re PR tree-optimization/92119 (ICE: SIGSEGV in contains_struct_check…

re PR tree-optimization/92119 (ICE: SIGSEGV in contains_struct_check (tree.h:3380) with -Os -fno-tree-dce -fno-tree-dse -ftree-slp-vectorize)

2019-10-16  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92119
	* tree-vect-patterns.c (vect_recog_rotate_pattern): Guard
	against missing bswap lhs.

From-SVN: r277057

gcc/ChangeLog

+2019-10-16  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/92119
+	* tree-vect-patterns.c (vect_recog_rotate_pattern): Guard
+	against missing bswap lhs.
+
 2019-10-16  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR middle-end/92033

gcc/tree-vect-patterns.c

@@ -2199,7 +2199,8 @@ vect_recog_rotate_pattern (stmt_vec_info stmt_vinfo, tree *type_out)
       lhs = gimple_call_lhs (last_stmt);
       oprnd0 = gimple_call_arg (last_stmt, 0);
       type = TREE_TYPE (oprnd0);
-      if (TYPE_PRECISION (TREE_TYPE (lhs)) != 16
+      if (!lhs
+	  || TYPE_PRECISION (TREE_TYPE (lhs)) != 16
 	  || TYPE_PRECISION (type) <= 16
 	  || TREE_CODE (oprnd0) != SSA_NAME
 	  || BITS_PER_UNIT != 8