gcc/
	* rtl.def (SYMBOL_REF): Remove middle "0" field.
	* rtl.h (block_symbol): Reduce number of fields to 2.
	(rtx_def): Add u2.symbol_ref_flags.
	(SYMBOL_REF_FLAGS): Use it.
	(SYMBOL_REF_DATA, SET_SYMBOL_REF_DECL, SYMBOL_REF_DECL)
	(SET_SYMBOL_REF_CONSTANT, SYMBOL_REF_CONSTANT): Lower index.
	* gengtype.c (adjust_field_rtx_def): Remove SYMBOL_REF_FLAGS handling.
	Lower index of SYMBOL_REF_DATA.
	* print-rtl.c (print_rtx): Lower index for SYMBOL_REF_DATA.
	Print SYMBOL_REF_FLAGS at the same time.
	* genattrtab.c (attr_rtx_1): Only initialize 1 "0" SYMBOL_REF field.

From-SVN: r210363