stringpool.c: New file.

	* stringpool.c: New file.
	* ggc-common.c (ggc_mark_string_ptr, ggc_add_string_root): Delete.
	(ggc_alloc_string): Now in stringpool.o.
	* ggc-page.c, ggc-simple.c: Do not define or allocate empty_string.
	* ggc.h: Delete prototype of ggc_add_string_root.  #define
	ggc_add_string_root and ggc_mark_string to nothing.  Prototype
	init_stringpool and stringpool_statistics.
	(ggc_alloc_string): Returns a const char *.
	* tree.c (hash_table, do_identifier_warnings): Delete.
	(init_obstacks): Don't initialize the identifier hash table.
	(get_identifier, maybe_get_identifier, start_identifier_warnings,
	set_identifier_size): Now in stringpool.c.
	* tree.h (struct tree_string): Constify pointer field.
	(approx_sqrt): Prototype.

	* Makefile.in (stringpool.o): Add rule, mention in OBJS.

	* toplev.c (approx_sqrt): New function.
	(compile_file): Call stringpool_statistics if mem_report is on.
	(main): Call init_stringpool.

	* builtins.c (c_strlen), c-decl.c (finish_decl), c-lex.c
	(process_directive), c-typeck.c (constructor_asmspec, struct
	initializer_stack, start_init), except.c (create_rethrow_ref),
	stmt.c (digit_strings), toplev.c (decode_f_option), tree.c
	(built_in_filename), varasm,c (in_named_name,
	assemble_static_space, struct constant_descriptor, struct
	deferred_string, struct pool_constant, force_const_mem),
	i386.c (pic_label_name, global_offset_table_name), rs6000.c
	(rs6000_emit_prologue, rs6000_emit_epilogue) : Constify a char *.

	* c-common.c (combine_strings): Combine strings in scratch
	buffer, then pass to build_string.
	* optabs.c (init_libfuncs), profile.c (init_edge_profiler,
	output_func_start_profiler), stmt.c (init_stmt), alpha.c
	(alpha_need_linkage), arm.c (arm_encode_call_attribute),
	i386.c (load_pic_register), ia64.c (ia64_encode_section_info),
	rs6000.c (rs6000_encode_section_info): Create string in
	scratch buffer, then pass to ggc_alloc_string.

	* stmt.c (expand_asm_operands): If we must adjust the
	constraint strings, do so by creating a new one, not by
	modifying the old one in place.  Constify some char *s.
	* config/pa/pa.c (hppa_encode_label): Drop unnecessary second
	argument.  Create string in scratch buffer, then pass to
	ggc_alloc_string.
	* config/pa/pa-protos.h: Update prototype.
	* config/pa/elf.h, config/pa/pa.h, config/pa/som.h:
	hppa_encode_label takes only one argument.

	* c-parse.in (if_prefix): Find the filename and line number at
	$-2 and $-1 respectively.
	* diagnostic.c (error_recursion): Add missing newline, use
	fputs, translate string.

cp:
	* lex.c (struct impl_files, internal_filename): Constify a char *.
java:
	* jcf-parse.c (get_constant), parse.y (do_merge_string_cste):
	Create string in scratch buffer, then pass to build_string.

From-SVN: r37514

1 files changed, 12 insertions, 13 deletions

diff --git a/gcc/ggc.h b/gcc/ggc.h
index 373026ce464..596c49b4989 100644
--- a/gcc/ggc.h
+++ b/gcc/ggc.h
@@ -40,7 +40,7 @@ union  tree_node;
 struct varasm_status;
 
 /* Constants for general use.  */
-extern char *empty_string;
+extern const char empty_string[];
 
 /* Trees that have been marked, but whose children still need marking.  */
 extern varray_type ggc_pending_trees;
@@ -49,12 +49,14 @@ extern varray_type ggc_pending_trees;
 void ggc_add_root PARAMS ((void *base, int nelt, int size, void (*)(void *)));
 void ggc_add_rtx_root PARAMS ((struct rtx_def **, int nelt));
 void ggc_add_tree_root PARAMS ((union tree_node **, int nelt));
-void ggc_add_string_root PARAMS ((char **, int nelt));
 void ggc_add_rtx_varray_root PARAMS ((struct varray_head_tag **, int nelt));
 void ggc_add_tree_varray_root PARAMS ((struct varray_head_tag **, int nelt));
 void ggc_add_tree_hash_table_root PARAMS ((struct hash_table **, int nelt));
 void ggc_del_root PARAMS ((void *base));
 
+/* Temporary */
+#define ggc_add_string_root(ptr, nelt)  /* nothing */
+
 /* Mark nodes from the gc_add_root callback.  These functions follow
    pointers to mark other objects too.  */
 extern void ggc_mark_rtx_varray PARAMS ((struct varray_head_tag *));
@@ -91,12 +93,8 @@ extern void ggc_mark_rtvec_children PARAMS ((struct rtvec_def *));
       ggc_mark_rtvec_children (v__);            \
   } while (0)
 
-#define ggc_mark_string(EXPR)			\
-  do {						\
-    const char *s__ = (EXPR);			\
-    if (s__ != NULL)				\
-      ggc_set_mark (s__);			\
-  } while (0)
+/* Temporary */
+#define ggc_mark_string(EXPR)  /* nothing */
 
 #define ggc_mark(EXPR)				\
   do {						\
@@ -112,6 +110,7 @@ extern void ggc_mark_if_gcable PARAMS ((const void *));
 
 /* Initialize the garbage collector.   */
 extern void init_ggc PARAMS ((void));
+extern void init_stringpool PARAMS ((void));
 
 /* Start a new GGC context.  Memory allocated in previous contexts
    will not be collected while the new context is active.  */
@@ -138,11 +137,10 @@ void *ggc_alloc_cleared PARAMS ((size_t));
 
 #define ggc_alloc_tree(LENGTH) ((union tree_node *) ggc_alloc (LENGTH))
 
-/* Allocate a gc-able string.  If CONTENTS is null, then the memory will
-   be uninitialized.  If LENGTH is -1, then CONTENTS is assumed to be a
-   null-terminated string and the memory sized accordingly.  Otherwise,
-   the memory is filled with LENGTH bytes from CONTENTS.  */
-char *ggc_alloc_string PARAMS ((const char *contents, int length));
+/* Allocate a gc-able string, and fill it with LENGTH bytes from CONTENTS.
+   If LENGTH is -1, then CONTENTS is assumed to be a
+   null-terminated string and the memory sized accordingly.  */
+const char *ggc_alloc_string PARAMS ((const char *contents, int length));
 
 /* Make a copy of S, in GC-able memory.  */
 #define ggc_strdup(S) ggc_alloc_string((S), -1)
@@ -214,3 +212,4 @@ void ggc_print_common_statistics PARAMS ((FILE *, ggc_statistics *));
 
 /* Print allocation statistics.  */
 extern void ggc_print_statistics PARAMS ((void));
+void stringpool_statistics PARAMS ((void));