builtins.c (expand_builtin_init_descriptor): Set memory alignment.

2019-08-14  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * builtins.c (expand_builtin_init_descriptor): Set memory alignment.

From-SVN: r274487

gcc/ChangeLog

+2019-08-14  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* builtins.c (expand_builtin_init_descriptor): Set memory alignment.
+
 2019-08-14  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/91294

gcc/builtins.c

@@ -5756,6 +5756,7 @@ expand_builtin_init_descriptor (tree exp)
   r_descr = expand_normal (t_descr);
   m_descr = gen_rtx_MEM (BLKmode, r_descr);
   MEM_NOTRAP_P (m_descr) = 1;
+  set_mem_align (m_descr, GET_MODE_ALIGNMENT (ptr_mode));
 
   r_func = expand_normal (t_func);
   r_chain = expand_normal (t_chain);