tree-pass.h (pass_vect_dce): Declare.

        * tree-pass.h (pass_vect_dce): Declare.
        * passes.c (init_optimization_passes): Add it.
        * tree-flow.h (tree_ssa_dce): Declare.
        * tree-ssa-dce.c (tree_ssa_dce): Export.
        * tree-ssa-loop.c (tree_vectorize): Move current_loops check ...
        (gate_tree_vectorize): ... here.
        (pass_vect_dce): New.

From-SVN: r104376

gcc/ChangeLog

+2005-09-17  Richard Henderson  <rth@redhat.com>
+
+	* tree-pass.h (pass_vect_dce): Declare.
+	* passes.c (init_optimization_passes): Add it.
+	* tree-flow.h (tree_ssa_dce): Declare.
+	* tree-ssa-dce.c (tree_ssa_dce): Export.
+	* tree-ssa-loop.c (tree_vectorize): Move current_loops check ...
+	(gate_tree_vectorize): ... here.
+	(pass_vect_dce): New.
+
 2005-09-17  Jan Hubicka  <jh@suse.cz>
 
 	* except.c (struct eh_status): Turn region_array into vec.

gcc/passes.c

@@ -567,6 +567,7 @@ init_optimization_passes (void)
   NEXT_PASS (pass_iv_canon);
   NEXT_PASS (pass_if_conversion);
   NEXT_PASS (pass_vectorize);
+  NEXT_PASS (pass_vect_dce);
   /* NEXT_PASS (pass_may_alias) cannot be done again because the
      vectorizer creates alias relations that are not supported by
      pass_may_alias.  */

gcc/tree-flow.h

@@ -707,6 +707,9 @@ struct tree_niter_desc
 			   the loop), then the information would be lost.  */
 };
 
+/* In tree-ssa-dce.c */
+void tree_ssa_dce (void);
+
 /* In tree-vectorizer.c */
 void vectorize_loops (struct loops *);
 

gcc/tree-pass.h

@@ -234,6 +234,7 @@ extern struct tree_opt_pass pass_empty_loop;
 extern struct tree_opt_pass pass_record_bounds;
 extern struct tree_opt_pass pass_if_conversion;
 extern struct tree_opt_pass pass_vectorize;
+extern struct tree_opt_pass pass_vect_dce;
 extern struct tree_opt_pass pass_complete_unroll;
 extern struct tree_opt_pass pass_iv_optimize;
 extern struct tree_opt_pass pass_tree_loop_done;

gcc/tree-ssa-dce.c

@@ -935,7 +935,7 @@ perform_tree_ssa_dce (bool aggressive)
 }
 
 /* Pass entry points.  */
-static void
+void
 tree_ssa_dce (void)
 {
   perform_tree_ssa_dce (/*aggressive=*/false);

gcc/tree-ssa-loop.c

@@ -188,16 +188,13 @@ struct tree_opt_pass pass_tree_unswitch =
 static void
 tree_vectorize (void)
 {
-  if (!current_loops)
-    return;
-
   vectorize_loops (current_loops);
 }
 
 static bool
 gate_tree_vectorize (void)
 {
-  return flag_tree_vectorize != 0;
+  return flag_tree_vectorize && current_loops;
 }
 
 struct tree_opt_pass pass_vectorize =
@@ -217,6 +214,26 @@ struct tree_opt_pass pass_vectorize =
   0					/* letter */
 };
 
+struct tree_opt_pass pass_vect_dce =
+{
+  "vect_dce",				/* name */
+  gate_tree_vectorize,			/* gate */
+  tree_ssa_dce,				/* execute */
+  NULL,					/* sub */
+  NULL,					/* next */
+  0,					/* static_pass_number */
+  TV_TREE_DCE,				/* tv_id */
+  PROP_cfg | PROP_ssa | PROP_alias,	/* properties_required */
+  0,					/* properties_provided */
+  0,					/* properties_destroyed */
+  0,					/* todo_flags_start */
+  TODO_dump_func 
+    | TODO_update_ssa_no_phi 
+    | TODO_cleanup_cfg
+    | TODO_ggc_collect
+    | TODO_verify_ssa,			/* todo_flags_finish */
+  0					/* letter */
+};
 
 /* Loop nest optimizations.  */