Summary:
In the previous diffs, we implement enumerator in order to estimate the cost of for-each loop in ObjC, but when we have FP case when enumerator is used not in for-each loop. For example, the following code has top cost before the fix.
```
void nsarray_enumerator_linear_FP(NSArray* array) {
id obj;
NSInteger sum = 0;
NSEnumerator* enumerator = [array objectEnumerator];
while (obj = [enumerator nextObject]) {
sum += (NSInteger)obj;
}
}
```
Reviewed By: skcho
Differential Revision: D23294895
fbshipit-source-id: 50c7b359f
Summary:
When normalizing discovers new linear arithmetic facts in
`normalize_linear_eqs` we go around once more. Do the same when atoms
become linear equalities.
Reviewed By: skcho
Differential Revision: D23264425
fbshipit-source-id: b355875f3
Summary:
Mostly cosmetic except for a change in [solve_eq] to try harder at
normalization (improves unit tests!). Add more comments and do minor
renamings.
Reviewed By: skcho
Differential Revision: D23243629
fbshipit-source-id: 55bdaf8a8
Summary:
This function had become a bit hard to read and the part about embedded
atoms was not very clear and also a bit incomplete (need to handle "= 1"
and "≠ 1" too).
Reviewed By: skcho
Differential Revision: D23242216
fbshipit-source-id: 239fade97
Summary:
This does a bunch of things at once (sorry):
- Refactor atom/term normalisation so that terms that are really just
atoms become atoms.
- Use this to not bother adding special cases in the functions exported
in the .mli: `and_less_than`, `and_equal_binop`, `prune_binop`, etc.
all had special cases to avoid introducing terms that could be atoms.
That's not great because the same smarts wasn't applied to terms that
would only become atom-like after some normalisation, and led to weird
and duplicated code. Now it's much cleaner: just add the most
straighforward fact and normalise!
- Fix a bug: adding a new equality `x = linear` should *not* be done
using `Normalizer.merge_var_linarith` as this is an internal function
that assumes that `x` is the right representative in `x - linear`.
Instead, for abitrary equations of that form, `solve_eq` should be used.
- When `normalize_linear_eqs` discovers new linear equalities, normalize
again. Add fuel there too to avoid spending too much time doing that.
It could be that we don't need/want fuel there but then we'd need to
think very hard about why there's no infinite recursion possible and
that seems harder.
Reviewed By: skcho
Differential Revision: D23241282
fbshipit-source-id: e5b8c4759
Summary:
This is used for variable substitution and will often be a no-op when
normalising terms over and over again (after the first normalisation,
the expression should stay the same). The equivalent function for terms
was already being careful about not re-allocating identical terms so
extend that care to linear expression.
Reviewed By: skcho
Differential Revision: D23241601
fbshipit-source-id: b365eb87a
Summary:
This allows further normalisation now that terms contain linear
expressions in normal form.
Reviewed By: skcho
Differential Revision: D23241499
fbshipit-source-id: f8e4e759c
Summary:
Linear arithmetic is able to simplify more atoms, eg `x+y <= x+y`
becomes `True` by normalising to "lhs - rhs <= 0". This does the first
step of normalisation, but to get True in this example we also need to
substitute inside atoms according to the linear equalities, which is the
next diff (for now we only substitute variables inside atoms for other
variables or for constants).
Reviewed By: skcho
Differential Revision: D23241457
fbshipit-source-id: 0da0b545c
Summary:
More scaffolding, nothing creates `Linear _` terms yet. Some changes to
variables substitution to allow substituting variables for linear terms
(as well as constants and other variables).
Reviewed By: skcho
Differential Revision: D23241461
fbshipit-source-id: fc870255e
Summary:
This is needed for the rest of the stack that introduces a `Linear of
LinArith.t` variant in `Term.t` to enable more normalisation inside of
terms.
Reviewed By: skcho
Differential Revision: D23241353
fbshipit-source-id: ad765cd13
Summary:
Make term simplification a bit more structured and separate the
"simplification" phase from the "evaluating constant expressions" phase.
Also implement the latter for all possible terms.
Reviewed By: skcho
Differential Revision: D23241334
fbshipit-source-id: 2964aa477
Summary: Not much to see here, extracted to make further changes more readable.
Reviewed By: da319
Differential Revision: D23241335
fbshipit-source-id: 81181f23a
Summary:
`delete` works exactly like `free` so merge both models together. Also
move the `free(0)` test to nullptr.cpp as it seems more appropriate.
Reviewed By: da319
Differential Revision: D23241297
fbshipit-source-id: 20a32ac54
Summary:
Since this is where almost all of the reasoning is concentrated, let's
make sure we use it at every opportunity!
Reviewed By: skcho
Differential Revision: D23194224
fbshipit-source-id: fedb2811e
Summary:
Fix the FP when iterating through constant collection.
facebook
This fix is a hack for now.
Reviewed By: ezgicicek, skcho
Differential Revision: D23241338
fbshipit-source-id: e2e0c05f8
Summary:
As title.
This diff is co-authored by SungKeun Cho and me.
facebook
This diff is co-authored by skcho and me.
Original comments from skcho
"For the record:
1. Rory and I tried to write models for ObjC iterator.
2. We could not use Java's iterator semantics: In Java's, `hasNext` returns the size of collection, rather than a boolean, and which is used as a control variable. On the other hand, in ObjC, it calls only `nextObject`, not calling `hasNext`, and the return value of which is being checked as `null`.
3. We added an artificial field `objc_iterator_offset` to keep the index of the iterator, and the models added in this diff are handling that integer value.
A problem is that `array.objc_iterator_offset` is not included in the control variables, since the condition of the loop is `nextObject() != null` that does not include the iterator offset. We need to make `array.objc_iterator_offset` as a control variable, by changing the part collecting control variables.
"
Reviewed By: ezgicicek, skcho
Differential Revision: D22944278
fbshipit-source-id: 7e71b79c1
Summary:
`Obj.reachable_words` can be very slow on large values, so only call it in debug mode.
Also, measure the time we spend for compressing/storing the global type environment.
Reviewed By: jvillard
Differential Revision: D23264532
fbshipit-source-id: 4a9456ab7
Summary: Use `SqliteUtils.exec` where appropriate, reformat some queries for readability.
Reviewed By: ezgicicek
Differential Revision: D23240945
fbshipit-source-id: 24d921a3a
Summary:
Reset the state before each test so that adding tests doesn't affect
other tests by shifting the ids of their anonymous variables.
Reviewed By: skcho
Differential Revision: D23194171
fbshipit-source-id: 7b717f160
Summary:
Before: 3 modes: (where "lenient" build has warnings not crash the
build, while "strict" build errors on warning):
- opt (default): flambda optimisations + lenient build
- dev (recommand for dev): lenient build, no flambda
- test: strict build (used in tests), no flambda
Now:
- dev (default): *strict* build, no flambda
- opt: lenient build, flambda
- dev-noerror: lenient build, no flambda (use when you want to test
infer but there are build warnings)
The goal is to give faster feedback to infer developers and reduce the
amount of times diffs are sent with build warnings. Also it's now faster
to alternate between changing infer and running unit tests since test
mode is just dev mode.
Reviewed By: ngorogiannis
Differential Revision: D23167416
fbshipit-source-id: d663b6054
Summary: Moving specs to the DB missed out cleaning out all specs when reanalysing. This is the fix.
Reviewed By: jvillard
Differential Revision: D23188958
fbshipit-source-id: 5b50fdda8
Summary:
When install_name_tool fails to patch rpath (and we've seen such cases
in the wild; can happen for many reasons) we better fail the build rather
than ship the binary that will likely fail on start unless a user
happens to have gmp and sqlite dylibs installed.
Reviewed By: skcho
Differential Revision: D23187313
fbshipit-source-id: 83afd0992
Summary:
These are the only ones we need, it turns out the other types (string,
proc names, ...) were dead code. The changes the integer constants to
rational constants, to match the domain of the linear arithmetic engine.
Reviewed By: skcho
Differential Revision: D23164136
fbshipit-source-id: 755c3f526
Summary:
Somehow bash now sees this as `${\#var}`, which is invalid, and fails
rather loudly on my laptop which pollutes the build output. Removing
`\` breaks other platforms.
So, switch to using `wc -m` to count the number of characters.
Reviewed By: ngorogiannis
Differential Revision: D23187505
fbshipit-source-id: a22cc0fe5
Summary: In the frontend captured variables for blocks are added as formal parameters in procdesc at the beginning.
Reviewed By: dulmarod
Differential Revision: D23163619
fbshipit-source-id: 2bcbe9b9c
Summary:
There was a syntax error in the comment as `[code]` is interpreted as
code but backticks were used instead. This made `ocamlformat` produce a
warning but no error.
Reviewed By: skcho
Differential Revision: D23167273
fbshipit-source-id: a7fad10d5
Summary:
Instead of alternating between a normal form and a tree structure,
always keep a normal form. Except the normal form is not always fully
normalized. Overall, it's a bit faster than the previous iteration,
while being more precise! In particular, linear arithmetic aims at being
much more complete.
Reviewed By: skcho
Differential Revision: D23134209
fbshipit-source-id: 5f9ec6ece
Summary:
When implementing iterator, we find out that because some semantics of inferbo is Java-specific, we cannot simply use Java's `Collection` model for `NSCollection`.
So this diff writing `NSCollection` model separately.
This diff also extracts the common parts of `NSCollection` and `Collection` into `AbstractCollection` to combine the duplicate the parts.
Reviewed By: ezgicicek
Differential Revision: D22975159
fbshipit-source-id: daed3f99f
Summary:
We already take into account inheritance if the method inherits a known
modelled initializer method (e.g. Activity.onCreate()).
But if the method is explicitly marked as Initializer, we require its
overrides to be also marked.
This diffs fixes the behavior and makes it consistent, now this is
enough to annotate only parent class.
Reviewed By: jvillard
Differential Revision: D23135177
fbshipit-source-id: a21ff4a0e
Summary:
`Sh.norm` relies on `Eq (v, v)` formulas for `v` a variable to be
normalized to `Tt`, which is how eliminated variables are actually
removed from the representation.
Reviewed By: jvillard
Differential Revision: D22571132
fbshipit-source-id: 6d5f3efd7
Summary:
Move normalization that is necessary for `embed_into_fml` to be left
inverse to `embed_into_cnd` into the general `Fml` constructors.
Reviewed By: jvillard
Differential Revision: D22571137
fbshipit-source-id: 575c6bc45
Summary:
In order to ensure that the normalizing constructors are not
circumvented.
Reviewed By: jvillard
Differential Revision: D22571139
fbshipit-source-id: 32032c6fa
Summary:
The default printer is `pp_classes`, while `pp` is for debugging the
internal representation manipulation, so it is renamed to `pp_raw`.
Reviewed By: jvillard
Differential Revision: D22571135
fbshipit-source-id: 2d624e279
Summary:
`Formula.is_true` and `is_false` are now trivial one-line wrappers,
remove them for clarity.
Reviewed By: jvillard
Differential Revision: D22571143
fbshipit-source-id: 3f058eab4
Summary:
It is more confusing than necessary to use logical formula terminology
for the Context interface, considering that Formula represents
formulas and Context represents a (solver state resulting from a) set
of assumptions.
Reviewed By: jvillard
Differential Revision: D22571136
fbshipit-source-id: 087c97a02
Summary:
The unary forms are primitive in ICS, and in uncoming changes which
involve considering the product of a term and an equality relation, it
is more efficient to have unary constructors since the product is then
linear instead of quadratic in the size of the equality relation.
Reviewed By: jvillard
Differential Revision: D22571138
fbshipit-source-id: e0b745cc8
Qianyi Shu
Daiva Naudziuniene
Jules Villard
Nikos Gorogiannis
Ezgi Çiçek
Sungkeun Cho
Artem Pianykh
Mitya Lyubarskiy
Josh Berdine