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First, the specialisation of option types has been fixed by allowing
the specialisation of constructor return types - this essentially
means that a constructor, such as Some : 'a -> option('a) can get
specialised to int -> option(int), rather than int -> option('a). This
means that these constructors are treated like GADTs internally. Since
this only happens just before the C translation, I haven't put much
effort into making this very robust so far.
Second, there was a bug in C compilation for the typing of return
expressions in non-unit contexts, which has been fixed.
Finally support for vector literals that are non-bitvectors has been
added.
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Fixed an issue whereby an option constructor that was never
constructed, but only matched on, would cause compilation to
fail. Temporarily fixed an issue where union types that can be
entirely stack-allocated were not being treated as such, by simply
heap-allocating all unions. Need to adapt the code generator to handle
this case properly. Fixed a further small issue whereby multiple union
types would confuse the type specialisation pass.
Added a test case for compiling option types.
RISCV now generates C code, but there are still some bugs that need to
be squashed before it compile and work.
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Add a flag to Sail that allows for an image of an elf file to be
dumped in a simple format using linksem, used as
sail -elf test.elf -o test.bin
This image file can then be used by a compiled C version of a sail
spec as with ocaml simply by
./a.out test.bin
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