diff options
| author | Diego Novillo <dnovillo@gcc.gnu.org> | 2005-01-08 13:31:39 -0500 |
|---|---|---|
| committer | Diego Novillo <dnovillo@gcc.gnu.org> | 2005-01-08 13:31:39 -0500 |
| commit | e79b60a72c50b9d1ba1e196048cb6c4329556cba (patch) | |
| tree | 0414cc3da4abf709fe841647da112fa2d898af87 /gcc/tree-ssa-operands.c | |
| parent | 1dba11822e73daaaf1afc31ab17d616d85c217e3 (diff) | |
| download | gcc-e79b60a72c50b9d1ba1e196048cb6c4329556cba.zip gcc-e79b60a72c50b9d1ba1e196048cb6c4329556cba.tar.gz gcc-e79b60a72c50b9d1ba1e196048cb6c4329556cba.tar.bz2 | |
[multiple changes]
2005-01-08 Jeff Law <law@redhat.com>
Diego Novillo <dnovillo@redhat.com>
* tree-nrv.c (tree_nrv): Ignore volatile return values.
* tree-ssa-dse.c (dse_optimize_stmt): Do not optimize
statements with volatile operands.
* tree-ssa-operands.c (add_stmt_operand): Do add volatile
operands after marking a statement with has_volatile_ops.
testsuite/ChangeLog:
2005-01-08 Diego Novillo <dnovillo@redhat.com>
* gcc.dg/pr18241-1.c: New test.
* gcc.dg/pr18241-2.c: New test.
* gcc.dg/pr18241-3.c: New test.
* gcc.dg/pr18241-4.c: New test.
* gcc.dg/pr18241-5.c: New test.
From-SVN: r93088
Diffstat (limited to 'gcc/tree-ssa-operands.c')
| -rw-r--r-- | gcc/tree-ssa-operands.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/gcc/tree-ssa-operands.c b/gcc/tree-ssa-operands.c index fc43a19..2ca208e 100644 --- a/gcc/tree-ssa-operands.c +++ b/gcc/tree-ssa-operands.c @@ -1520,13 +1520,10 @@ add_stmt_operand (tree *var_p, stmt_ann_t s_ann, int flags) sym = (TREE_CODE (var) == SSA_NAME ? SSA_NAME_VAR (var) : var); v_ann = var_ann (sym); - /* Don't expose volatile variables to the optimizers. */ - if (TREE_THIS_VOLATILE (sym)) - { - if (s_ann) - s_ann->has_volatile_ops = true; - return; - } + /* Mark statements with volatile operands. Optimizers should back + off from statements having volatile operands. */ + if (TREE_THIS_VOLATILE (sym) && s_ann) + s_ann->has_volatile_ops = true; if (is_real_op) { |