diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-05-02 18:10:53 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-05-02 18:10:53 +0000 |
| commit | 40a612434a7804d56c8c5e577e9c93fbed9778d8 (patch) | |
| tree | d3e8d7fdfa7e09e4efa1a960a61d8463e612195b /gcc/tree-tailcall.c | |
| parent | 14d651f98b3910af1c064a96277dbd5491e18bf5 (diff) | |
| download | gcc-40a612434a7804d56c8c5e577e9c93fbed9778d8.tar.gz | |
2010-05-02 Richard Guenther <rguenther@suse.de>
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
Diffstat (limited to 'gcc/tree-tailcall.c')
| -rw-r--r-- | gcc/tree-tailcall.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-tailcall.c b/gcc/tree-tailcall.c index a9f01919b4d..ec6d2fdff68 100644 --- a/gcc/tree-tailcall.c +++ b/gcc/tree-tailcall.c @@ -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) - && ref_maybe_used_by_stmt_p (call, var)) + && (ref_maybe_used_by_stmt_p (call, var) + || call_may_clobber_ref_p (call, var))) return; } |