Implement some of the benchmarks from TSVC_2

[giordano]

https://github.com/UoB-HPC/TSVC_2 is a collection of benchmarks for optimising/vectorising C compilers. It would be good to include some of the more interesting tests as functions to benchmark here.

Reported by @gbaraldi.

[giordano]

@gbaraldi did a port at https://github.com/gbaraldi/JuliaTSVC