re PR target/65167 (ICE: in assign_by_spills, at lra-assigns.c:1383 (unable to find a register to spill) with -O -fschedule-insns -fcheck-pointer-bounds -mmpx)

gcc/

	PR target/65167
	* gcc/config/i386/i386.c (ix86_function_arg_regno_p): Support
	bounds registers.
	(avoid_func_arg_motion): Add dependencies for BNDSTX insns.

gcc/testsuite/

	PR target/65167
	* gcc.target/i386/pr65167.c: New.

From-SVN: r220970