contrib/gcc/df-core.c

50       df_set_blocks (df, blocks);
52       df_rescan_blocks (df, blocks);
100 contains those blocks and any edges that occur directly between the
101 blocks in the set.  Care should be taken to call df_set_blocks right
103 optimizations that reorder blocks invalidate the bitvector.
108  (re)run over the set of blocks passed in.  If blocks is NULL, the entire
109 function (or all of the blocks defined in df_set_blocks) is rescanned.
110 If blocks contains blocks that were not defined in the call to
111 df_set_blocks, these blocks are added to the set of blocks.
115 does not cause blocks to be (re)scanned at the rtl level unless no
165 blocks over with to resolve the iteration.  In general, restarting a
204    ARTIFICIAL refs are associated with basic blocks.  The heads of
210    Artificial defs and uses occur both at the beginning and ends of blocks.
212      For blocks that area at the destination of eh edges, the
220      Artificial uses occur at the end of all blocks.  These arise from
387 /* Set the blocks that are to be considered for analysis.  If this is
392 df_set_blocks (struct df *df, bitmap blocks)
394   if (blocks)
400 	  bitmap_and_compl (diff, df->blocks_to_analyze, blocks);
457       bitmap_copy (df->blocks_to_analyze, blocks);
624    cfg induced by blocks in DATAFLOW->order is taken into account.
627    blocks.  */
713 df_prune_to_subcfg (int list[], unsigned len, bitmap blocks)
718     if (bitmap_bit_p (blocks, list[act]))
727    There are three sets of blocks passed in:
729    BLOCKS_TO_CONSIDER are the blocks whose solution can either be
731    the set of blocks that has been passed to DF_SET_BLOCKS.  For calls
733    blocks in the fringe (the set of blocks passed in plus the set of
734    immed preds and succs of those blocks).
736    BLOCKS_TO_INIT are the blocks whose solution will be changed by
738    blocks that has been passed to DF_SET_BLOCKS.  For calls from
739    DF_ANALYZE_SIMPLE_CHANGE_SOME_BLOCKS, this is the set of blocks
742    BLOCKS_TO_SCAN are the set of blocks that need to be rescanned.
743    For calls from DF_ANALYZE, this is the accumulated set of blocks
746    this is the set of blocks passed in.
783 /* Analyze dataflow info for the basic blocks specified by the bitmap
807   /* Make sure that we have pruned any unreachable blocks from these
904 	     These are from orphaned blocks.  */