* toplev.c (set_float_handler): Make static.
	* toplev.h: Don't prototype set_float_handler.

	* simplify-rtx.c: Don't include setjmp.h.
	(simplify_unary_real, simplify_binary_real, simplify_binary_is2orm1):
	New functions.
	(simplify_unary_operation, simplify_binary_operation): Use them,
	via do_float_handler.

	* fold-const.c: Don't include setjmp.h.
	(exact_real_inverse_1): New function.
	(exact_real_inverse): Use it, via do_float_handler.

	* varasm.c: Don't include setjmp.h.
	(assemble_real_1): New function.
	(assemble_real): Use it, via do_float_handler.
	Call internal_error if we get a trap here.

	* c-parse.in, cse.c, cselib.c, ch/lex.c, config/i386/i386.c,
	config/pj/pj.c, config/s390/s390.c: Don't include setjmp.h.

	* java/lex.h: Don't include setjmp.h.  Don't define
	SET_FLOAT_HANDLER or prototype set_float_handler.

From-SVN: r44815