[libre-riscv-dev] Instruction sorta-prefixes for easier high-register access

[Hendrik Boom]

On Fri, Jan 18, 2019 at 01:49:39AM -0800, Jacob Lifshay wrote:
> On Fri, Jan 18, 2019, 01:33 Luke Kenneth Casson Leighton <lkcl at lkcl.net
> wrote:
> 
> > hi jacob, a brief thought / reply, more later:
> >
> > * prefixes on instructions gives an opportunity to do key-hole
> > analysis, assessing if the prefixes can be removed and use the CSR
> > stack instead.
> >
> Haven't heard of key-hole analysis before -- wikipedia didn't seem to have
> anything relevant

Would that be what the compiler-writers here call peephole optimisation?

-- hendrik