTI ); ! 1322: ! 1323: } ! 1324: } ! 1325: ! 1326: NODE * ! 1327: doszof( p ) register NODE *p; { ! 1328: /* do sizeof p */ ! 1329: int i; ! 1330: ! 1331: /* whatever is the meaning of this if it is a bitfield? */ ! 1332: i = tsize( p->in.type, p->fn.cdim, p->fn.csiz )/SZCHAR; ! 1333: ! 1334: tfree(p); ! 1335: if( i <= 0 ) werror( "sizeof returns 0" ); ! 1336: return( bcon( i ) ); ! 1337: } ! 1338: ! 1339: # ifndef BUG2 ! 1340: eprint( p, down, a, b ) register NODE *p; int *a, *b; { ! 1341: register ty; ! 1342: ! 1343: *a = *b = down+1; ! 1344: while( down > 1 ){ ! 1345: printf( "\t" ); ! 1346: down -= 2; ! 1347: } ! 1348: if( down ) printf( " " ); ! 1349: ! 1350: ty = optype( p->in.op ); ! 1351: ! 1352: printf("%o) %s, ", p, opst[p->in.op] ); ! 1353: if( ty == LTYPE ){ ! 1354: printf( CONFMT, p->tn.lval ); ! 1355: printf( ", %d, ", p->tn.rval ); ! 1356: } ! 1357: tprint( p->in.type ); ! 1358: printf( ", %d, %d\n", p->fn.cdim, p->fn.csiz ); ! 1359: } ! 1360: # endif ! 1361: ! 1362: prtdcon( p ) register NODE *p; { ! 1363: int i; ! 1364: ! 1365: if( p->in.op == FCON ){ ! 1366: locctr( DATA ); ! 1367: defalign( ALDOUBLE ); ! 1368: deflab( i = getlab() ); ! 1369: # ifndef SFCON ! 1370: fincode( p->fpn.dval, SZDOUBLE ); ! 1371: p->in.type = DOUBLE; ! 1372: # else ! 1373: p->in.type = fincode( p->fpn.dval, 0 ); ! 1374: # endif ! 1375: p->tn.lval = 0; ! 1376: p->tn.rval = -i; ! 1377: p->in.op = NAME; ! 1378: } ! 1379: } ! 1380: ! 1381: ! 1382: int edebug = 0; ! 1383: ecomp( p ) register NODE *p; { ! 1384: # ifndef BUG2 ! 1385: if( edebug ) fwalk( p, eprint, 0 ); ! 1386: # endif ! 1387: if( !reached ){ ! 1388: werror( "statement not reached" ); ! 1389: reached = 1; ! 1390: } ! 1391: p = optim(p); ! 1392: walkf( p, prtdcon ); ! 1393: locctr( PROG ); ! 1394: ecode( p ); ! 1395: tfree(p); ! 1396: } ! 1397: ! 1398: # ifdef STDPRTREE ! 1399: # ifndef ONEPASS ! 1400: ! 1401: prtree(p) register NODE *p; { ! 1402: ! 1403: register struct symtab *q; ! 1404: register ty; ! 1405: ! 1406: # ifdef MYPRTREE ! 1407: MYPRTREE(p); /* local action can be taken here; then return... */ ! 1408: #endif ! 1409: ! 1410: ty = optype(p->in.op); ! 1411: ! 1412: printf( "%d\t", p->in.op ); ! 1413: ! 1414: if( ty == LTYPE ) { ! 1415: printf( CONFMT, p->tn.lval ); ! 1416: printf( "\t" ); ! 1417: } ! 1418: if( ty != BITYPE ) { ! 1419: if( p->in.op == NAME || p->in.op == ICON ) printf( "0\t" ); ! 1420: else printf( "%d\t", p->tn.rval ); ! 1421: } ! 1422: ! 1423: printf( "%o\t", p->in.type ); ! 1424: ! 1425: /* handle special cases */ ! 1426: ! 1427: switch( p->in.op ){ ! 1428: ! 1429: case NAME: ! 1430: case ICON: ! 1431: /* print external name */ ! 1432: if( p->tn.rval == NONAME ) printf( "\n" ); ! 1433: else if( p->tn.rval >= 0 ){ ! 1434: q = &stab[p->tn.rval]; ! 1435: printf( "%s\n", exname(q->sname) ); ! 1436: } ! 1437: else { /* label */ ! 1438: printf( LABFMT, -p->tn.rval ); ! 1439: } ! 1440: break; ! 1441: ! 1442: case STARG: ! 1443: case STASG: ! 1444: case STCALL: ! 1445: case UNARY STCALL: ! 1446: /* print out size */ ! 1447: /* use lhs size, in order to avoid hassles with the structure `.' operator */ ! 1448: ! 1449: /* note: p->in.left not a field... */ ! 1450: printf( CONFMT, (CONSZ) tsize( STRTY, p->in.left->fn.cdim, p->in.left->fn.csiz ) ); ! 1451: printf( "\t%d\t\n", talign( STRTY, p->in.left->fn.csiz ) ); ! 1452: break; ! 1453: ! 1454: default: ! 1455: printf( "\n" ); ! 1456: } ! 1457: ! 1458: if( ty != LTYPE ) prtree( p->in.left ); ! 1459: if( ty == BITYPE ) prtree( p->in.right ); ! 1460: ! 1461: } ! 1462: ! 1463: # else ! 1464: ! 1465: p2tree(p) register NODE *p; { ! 1466: register ty; ! 1467: ! 1468: # ifdef MYP2TREE ! 1469: MYP2TREE(p); /* local action can be taken here; then return... */ ! 1470: # endif ! 1471: ! 1472: ty = optype(p->in.op); ! 1473: ! 1474: switch( p->in.op ){ ! 1475: ! 1476: case NAME: ! 1477: case ICON: ! 1478: #ifndef FLEXNAMES ! 1479: if( p->tn.rval == NONAME ) p->in.name[0] = '\0'; ! 1480: #else ! 1481: if( p->tn.rval == NONAME ) p->in.name = ""; ! 1482: #endif ! 1483: else if( p->tn.rval >= 0 ){ /* copy name from exname */ ! 1484: register char *cp; ! 1485: register i; ! 1486: cp = exname( stab[p->tn.rval].sname ); ! 1487: #ifndef FLEXNAMES ! 1488: for( i=0; i<NCHNAM; ++i ) p->in.name[i] = *cp++; ! 1489: #else ! 1490: p->in.name = tstr(cp); ! 1491: #endif ! 1492: } ! 1493: #ifndef FLEXNAMES ! 1494: else sprintf( p->in.name, LABFMT, -p->tn.rval ); ! 1495: #else ! 1496: else { ! 1497: char temp[32]; ! 1498: sprintf( temp, LABFMT, -p->tn.rval ); ! 1499: p->in.name = tstr(temp); ! 1500: } ! 1501: #endif ! 1502: break; ! 1503: ! 1504: case STARG: ! 1505: case STASG: ! 1506: case STCALL: ! 1507: case UNARY STCALL: ! 1508: /* set up size parameters */ ! 1509: p->stn.stsize = (tsize(STRTY,p->in.left->fn.cdim,p->in.left->fn.csiz)+SZCHAR-1)/SZCHAR; ! 1510: p->stn.stalign = talign(STRTY,p->in.left->fn.csiz)/SZCHAR; ! 1511: break; ! 1512: ! 1513: case REG: ! 1514: rbusy( p->tn.rval, p->in.type ); ! 1515: default: ! 1516: #ifndef FLEXNAMES ! 1517: p->in.name[0] = '\0'; ! 1518: #else ! 1519: p->in.name = ""; ! 1520: #endif ! 1521: } ! 1522: ! 1523: p->in.rall = NOPREF; ! 1524: ! 1525: if( ty != LTYPE ) p2tree( p->in.left ); ! 1526: if( ty == BITYPE ) p2tree( p->in.right ); ! 1527: } ! 1528: ! 1529: # endif ! 1530: # endif
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