diff options
Diffstat (limited to 'gcc/tree-ssa.c')
| -rw-r--r-- | gcc/tree-ssa.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c index d0419b70dff..4cb8cc2bc81 100644 --- a/gcc/tree-ssa.c +++ b/gcc/tree-ssa.c @@ -902,6 +902,23 @@ tree_ssa_useless_type_conversion (tree expr) return false; } +/* Returns true if statement STMT may read memory. */ + +bool +stmt_references_memory_p (tree stmt) +{ + stmt_ann_t ann; + + get_stmt_operands (stmt); + ann = stmt_ann (stmt); + + if (ann->has_volatile_ops) + return true; + + return (NUM_VUSES (VUSE_OPS (ann)) > 0 + || NUM_V_MAY_DEFS (V_MAY_DEF_OPS (ann)) > 0 + || NUM_V_MUST_DEFS (V_MUST_DEF_OPS (ann)) > 0); +} /* Internal helper for walk_use_def_chains. VAR, FN and DATA are as described in walk_use_def_chains. |