Line 1501... |
Line 1501... |
//print_cuc_bb (n, "preunroll");
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//print_cuc_bb (n, "preunroll");
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free (counts);
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free (counts);
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return n;
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return n;
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}
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}
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/* Marks successor of b with mask m */
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static void mark_successors (cuc_func *f, int b, int m, int stopb)
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{
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if (b < 0 || b == BBID_END) return;
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if (f->bb[b].tmp & m) return;
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f->bb[b].tmp |= m;
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/* mark stopb also; and stop searching -- we will gen new result in stopb */
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if (b == stopb) return;
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mark_successors (f, f->bb[b].next[0], m, stopb);
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mark_successors (f, f->bb[b].next[1], m, stopb);
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}
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static unsigned long mask (unsigned long c)
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{
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if (c) return (1 << (log2 (c) + 1)) - 1;
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else return 0;
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}
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/* Calculates facts, that are determined by conditionals */
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void insert_conditional_facts (cuc_func *f)
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{
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int b, i, j;
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int b1, i1, j1;
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cuc_insn n[2];
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for (b = 0; b < f->num_bb; b++) if (f->bb[b].ninsn > 0) {
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cuc_insn *ii = &f->bb[b].insn[f->bb[b].ninsn - 1];
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if (ii->type & IT_BRANCH && ii->opt[1] & OPT_REF && REF_BB(ii->op[1]) == b
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&& f->INSN(ii->op[1]).opt[2] & OPT_CONST) {
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int ok = 1;
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unsigned long c = f->INSN(ii->op[1]).op[2];
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int rref = f->INSN(ii->op[1]).op[1];
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unsigned long r;
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if (!(f->INSN(ii->op[1]).opt[1] & OPT_REF)) continue;
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r = f->INSN(rref).op[0];
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for (j = 0; j < 2; j++) {
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change_insn_type (&n[j], II_ADD);
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n[j].type = 0;
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n[j].dep = NULL;
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n[j].op[0] = r; n[j].opt[0] = OPT_REGISTER | OPT_DEST;
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n[j].op[1] = 0; n[j].opt[1] = OPT_CONST;
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n[j].op[2] = rref; n[j].opt[2] = OPT_REF;
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n[j].opt[3] = OPT_NONE;
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sprintf (n[j].disasm, "conditional %s fact", j ? "false" : "true");
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}
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/* First get the conditional and two instruction to place after the current BB */
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switch (f->INSN(ii->op[1]).index) {
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case II_SFEQ:
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change_insn_type (&n[0], II_ADD);
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n[0].op[0] = r; n[0].opt[0] = OPT_REGISTER | OPT_DEST;
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n[0].op[1] = 0; n[0].opt[1] = OPT_CONST;
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n[0].op[2] = c; n[0].opt[2] = OPT_CONST;
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break;
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case II_SFNE:
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change_insn_type (&n[1], II_ADD);
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n[1].op[0] = r; n[1].opt[0] = OPT_REGISTER | OPT_DEST;
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n[1].op[1] = 0; n[1].opt[1] = OPT_CONST;
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n[1].op[2] = c; n[1].opt[2] = OPT_CONST;
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break;
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case II_SFLT:
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change_insn_type (&n[0], II_AND);
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n[0].op[0] = r; n[0].opt[0] = OPT_REGISTER | OPT_DEST;
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n[0].op[1] = rref; n[0].opt[1] = OPT_REF;
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n[0].op[2] = mask (c); n[0].opt[2] = OPT_CONST;
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break;
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case II_SFGT:
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change_insn_type (&n[1], II_ADD);
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n[1].op[0] = r; n[1].opt[0] = OPT_REGISTER | OPT_DEST;
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n[1].op[1] = rref; n[1].opt[1] = OPT_REF;
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n[1].op[2] = mask (c + 1); n[1].opt[2] = OPT_CONST;
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break;
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case II_SFLE:
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change_insn_type (&n[0], II_AND);
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n[0].op[0] = r; n[0].opt[0] = OPT_REGISTER | OPT_DEST;
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n[0].op[1] = rref; n[0].opt[1] = OPT_REF;
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n[0].op[2] = mask (c); n[0].opt[2] = OPT_CONST;
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break;
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case II_SFGE:
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change_insn_type (&n[1], II_ADD);
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n[1].op[0] = r; n[1].opt[0] = OPT_REGISTER | OPT_DEST;
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n[1].op[1] = rref; n[1].opt[1] = OPT_REF;
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n[1].op[2] = mask (c + 1); n[1].opt[2] = OPT_CONST;
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break;
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default:
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ok = 0;
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break;
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}
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/* Now add two BBs at the end and relink */
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if (ok) {
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for (j = 0; j < 2; j++) {
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int nb = f->num_bb++;
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int sb;
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assert (nb < MAX_BB);
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f->bb[nb].type = 0;
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f->bb[nb].first = -1; f->bb[nb].last = -1;
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f->bb[nb].prev[0] = b; f->bb[nb].prev[1] = -1;
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sb = f->bb[nb].next[0] = f->bb[b].next[j]; f->bb[nb].next[1] = -1;
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printf ("%x %x %x\n", b, sb, nb);
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assert (sb >= 0);
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f->bb[b].next[j] = nb;
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if (sb != BBID_END) {
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if (f->bb[sb].prev[0] == b) f->bb[sb].prev[0] = nb;
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else if (f->bb[sb].prev[1] == b) f->bb[sb].prev[1] = nb;
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else assert (0);
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}
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f->bb[nb].insn = (cuc_insn *) malloc (sizeof (cuc_insn));
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f->bb[nb].insn[0] = n[j];
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f->bb[nb].ninsn = 1;
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f->bb[nb].mdep = NULL;
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f->bb[nb].nmemory = 0;
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f->bb[nb].cnt = 0;
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f->bb[nb].unrolled = 0;
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f->bb[nb].ntim = 0;
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f->bb[nb].selected_tim = -1;
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}
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for (b1 = 0; b1 < f->num_bb; b1++) f->bb[b1].tmp = 0;
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/* Find successor blocks and change links accordingly */
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mark_successors (f, f->num_bb - 2, 2, b);
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mark_successors (f, f->num_bb - 1, 1, b);
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for (b1 = 0; b1 < f->num_bb - 2; b1++) if (f->bb[b1].tmp == 1 || f->bb[b1].tmp == 2) {
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int end;
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if (REF_BB (rref) == b1) end = REF_I (rref);
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else end = f->bb[b1].ninsn;
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for (i1 = 0; i1 < end; i1++)
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for (j1 = 0; j1 < MAX_OPERANDS; j1++)
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if (f->bb[b1].insn[i1].opt[j1] & OPT_REF && f->bb[b1].insn[i1].op[j1] == rref)
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f->bb[b1].insn[i1].op[j1] = REF (f->num_bb - f->bb[b1].tmp, 0);
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}
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print_cuc_bb (f, "FACT");
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}
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}
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}
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}
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No newline at end of file
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No newline at end of file
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