tree-flow-inline.h (num_immediate_uses): Don't abort if DF is NULL.

	* tree-flow-inline.h (num_immediate_uses): Don't abort if DF
	is NULL.

From-SVN: r82099

gcc/ChangeLog

+2004-05-21  Diego Novillo  <dnovillo@redhat.com>
+
+	* tree-flow-inline.h (num_immediate_uses): Don't abort if DF
+	is NULL.
+
 2004-05-21  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/sparc/linux64.h (OPTION_DEFAULT_SPECS): If SPARC_BI_ARCH,

gcc/tree-flow-inline.h

@@ -295,6 +295,9 @@ num_immediate_uses (dataflow_t df)
 static inline tree
 immediate_use (dataflow_t df, int num)
 {
+  if (!df)
+    return NULL_TREE;
+
 #ifdef ENABLE_CHECKING
   if (num >= num_immediate_uses (df))
     abort ();