df-problems.c (df_kill_notes): Split up in two functions.

	* df-problems.c (df_kill_notes): Split up in two functions.
	(df_remove_dead_and_unused_notes): New function, first half of
	df_kill notes to remove all REG_DEAD and REG_UNUSED notes.
	(df_remove_dead_eq_notes): New function, second half of df_kill_notes
	to remove REG_EQUAL and REG_EQUIV notes referring to dead registers.
	(df_note_bb_compute): Call df_remove_dead_and_unused_notes instead
	of df_kill_notes.  Call df_remove_dead_eq_notes after processing insn.

	* web.c (web): Re-add DF_RD_PRUNE_DEAD_DEFS;

From-SVN: r192526

1 files changed, 1 insertions, 2 deletions

diff --git a/gcc/web.c b/gcc/web.c
index 2816681..d565634 100644
--- a/gcc/web.c
+++ b/gcc/web.c
@@ -336,8 +336,7 @@ web_main (void)
   rtx insn;
 
   df_set_flags (DF_NO_HARD_REGS + DF_EQ_NOTES);
-  /* We can not RD_PRUNE_DEAD_DEFS, because we care about REG_EQUAL
-     notes.  */
+  df_set_flags (DF_RD_PRUNE_DEAD_DEFS);
   df_chain_add_problem (DF_UD_CHAIN);
   df_analyze ();
   df_set_flags (DF_DEFER_INSN_RESCAN);