* Makefile.in (targhooks.o, reload.o): Update dependencies.
	(GTFILES): Add targhooks.c.
	(gt-targhooks.h): New rule; depend on s-gtype.
	* target.h (direct_pool_load_p): New hook.
	* target-def.h (TARGET_DIRECT_POOL_LOAD_P): New macro.
	(TARGET_INITIALIZER): Include it.
	* targhooks.h (default_direct_pool_load_p): Declare.
	(hook_bool_machine_mode_true): Declare.
	* targhooks.c: Include insn-config.h, recog.h, ggc.h and
	gt-targhooks.h.
	(pool_symbol): New variable.
	(default_direct_pool_load_p): New function.
	(hook_bool_machine_mode_true): New function.
	* reload.c: Include target.h.
	(find_reloads): If an alternative will force a constant into memory,
	count an extra reload if constant pool symbols are not valid
	addresses.  If an alternative uses memory to move values between
	registers, count the move as two reloads rather than one.
	* config/s390/s390.c (TARGET_DIRECT_POOL_LOAD_P): Define.
	* doc/tm.texi (TARGET_DIRECT_POOL_LOAD_P): Document.

From-SVN: r73196