795 lines
17 KiB
C
795 lines
17 KiB
C
![]() |
/***** spin: flow.c *****/
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/* Copyright (c) 1989-2003 by Lucent Technologies, Bell Laboratories. */
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/* All Rights Reserved. This software is for educational purposes only. */
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/* No guarantee whatsoever is expressed or implied by the distribution of */
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/* this code. Permission is given to distribute this code provided that */
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/* this introductory message is not removed and no monies are exchanged. */
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/* Software written by Gerard J. Holzmann. For tool documentation see: */
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/* http://spinroot.com/ */
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/* Send all bug-reports and/or questions to: bugs@spinroot.com */
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#include "spin.h"
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#include "y.tab.h"
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extern Symbol *Fname;
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extern int nr_errs, lineno, verbose;
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extern short has_unless, has_badelse;
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Element *Al_El = ZE;
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Label *labtab = (Label *) 0;
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int Unique=0, Elcnt=0, DstepStart = -1;
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static Lbreak *breakstack = (Lbreak *) 0;
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static Lextok *innermost;
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static SeqList *cur_s = (SeqList *) 0;
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static int break_id=0;
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static Element *if_seq(Lextok *);
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static Element *new_el(Lextok *);
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static Element *unless_seq(Lextok *);
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static void add_el(Element *, Sequence *);
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static void attach_escape(Sequence *, Sequence *);
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static void mov_lab(Symbol *, Element *, Element *);
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static void walk_atomic(Element *, Element *, int);
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void
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open_seq(int top)
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{ SeqList *t;
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Sequence *s = (Sequence *) emalloc(sizeof(Sequence));
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t = seqlist(s, cur_s);
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cur_s = t;
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if (top) Elcnt = 1;
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}
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void
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rem_Seq(void)
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{
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DstepStart = Unique;
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}
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void
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unrem_Seq(void)
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{
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DstepStart = -1;
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}
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static int
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Rjumpslocal(Element *q, Element *stop)
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{ Element *lb, *f;
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SeqList *h;
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/* allow no jumps out of a d_step sequence */
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for (f = q; f && f != stop; f = f->nxt)
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{ if (f && f->n && f->n->ntyp == GOTO)
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{ lb = get_lab(f->n, 0);
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if (!lb || lb->Seqno < DstepStart)
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{ lineno = f->n->ln;
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Fname = f->n->fn;
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return 0;
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} }
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for (h = f->sub; h; h = h->nxt)
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{ if (!Rjumpslocal(h->this->frst, h->this->last))
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return 0;
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} }
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return 1;
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}
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void
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cross_dsteps(Lextok *a, Lextok *b)
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{
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if (a && b
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&& a->indstep != b->indstep)
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{ lineno = a->ln;
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Fname = a->fn;
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fatal("jump into d_step sequence", (char *) 0);
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}
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}
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int
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is_skip(Lextok *n)
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{
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return (n->ntyp == PRINT
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|| n->ntyp == PRINTM
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|| (n->ntyp == 'c'
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&& n->lft
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&& n->lft->ntyp == CONST
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&& n->lft->val == 1));
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}
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void
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check_sequence(Sequence *s)
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{ Element *e, *le = ZE;
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Lextok *n;
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int cnt = 0;
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for (e = s->frst; e; le = e, e = e->nxt)
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{ n = e->n;
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if (is_skip(n) && !has_lab(e, 0))
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{ cnt++;
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if (cnt > 1
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&& n->ntyp != PRINT
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&& n->ntyp != PRINTM)
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{ if (verbose&32)
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printf("spin: line %d %s, redundant skip\n",
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n->ln, n->fn->name);
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if (e != s->frst
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&& e != s->last
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&& e != s->extent)
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{ e->status |= DONE; /* not unreachable */
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le->nxt = e->nxt; /* remove it */
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e = le;
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}
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}
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} else
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cnt = 0;
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}
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}
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void
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prune_opts(Lextok *n)
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{ SeqList *l;
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extern Symbol *context;
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extern char *claimproc;
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if (!n
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|| (context && claimproc && strcmp(context->name, claimproc) == 0))
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return;
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for (l = n->sl; l; l = l->nxt) /* find sequences of unlabeled skips */
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check_sequence(l->this);
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}
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Sequence *
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close_seq(int nottop)
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{ Sequence *s = cur_s->this;
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Symbol *z;
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if (nottop > 0 && (z = has_lab(s->frst, 0)))
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{ printf("error: (%s:%d) label %s placed incorrectly\n",
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(s->frst->n)?s->frst->n->fn->name:"-",
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(s->frst->n)?s->frst->n->ln:0,
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z->name);
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switch (nottop) {
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case 1:
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printf("=====> stmnt unless Label: stmnt\n");
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printf("sorry, cannot jump to the guard of an\n");
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printf("escape (it is not a unique state)\n");
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break;
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case 2:
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printf("=====> instead of ");
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printf("\"Label: stmnt unless stmnt\"\n");
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printf("=====> always use ");
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printf("\"Label: { stmnt unless stmnt }\"\n");
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break;
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case 3:
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printf("=====> instead of ");
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printf("\"atomic { Label: statement ... }\"\n");
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printf("=====> always use ");
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printf("\"Label: atomic { statement ... }\"\n");
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break;
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case 4:
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printf("=====> instead of ");
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printf("\"d_step { Label: statement ... }\"\n");
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printf("=====> always use ");
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printf("\"Label: d_step { statement ... }\"\n");
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break;
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case 5:
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printf("=====> instead of ");
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printf("\"{ Label: statement ... }\"\n");
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printf("=====> always use ");
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printf("\"Label: { statement ... }\"\n");
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break;
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case 6:
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printf("=====>instead of\n");
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printf(" do (or if)\n");
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printf(" :: ...\n");
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printf(" :: Label: statement\n");
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printf(" od (of fi)\n");
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printf("=====>always use\n");
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printf("Label: do (or if)\n");
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printf(" :: ...\n");
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printf(" :: statement\n");
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printf(" od (or fi)\n");
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break;
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case 7:
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printf("cannot happen - labels\n");
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break;
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}
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alldone(1);
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}
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if (nottop == 4
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&& !Rjumpslocal(s->frst, s->last))
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fatal("non_local jump in d_step sequence", (char *) 0);
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cur_s = cur_s->nxt;
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s->maxel = Elcnt;
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s->extent = s->last;
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if (!s->last)
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fatal("sequence must have at least one statement", (char *) 0);
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return s;
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}
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Lextok *
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do_unless(Lextok *No, Lextok *Es)
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{ SeqList *Sl;
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Lextok *Re = nn(ZN, UNLESS, ZN, ZN);
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Re->ln = No->ln;
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Re->fn = No->fn;
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has_unless++;
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if (Es->ntyp == NON_ATOMIC)
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Sl = Es->sl;
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else
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{ open_seq(0); add_seq(Es);
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Sl = seqlist(close_seq(1), 0);
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}
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if (No->ntyp == NON_ATOMIC)
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{ No->sl->nxt = Sl;
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Sl = No->sl;
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} else if (No->ntyp == ':'
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&& (No->lft->ntyp == NON_ATOMIC
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|| No->lft->ntyp == ATOMIC
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|| No->lft->ntyp == D_STEP))
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{
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int tok = No->lft->ntyp;
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No->lft->sl->nxt = Sl;
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Re->sl = No->lft->sl;
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open_seq(0); add_seq(Re);
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Re = nn(ZN, tok, ZN, ZN);
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Re->sl = seqlist(close_seq(7), 0);
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Re->ln = No->ln;
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Re->fn = No->fn;
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Re = nn(No, ':', Re, ZN); /* lift label */
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Re->ln = No->ln;
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Re->fn = No->fn;
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return Re;
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} else
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{ open_seq(0); add_seq(No);
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Sl = seqlist(close_seq(2), Sl);
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}
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Re->sl = Sl;
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return Re;
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}
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SeqList *
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seqlist(Sequence *s, SeqList *r)
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{ SeqList *t = (SeqList *) emalloc(sizeof(SeqList));
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t->this = s;
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t->nxt = r;
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return t;
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}
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static Element *
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new_el(Lextok *n)
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{ Element *m;
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if (n)
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{ if (n->ntyp == IF || n->ntyp == DO)
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return if_seq(n);
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if (n->ntyp == UNLESS)
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return unless_seq(n);
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}
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m = (Element *) emalloc(sizeof(Element));
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m->n = n;
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m->seqno = Elcnt++;
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m->Seqno = Unique++;
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m->Nxt = Al_El; Al_El = m;
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return m;
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}
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static int
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has_chanref(Lextok *n)
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{
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if (!n) return 0;
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switch (n->ntyp) {
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case 's': case 'r':
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#if 0
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case 'R': case LEN:
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#endif
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case FULL: case NFULL:
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case EMPTY: case NEMPTY:
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return 1;
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default:
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break;
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}
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if (has_chanref(n->lft))
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return 1;
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return has_chanref(n->rgt);
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}
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void
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loose_ends(void) /* properly tie-up ends of sub-sequences */
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{ Element *e, *f;
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for (e = Al_El; e; e = e->Nxt)
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{ if (!e->n
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|| !e->nxt)
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continue;
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switch (e->n->ntyp) {
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case ATOMIC:
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case NON_ATOMIC:
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case D_STEP:
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f = e->nxt;
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while (f && f->n->ntyp == '.')
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f = f->nxt;
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if (0) printf("link %d, {%d .. %d} -> %d (ntyp=%d) was %d\n",
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e->seqno,
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e->n->sl->this->frst->seqno,
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e->n->sl->this->last->seqno,
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f?f->seqno:-1, f?f->n->ntyp:-1,
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e->n->sl->this->last->nxt?e->n->sl->this->last->nxt->seqno:-1);
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if (!e->n->sl->this->last->nxt)
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e->n->sl->this->last->nxt = f;
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else
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{ if (e->n->sl->this->last->nxt->n->ntyp != GOTO)
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{ if (!f || e->n->sl->this->last->nxt->seqno != f->seqno)
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non_fatal("unexpected: loose ends", (char *)0);
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} else
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e->n->sl->this->last = e->n->sl->this->last->nxt;
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/*
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* fix_dest can push a goto into the nxt position
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* in that case the goto wins and f is not needed
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* but the last fields needs adjusting
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*/
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}
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break;
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} }
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}
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static Element *
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if_seq(Lextok *n)
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{ int tok = n->ntyp;
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SeqList *s = n->sl;
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Element *e = new_el(ZN);
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Element *t = new_el(nn(ZN,'.',ZN,ZN)); /* target */
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SeqList *z, *prev_z = (SeqList *) 0;
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SeqList *move_else = (SeqList *) 0; /* to end of optionlist */
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int ref_chans = 0;
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for (z = s; z; z = z->nxt)
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{ if (!z->this->frst)
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continue;
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if (z->this->frst->n->ntyp == ELSE)
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{ if (move_else)
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fatal("duplicate `else'", (char *) 0);
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if (z->nxt) /* is not already at the end */
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{ move_else = z;
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if (prev_z)
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prev_z->nxt = z->nxt;
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else
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s = n->sl = z->nxt;
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continue;
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}
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} else
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ref_chans |= has_chanref(z->this->frst->n);
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prev_z = z;
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}
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if (move_else)
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{ move_else->nxt = (SeqList *) 0;
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/* if there is no prev, then else was at the end */
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if (!prev_z) fatal("cannot happen - if_seq", (char *) 0);
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prev_z->nxt = move_else;
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prev_z = move_else;
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}
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if (prev_z
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&& ref_chans
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&& prev_z->this->frst->n->ntyp == ELSE)
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{ prev_z->this->frst->n->val = 1;
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has_badelse++;
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non_fatal("dubious use of 'else' combined with i/o,",
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(char *)0);
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nr_errs--;
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}
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e->n = nn(n, tok, ZN, ZN);
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e->n->sl = s; /* preserve as info only */
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e->sub = s;
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for (z = s; z; prev_z = z, z = z->nxt)
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add_el(t, z->this); /* append target */
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if (tok == DO)
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{ add_el(t, cur_s->this); /* target upfront */
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t = new_el(nn(n, BREAK, ZN, ZN)); /* break target */
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set_lab(break_dest(), t); /* new exit */
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breakstack = breakstack->nxt; /* pop stack */
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}
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add_el(e, cur_s->this);
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add_el(t, cur_s->this);
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return e; /* destination node for label */
|
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}
|
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|
||
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static void
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escape_el(Element *f, Sequence *e)
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||
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{ SeqList *z;
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||
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|
||
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for (z = f->esc; z; z = z->nxt)
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||
|
if (z->this == e)
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return; /* already there */
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||
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|
||
|
/* cover the lower-level escapes of this state */
|
||
|
for (z = f->esc; z; z = z->nxt)
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||
|
attach_escape(z->this, e);
|
||
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|
||
|
/* now attach escape to the state itself */
|
||
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|
||
|
f->esc = seqlist(e, f->esc); /* in lifo order... */
|
||
|
#ifdef DEBUG
|
||
|
printf("attach %d (", e->frst->Seqno);
|
||
|
comment(stdout, e->frst->n, 0);
|
||
|
printf(") to %d (", f->Seqno);
|
||
|
comment(stdout, f->n, 0);
|
||
|
printf(")\n");
|
||
|
#endif
|
||
|
switch (f->n->ntyp) {
|
||
|
case UNLESS:
|
||
|
attach_escape(f->sub->this, e);
|
||
|
break;
|
||
|
case IF:
|
||
|
case DO:
|
||
|
for (z = f->sub; z; z = z->nxt)
|
||
|
attach_escape(z->this, e);
|
||
|
break;
|
||
|
case D_STEP:
|
||
|
/* attach only to the guard stmnt */
|
||
|
escape_el(f->n->sl->this->frst, e);
|
||
|
break;
|
||
|
case ATOMIC:
|
||
|
case NON_ATOMIC:
|
||
|
/* attach to all stmnts */
|
||
|
attach_escape(f->n->sl->this, e);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
attach_escape(Sequence *n, Sequence *e)
|
||
|
{ Element *f;
|
||
|
|
||
|
for (f = n->frst; f; f = f->nxt)
|
||
|
{ escape_el(f, e);
|
||
|
if (f == n->extent)
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static Element *
|
||
|
unless_seq(Lextok *n)
|
||
|
{ SeqList *s = n->sl;
|
||
|
Element *e = new_el(ZN);
|
||
|
Element *t = new_el(nn(ZN,'.',ZN,ZN)); /* target */
|
||
|
SeqList *z;
|
||
|
|
||
|
e->n = nn(n, UNLESS, ZN, ZN);
|
||
|
e->n->sl = s; /* info only */
|
||
|
e->sub = s;
|
||
|
|
||
|
/* need 2 sequences: normal execution and escape */
|
||
|
if (!s || !s->nxt || s->nxt->nxt)
|
||
|
fatal("unexpected unless structure", (char *)0);
|
||
|
|
||
|
/* append the target state to both */
|
||
|
for (z = s; z; z = z->nxt)
|
||
|
add_el(t, z->this);
|
||
|
|
||
|
/* attach escapes to all states in normal sequence */
|
||
|
attach_escape(s->this, s->nxt->this);
|
||
|
|
||
|
add_el(e, cur_s->this);
|
||
|
add_el(t, cur_s->this);
|
||
|
#ifdef DEBUG
|
||
|
printf("unless element (%d,%d):\n", e->Seqno, t->Seqno);
|
||
|
for (z = s; z; z = z->nxt)
|
||
|
{ Element *x; printf("\t%d,%d,%d :: ",
|
||
|
z->this->frst->Seqno,
|
||
|
z->this->extent->Seqno,
|
||
|
z->this->last->Seqno);
|
||
|
for (x = z->this->frst; x; x = x->nxt)
|
||
|
printf("(%d)", x->Seqno);
|
||
|
printf("\n");
|
||
|
}
|
||
|
#endif
|
||
|
return e;
|
||
|
}
|
||
|
|
||
|
Element *
|
||
|
mk_skip(void)
|
||
|
{ Lextok *t = nn(ZN, CONST, ZN, ZN);
|
||
|
t->val = 1;
|
||
|
return new_el(nn(ZN, 'c', t, ZN));
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
add_el(Element *e, Sequence *s)
|
||
|
{
|
||
|
if (e->n->ntyp == GOTO)
|
||
|
{ Symbol *z = has_lab(e, (1|2|4));
|
||
|
if (z)
|
||
|
{ Element *y; /* insert a skip */
|
||
|
y = mk_skip();
|
||
|
mov_lab(z, e, y); /* inherit label */
|
||
|
add_el(y, s);
|
||
|
} }
|
||
|
#ifdef DEBUG
|
||
|
printf("add_el %d after %d -- ",
|
||
|
e->Seqno, (s->last)?s->last->Seqno:-1);
|
||
|
comment(stdout, e->n, 0);
|
||
|
printf("\n");
|
||
|
#endif
|
||
|
if (!s->frst)
|
||
|
s->frst = e;
|
||
|
else
|
||
|
s->last->nxt = e;
|
||
|
s->last = e;
|
||
|
}
|
||
|
|
||
|
static Element *
|
||
|
colons(Lextok *n)
|
||
|
{
|
||
|
if (!n)
|
||
|
return ZE;
|
||
|
if (n->ntyp == ':')
|
||
|
{ Element *e = colons(n->lft);
|
||
|
set_lab(n->sym, e);
|
||
|
return e;
|
||
|
}
|
||
|
innermost = n;
|
||
|
return new_el(n);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
add_seq(Lextok *n)
|
||
|
{ Element *e;
|
||
|
|
||
|
if (!n) return;
|
||
|
innermost = n;
|
||
|
e = colons(n);
|
||
|
if (innermost->ntyp != IF
|
||
|
&& innermost->ntyp != DO
|
||
|
&& innermost->ntyp != UNLESS)
|
||
|
add_el(e, cur_s->this);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
set_lab(Symbol *s, Element *e)
|
||
|
{ Label *l; extern Symbol *context;
|
||
|
|
||
|
if (!s) return;
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
if (l->s == s && l->c == context)
|
||
|
{ non_fatal("label %s redeclared", s->name);
|
||
|
break;
|
||
|
}
|
||
|
l = (Label *) emalloc(sizeof(Label));
|
||
|
l->s = s;
|
||
|
l->c = context;
|
||
|
l->e = e;
|
||
|
l->nxt = labtab;
|
||
|
labtab = l;
|
||
|
}
|
||
|
|
||
|
Element *
|
||
|
get_lab(Lextok *n, int md)
|
||
|
{ Label *l;
|
||
|
Symbol *s = n->sym;
|
||
|
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
if (s == l->s)
|
||
|
return (l->e);
|
||
|
|
||
|
lineno = n->ln;
|
||
|
Fname = n->fn;
|
||
|
if (md) fatal("undefined label %s", s->name);
|
||
|
return ZE;
|
||
|
}
|
||
|
|
||
|
Symbol *
|
||
|
has_lab(Element *e, int special)
|
||
|
{ Label *l;
|
||
|
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
{ if (e != l->e)
|
||
|
continue;
|
||
|
if (special == 0
|
||
|
|| ((special&1) && !strncmp(l->s->name, "accept", 6))
|
||
|
|| ((special&2) && !strncmp(l->s->name, "end", 3))
|
||
|
|| ((special&4) && !strncmp(l->s->name, "progress", 8)))
|
||
|
return (l->s);
|
||
|
}
|
||
|
return ZS;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
mov_lab(Symbol *z, Element *e, Element *y)
|
||
|
{ Label *l;
|
||
|
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
if (e == l->e)
|
||
|
{ l->e = y;
|
||
|
return;
|
||
|
}
|
||
|
if (e->n)
|
||
|
{ lineno = e->n->ln;
|
||
|
Fname = e->n->fn;
|
||
|
}
|
||
|
fatal("cannot happen - mov_lab %s", z->name);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
fix_dest(Symbol *c, Symbol *a) /* c:label name, a:proctype name */
|
||
|
{ Label *l; extern Symbol *context;
|
||
|
|
||
|
#if 0
|
||
|
printf("ref to label '%s' in proctype '%s', search:\n",
|
||
|
c->name, a->name);
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
printf(" %s in %s\n", l->s->name, l->c->name);
|
||
|
#endif
|
||
|
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
{ if (strcmp(c->name, l->s->name) == 0
|
||
|
&& strcmp(a->name, l->c->name) == 0) /* ? */
|
||
|
break;
|
||
|
}
|
||
|
if (!l)
|
||
|
{ printf("spin: label '%s' (proctype %s)\n", c->name, a->name);
|
||
|
non_fatal("unknown label '%s'", c->name);
|
||
|
if (context == a)
|
||
|
printf("spin: cannot remote ref a label inside the same proctype\n");
|
||
|
return;
|
||
|
}
|
||
|
if (!l->e || !l->e->n)
|
||
|
fatal("fix_dest error (%s)", c->name);
|
||
|
if (l->e->n->ntyp == GOTO)
|
||
|
{ Element *y = (Element *) emalloc(sizeof(Element));
|
||
|
int keep_ln = l->e->n->ln;
|
||
|
Symbol *keep_fn = l->e->n->fn;
|
||
|
|
||
|
/* insert skip - or target is optimized away */
|
||
|
y->n = l->e->n; /* copy of the goto */
|
||
|
y->seqno = find_maxel(a); /* unique seqno within proc */
|
||
|
y->nxt = l->e->nxt;
|
||
|
y->Seqno = Unique++; y->Nxt = Al_El; Al_El = y;
|
||
|
|
||
|
/* turn the original element+seqno into a skip */
|
||
|
l->e->n = nn(ZN, 'c', nn(ZN, CONST, ZN, ZN), ZN);
|
||
|
l->e->n->ln = l->e->n->lft->ln = keep_ln;
|
||
|
l->e->n->fn = l->e->n->lft->fn = keep_fn;
|
||
|
l->e->n->lft->val = 1;
|
||
|
l->e->nxt = y; /* append the goto */
|
||
|
}
|
||
|
l->e->status |= CHECK2; /* treat as if global */
|
||
|
if (l->e->status & (ATOM | L_ATOM | D_ATOM))
|
||
|
{ non_fatal("cannot reference label inside atomic or d_step (%s)",
|
||
|
c->name);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
int
|
||
|
find_lab(Symbol *s, Symbol *c, int markit)
|
||
|
{ Label *l;
|
||
|
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
{ if (strcmp(s->name, l->s->name) == 0
|
||
|
&& strcmp(c->name, l->c->name) == 0)
|
||
|
{ l->visible |= markit;
|
||
|
return (l->e->seqno);
|
||
|
} }
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
pushbreak(void)
|
||
|
{ Lbreak *r = (Lbreak *) emalloc(sizeof(Lbreak));
|
||
|
Symbol *l;
|
||
|
char buf[64];
|
||
|
|
||
|
sprintf(buf, ":b%d", break_id++);
|
||
|
l = lookup(buf);
|
||
|
r->l = l;
|
||
|
r->nxt = breakstack;
|
||
|
breakstack = r;
|
||
|
}
|
||
|
|
||
|
Symbol *
|
||
|
break_dest(void)
|
||
|
{
|
||
|
if (!breakstack)
|
||
|
fatal("misplaced break statement", (char *)0);
|
||
|
return breakstack->l;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
make_atomic(Sequence *s, int added)
|
||
|
{ Element *f;
|
||
|
|
||
|
walk_atomic(s->frst, s->last, added);
|
||
|
|
||
|
f = s->last;
|
||
|
switch (f->n->ntyp) { /* is last step basic stmnt or sequence ? */
|
||
|
case NON_ATOMIC:
|
||
|
case ATOMIC:
|
||
|
/* redo and search for the last step of that sequence */
|
||
|
make_atomic(f->n->sl->this, added);
|
||
|
break;
|
||
|
|
||
|
case UNLESS:
|
||
|
/* escapes are folded into main sequence */
|
||
|
make_atomic(f->sub->this, added);
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
f->status &= ~ATOM;
|
||
|
f->status |= L_ATOM;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
walk_atomic(Element *a, Element *b, int added)
|
||
|
{ Element *f; Symbol *ofn; int oln;
|
||
|
SeqList *h;
|
||
|
|
||
|
ofn = Fname;
|
||
|
oln = lineno;
|
||
|
for (f = a; ; f = f->nxt)
|
||
|
{ f->status |= (ATOM|added);
|
||
|
switch (f->n->ntyp) {
|
||
|
case ATOMIC:
|
||
|
if (verbose&32)
|
||
|
printf("spin: warning, line %3d %s, atomic inside %s (ignored)\n",
|
||
|
f->n->ln, f->n->fn->name, (added)?"d_step":"atomic");
|
||
|
goto mknonat;
|
||
|
case D_STEP:
|
||
|
if (!(verbose&32))
|
||
|
{ if (added) goto mknonat;
|
||
|
break;
|
||
|
}
|
||
|
printf("spin: warning, line %3d %s, d_step inside ",
|
||
|
f->n->ln, f->n->fn->name);
|
||
|
if (added)
|
||
|
{ printf("d_step (ignored)\n");
|
||
|
goto mknonat;
|
||
|
}
|
||
|
printf("atomic\n");
|
||
|
break;
|
||
|
case NON_ATOMIC:
|
||
|
mknonat: f->n->ntyp = NON_ATOMIC; /* can jump here */
|
||
|
h = f->n->sl;
|
||
|
walk_atomic(h->this->frst, h->this->last, added);
|
||
|
break;
|
||
|
case UNLESS:
|
||
|
if (added)
|
||
|
{ printf("spin: error, line %3d %s, unless in d_step (ignored)\n",
|
||
|
f->n->ln, f->n->fn->name);
|
||
|
}
|
||
|
}
|
||
|
for (h = f->sub; h; h = h->nxt)
|
||
|
walk_atomic(h->this->frst, h->this->last, added);
|
||
|
if (f == b)
|
||
|
break;
|
||
|
}
|
||
|
Fname = ofn;
|
||
|
lineno = oln;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
dumplabels(void)
|
||
|
{ Label *l;
|
||
|
|
||
|
for (l = labtab; l; l = l->nxt)
|
||
|
if (l->c != 0 && l->s->name[0] != ':')
|
||
|
printf("label %s %d <%s>\n",
|
||
|
l->s->name, l->e->seqno, l->c->name);
|
||
|
}
|