re PR target/91982 (gcc.target/aarch64/sve/clastb_*.c tests failing with segfault)

2019-10-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91982
	* tree-vect-loop.c (vectorizable_live_operation): Also guard
	against EXTRACT_LAST_REDUCTION.
	* tree-vect-stmts.c (vect_transform_stmt): Likewise.

From-SVN: r276566

gcc/ChangeLog

+2019-10-04  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/91982
+	* tree-vect-loop.c (vectorizable_live_operation): Also guard
+	against EXTRACT_LAST_REDUCTION.
+	* tree-vect-stmts.c (vect_transform_stmt): Likewise.
+
 2019-10-04  Aldy Hernandez  <aldyh@redhat.com>
 
 	(value_range_from_overflowed_bounds): Rename from

gcc/tree-vect-loop.c

@@ -7901,7 +7901,10 @@ vectorizable_live_operation (stmt_vec_info stmt_info,
 	return true;
       if (STMT_VINFO_DEF_TYPE (stmt_info) == vect_reduction_def)
 	{
-	  if (STMT_VINFO_REDUC_TYPE (stmt_info) == FOLD_LEFT_REDUCTION)
+	  if (STMT_VINFO_REDUC_TYPE (stmt_info) == FOLD_LEFT_REDUCTION
+	      || (STMT_VINFO_REDUC_TYPE (stmt_info) == COND_REDUCTION
+		  && (STMT_VINFO_VEC_REDUCTION_TYPE (stmt_info)
+		      == EXTRACT_LAST_REDUCTION)))
 	    return true;
 	  if (slp_node)
 	    {

gcc/tree-vect-stmts.c

@@ -10897,6 +10897,9 @@ vect_transform_stmt (stmt_vec_info stmt_info, gimple_stmt_iterator *gsi,
   stmt_vec_info orig_stmt_info = vect_orig_stmt (stmt_info);
   if (!slp_node && STMT_VINFO_REDUC_DEF (orig_stmt_info)
       && STMT_VINFO_REDUC_TYPE (orig_stmt_info) != FOLD_LEFT_REDUCTION
+      && (STMT_VINFO_REDUC_TYPE (orig_stmt_info) != COND_REDUCTION
+	  || (STMT_VINFO_VEC_REDUCTION_TYPE (orig_stmt_info)
+	      != EXTRACT_LAST_REDUCTION))
       && is_a <gphi *> (STMT_VINFO_REDUC_DEF (orig_stmt_info)->stmt))
     {
       gphi *phi = as_a <gphi *> (STMT_VINFO_REDUC_DEF (orig_stmt_info)->stmt);