Fix one another thinko in tree-vect-loop.c (PR tree-optimization/90973).

2019-06-26  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/90973
	* tree-vect-loop.c (vect_get_known_peeling_cost): Use
	epilogue_cost_vec instead of prologue_cost_vec for
	a epilogue cost.

From-SVN: r272671

gcc/ChangeLog

 2019-06-26  Martin Liska  <mliska@suse.cz>
 
+	PR tree-optimization/90973
+	* tree-vect-loop.c (vect_get_known_peeling_cost): Use
+	epilogue_cost_vec instead of prologue_cost_vec for
+	a epilogue cost.
+
+2019-06-26  Martin Liska  <mliska@suse.cz>
+
 	* bb-reorder.c (connect_better_edge_p): Add missing else
 	statement in the middle of if-else statements.
 

gcc/tree-vect-loop.c

@@ -3405,7 +3405,7 @@ vect_get_known_peeling_cost (loop_vec_info loop_vinfo, int peel_iters_prologue,
          iterations are unknown, count a taken branch per peeled loop.  */
       retval = record_stmt_cost (prologue_cost_vec, 1, cond_branch_taken,
 				 NULL, 0, vect_prologue);
-      retval += record_stmt_cost (prologue_cost_vec, 1, cond_branch_taken,
+      retval += record_stmt_cost (epilogue_cost_vec, 1, cond_branch_taken,
 				  NULL, 0, vect_epilogue);
     }
   else