[tree-ssa] don't consume all memory in pprinter

[Richard Henderson]

Dumping gimple from g++.dg/eh/cleanup1.C generates a 1.3GB file.
We shouldn't need 1.3GB of ram to create this file.

Written by Diego, tested by me.


r~


        * pretty-print.c (pp_write_text_to_stream): Export.
        * pretty-print.h (pp_write_text_to_stream): Declare.
        * tree-pretty-print.c (print_generic_stmt): Flush to file.
        (dump_generic_node): Call pp_write_text_to_stream.
        (maybe_init_pretty_print): Take file argument; associate the
        stream with the buffer.

Index: pretty-print.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/pretty-print.c,v
retrieving revision 2.5.2.1
diff -d -u -p -r2.5.2.1 pretty-print.c
--- pretty-print.c	20 Aug 2003 20:44:26 -0000	2.5.2.1
+++ pretty-print.c	17 Sep 2003 19:25:53 -0000
@@ -91,7 +91,7 @@ pp_clear_state (pretty_printer *pp)
 }
 
 /* Flush the formatted text of PRETTY-PRINTER onto the attached stream.  */
-static inline void
+void
 pp_write_text_to_stream (pretty_printer *pp)
 {
   const char *text = pp_formatted_text (pp);
Index: pretty-print.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/pretty-print.h,v
retrieving revision 1.4.2.4
diff -d -u -p -r1.4.2.4 pretty-print.h
--- pretty-print.h	20 Aug 2003 20:44:26 -0000	1.4.2.4
+++ pretty-print.h	17 Sep 2003 19:25:53 -0000
@@ -255,5 +255,6 @@ extern void pp_base_indent (pretty_print
 extern void pp_base_newline (pretty_printer *);
 extern void pp_base_character (pretty_printer *, int);
 extern void pp_base_string (pretty_printer *, const char *);
+extern void pp_write_text_to_stream (pretty_printer *pp);
 
 #endif /* GCC_PRETTY_PRINT_H */
Index: tree-pretty-print.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/Attic/tree-pretty-print.c,v
retrieving revision 1.1.2.41
diff -d -u -p -r1.1.2.41 tree-pretty-print.c
--- tree-pretty-print.c	10 Sep 2003 13:26:35 -0000	1.1.2.41
+++ tree-pretty-print.c	17 Sep 2003 19:25:53 -0000
@@ -38,7 +38,7 @@ static const char *op_symbol (tree);
 static void pretty_print_string (pretty_printer *, const char*);
 static void print_call_name (pretty_printer *, tree);
 static void newline_and_indent (pretty_printer *, int);
-static void maybe_init_pretty_print (void);
+static void maybe_init_pretty_print (FILE *);
 static void print_declaration (pretty_printer *, tree, int, int);
 static void print_struct_decl (pretty_printer *, tree, int);
 static void dump_block_info (pretty_printer *, basic_block, int);
@@ -105,11 +105,10 @@ debug_generic_stmt (tree t)
 void
 print_generic_stmt (FILE *file, tree t, int flags)
 {
-  maybe_init_pretty_print ();
+  maybe_init_pretty_print (file);
   dumping_stmts = true;
   dump_generic_node (&buffer, t, 0, flags);
-  fprintf (file, "%s", pp_base_formatted_text (&buffer));
-  pp_clear_output_area (&buffer);
+  pp_flush (&buffer);
 }
 
 
@@ -119,11 +118,9 @@ print_generic_stmt (FILE *file, tree t, 
 void
 print_generic_expr (FILE *file, tree t, int flags)
 {
-  maybe_init_pretty_print ();
+  maybe_init_pretty_print (file);
   dumping_stmts = false;
   dump_generic_node (&buffer, t, 0, flags);
-  fprintf (file, "%s", pp_base_formatted_text (&buffer));
-  pp_clear_output_area (&buffer);
 }
 
 
@@ -1368,6 +1365,8 @@ dump_generic_node (pretty_printer *buffe
       NIY;
     }
 
+  pp_write_text_to_stream (buffer);
+
   return spc;
 }
 
@@ -1911,15 +1910,18 @@ pretty_print_string (pretty_printer *buf
 }
 
 static void
-maybe_init_pretty_print (void)
+maybe_init_pretty_print (FILE *file)
 {
   last_bb = NULL;
 
   if (!initialized)
     {
       pp_construct (&buffer, /* prefix */NULL, /* line-width */0);
+      pp_needs_newline (&buffer) = true;
       initialized = 1;
     }
+
+  buffer.buffer->stream = file;
 }
 
 static void