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2010-05-02 Richard Guenther <rguenther@suse.de>
authorrguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Sun, 2 May 2010 18:10:53 +0000 (18:10 +0000)
committerMasaki Muranaka <monaka@monami-software.com>
Sun, 23 May 2010 05:37:45 +0000 (14:37 +0900)
PR tree-optimization/43879
* tree-tailcall.c (find_tail_calls): Clobbers also prevent
tail calls.

* gcc.dg/torture/pr43879-3.c: New testcase.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158977 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ChangeLog
gcc/testsuite/ChangeLog
gcc/tree-tailcall.c

index 4cb8a34..88aa4b0 100644 (file)
@@ -1,3 +1,9 @@
+2010-05-02  Richard Guenther  <rguenther@suse.de>
+
+       PR tree-optimization/43879
+       * tree-tailcall.c (find_tail_calls): Clobbers also prevent
+       tail calls.
+
 2010-05-02  Bruno Haible  <bruno@clisp.org>
 
        * doc/extend.texi (Function Attributes): Fix a typo.
 2010-05-02  Bruno Haible  <bruno@clisp.org>
 
        * doc/extend.texi (Function Attributes): Fix a typo.
index f798eb7..5c71163 100644 (file)
@@ -1,3 +1,8 @@
+2010-05-02  Richard Guenther  <rguenther@suse.de>
+
+       PR tree-optimization/43879
+       * gcc.dg/torture/pr43879-3.c: New testcase.
+
 2010-05-01  Richard Guenther  <rguenther@suse.de>
 
        PR tree-optimization/43949
 2010-05-01  Richard Guenther  <rguenther@suse.de>
 
        PR tree-optimization/43949
index 85825f9..18de4e6 100644 (file)
@@ -460,7 +460,8 @@ find_tail_calls (basic_block bb, struct tailcall **ret)
     {
       if (TREE_CODE (var) != PARM_DECL
          && auto_var_in_fn_p (var, cfun->decl)
     {
       if (TREE_CODE (var) != PARM_DECL
          && auto_var_in_fn_p (var, cfun->decl)
-         && ref_maybe_used_by_stmt_p (call, var))
+         && (ref_maybe_used_by_stmt_p (call, var)
+             || call_may_clobber_ref_p (call, var)))
        return;
     }
 
        return;
     }