profile.c (branch_prob): Fix .bbg info for computed gotos and C++ EH code.

        * profile.c (branch_prob): Fix .bbg info for computed gotos
        and C++ EH code.

From-SVN: r43942

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7093a5c048808f35aca7c862d1574bf71da420a0..f46d051a334bc6ea823609758585f224f02b4c2e 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2001-07-11  Janis Johnson <janis@us.ibm.com>
+
+       * profile.c (branch_prob): Fix .bbg info for computed gotos
+       and C++ EH code.
+
 2001-07-11  Mark Mitchell  <mark@codesourcery.com>
 
        * stmt.c (parse_output_constraint): New function, split out 

diff --git a/gcc/profile.c b/gcc/profile.c
index 37fe3c2e707b1970b742f20de33635f94f9f5701..fd03d4be07416f9e45641870643da6fd0d9032f3 100644 (file)
--- a/gcc/profile.c
+++ b/gcc/profile.c
@@ -100,6 +100,7 @@ int count_instrumented_edges;
 
 static int total_num_blocks;
 static int total_num_edges;
+static int total_num_edges_ignored;
 static int total_num_edges_instrumented;
 static int total_num_blocks_created;
 static int total_num_passes;
@@ -539,7 +540,7 @@ void
 branch_prob ()
 {
   int i;
-  int num_edges;
+  int num_edges, ignored_edges;
   struct edge_info *edge_infos;
   struct edge_list *el;
 
@@ -626,6 +627,7 @@ branch_prob ()
   edge_infos = (struct edge_info *)
     xcalloc (num_edges, sizeof (struct edge_info));
 
+  ignored_edges = 0;
   for (i = 0 ; i < num_edges ; i++)
     {
       edge e = INDEX_EDGE (el, i);
@@ -635,17 +637,12 @@ branch_prob ()
       /* Mark edges we've replaced by fake edges above as ignored.  */
       if ((e->flags & (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL))
          && e->src != ENTRY_BLOCK_PTR && e->dest != EXIT_BLOCK_PTR)
-       EDGE_INFO (e)->ignore = 1;
+        {
+         EDGE_INFO (e)->ignore = 1;
+         ignored_edges++;
+        }
     }
 
-  total_num_blocks += n_basic_blocks + 2;
-  if (rtl_dump_file)
-    fprintf (rtl_dump_file, "%d basic blocks\n", n_basic_blocks);
-
-  total_num_edges += num_edges;
-  if (rtl_dump_file)
-    fprintf (rtl_dump_file, "%d edges\n", num_edges);
-
 #ifdef ENABLE_CHECKING
   verify_flow_info ();
 #endif
@@ -722,6 +719,31 @@ branch_prob ()
 
   find_spanning_tree (el);
 
+  /* Fake edges that are not on the tree will not be instrumented, so
+     mark them ignored. */
+  for (i = 0; i < num_edges; i++)
+    {
+      edge e = INDEX_EDGE (el, i);
+      struct edge_info *inf = EDGE_INFO (e);
+      if ((e->flags & EDGE_FAKE) && !inf->ignore && !inf->on_tree)
+        {
+          inf->ignore = 1;
+          ignored_edges++;
+        }
+    }
+
+  total_num_blocks += n_basic_blocks + 2;
+  if (rtl_dump_file)
+    fprintf (rtl_dump_file, "%d basic blocks\n", n_basic_blocks);
+
+  total_num_edges += num_edges;
+  if (rtl_dump_file)
+    fprintf (rtl_dump_file, "%d edges\n", num_edges);
+
+  total_num_edges_ignored += ignored_edges;
+  if (rtl_dump_file)
+    fprintf (rtl_dump_file, "%d ignored edges\n", ignored_edges);
+
   /* Create a .bbg file from which gcov can reconstruct the basic block
      graph.  First output the number of basic blocks, and then for every
      edge output the source and target basic block numbers.
@@ -733,7 +755,7 @@ branch_prob ()
 
       /* The plus 2 stands for entry and exit block.  */
       __write_long (n_basic_blocks + 2, bbg_file, 4);
-      __write_long (num_edges + 1, bbg_file, 4);
+      __write_long (num_edges - ignored_edges + 1, bbg_file, 4);
 
       for (i = 0; i < n_basic_blocks + 1; i++)
        {
@@ -754,7 +776,7 @@ branch_prob ()
                  flag_bits = 0;
                  if (i->on_tree)
                    flag_bits |= 0x1;
-                 if (e->flags & EDGE_ABNORMAL)
+                 if (e->flags & EDGE_FAKE)
                    flag_bits |= 0x2;
                  if (e->flags & EDGE_FALLTHRU)
                    flag_bits |= 0x4;
@@ -950,6 +972,7 @@ init_branch_prob (filename)
 
   total_num_blocks = 0;
   total_num_edges = 0;
+  total_num_edges_ignored = 0;
   total_num_edges_instrumented = 0;
   total_num_blocks_created = 0;
   total_num_passes = 0;
@@ -995,6 +1018,8 @@ end_branch_prob ()
       fprintf (rtl_dump_file, "Total number of blocks: %d\n",
               total_num_blocks);
       fprintf (rtl_dump_file, "Total number of edges: %d\n", total_num_edges);
+      fprintf (rtl_dump_file, "Total number of ignored edges: %d\n",
+              total_num_edges_ignored);
       fprintf (rtl_dump_file, "Total number of instrumented edges: %d\n",
               total_num_edges_instrumented);
       fprintf (rtl_dump_file, "Total number of blocks created: %d\n",