2010-04-23 Richard Guenther <rguenther@suse.de>

	PR tree-optimization/43572
	* tree-tailcall.c (find_tail_calls): Allow PARM_DECL uses.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158671 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 586f1e6b670574dea9382c49f6dc4818fb264b99..c7eecfb50f58fcebc41bd8b34f81533c5c502f78 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-23  Richard Guenther  <rguenther@suse.de>
+
+       PR tree-optimization/43572
+       * tree-tailcall.c (find_tail_calls): Allow PARM_DECL uses.
+
 2010-04-23  Richard Guenther  <rguenther@suse.de>
 
        PR lto/43455

diff --git a/gcc/tree-tailcall.c b/gcc/tree-tailcall.c
index 4d2422aa623777b05d2bb12a954a4e2503d644d4..a9f01919b4d503319f612467c191004436865b96 100644 (file)
--- a/gcc/tree-tailcall.c
+++ b/gcc/tree-tailcall.c
@@ -458,7 +458,8 @@ find_tail_calls (basic_block bb, struct tailcall **ret)
      to local variables.  */
   FOR_EACH_REFERENCED_VAR (var, rvi)
     {
-      if (!is_global_var (var)
+      if (TREE_CODE (var) != PARM_DECL
+         && auto_var_in_fn_p (var, cfun->decl)
          && ref_maybe_used_by_stmt_p (call, var))
        return;
     }