[tree-ssa] Fix PR 14694

[Diego Novillo <dnovillo at redhat dot com>]

Details about the failure and the fix at
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14694.

Richard, could you check it out?  It's in the function unnesting pass
and I want to make sure I'm not papering over the problem.

Bootstrapped and tested x86 and x86-64.


Thanks.  Diego.



	* tree-nested.c (convert_nonlocal_reference): Don't process
	global variables.
	(convert_local_reference): Likewise.

testsuite/ChangeLog.tree-ssa

	* gcc.c-torture/compile/20040323-1.c: New test.

Index: tree-nested.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/Attic/tree-nested.c,v
retrieving revision 1.1.2.4
diff -d -c -p -d -u -p -r1.1.2.4 tree-nested.c
--- tree-nested.c	18 Mar 2004 22:43:56 -0000	1.1.2.4
+++ tree-nested.c	23 Mar 2004 21:15:58 -0000
@@ -55,7 +55,7 @@
 
    The implementation here is much more direct.  Everything that can be
    referenced by an inner function is a member of an explicitly created
-   structure herein called the "nonlocal frame struct".  The incomming
+   structure herein called the "nonlocal frame struct".  The incoming
    static chain for a nested function is a pointer to this struct in 
    the parent.  In this way, we settle on known offsets from a known
    base, and so are decoupled from the logic that places objects in the
@@ -717,7 +717,9 @@ convert_nonlocal_reference (tree *tp, in
     {
     case VAR_DECL:
       /* Non-automatic variables are never processed.  */
-      if (TREE_STATIC (t) || DECL_EXTERNAL (t))
+      if (TREE_STATIC (t)
+	  || DECL_EXTERNAL (t)
+	  || decl_function_context (t) == NULL_TREE)
 	break;
       /* FALLTHRU */
 
@@ -807,7 +809,9 @@ convert_local_reference (tree *tp, int *
     {
     case VAR_DECL:
       /* Non-automatic variables are never processed.  */
-      if (TREE_STATIC (t) || DECL_EXTERNAL (t))
+      if (TREE_STATIC (t)
+	  || DECL_EXTERNAL (t)
+	  || decl_function_context (t) == NULL_TREE)
 	break;
       /* FALLTHRU */
 
Index: testsuite/gcc.c-torture/compile/20040323-1.c
===================================================================
RCS file: testsuite/gcc.c-torture/compile/20040323-1.c
diff -N testsuite/gcc.c-torture/compile/20040323-1.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ testsuite/gcc.c-torture/compile/20040323-1.c	23 Mar 2004 21:16:22 -0000
@@ -0,0 +1,15 @@
+/* Extracted from PR 14694 by Andrew Pinski.  */
+
+extern unsigned int _rtld_local __attribute__ ((visibility ("hidden")));
+
+extern unsigned int _rtld_local
+  __attribute__ ((alias ("_rtld_global"), visibility ("hidden")));
+
+unsigned int
+_dl_start (void *arg)
+{
+  void elf_machine_rel ()
+  {
+    unsigned int value = (_rtld_local);
+  }
+}