diff options
| author | dnovillo <dnovillo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-01-08 18:31:39 +0000 |
|---|---|---|
| committer | dnovillo <dnovillo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-01-08 18:31:39 +0000 |
| commit | 52c2a30751c74e52a07a2905cd875994db2803a8 (patch) | |
| tree | 0414cc3da4abf709fe841647da112fa2d898af87 /gcc/tree-ssa-operands.c | |
| parent | 5a0046ea4f29a9e700176205b0e5a6ac41417981 (diff) | |
| download | gcc-52c2a30751c74e52a07a2905cd875994db2803a8.tar.gz | |
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@93088 138bc75d-0d04-0410-961f-82ee72b054a4
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 fc43a196e52..2ca208ef8fc 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) { |