cfghooks.c (split_block): Copy discriminator to new block.

	* cfghooks.c (split_block): Copy discriminator to new block.
	* tree-cfg.c (assign_discriminator): Check location of last
	instruction in block as well as first.

From-SVN: r150065

gcc/ChangeLog

+2009-07-24  Cary Coutant  <ccoutant@google.com>
+
+	* cfghooks.c (split_block): Copy discriminator to new block.
+	* tree-cfg.c (assign_discriminator): Check location of last
+	instruction in block as well as first.
+
 2009-07-24  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/linux.c: Use fputs or putc instead of fprintf

gcc/cfghooks.c

@@ -437,6 +437,7 @@ split_block (basic_block bb, void *i)
   new_bb->count = bb->count;
   new_bb->frequency = bb->frequency;
   new_bb->loop_depth = bb->loop_depth;
+  new_bb->discriminator = bb->discriminator;
 
   if (dom_info_available_p (CDI_DOMINATORS))
     {

gcc/tree-cfg.c

@@ -756,13 +756,15 @@ same_line_p (location_t locus1, location_t locus2)
 static void
 assign_discriminator (location_t locus, basic_block bb)
 {
-  gimple to_stmt;
+  gimple first_in_to_bb, last_in_to_bb;
 
   if (locus == 0 || bb->discriminator != 0)
     return;
 
-  to_stmt = first_non_label_stmt (bb);
-  if (to_stmt && same_line_p (locus, gimple_location (to_stmt)))
+  first_in_to_bb = first_non_label_stmt (bb);
+  last_in_to_bb = last_stmt (bb);
+  if (first_in_to_bb && same_line_p (locus, gimple_location (first_in_to_bb))
+      || last_in_to_bb && same_line_p (locus, gimple_location (last_in_to_bb)))
     bb->discriminator = next_discriminator_for_locus (locus);
 }