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Change internal terminology so we more clearly distinguish between a list of
definitions 'defs' and functions that take an entire abstract syntax
trees 'ast'.
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For example, in
let datasize = e in ...
the typechecker will generate a kid '_datasize if e has an existential
type (with one kid), and in
let 'datasize = e in ...
the typechecker will bind both 'datasize and '_datasize. If we
substitute one as part of constant propagation, this patch will make
constant propagation also substitute the other.
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- Handle more combinations of patterns and expressions in constant
propagation
- Remove dead code after throw() in monomorphisation
- Use correct val specs and environments when analysing and
pretty-printing function clauses
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sail definitions
Definitions can be made external on a per-backend basis, so we need to
make sure constant folding doesn't inline external functions that have
sail definitions for backends other than the ones we are currently
targetting
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Clean up ott grammar a bit
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Also handle any type variables from assignments and degrade gracefully
during constant propagation when unification is not possible.
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Needed for constructor monomorphisation
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- handle multiple bitvector length variables
- more fine-grained unnecessary cast insertion checks
- add tuple matching support to constant propagation (for the test)
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- updates for type checking changes
- handle a little more pattern matching in constant propagation
- fix bug where false positive warnings were produced
- ensure bitvectors in tuples are always monomorphised (to catch the case
where the bitvectors only appear alone with a constant size)
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Currently only supports pure termination measures for loops with effects.
The user syntax uses separate termination measure declarations, as in the
previous recursive termination measures, which are rewritten into the
loop AST nodes before type checking (because it would be rather difficult
to calculate the correct environment to type check the separate declaration
in).
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- Rename DeIid to Operator. It corresponds to operator <string> in the
syntax. The previous name is from when it was called deinfix in
sail1.
- Removed things that weren't actually common from
pretty_print_common.ml, e.g. printing identifiers is backend
specific. The doc_id function here was only used for a very specific
use case in pretty_print_lem, so I simplified it and renamed it to
doc_sia_id, as it is always used for a SIA.Id whatever that is.
- There is some support for anonymous records in constructors, e.g.
union Foo ('a : Type) = {
MkFoo : { field1 : 'a, field2 : int }
}
somewhat similar to the enum syntax in Rust. I'm not sure when this
was added, but there were a few odd things about it. It was
desugared in the preprocessor, rather than initial_check, and the
desugaring generated incorrect code for polymorphic anonymous
records as above.
I moved the code to initial_check, so the pre-processor now just
deals with pre-processor things and not generating types, and I
fixed the code to work with polymorphic types. This revealed some
issues in the C backend w.r.t. polymorphic structs, which is the
bulk of this commit. I also added some tests for this feature.
- OCaml backend can now generate a valid string_of function for
polymorphic structs, previously this would cause the ocaml to fail
to compile.
- Some cleanup in the Sail ott definition
- Add support for E_var in interpreter previously this would just
cause the interpreter to fail
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See comments on e92ff687.
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These should be preserved for prover backends.
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Propagating constants into mutually recursive calls and removing dead branches
might break mutually recursive cycles.
Also make constant propagation use the existing interpreter-based constant
folding to evaluate function calls with only constant arguments (as opposed to
a mixture of inlining and hard-coded rewrite rules).
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(e.g., for the dual 32/64 bit RISC-V model)
Apply this rewrite in Coq backend.
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This shouldn't change any functionality.
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