tree-if-conv.c (tree_if_conversion): Move call to ifcvt_local_dce after local CSE.

2019-10-01  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	* tree-if-conv.c (tree_if_conversion): Move call to ifcvt_local_dce
	after local CSE.

From-SVN: r276417

gcc/ChangeLog

+2019-10-01  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
+
+	* tree-if-conv.c (tree_if_conversion): Move call to ifcvt_local_dce
+	after local CSE.
+
 2019-10-01  Jan Hubicka  <hubicka@ucw.cz>
 
 	* doc/invoke.texi (early-inlining-insns-O2): Document.

gcc/tree-if-conv.c

@@ -3060,9 +3060,6 @@ tree_if_conversion (class loop *loop, vec<gimple *> *preds)
      on-the-fly.  */
   combine_blocks (loop);
 
-  /* Delete dead predicate computations.  */
-  ifcvt_local_dce (loop->header);
-
   /* Perform local CSE, this esp. helps the vectorizer analysis if loads
      and stores are involved.  CSE only the loop body, not the entry
      PHIs, those are to be kept in sync with the non-if-converted copy.
@@ -3071,6 +3068,9 @@ tree_if_conversion (class loop *loop, vec<gimple *> *preds)
   bitmap_set_bit (exit_bbs, single_exit (loop)->dest->index);
   bitmap_set_bit (exit_bbs, loop->latch->index);
   todo |= do_rpo_vn (cfun, loop_preheader_edge (loop), exit_bbs);
+
+  /* Delete dead predicate computations.  */
+  ifcvt_local_dce (loop->header);
   BITMAP_FREE (exit_bbs);
 
   todo |= TODO_cleanup_cfg;