Remove dead code

This removes dead code left over from the reduction vectorization
refactoring last year.

2020-06-09  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vectorizable_induction): Remove dead code.

diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index f2c52ae1909a6d4e1198c640265ddce727a61061..5329982e4c9c876b188e6ca492c2dafe7ccce899 100644 (file)
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -7373,11 +7373,6 @@ vectorizable_induction (loop_vec_info loop_vinfo,
   unsigned i;
   tree expr;
   gimple_seq stmts;
-  imm_use_iterator imm_iter;
-  use_operand_p use_p;
-  gimple *exit_phi;
-  edge latch_e;
-  tree loop_arg;
   gimple_stmt_iterator si;
 
   gphi *phi = dyn_cast <gphi *> (stmt_info->stmt);
@@ -7485,9 +7480,6 @@ vectorizable_induction (loop_vec_info loop_vinfo,
   if (dump_enabled_p ())
     dump_printf_loc (MSG_NOTE, vect_location, "transform induction phi.\n");
 
-  latch_e = loop_latch_edge (iv_loop);
-  loop_arg = PHI_ARG_DEF_FROM_EDGE (phi, latch_e);
-
   step_expr = STMT_VINFO_LOOP_PHI_EVOLUTION_PART (stmt_info);
   gcc_assert (step_expr != NULL_TREE);
   tree step_vectype = get_same_sized_vectype (TREE_TYPE (step_expr), vectype);
@@ -7872,40 +7864,6 @@ vectorizable_induction (loop_vec_info loop_vinfo,
        }
     }
 
-  if (nested_in_vect_loop)
-    {
-      /* Find the loop-closed exit-phi of the induction, and record
-         the final vector of induction results:  */
-      exit_phi = NULL;
-      FOR_EACH_IMM_USE_FAST (use_p, imm_iter, loop_arg)
-        {
-         gimple *use_stmt = USE_STMT (use_p);
-         if (is_gimple_debug (use_stmt))
-           continue;
-
-         if (!flow_bb_inside_loop_p (iv_loop, gimple_bb (use_stmt)))
-           {
-             exit_phi = use_stmt;
-             break;
-           }
-        }
-      if (exit_phi)
-       {
-         stmt_vec_info stmt_vinfo = loop_vinfo->lookup_stmt (exit_phi);
-         /* FORNOW. Currently not supporting the case that an inner-loop induction
-            is not used in the outer-loop (i.e. only outside the outer-loop).  */
-         gcc_assert (STMT_VINFO_RELEVANT_P (stmt_vinfo)
-                     && !STMT_VINFO_LIVE_P (stmt_vinfo));
-
-         STMT_VINFO_VEC_STMT (stmt_vinfo) = new_stmt_info;
-         if (dump_enabled_p ())
-           dump_printf_loc (MSG_NOTE, vect_location,
-                            "vector of inductions after inner-loop:%G",
-                            new_stmt);
-       }
-    }
-
-
   if (dump_enabled_p ())
     dump_printf_loc (MSG_NOTE, vect_location,
                     "transform induction: created def-use cycle: %G%G",