* cgraph.h (varpool_variable_node): Do not choke on null node.

From-SVN: r206449

5 files changed, 33 insertions, 2 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8bd7ef3..f63918e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2014-01-08  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* cgraph.h (varpool_variable_node): Do not choke on null node.
+
 2014-01-08  Catherine Moore  <clm@codesourcery.com>
 
 	* config/mips/mips.md (simple_return): Attempt to use JRC for microMIPS.
diff --git a/gcc/cgraph.h b/gcc/cgraph.h
index 8b25d94..7ce5401 100644
--- a/gcc/cgraph.h
+++ b/gcc/cgraph.h
@@ -1426,8 +1426,12 @@ varpool_variable_node (varpool_node *node,
 {
   varpool_node *n;
 
-  n = dyn_cast <varpool_node> (symtab_alias_ultimate_target (node,
-							     availability));
+  if (node)
+    n = dyn_cast <varpool_node> (symtab_alias_ultimate_target (node,
+							       availability));
+  else
+    n = NULL;
+
   if (!n && availability)
     *availability = AVAIL_NOT_AVAILABLE;
   return n;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 155f24d..b1f578c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2014-01-08  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/weak2.ad[sb]: New test.
+
 2014-01-08  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/59471
diff --git a/gcc/testsuite/gnat.dg/weak2.adb b/gcc/testsuite/gnat.dg/weak2.adb
new file mode 100644
index 0000000..9e704b5
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/weak2.adb
@@ -0,0 +1,10 @@
+-- { dg-do compile }
+
+package body Weak2 is
+
+   function F return Integer is
+   begin
+      return Var;
+   end;
+
+end Weak2;
diff --git a/gcc/testsuite/gnat.dg/weak2.ads b/gcc/testsuite/gnat.dg/weak2.ads
new file mode 100644
index 0000000..0a0011a
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/weak2.ads
@@ -0,0 +1,9 @@
+package Weak2 is
+
+   Var : Integer;
+   pragma Import (Ada, Var, "var_name");
+   pragma Weak_External (Var);
+
+   function F return Integer;
+
+end Weak2;