From 4074f163fc39eedabb09f1ddcbd4c78bf55cb19b Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 11 Mar 2011 15:47:26 +0100
Subject: [PATCH] re PR middle-end/48044 (ICE in
 function_and_variable_visibility, at ipa.c:875)

	PR middle-end/48044
	* ipa.c (cgraph_remove_unreachable_nodes): Enqueue
	all vnode->force_output nodes as needed.

	* gcc.dg/torture/pr48044.c: New test.

From-SVN: r170873
---
 gcc/ChangeLog                          | 6 ++++++
 gcc/ipa.c                              | 4 ++--
 gcc/testsuite/ChangeLog                | 5 +++++
 gcc/testsuite/gcc.dg/torture/pr48044.c | 7 +++++++
 4 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/torture/pr48044.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4eb10249beb1..1da3589cc3fb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-03-11  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/48044
+	* ipa.c (cgraph_remove_unreachable_nodes): Enqueue
+	all vnode->force_output nodes as needed.
+
 2011-03-11  Jason Merrill  <jason@redhat.com>
 
 	PR c++/48069
diff --git a/gcc/ipa.c b/gcc/ipa.c
index 0320ded7a879..49554083c020 100644
--- a/gcc/ipa.c
+++ b/gcc/ipa.c
@@ -1,5 +1,5 @@
 /* Basic IPA optimizations and utilities.
-   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010
+   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -259,7 +259,7 @@ cgraph_remove_unreachable_nodes (bool before_inlining_p, FILE *file)
     {
       vnode->next_needed = NULL;
       vnode->prev_needed = NULL;
-      if (vnode->analyzed
+      if ((vnode->analyzed || vnode->force_output)
 	  && !varpool_can_remove_if_no_refs (vnode))
 	{
 	  vnode->needed = false;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 54d77a6d2535..6169459bcef6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-03-11  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/48044
+	* gcc.dg/torture/pr48044.c: New test.
+
 2011-03-11  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/47768
diff --git a/gcc/testsuite/gcc.dg/torture/pr48044.c b/gcc/testsuite/gcc.dg/torture/pr48044.c
new file mode 100644
index 000000000000..fe3b73402cc3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr48044.c
@@ -0,0 +1,7 @@
+/* PR middle-end/48044 */
+/* { dg-do compile } */
+/* { dg-require-alias "" } */
+
+int a __asm__ ("b") = 0;
+extern int c __asm__ ("a") __attribute__ ((alias ("b")));
+extern int d __attribute__ ((weak, alias ("a")));