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| author | Richard Guenther <rguenther@suse.de> | 2010-05-02 18:10:53 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2010-05-02 18:10:53 +0000 |
| commit | 52c307baffef3b8742fce4ae431359d89ac529b1 (patch) | |
| tree | d3e8d7fdfa7e09e4efa1a960a61d8463e612195b /gcc/tree-tailcall.c | |
| parent | d52e74b25f8a1ac7e79048596961bd3ad9b8f9ef (diff) | |
| download | gcc-52c307baffef3b8742fce4ae431359d89ac529b1.tar.gz | |
re PR tree-optimization/43879 (-fipa-pta causes various miscompilations)
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.
From-SVN: r158977
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; } |