backport: re PR middle-end/71626 (ICE at -O1 and above on x86_64-linux-gnu (in output...

backport: re PR middle-end/71626 (ICE at -O1 and above on x86_64-linux-gnu (in output_constant_pool_2, at varasm.c:3837))

	Backported from mainline
	2016-06-28  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/71626
	* config/i386/i386.c (ix86_expand_vector_move): For SUBREG of
	a constant, force its SUBREG_REG into memory or register instead
	of whole op1.

	* gcc.c-torture/execute/pr71626-1.c: New test.
	* gcc.c-torture/execute/pr71626-2.c: New test.

From-SVN: r238145