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Extend unit test of bits2expr/expr2bits with struct type #6484

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Nov 30, 2021
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Extend unit test of bits2expr/expr2bits with struct type #6484

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24 changes: 24 additions & 0 deletions unit/util/simplify_expr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -108,6 +108,30 @@ TEST_CASE("expr2bits and bits2expr respect bit order", "[core][util]")
const auto should_be_deadbeef2 =
bits2expr(*be, unsignedbv_typet(32), false, ns);
REQUIRE(deadbeef == *should_be_deadbeef2);

c_bit_field_typet four_bits{unsignedbv_typet{8}, 4};
struct_typet st{{{"s", unsignedbv_typet{16}},
{"bf1", four_bits},
{"bf2", four_bits},
{"b", unsignedbv_typet{8}}}};

const auto fill_struct_le = bits2expr(*le, st, true, ns);
REQUIRE(fill_struct_le.has_value());
REQUIRE(
to_struct_expr(*fill_struct_le).operands()[1] ==
from_integer(0xd, four_bits));
REQUIRE(
to_struct_expr(*fill_struct_le).operands()[2] ==
from_integer(0xa, four_bits));

const auto fill_struct_be = bits2expr(*be, st, false, ns);
REQUIRE(fill_struct_be.has_value());
REQUIRE(
to_struct_expr(*fill_struct_be).operands()[1] ==
from_integer(0xb, four_bits));
REQUIRE(
to_struct_expr(*fill_struct_be).operands()[2] ==
from_integer(0xe, four_bits));
}

TEST_CASE("Simplify extractbit", "[core][util]")
Expand Down