xtensa.c (gen_int_relational): Use gcc_assert and gcc_unreachable as appropriate.

xtensa.c (gen_int_relational): Use gcc_assert and gcc_unreachable as appropriate.

	* config/xtensa/xtensa.c (gen_int_relational): Use gcc_assert and
	gcc_unreachable as appropriate.
	(gen_conditional_move, xtensa_split_operand_pair,
	xtensa_split_operand_pair, xtensa_copy_incoming_a7,
	xtensa_copy_incoming_a7, xtensa_copy_incoming_a7,
	xtensa_copy_incoming_a7, xtensa_output_literal,
	xtensa_output_literal, xtensa_output_literal): Likewise.
	* config/xtensa/xtensa.h (INITIAL_ELIMINATION_OFFSET): Likewise.
	* config/xtensa/xtensa.md (*btrue, *bfalse, *ubtrue, *ubfalse,
	*bittrue, *bitfalse, *masktrue, *maskfalse, movsicc_internal0,
	movsicc_internal1, movsfcc_internal0,
	movsfcc_internal1): Likewise.

From-SVN: r98979