| Age | Commit message (Collapse) | Author |
|---|
|
concrete but aren't determined by one of the arguments.
|
|
|
|
|
|
length.
|
|
For an enumeration type T, we can create a function T_of_num and num_of_T which convert from the enum to and from a numeric type. The numeric type is range(0, n) where n is the number of constructors in the enum minus one. This makes sure the conversion is type safe, but maybe this is too much of a hassle.
It would be possible to automatically overload all these functions into generic to_enum and from_enum as in Haskell's Enum typeclass, but we don't do this yet.
Currently these functions affect a few lem test cases, but I think that is only because they are tested without any prelude functions and pattern rewrites require a few functions to be defined
What is really broken is if one tries to generate these functions like
enum x = A | B | C
function f A = 0
function f B = 1
function f C = 2
the rewriter really doesn't like function clauses like this, and it seems really hard to fix properly (I tried and gave up), this is a shame as the generation code is much more succinct with definitions like above
|
|
|
|
The internal function _reg_deref is declared as pure, so that bitfield setters
can be implemented as read-modify-write, while only having a wreg effect.
However, for the Lem shallow embedding, the read step of those setters needs to
be embedded into the monad. This could be special-cased in the Lem pretty
printer, but then the pretty printer would have to replicate some logic of the
letbind_effects rewriting step. It seems simplest to add the effect annotation
early in the Lem rewriting pipeline, in the fix_val_specs step. This means
that this rewriting step can only be used for other backends if these
additional effects are acceptable.
|
|
Allow pretty-printing of existential types, if the existentially quantified
variables do not actually appear in the Lem output. This is useful for the bit
list representation of bitvectors, as it will print the type annotation "list
bitU" for bitvectors whose length depends on an existentially quantified
variable.
|
|
|
|
|
|
instruction exception through the exception handler.
|
|
|
|
Makefile which is useful because ocaml generation currently produces some spurious warnings due to running type checker between rewritings.
|
|
|
|
(needed for handling guards after atom-to-itself transformation
in monomorphisation)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Added a regression test in test/ocaml/string_of_struct
|
|
|
|
|
|
|
|
|
|
(Type checker doesn't seem to use false aggressively enough for this)
|
|
|
|
|
|
|
|
|
|
Also refactored the hand written ARM prelude and pulled out some common functionality into files in sail/lib
|
|
|
|
|
|
|
|
|
|
|
|
|
|
to non-bash default shell.
|
|
|
|
|
|
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.
|
|
|
|
|
