diff options
| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-01-11 14:10:54 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-01-11 14:10:54 +0000 |
| commit | 6623b33f7d16cc941701e878e2de0d11b74d20b5 (patch) | |
| tree | 7d96c9b801698d379786ad586c07da8c7dc931f8 /gcc/tree-ssa-loop-ivopts.c | |
| parent | 140b70da5479420fcc50571743d42d72d481c0c4 (diff) | |
| download | gcc-6623b33f7d16cc941701e878e2de0d11b74d20b5.tar.gz | |
* PR tree-optimization/47086
* tree-ssa-loop-ivopts.c (find_givs_in_stmt_scev): Do not record
IVs from statements that might throw.
* PR tree-optimization/47086
* gcc.dg/pr47086.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168659 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 59e2fef5976..479b46fb8dc 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -1,5 +1,5 @@ /* Induction variable optimizations. - Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -1102,6 +1102,12 @@ find_givs_in_stmt_scev (struct ivopts_data *data, gimple stmt, affine_iv *iv) || contains_abnormal_ssa_name_p (iv->step)) return false; + /* If STMT could throw, then do not consider STMT as defining a GIV. + While this will suppress optimizations, we can not safely delete this + GIV and associated statements, even if it appears it is not used. */ + if (stmt_could_throw_p (stmt)) + return false; + return true; } |