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Option -ddump_flow_graphs when used with -c will create graphviz files
for each function in the specification with control and data
dependencies shown.
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Gives warnings when pattern matches are incomplete, when matches are
redundant (in certain cases), or when no unguarded patterns exist. For
example the following file:
enum Test = {A, C, D}
val test1 : Test -> string
function test1 x =
match x {
A => "match A",
B => "this will match anything, because B is unbound!",
C => "match C",
D => "match D"
}
val test2 : Test -> string
function test2 x =
match x {
A => "match A",
C => "match C"
/* No match for D */
}
val test3 : Test -> string
function test3 x =
match x {
A if false => "never match A",
C => "match C",
D => "match D"
}
val test4 : Test -> string
function test4 x =
match x {
A if true => "match A",
C if true => "match C",
D if true => "match D"
}
will produce the following warnings
Warning: Possible redundant pattern match at file "test.sail", line 10, character 5 to line 10, character 5
C => "match C",
Warning: Possible redundant pattern match at file "test.sail", line 11, character 5 to line 11, character 5
D => "match D"
Warning: Possible incomplete pattern match at file "test.sail", line 17, character 3 to line 17, character 7
match x {
Most general matched pattern is A_|C_
Warning: Possible incomplete pattern match at file "test.sail", line 26, character 3 to line 26, character 7
match x {
Most general matched pattern is C_|D_
Warning: No non-guarded patterns at file "test.sail", line 35, character 3 to line 35, character 7
match x {
warnings can be turned of with the -no_warn flag.
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Can now use C-style include declarations to include files within other sail files. This is done in such a way that all the location information is preserved in error messages. As an example:
$include "aarch64/prelude.sail"
$define SYM
$ifndef SYM
$include <../util.sail>
$endif
would include the file aarch64/prelude.sail relative to the file where the include is contained. It then defines a symbol SYM and includes another file if it is not defined. The <../util.sail> include will be accessed relative to $SAIL_DIR/lib, so $SAIL_DIR/lib/../util.sail in this case.
This can be used with the standard C trick of
$ifndef ONCE
$define ONCE
val f : unit -> unit
$endif
so no matter how many sail files include the above file, the valspec for f will only appear once.
Currently we just have $include, $define, $ifdef and $ifndef (with $else and $endif). We're using $ rather than # because # is already used in internal identifiers, although this could be switched.
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Also updated some of the documentation in the sail source code
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This removes all type polymorphism, so we can generate optimized
bitvector code and compile to languages without parametric
polymorphism.
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Experimenting with porting riscv model to new typechecker
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imported new version of PPrint (20171003)
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Requires linenoise library (opam install linenoise) for readline
support. Use 'make isail' to build sail with interactive
support. Plain 'make sail' should work as before with no additional
dependencies.
Use 'sail -i <commands>' to run sail interactively, e.g.
sail -new_parser -i test/ocaml/prelude.sail test/ocaml/trycatch/tc.sail
then try some commands for typechecking and evaluation
sail> :t main
sail> main ()
Doesn't use the lem interpreter right now, instead has a small
operational semantics in src/interpreter.ml, but this is not very
complete and will be changed/removed.
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Now constraints on type constructors are checked correctly when
checking that types are well formed using Env.wf_typ. The arity and
kind of type constructor arguments are also checked in the same way.
Also some general cleanups to the type checker code, with some
auxillary functions being moved to more appropriate files.
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For example,
val test = { ocaml: "test_ocaml" } : unit -> unit
will only be external for OCaml. For other backends, it will have to be
defined.
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- Support tuples in lexps
- Rewrite trivial sizeofs
- Rewrite early returns more aggressively
- Support let bindings with ticked variables (binding both a type-level and
term-level variable at the same time)
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Can now handle nexps such as (2**65 - 1). Uses big_ints for comparisons, and
keeps original nexps in the AST.
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sail.ml
Current REMS install script and Jenkins CI server is on an older ocaml
which doesn't have this function in String.
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Note: the resulting Lem file generated may or may not actually work properly with the interpreter (i.e. it might have too many unknowns); still in the process of debugging some changes there.
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representation of types to support unification; importing support modules from Lem including pp and util
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