* flow.c (calculate_global_regs_live): Zero bb->aux to begin.

From-SVN: r30546

gcc/ChangeLog

@@ -3,6 +3,8 @@ Mon Nov 15 20:46:45 1999  Richard Henderson  <rth@cygnus.com>
 	* alpha.c (alpha_build_va_list): Use make_lang_type and
 	initialize TYPE_NAME for the va_list record.
 
+	* flow.c (calculate_global_regs_live): Zero bb->aux to begin.
+
 Tue Nov 16 14:37:52 1999  Geoffrey Keating  <geoffk@cygnus.com>
 
 	* config/rs6000/rs6000.c (first_reg_to_save): Save

gcc/flow.c

@@ -3012,6 +3012,10 @@ calculate_global_regs_live (blocks_in, blocks_out, flags)
   qtail = queue;
   qhead = qend = queue + n_basic_blocks + 2;
 
+  /* Clear out the garbage that might be hanging out in bb->aux.  */
+  for (i = n_basic_blocks - 1; i >= 0; --i)
+    BASIC_BLOCK (i)->aux = NULL;
+
   /* Queue the blocks set in the initial mask.  Do this in reverse block
      number order so that we are more likely for the first round to do 
      useful work.  We use AUX non-null to flag that the block is queued.  */