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Add support for a zero-sized Unit type. This requires some special at
the codegen level because LLVM (unsurprisingly) only allows Void types
in function return position - to make that a little easier to handle
there's a new pass that strips any unit-only expressions and pulls
unit-only function arguments up to new `let` bindings, so we never have
to actually pass around unit values.
Change-Id: I0fc18a516821f2d69172c42a6a5d246b23471e38
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2695
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
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This makes parsing less ambiguous, which is nice (we can continue to not
actually care about indentation!) and aligns nicely with `fn` for the
declaration itself.
Change-Id: Id48f064e2a1e01c5105297be355d0991b312b76d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2615
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
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Implement extern decls, which codegen to LLVM as forward-declared
functions, and use these as a hook into calling glibc functions.
We can print to the terminal now! The integration tests can test this
now.
Change-Id: I70af4546b417b888ad9fbb18798db240f77f4e71
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2614
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
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Imported from https://github.com/glittershark/achilles/
git-subtree-dir: users/glittershark/achilles
git-subtree-mainline: 4d193f239525954631ba9d789ca3aea9a2f4e14d
git-subtree-split: b93268085aab14c80a400c299da5d04d2781098e
Change-Id: I64a583b454bbe03e20358ad7808939a4cbc212ba
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