2017-11-17  Tamar Christina  <tamar.christina@arm.com>

	* expr.c (copy_blkmode_to_reg): Fix bitsize for targets
	with fast unaligned access.
	* doc/sourcebuild.texi (word_mode_no_slow_unalign): New.
	
gcc/testsuite/
2017-11-17  Tamar Christina  <tamar.christina@arm.com>

	* gcc.dg/struct-simple.c: New.
	* lib/target-supports.exp
	(check_effective_target_word_mode_no_slow_unalign): New.

From-SVN: r254862