PR54814 causes spill fails because reload.c:find_valid_class_1 tests only one
hard register instead of all hard registers of regno:mode in rclass:

http://gcc.gnu.org/PR54814


The patch was originally worked out by Bernd Schmidt and fixed a problem
introduced in

http://gcc.gnu.org/r190252

The patch is bootstrapped and tested on x86_64-linux and also fixes the spill
fails that originally occured on avr-unknown-one.

Ok to apply?


	PR other/54814
	* reload.c (find_valid_class_1): Use in_hard_reg_set_p instead of
	TEST_HARD_REG_BIT.