* c-ubsan.c (ubsan_instrument_shift): Perform the MINUS_EXPR
	in unsigned type.

	* c-c++-common/ubsan/undefined-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@217216 138bc75d-0d04-0410-961f-82ee72b054a4
	* ja.po: Update.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@217221 138bc75d-0d04-0410-961f-82ee72b054a4