[PCH] stubs for simple GC

[Geoffrey Keating <gkeating at apple dot com>]

I don't plan to implement PCH for the simple GC (if someone out there
is using simple GC and really wants it, they can feel free), but this
patch stubs out the appropriate routines so that the compiler still
bootstraps.

Bootstrap & test on powerpc-darwin (with --with-gc=simple) in
progress, will commit when it's done.

-- 
- Geoffrey Keating <geoffk@apple.com>

===File ~/patches/pchbranch-simpleggc.patch=================
2002-11-11  Geoffrey Keating  <geoffk@apple.com>

	* ggc-simple.c (init_ggc_pch): New stub procedure.
	(ggc_pch_count_object): Likewise.
	(ggc_pch_total_size): Likewise.
	(ggc_pch_this_base): Likewise.
	(ggc_pch_alloc_object): Likewise.
	(ggc_pch_prepare_write): Likewise.
	(ggc_pch_write_object): Likewise
	(ggc_pch_finish): Likewise.
	(ggc_pch_read): Likewise.

Index: ggc-simple.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/ggc-simple.c,v
retrieving revision 1.39.8.1
diff -u -p -u -p -r1.39.8.1 ggc-simple.c
--- ggc-simple.c	24 Jun 2002 23:23:08 -0000	1.39.8.1
+++ ggc-simple.c	11 Nov 2002 23:57:14 -0000
@@ -1,5 +1,5 @@
 /* Simple garbage collection for the GNU compiler.
-   Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+   Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -26,6 +26,7 @@
 #include "flags.h"
 #include "varray.h"
 #include "ggc.h"
+#include "toplev.h"
 #include "timevar.h"
 
 /* Debugging flags.  */
@@ -502,16 +503,90 @@ ggc_print_statistics ()
 
   fprintf (stderr, "\n\
 Total internal data (bytes)\t%ld%c\n\
-Number of leaves in tree\t%d\n\
+Number of leaves in tree\t%lu\n\
 Average leaf depth\t\t%.1f\n",
 	   SCALE(G.objects * offsetof (struct ggc_mem, u)),
 	   LABEL(G.objects * offsetof (struct ggc_mem, u)),
-	   nleaf, (double)sumdepth / (double)nleaf);
+	   (unsigned long)nleaf, (double)sumdepth / (double)nleaf);
 
   /* Report overall memory usage.  */
   fprintf (stderr, "\n\
-Total objects allocated\t\t%d\n\
+Total objects allocated\t\t%ld\n\
 Total memory in GC arena\t%ld%c\n",
-	   G.objects,
+	   (unsigned long)G.objects,
 	   SCALE(G.allocated), LABEL(G.allocated));
+}
+
+struct ggc_pch_data *
+init_ggc_pch ()
+{
+  sorry ("Generating PCH files is not supported when using ggc-simple.c");
+  /* It could be supported, but the code is not yet written.  */
+  return NULL;
+}
+
+void 
+ggc_pch_count_object (d, x, size)
+     struct ggc_pch_data *d ATTRIBUTE_UNUSED;
+     void *x ATTRIBUTE_UNUSED;
+     size_t size ATTRIBUTE_UNUSED;
+{
+}
+     
+size_t
+ggc_pch_total_size (d)
+     struct ggc_pch_data *d ATTRIBUTE_UNUSED;
+{
+  return 0;
+}
+
+void
+ggc_pch_this_base (d, base)
+     struct ggc_pch_data *d ATTRIBUTE_UNUSED;
+     void *base ATTRIBUTE_UNUSED;
+{
+}
+
+
+char *
+ggc_pch_alloc_object (d, x, size)
+     struct ggc_pch_data *d ATTRIBUTE_UNUSED;
+     void *x ATTRIBUTE_UNUSED;
+     size_t size ATTRIBUTE_UNUSED;
+{
+  return NULL;
+}
+
+void 
+ggc_pch_prepare_write (d, f)
+     struct ggc_pch_data * d ATTRIBUTE_UNUSED;
+     FILE * f ATTRIBUTE_UNUSED;
+{
+}
+
+void
+ggc_pch_write_object (d, f, x, newx, size)
+     struct ggc_pch_data * d ATTRIBUTE_UNUSED;
+     FILE *f ATTRIBUTE_UNUSED;
+     void *x ATTRIBUTE_UNUSED;
+     void *newx ATTRIBUTE_UNUSED;
+     size_t size ATTRIBUTE_UNUSED;
+{
+}
+
+void
+ggc_pch_finish (d, f)
+     struct ggc_pch_data * d ATTRIBUTE_UNUSED;
+     FILE *f ATTRIBUTE_UNUSED;
+{
+}
+
+void
+ggc_pch_read (f, addr)
+     FILE *f ATTRIBUTE_UNUSED;
+     void *addr ATTRIBUTE_UNUSED;
+{
+  /* This should be impossible, since we won't generate any valid PCH
+     files for this configuration.  */
+  abort ();
 }
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