This test cases are copied from the hana project:
https://sourceforge.net/projects/sim-sim/

** Copy tests from hana: **
while read fn; do cp -v $fn ALL_TESTS/${fn//\//_}; done < <(find test -name '*.v' ! -name '*_gold.v')

** Eliminate test's we can't parse atm: **
rm -f test_synthesizability*.v
rm -f test_parse2synthtrans_latch_1_test.v
rm -f test_parse2synthtrans_always_1_test.v
rm -f test_parse2synthtrans_always_2_test.v
for x in test_*.v; do ../../yosys -b "" $x || rm $x; done