I solved gcc.attribs.handle_noinline_attribute twice. The first time it printed:
[pre] cost: {[19..20]}, optimality gap: {5.26%}
The second time it printed:
[pre] cost: {[18..20]}, optimality gap: {11.11%}
Settings:
export UNISON_BENCHMARK=toplas
export UNISON_BENCHMARK_LIST=functions
export UNISON_TARGET=Hexagon
export UNISON_GOAL=speed