From 7109c195f0703e6fa8c44a774cfcaadacf4fe751 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@redhat.com>
Date: Tue, 10 Aug 2004 20:56:58 -0700
Subject: [PATCH] * tree-tailcall.c (suitable_for_tail_opt_p): Also check
 DECL_EXTERNAL.

From-SVN: r85791
---
 gcc/ChangeLog       | 4 ++++
 gcc/tree-tailcall.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1022abd673e..0c7b2e7f934 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2004-08-10  Richard Henderson  <rth@redhat.com>
+
+	* tree-tailcall.c (suitable_for_tail_opt_p): Also check DECL_EXTERNAL.
+
 2004-08-09  Mark Mitchell  <mark@codesourcery.com>
 
 	* config.gcc (arm*-*-eabi*): New target.
diff --git a/gcc/tree-tailcall.c b/gcc/tree-tailcall.c
index 6e1957c597d..401a3991468 100644
--- a/gcc/tree-tailcall.c
+++ b/gcc/tree-tailcall.c
@@ -143,7 +143,7 @@ suitable_for_tail_opt_p (void)
     {
       tree var = VARRAY_TREE (referenced_vars, i);
 
-      if (!TREE_STATIC (var)
+      if (!(TREE_STATIC (var) || DECL_EXTERNAL (var))
 	  && var_ann (var)->mem_tag_kind == NOT_A_TAG
 	  && is_call_clobbered (var))
 	return false;