Function test2

tests/abi_fixed_size.cpp:35–35

fv<1> test1(fv<1> a) { return a; }
fv<2> test2(fv<2> a) { return a; }
fv<4> test4(fv<4> a) { return a; }
fv<8> test8(fv<8> a) { return a; }
fv<Max> testMax(fv<Max> a) { return a; }