re PR rtl-optimization/71621 (ICE in assign_by_spills, at lra-assigns.c:1417 (error: unable to find a register to spill) w/ -O2 -mavx2 -ftree-vectorize)

2016-07-08  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/71621
	* lra-constraints.c (process_alt_operands): Check combination of
	reg class and mode.

2016-07-08  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/71621
	* gcc.target/i386/pr71621-1.c: New.
	* gcc.target/i386/pr71621-2.c: New.

From-SVN: r238178