re PR bootstrap/34003 (gcc trunk unable to bootstrap itself; Unsatisfied symbols: ggc_free)

	PR bootstrap/34003
	* c-decl.c (merge_decls): Copy RTL from olddecl to newdecl.
	* config/pa/pa.c (pa_encode_section_info): If !first, preserve
	SYMBOL_FLAG_REFERENCED flag.

	* gcc.dg/pr34003-1.c: New test.
	* gcc.dg/pr34003-2.c: New.

From-SVN: r130979

gcc/ChangeLog

+2007-12-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/34003
+	* c-decl.c (merge_decls): Copy RTL from olddecl to newdecl.
+	* config/pa/pa.c (pa_encode_section_info): If !first, preserve
+	SYMBOL_FLAG_REFERENCED flag.
+
 2007-12-15  Alexandre Oliva  <aoliva@redhat.com>
 
 	* tree.c (type_hash_add): Fix whitespace.

gcc/c-decl.c

@@ -1670,6 +1670,9 @@ merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype)
 	}
     }
 
+  /* Keep the old rtl since we can safely use it.  */
+  if (HAS_RTL_P (olddecl))
+    COPY_DECL_RTL (olddecl, newdecl);
 
   /* Merge the type qualifiers.  */
   if (TREE_READONLY (newdecl))

gcc/config/pa/pa.c

@@ -7834,6 +7834,12 @@ hppa_encode_label (rtx sym)
 static void
 pa_encode_section_info (tree decl, rtx rtl, int first)
 {
+  int old_referenced = 0;
+
+  if (!first && MEM_P (rtl) && GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF)
+    old_referenced
+      = SYMBOL_REF_FLAGS (XEXP (rtl, 0)) & SYMBOL_FLAG_REFERENCED;
+
   default_encode_section_info (decl, rtl, first);
 
   if (first && TEXT_SPACE_P (decl))
@@ -7842,6 +7848,8 @@ pa_encode_section_info (tree decl, rtx rtl, int first)
       if (TREE_CODE (decl) == FUNCTION_DECL)
 	hppa_encode_label (XEXP (rtl, 0));
     }
+  else if (old_referenced)
+    SYMBOL_REF_FLAGS (XEXP (rtl, 0)) |= old_referenced;
 }
 
 /* This is sort of inverse to pa_encode_section_info.  */

gcc/testsuite/ChangeLog

+2007-12-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/34003
+	* gcc.dg/pr34003-1.c: New test.
+	* gcc.dg/pr34003-2.c: New.
+
 2007-12-15  Hans-Peter Nilsson  <hp@axis.com>
 
 	* gcc.target/cris/peep2-xsrand.c, gcc.target/cris/asmreg-1.c,

gcc/testsuite/gcc.dg/pr34003-1.c

+/* PR bootstrap/34003 */
+/* { dg-do link } */
+/* { dg-options "-O0" } */
+/* { dg-additional-sources "pr34003-2.c" } */
+
+extern void foo (void);
+int bar (void) { foo (); return 1; }
+extern void foo (void);

gcc/testsuite/gcc.dg/pr34003-2.c

+/* PR bootstrap/34003 */
+/* { dg-do compile } */
+/* { dg-options "-O0" } */
+
+extern void abort (void);
+
+int seen = 0;
+
+void foo (void)
+{
+  ++seen;
+}
+
+int main (void)
+{
+  extern int bar (void);
+  if (bar () != 1 || seen != 1)
+    abort ();
+  return 0;
+}