diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/range-op.cc | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/range-op.cc b/gcc/range-op.cc index 92b314d..1692a09 100644 --- a/gcc/range-op.cc +++ b/gcc/range-op.cc @@ -4244,6 +4244,30 @@ range_op_bitwise_and_tests () ASSERT_FALSE (res.contains_p (INT (0))); } +static void +range_relational_tests () +{ + int_range<2> lhs (unsigned_char_type_node); + int_range<2> op1 (UCHAR (8), UCHAR (10)); + int_range<2> op2 (UCHAR (20), UCHAR (20)); + + // Never wrapping additions mean LHS > OP1. + tree_code code = op_plus.lhs_op1_relation (lhs, op1, op2); + ASSERT_TRUE (code == GT_EXPR); + + // Most wrapping additions mean nothing... + op1 = int_range<2> (UCHAR (8), UCHAR (10)); + op2 = int_range<2> (UCHAR (0), UCHAR (255)); + code = op_plus.lhs_op1_relation (lhs, op1, op2); + ASSERT_TRUE (code == VREL_NONE); + + // However, always wrapping additions mean LHS < OP1. + op1 = int_range<2> (UCHAR (1), UCHAR (255)); + op2 = int_range<2> (UCHAR (255), UCHAR (255)); + code = op_plus.lhs_op1_relation (lhs, op1, op2); + ASSERT_TRUE (code == LT_EXPR); +} + void range_op_tests () { @@ -4251,6 +4275,7 @@ range_op_tests () range_op_lshift_tests (); range_op_bitwise_and_tests (); range_op_cast_tests (); + range_relational_tests (); } } // namespace selftest |