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Date: Wed, 18 Sep 2019 14:42:35 +0200 (CEST)
From: Richard Biener <rguenther@suse.de>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH] Remove dead code
Message-ID: <nycvar.YFH.7.76.1909181441560.5566@zhemvz.fhfr.qr>
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This removes dead code from the vectorizer and makes a function static.

Bootstrapped / tested on x86_64-unknown-linux-gnu, applied.

Richard.

2019-09-18  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (get_initial_def_for_reduction): Remove.
	* tree-vect-loop.c (get_initial_def_for_reduction): Make
	static.
	(vect_create_epilog_for_reduction): Remove dead code.

Index: gcc/tree-vect-loop.c
===================================================================
--- gcc/tree-vect-loop.c	(revision 275873)
+++ gcc/tree-vect-loop.c	(working copy)
@@ -4203,7 +4203,7 @@ vect_model_induction_cost (stmt_vec_info
 
    A cost model should help decide between these two schemes.  */
 
-tree
+static tree
 get_initial_def_for_reduction (stmt_vec_info stmt_vinfo, tree init_val,
                                tree *adjustment_def)
 {
@@ -4585,7 +4585,6 @@ vect_create_epilog_for_reduction (vec<tr
      (in case of SLP, do it for all the phis). */
 
   /* Get the loop-entry arguments.  */
-  enum vect_def_type initial_def_dt = vect_unknown_def_type;
   if (slp_node)
     {
       unsigned vec_num = SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node);
@@ -4623,7 +4622,6 @@ vect_create_epilog_for_reduction (vec<tr
 	{
 	  /* Do not use an adjustment def as that case is not supported
 	     correctly if ncopies is not one.  */
-	  vect_is_simple_use (initial_def, loop_vinfo, &initial_def_dt);
 	  vec_initial_def = vect_get_vec_def_for_operand (initial_def,
 							  stmt_info);
 	}
Index: gcc/tree-vectorizer.h
===================================================================
--- gcc/tree-vectorizer.h	(revision 275873)
+++ gcc/tree-vectorizer.h	(working copy)
@@ -1645,7 +1645,6 @@ extern bool vectorizable_reduction (stmt
 extern bool vectorizable_induction (stmt_vec_info, gimple_stmt_iterator *,
 				    stmt_vec_info *, slp_tree,
 				    stmt_vector_for_cost *);
-extern tree get_initial_def_for_reduction (stmt_vec_info, tree, tree *);
 extern bool vect_worthwhile_without_simd_p (vec_info *, tree_code);
 extern int vect_get_known_peeling_cost (loop_vec_info, int, int *,
 					stmt_vector_for_cost *,