revert: [multiple changes]

2013-01-03  Richard Biener  <rguenther@suse.de>

        Revert
        2013-01-03  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/55857
        * tree-vect-stmts.c (vectorizable_load): Do not setup
        re-alignment for invariant loads.

        2013-01-02  Richard Biener  <rguenther@suse.de>

        * tree-vect-stmts.c (vectorizable_load): When vectorizing an
        invariant load do not generate a vector load from the scalar
        location.

From-SVN: r194856

gcc/ChangeLog

 2013-01-03  Richard Biener  <rguenther@suse.de>
 
+	Revert
+	2013-01-03  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/55857
+	* tree-vect-stmts.c (vectorizable_load): Do not setup
+	re-alignment for invariant loads.
+
+	2013-01-02  Richard Biener  <rguenther@suse.de>
+
+	* tree-vect-stmts.c (vectorizable_load): When vectorizing an
+	invariant load do not generate a vector load from the scalar
+	location.
+
+2013-01-03  Richard Biener  <rguenther@suse.de>
+
 	* tree-vect-loop.c (vect_analyze_loop_form): Clarify reason
 	for not vectorizing.
 	* tree-vect-data-refs.c (vect_create_addr_base_for_vector_ref): Do

gcc/tree-vect-stmts.c

@@ -4927,8 +4927,7 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
 
   if ((alignment_support_scheme == dr_explicit_realign_optimized
        || alignment_support_scheme == dr_explicit_realign)
-      && !compute_in_loop
-      && !integer_zerop (DR_STEP (dr)))
+      && !compute_in_loop)
     {
       msq = vect_setup_realignment (first_stmt, gsi, &realignment_token,
 				    alignment_support_scheme, NULL_TREE,
@@ -4989,19 +4988,6 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
 	  /* Record the mapping between SSA_NAMEs and statements.  */
 	  vect_record_grouped_load_vectors (stmt, dr_chain);
 	}
-      /* Handle invariant-load.  */
-      else if (inv_p && !bb_vinfo)
-	{
-	  gimple_stmt_iterator gsi2 = *gsi;
-	  gcc_assert (!grouped_load && !slp_perm);
-	  gsi_next (&gsi2);
-	  new_temp = vect_init_vector (stmt, scalar_dest,
-				       vectype, &gsi2);
-	  new_stmt = SSA_NAME_DEF_STMT (new_temp);
-	  /* Store vector loads in the corresponding SLP_NODE.  */
-	  if (slp)
-	    SLP_TREE_VEC_STMTS (slp_node).quick_push (new_stmt);
-	}
       else
 	{
 	  for (i = 0; i < vec_num; i++)
@@ -5149,6 +5135,17 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
 		    }
 		}
 
+	      /* 4. Handle invariant-load.  */
+	      if (inv_p && !bb_vinfo)
+		{
+		  gimple_stmt_iterator gsi2 = *gsi;
+		  gcc_assert (!grouped_load);
+		  gsi_next (&gsi2);
+		  new_temp = vect_init_vector (stmt, scalar_dest,
+					       vectype, &gsi2);
+		  new_stmt = SSA_NAME_DEF_STMT (new_temp);
+		}
+
 	      if (negative)
 		{
 		  tree perm_mask = perm_mask_for_reverse (vectype);