* 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.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@66133 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 1 deletions

diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi
index 8a97a5d2e0b..e906ccf8358 100644
--- a/gcc/doc/rtl.texi
+++ b/gcc/doc/rtl.texi
@@ -438,7 +438,12 @@ declaration, this is the offset into that logical storage.
 If the @code{symbol_ref} @var{x} was created for a @code{VAR_DECL} or
 a @code{FUNCTION_DECL}, that tree is recorded here.  If this value is
 null, then @var{x} was created by back end code generation routines,
-and so there is no associated front end symbol table entry.
+and there is no associated front end symbol table entry.
+
+@code{SYMBOL_REF_DECL} may also point to a tree of class @code{'c'},
+that is, some sort of constant.  In this case, the @code{symbol_ref}
+is an entry in the per-file constant pool; again, there is no associated
+front end symbol table entry.
 
 @findex SYMBOL_REF_FLAGS
 @item SYMBOL_REF_FLAGS (@var{x})