basic-block.h: Update the prototypes of cached_make_edge and rtl_make_eh_edge.

	* basic-block.h: Update the prototypes of cached_make_edge and
	rtl_make_eh_edge.
	* cfg.c (cached_make_edge): Take edge_cache representing one
	row of the adjacency matrix of edges.
	* cfgbuild.c (make_label_edge, rtl_make_eh_edge): Likewise.
	(make_edges): Initialize edge_cache to represent one row of
	the adjacency matrix of edges.

From-SVN: r96440

gcc/ChangeLog

+2005-03-14  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* basic-block.h: Update the prototypes of cached_make_edge and
+	rtl_make_eh_edge.
+	* cfg.c (cached_make_edge): Take edge_cache representing one
+	row of the adjacency matrix of edges.
+	* cfgbuild.c (make_label_edge, rtl_make_eh_edge): Likewise.
+	(make_edges): Initialize edge_cache to represent one row of
+	the adjacency matrix of edges.
+
 2005-03-14  Zdenek Dvorak  <dvorakz@suse.cz>
 
 	* tree-ssa-phiopt.c (minmax_replacement, blocks_in_phiopt_order):

gcc/basic-block.h

@@ -449,7 +449,7 @@ extern void remove_fake_exit_edges (void);
 extern void add_noreturn_fake_exit_edges (void);
 extern void connect_infinite_loops_to_exit (void);
 extern edge unchecked_make_edge (basic_block, basic_block, int);
-extern edge cached_make_edge (sbitmap *, basic_block, basic_block, int);
+extern edge cached_make_edge (sbitmap, basic_block, basic_block, int);
 extern edge make_edge (basic_block, basic_block, int);
 extern edge make_single_succ_edge (basic_block, basic_block, int);
 extern void remove_edge (edge);
@@ -817,7 +817,7 @@ extern bool forwarder_block_p (basic_block);
 extern bool purge_all_dead_edges (int);
 extern bool purge_dead_edges (basic_block);
 extern void find_many_sub_basic_blocks (sbitmap);
-extern void rtl_make_eh_edge (sbitmap *, basic_block, rtx);
+extern void rtl_make_eh_edge (sbitmap, basic_block, rtx);
 extern bool can_fallthru (basic_block, basic_block);
 extern bool could_fall_through (basic_block, basic_block);
 extern void flow_nodes_print (const char *, const sbitmap, FILE *);

gcc/cfg.c

@@ -327,7 +327,7 @@ unchecked_make_edge (basic_block src, basic_block dst, int flags)
    edge cache CACHE.  Return the new edge, NULL if already exist.  */
 
 edge
-cached_make_edge (sbitmap *edge_cache, basic_block src, basic_block dst, int flags)
+cached_make_edge (sbitmap edge_cache, basic_block src, basic_block dst, int flags)
 {
   if (edge_cache == NULL
       || src == ENTRY_BLOCK_PTR
@@ -335,11 +335,11 @@ cached_make_edge (sbitmap *edge_cache, basic_block src, basic_block dst, int fla
     return make_edge (src, dst, flags);
 
   /* Does the requested edge already exist?  */
-  if (! TEST_BIT (edge_cache[src->index], dst->index))
+  if (! TEST_BIT (edge_cache, dst->index))
     {
       /* The edge does not exist.  Create one and update the
 	 cache.  */
-      SET_BIT (edge_cache[src->index], dst->index);
+      SET_BIT (edge_cache, dst->index);
       return unchecked_make_edge (src, dst, flags);
     }
 

gcc/cfgbuild.c

@@ -49,7 +49,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 static int count_basic_blocks (rtx);
 static void find_basic_blocks_1 (rtx);
 static void make_edges (basic_block, basic_block, int);
-static void make_label_edge (sbitmap *, basic_block, rtx, int);
+static void make_label_edge (sbitmap, basic_block, rtx, int);
 static void find_bb_boundaries (basic_block);
 static void compute_outgoing_frequencies (basic_block);
 
@@ -179,7 +179,7 @@ count_basic_blocks (rtx f)
 /* Create an edge from a basic block to a label.  */
 
 static void
-make_label_edge (sbitmap *edge_cache, basic_block src, rtx label, int flags)
+make_label_edge (sbitmap edge_cache, basic_block src, rtx label, int flags)
 {
   gcc_assert (LABEL_P (label));
 
@@ -197,7 +197,7 @@ make_label_edge (sbitmap *edge_cache, basic_block src, rtx label, int flags)
 /* Create the edges generated by INSN in REGION.  */
 
 void
-rtl_make_eh_edge (sbitmap *edge_cache, basic_block src, rtx insn)
+rtl_make_eh_edge (sbitmap edge_cache, basic_block src, rtx insn)
 {
   int is_call = CALL_P (insn) ? EDGE_ABNORMAL_CALL : 0;
   rtx handlers, i;
@@ -233,46 +233,41 @@ static void
 make_edges (basic_block min, basic_block max, int update_p)
 {
   basic_block bb;
-  sbitmap *edge_cache = NULL;
+  sbitmap edge_cache = NULL;
 
   /* Heavy use of computed goto in machine-generated code can lead to
      nearly fully-connected CFGs.  In that case we spend a significant
      amount of time searching the edge lists for duplicates.  */
   if (forced_labels || cfun->max_jumptable_ents > 100)
-    {
-      edge_cache = sbitmap_vector_alloc (last_basic_block, last_basic_block);
-      sbitmap_vector_zero (edge_cache, last_basic_block);
-
-      if (update_p)
-	{
-	  FOR_BB_BETWEEN (bb, min, max->next_bb, next_bb)
-	    if (STATE (bb) != BLOCK_ORIGINAL)
-	      {
-		edge e;
-		edge_iterator ei;
-		
-		FOR_EACH_EDGE (e, ei, bb->succs)
-		  if (e->dest != EXIT_BLOCK_PTR)
-		    SET_BIT (edge_cache[bb->index], e->dest->index);
-	      }
-	}
-    }
+    edge_cache = sbitmap_alloc (last_basic_block);
 
   /* By nature of the way these get numbered, ENTRY_BLOCK_PTR->next_bb block
      is always the entry.  */
   if (min == ENTRY_BLOCK_PTR->next_bb)
-    cached_make_edge (edge_cache, ENTRY_BLOCK_PTR, min,
-		      EDGE_FALLTHRU);
+    make_edge (ENTRY_BLOCK_PTR, min, EDGE_FALLTHRU);
 
   FOR_BB_BETWEEN (bb, min, max->next_bb, next_bb)
     {
       rtx insn, x;
       enum rtx_code code;
       edge e;
+      edge_iterator ei;
 
       if (STATE (bb) == BLOCK_ORIGINAL)
 	continue;
 
+      /* If we have an edge cache, cache edges going out of BB.  */
+      if (edge_cache)
+	{
+	  sbitmap_zero (edge_cache);
+	  if (update_p)
+	    {
+	      FOR_EACH_EDGE (e, ei, bb->succs)
+		if (e->dest != EXIT_BLOCK_PTR)
+		  SET_BIT (edge_cache, e->dest->index);
+	    }
+	}
+
       if (LABEL_P (BB_HEAD (bb))
 	  && LABEL_ALT_ENTRY_P (BB_HEAD (bb)))
 	cached_make_edge (NULL, ENTRY_BLOCK_PTR, bb, 0);