contrib/gcc/df-problems.c

201 /* Dump a def-use or use-def chain for REF to FILE.  */
288    Find the locations in the function where each use site for a pseudo
306    built on demand.  This bitvector contains a 1 for each use or reg
312    for the register.  The confluence and transfer functions use
507 				    struct df_ref *use,
510   while (use)
512       if (top_flag == (DF_REF_FLAGS (use) & DF_REF_AT_TOP))
514 	  /* Add use to set of gens in this BB unless we have seen a
516 	  unsigned int regno = DF_REF_REGNO (use);
518 	    bitmap_set_bit (bb_info->gen, DF_REF_ID (use));
520       use = use->next_ref;
524 /* Compute local reaching use (upward exposed use) info for basic
574 /* Compute local reaching use (upward exposed use) info for each basic
969   /* Because of the clustering of all use sites for the same pseudo,
1372    Find the locations in the function where any use of a pseudo can
1407       BITMAP_FREE (bb_info->use);
1438 	  bitmap_clear (bb_info->use);
1444 	  bb_info->use = BITMAP_ALLOC (NULL);
1463   struct df_ref *use;
1472 	bitmap_clear_bit (bb_info->use, dregno);
1476   for (use = df_get_artificial_uses (df, bb_index); use; use = use->next_ref)
1477     /* Add use to set of uses in this BB.  */
1478     if ((DF_REF_FLAGS (use) & DF_REF_AT_TOP) == 0)
1479       bitmap_set_bit (bb_info->use, DF_REF_REGNO (use));
1506 		      bitmap_clear_bit (bb_info->use, dregno);
1531 		  bitmap_clear_bit (bb_info->use, dregno);
1536       for (use = DF_INSN_UID_USES (df, uid); use; use = use->next_ref)
1537 	/* Add use to set of uses in this BB.  */
1538 	bitmap_set_bit (bb_info->use, DF_REF_REGNO (use));
1548 	bitmap_clear_bit (bb_info->use, dregno);
1553   for (use = df_get_artificial_uses (df, bb_index); use; use = use->next_ref)
1554     /* Add use to set of uses in this BB.  */
1555     if (DF_REF_FLAGS (use) & DF_REF_AT_TOP)
1556       bitmap_set_bit (bb_info->use, DF_REF_REGNO (use));
1610       bitmap_copy (bb_info->use, df->exit_block_uses);
1633       bitmap_copy (bb_info->in, bb_info->use);
1681   bitmap use = bb_info->use;
1684   return bitmap_ior_and_compl (in, use, out, def);
1701 	      BITMAP_FREE (bb_info->use);
1739       fprintf (file, "  use \t");
1740       dump_bitmap (file, bb_info->use);
2004 	 set and then use that to knock bits out of ur_out.  */
2363 		  /* We use VEC_quick_push here because
2584 	  /* We can not use the same stack register for uninitialized
2605 	 set and then use that to knock bits out of ur_out.  */
2761 /* Create def-use or use-def chains.  */
2879       struct df_ref *use;
2880       use = df_get_artificial_uses (df, bb_index);
2881       while (use)
2883 	  use->chain = NULL;
2884 	  use = use->next_ref;
2914 				struct df_ref *use,
2921   while (use)
2924       unsigned int uregno = DF_REF_REGNO (use);
2928 	  if (top_flag == (DF_REF_FLAGS (use) & DF_REF_AT_TOP))
2941 		    df_chain_create (dflow, def, use);
2943 		    df_chain_create (dflow, use, def);
2947       use = use->next_ref;
2951 /* Reset the storage pool that the def-use or use-def chains have been
3028 /* Create def-use chains from reaching use bitmaps for basic blocks
3066       fprintf (file, "Def-use chains:\n");
3092 	  struct df_ref *use = DF_USES_GET (df, j);
3093 	  if (use)
3096 		       j, DF_REF_BBNO (use),
3097 		       DF_REF_INSN (use) ?
3098 		       DF_INSN_LUID (df, DF_REF_INSN (use))
3103 		       DF_REF_REGNO (use));
3104 	      if (use->flags & DF_REF_READ_WRITE)
3106 	      if (use->flags & DF_REF_STRIPPED)
3108 	      if (use->flags & DF_REF_IN_NOTE)
3110 	      df_chain_dump (DF_REF_CHAIN (use), file);
3332 /* Set the REG_DEAD notes for the multiword hardreg use in INSN based
3502   struct df_ref *use;
3524   for (use = df_get_artificial_uses (df, bb_index); use; use = use->next_ref)
3525     if ((DF_REF_FLAGS (use) & DF_REF_AT_TOP) == 0)
3527 	unsigned int regno = DF_REF_REGNO (use);
3635       for (use = DF_INSN_UID_USES (df, uid); use; use = use->next_ref)
3637 	  unsigned int uregno = DF_REF_REGNO (use);
3649 	  fprintf (stderr, "  regular looking at use ");
3650 	  df_ref_debug (use, stderr);
3654 	      if ( (!(DF_REF_FLAGS (use) & DF_REF_MW_HARDREG))
3657 		   && (!(DF_REF_FLAGS (use) & DF_REF_READ_WRITE))
3660 		  rtx reg = GET_CODE (*DF_REF_LOC (use)) == SUBREG ?
3661 		    SUBREG_REG (*DF_REF_LOC (use)) : *DF_REF_LOC (use);