* varasm.c (const_str_htab_hash, const_str_htab_eq, STRHASH,
struct deferred_string, const_str_htab): Kill.
(n_deferred_strings): New static variable.
(build_constant_desc): Set SYMBOL_REF_DECL of the new
symbol_ref to point to the constant.
(output_constant_def): When a deferred string is forced out,
just clear STRING_POOL_ADDRESS_P and decrement n_deferred_strings.
(mark_constant): Likewise.
(maybe_output_constant_def_contents): When deferring a string
constant, just set STRING_POOL_ADDRESS_P and increment
n_deferred_strings.
(mark_constant_pool): Check n_deferred_strings, not the size
of const_str_htab.
(init_varasm_once): No need to create const_str_htab.
* rtl.def, rtl.h, doc/rtl.texi: Document possibility that
SYMBOL_REF_DECL points to a constant.
From-SVN: r66133
