diff options
Diffstat (limited to 'gcc/tree-outof-ssa.c')
| -rw-r--r-- | gcc/tree-outof-ssa.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/tree-outof-ssa.c b/gcc/tree-outof-ssa.c index cfa1704..430e8ca 100644 --- a/gcc/tree-outof-ssa.c +++ b/gcc/tree-outof-ssa.c @@ -1460,6 +1460,7 @@ check_replaceable (temp_expr_table_p tab, tree stmt) int num_use_ops, version; var_map map = tab->map; ssa_op_iter iter; + tree call_expr; if (TREE_CODE (stmt) != MODIFY_EXPR) return false; @@ -1486,6 +1487,15 @@ check_replaceable (temp_expr_table_p tab, tree stmt) if (flag_float_store && FLOAT_TYPE_P (TREE_TYPE (TREE_OPERAND (stmt, 1)))) return false; + /* Calls to functions with side-effects cannot be replaced. */ + if ((call_expr = get_call_expr_in (stmt)) != NULL_TREE) + { + int call_flags = call_expr_flags (call_expr); + if (TREE_SIDE_EFFECTS (call_expr) + && !(call_flags & (ECF_PURE | ECF_CONST | ECF_NORETURN))) + return false; + } + uses = USE_OPS (ann); num_use_ops = NUM_USES (uses); vuseops = VUSE_OPS (ann); |