The sort and dedupe operations in facet type resolution explicitly work
with `ImplWitnessAccess` instructions as being a reference to an
associated constant on some entity. If only one of the instructions is
an `ImplWitnessAccess`, we still want to consider that one as such, not
get its constant value, which may be some concrete type, and use that
for comparison instead.
This makes the new test fail (which we don't want) in a consistent way
with a similar test of TypeAnd (which we also don't want to fail),
making the system more consistent, while leaving some improvements to be
done.
Avoid inconsistent orderings between instructions, by making the
comparison function into a total order. To do so, we sort
ImplWitnessAccess instructions first, and sort them by their InstId.
Non-ImplWitnessAccess instructions come second, and sort them by their
constant InstId. Thanks to jonmeow for figuring out that the function
was not producing a total order and why.
Since this means the order is no longer relative to source order, we
order the two assignments in the diagnostic by source order(ish) by
putting the lower InstId first in the diagnostic output.
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Uses of `ConstantValueStore::GetConstantInstId` or
`ConstantValueStore::GetInstId` in eval indicate that the code expects a
constant value. Instead of just ending up with `None` in strange places,
diagnose this and convert to an `ErrorInst` when expectations are not
met.
We add `RequireConstantValue` to pair with `GetConstantValue`, and
rename `GetConstantValueIgnoringPeriodSelf` to
`RequireConstantValueIgnoringPeriodSelf` since the former would just be
unused.
Adds a test where a runtime value ends up in the RHS of a rewrite
constraint, where a constant value is expected. This issue was uncovered
by a fuzzer.
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Replace the binary `Operation` interfaces with the `OperationWith(T:!
type)` interfaces described in the design, and add a `Result` associated
type for both unary and binary operations. Update the `impl`s in the
prelude for integer types to use the new form, including supporting
implicit conversion of either operand.
I've tried to split this PR up into commits focused on distinct changes
for review convenience. It may be simplest to review it one commit at a
time.
Given a facet type: `(Z where .X = .Y) where .X =.Y`
The rewrite constraints in the inner facet type are each an
`ImplWitnessAccess` into a witness for the self of type `Z` (which is
the facet type before the `where`). The rewrite constraints in the outer
facet type are each an `ImplWitnessAccess` for the self of type `Z where
.X = .Y`, which is a different self facet type.
This means when deduping in canonicalization, the first `.X` and the
second `.X` are different instructions, and different constant values,
so they both remain in the rewrite constraints, incorrectly. Then if the
outer `.X` is allowed to evaluate to a value from its facet type, it
finds `.Y` resulting in `.Y = .Y` which is also incorrect.
Because of the failure to dedupe the first facet type, that is also
diagnosed as two different assignments to the same `.X`. To resolve
that, we introduce `CompareFacetTypeConstraintValues()` compare values
in facet type constraints, and treat accesses to the same associated
constant in the same facet value as `equivalent` even when through
different witnesses. This allows us to dedupe the two `.X = .Y` rules
into one in the combined facet type.
Given a different facet type: `(Z where .X = ()) where .X = {}`. Here we
want to diagnose that `.X` has been assigned two different values. To do
so, we need to see that the two `.X` values are the same, and we use
`CompareFacetTypeConstraintValues()` to do this comparison. Then we see
two rewrite rules for the same LHS, and we can diagnose that.
We enable evaluating `ImplWitnessAccess` on `.Self` to pull a value from
rewrite constraints in a facet type so that we can see that we are not
incorrect evaluating the LHS of rewrite constraints and producing
cycles. By doing so, also enable generic code to see and use concrete
values in associated constants in facet types.
The `BitAnd` operation combines two `FacetTypeInfo` structures by
concatenating their lists, but did not apply the current specific to the
instructions in the `FacetTypeInfo` as it forgot to go through
`GetContantFacetTypeInfo`.
`WhereExpr` handling duplicates a lot of the logic in
`GetConstantFacetTypeInfo` by calling `GetConstantValue` on things,
instead of calling `GetConstantFacetTypeInfo` on the `FacetTypeInfo` it
constructs. This meant it also needed to call `GetConstantFacetTypeInfo`
on the base facet type, and on any `impls`-requirement facet types
before merging their values together into a single `FacetTypeInfo`.
Instead, make `WhereExpr` more like `BitAnd`, and have it concatenate
things together as-is to construct a `FacetTypeInfo`. Then call
`GetConstantFacetTypeInfo` to canonicalize it and return a constant
value referring to it.
In `GetConstantFacetTypeInfo` we fix a crasher by propagating errors
inserted into the `FacetTypeInfo` out to the `Phase` so that the
resulting instruction depending on the `FacetTypeInfo` is not resolved
to a constant value with errors inside it. A test is added for this,
which was crashing on import of the `FacetType` with an error within
from the imported `impl` decl.
This refactoring gives us three benefits:
* There's now only a single place that does
`ResolveRewriteConstraintsAndCanonicalize`, which is inside
`GetConstantFacetTypeInfo`. This makes the inputs/behaviour of
`ResolveRewriteConstraintsAndCanonicalize` more consistent.
* There's now only a single place that updates the instructions in
`FacetTypeInfo` constraints with new constant values, so that changes
that rely on observing and interacting with that code only need to be
written in a single place. This will avoid duplicating logic in
https://github.com/carbon-language/carbon-lang/pull/5644.
* This will make it easier to move `WhereExpr` handling to a
`EvalConstantInst` function, as it no longer directly depends on
`GetConstantValue()` from `eval.cpp`.
The `SemIR::File` has access to the `Parse::ParseTree` and
`Lex::TokenizedBuffer` now, so `semir/` can dump a friendly source
location for `LocId`. There were a few other Dump functions in `check/`
that added location info to things, and these can be consolidated into
`semir/` as well. Now `check/` dump functions all just forward over to
`SemIR`, `Parse` or `Lex`.
As we've been discussing stack trace behavior, I was thinking having the
version in crashes would be helpful. e.g.:
```
1. Carbon version: 0.0.0-0.dev+bdcef04bb.dirty
```
When finding an executable, this validates that the returned binary is a
symlink back to the same thing as /proc/self/exe, also using that as a
fallback for different things.
Looking back at #3912, we started using `findProgramByName` in order to
avoid path canonicalization done by `GetMainExecutable`. That created
issues as in #5096, wherein an `argv[0]` that's not explicit enough
(`llvm-symbolizer` instead of the full path, done in [LLVM's
Signals.cpp](https://github.com/llvm/llvm-project/blob/4f60f45130c6bd96c79e468fe9927a29af760f56/llvm/lib/Support/Signals.cpp#L198))
leads to incorrect results (finding an `llvm-symbolizer` in `$PATH`).
One option to fix this would be to patch LLVM to provide an absolute
path for `llvm-symbolizer`. However, I'll suggest that passing a
filename in `argv[0]` is not terribly uncommon, and could be a migration
limitation if we force it. The failure mode is also opaque; for example:
```
$ /bin/sh -c "exec -a llvm-symbolizer ./bazel-bin/toolchain/carbon"
error: expected carbon-busybox symlink at `/usr/lib/llvm-19/bin/llvm-symbolizer`
```
Combined with the `setenv` of `LLVM_SYMBOLIZER_PATH` in
`busybox_main.cpp`, this is intended to fix#5096.
This preserves the constant values of the arguments to the thunk, which
is important if the thunk requires conversion of an `IntLiteral` to some
other type. This should become unnecessary once we have form support,
but avoiding the indirection through a thunk function seems valuable
even once that support is in place.
To support this, track whether a function is a thunk on the Function
object, and if so, what the callee of the thunk is. This information is
also included in formatted SemIR when dumping the thunk.
If the RHS of a rewrite constraint refers to an associated constant,
pull the value for that constant from other rewrite constraints. We
repeat this each time a RHS value is changed until we reach a fixed
point, as per the "Rewrite constraint resolution" rule:
https://docs.carbon-lang.dev/docs/design/generics/appendix-rewrite-constraints.html#rewrite-constraint-resolution
While replacing references to associated constants in the RHS, if the
reference is to the LHS of the same rewrite constraint, we diagnose it
as a cycle which has no fixed point, and replace reference to the
associated constant with `ErrorInst`.
Currently it's called `assign_reviewers` as it was copied from the
workflow that does said task. But this workflow is setting labels, so
call it `set_labels`.
All except
`toolchain/check/testdata/interop/cpp/function_param_int*.carbon` and
`toolchain/check/testdata/interop/cpp/function_return.carbon`.
Don't output SemIR for cases that are intended to fail.
Use it to replace most existing modernize-loop-convert lints with
range-based for loops. As requested in review of #5475.
---------
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Instead of using somewhat different approaches for defining in-line
methods at the end of the enclosing scope and defining thunks at the end
of the enclosing scope, we now use the same worklist for both.
This fixes a bug where we would crash when defining thunks if there
happens to be nothing else on the deferred definition worklist, leading
to our leaving the enclosing impl scope before we try to define the
pending thunk. That would only happen if the impl contains no in-line
member function bodies, so only if the impl has only a forward
declaration or a builtin declaration for every method. The latter
case happens (a lot) if we start using thunks in the prelude impls.
One complicating factor here is that this means the deferred definition
worklist moves from the layer containing `check/handle*` and
`check/check_unit.cpp` into the layer containing `check/context.cpp`.
Allowing that required moving a couple of other things that it depends
on -- notably `SuspendedFunction` and `HandleSuspendedFunction` --
around.
Build a `SpecificConstant` (if needed) and `NameRef` instruction when
referencing the thunk target from a thunk. The former is necessary if
the impl is generic in order to call the right version of the thunk
target. This previously caused a crash in lowering.
Also add some more check testing for the interaction of thunks and
generics. This testing uncovered an unrelated bug with thunks for
generic interface functions for which I've added a TODO.
Changes the vectors on `Lower::FileContext` to be `FixedSizeValueStore`
where possible, which we have several at this point.
This changes `FixedSizeValueStore` to prefer inferring the size from a
`ValueStore<IdT>`, which should make adding incorrect sizes harder. Note
I wasn't sure that adding a `size()` to `TypeStore` that returned
`insts().size()` would be good because it doesn't directly work that
way; `ConstantValueStore` would've also required more work since it
doesn't have access to that right now.
We already go to some effort to avoid moving these, but we end up still
moving them twice: once when adding to the worklist and again when
reversing a chunk of the worklist.
* To avoid a move when constructing the worklist, add an `EmplaceResult`
utility that allows the result of a function call to be emplaced into a
container.
* To avoid moves when reversing the list, stop reversing it. Instead of
reversing the list and popping tasks as we run them, we accumulate a
sequence of tasks for a deferred definition region, run them in the
order they were enqueued, then pop them all at the end. This will in
some cases increase the high-water-mark of the size of the worklist, but
not asymptotically. The same high-water-mark could be reached with the
old approach by reordering the declarations in the source file.
In passing, we no longer create `LeaveDeferredDefinitionRegion` tasks
for non-nested regions. We don't need them, because we can detect that
condition by our reaching the end of the worklist. This means that the
enter / leave region actions are now always in correspondence -- we only
create them for *nested* regions. The tasks have been renamed to convey
this.
We still move the suspended function states around if the worklist grows
to over 64 entries and gets reallocated. We could potentially address
that issue too by switching to a chunked allocation strategy as is used
by `ValueStore` and then make the tasks noncopyable, but I'm not
attempting that in this PR.
---------
Co-authored-by: Dana Jansens <danakj@orodu.net>
Bumps the pip group with 1 update in the /github_tools directory:
[requests](https://github.com/psf/requests).
Updates `requests` from 2.32.0 to 2.32.4
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/psf/requests/releases">requests's
releases</a>.</em></p>
<blockquote>
<h2>v2.32.4</h2>
<h2>2.32.4 (2025-06-10)</h2>
<p><strong>Security</strong></p>
<ul>
<li>CVE-2024-47081 Fixed an issue where a maliciously crafted URL and
trusted
environment will retrieve credentials for the wrong hostname/machine
from a
netrc file. (<a
href="https://redirect.github.com/psf/requests/issues/6965">#6965</a>)</li>
</ul>
<p><strong>Improvements</strong></p>
<ul>
<li>Numerous documentation improvements</li>
</ul>
<p><strong>Deprecations</strong></p>
<ul>
<li>Added support for pypy 3.11 for Linux and macOS. (<a
href="https://redirect.github.com/psf/requests/issues/6926">#6926</a>)</li>
<li>Dropped support for pypy 3.9 following its end of support. (<a
href="https://redirect.github.com/psf/requests/issues/6926">#6926</a>)</li>
</ul>
<h2>v2.32.3</h2>
<h2>2.32.3 (2024-05-29)</h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li>Fixed bug breaking the ability to specify custom SSLContexts in
sub-classes of
HTTPAdapter. (<a
href="https://redirect.github.com/psf/requests/issues/6716">#6716</a>)</li>
<li>Fixed issue where Requests started failing to run on Python versions
compiled
without the <code>ssl</code> module. (<a
href="https://redirect.github.com/psf/requests/issues/6724">#6724</a>)</li>
</ul>
<h2>v2.32.2</h2>
<h2>2.32.2 (2024-05-21)</h2>
<p><strong>Deprecations</strong></p>
<ul>
<li>
<p>To provide a more stable migration for custom HTTPAdapters impacted
by the CVE changes in 2.32.0, we've renamed <code>_get_connection</code>
to
a new public API, <code>get_connection_with_tls_context</code>. Existing
custom
HTTPAdapters will need to migrate their code to use this new API.
<code>get_connection</code> is considered deprecated in all versions of
Requests>=2.32.0.</p>
<p>A minimal (2-line) example has been provided in the linked PR to ease
migration, but we strongly urge users to evaluate if their custom
adapter
is subject to the same issue described in CVE-2024-35195. (<a
href="https://redirect.github.com/psf/requests/issues/6710">#6710</a>)</p>
</li>
</ul>
<h2>v2.32.1</h2>
<h2>2.32.1 (2024-05-20)</h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li>Add missing test certs to the sdist distributed on PyPI.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/psf/requests/blob/main/HISTORY.md">requests's
changelog</a>.</em></p>
<blockquote>
<h2>2.32.4 (2025-06-10)</h2>
<p><strong>Security</strong></p>
<ul>
<li>CVE-2024-47081 Fixed an issue where a maliciously crafted URL and
trusted
environment will retrieve credentials for the wrong hostname/machine
from a
netrc file.</li>
</ul>
<p><strong>Improvements</strong></p>
<ul>
<li>Numerous documentation improvements</li>
</ul>
<p><strong>Deprecations</strong></p>
<ul>
<li>Added support for pypy 3.11 for Linux and macOS.</li>
<li>Dropped support for pypy 3.9 following its end of support.</li>
</ul>
<h2>2.32.3 (2024-05-29)</h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li>Fixed bug breaking the ability to specify custom SSLContexts in
sub-classes of
HTTPAdapter. (<a
href="https://redirect.github.com/psf/requests/issues/6716">#6716</a>)</li>
<li>Fixed issue where Requests started failing to run on Python versions
compiled
without the <code>ssl</code> module. (<a
href="https://redirect.github.com/psf/requests/issues/6724">#6724</a>)</li>
</ul>
<h2>2.32.2 (2024-05-21)</h2>
<p><strong>Deprecations</strong></p>
<ul>
<li>
<p>To provide a more stable migration for custom HTTPAdapters impacted
by the CVE changes in 2.32.0, we've renamed <code>_get_connection</code>
to
a new public API, <code>get_connection_with_tls_context</code>. Existing
custom
HTTPAdapters will need to migrate their code to use this new API.
<code>get_connection</code> is considered deprecated in all versions of
Requests>=2.32.0.</p>
<p>A minimal (2-line) example has been provided in the linked PR to ease
migration, but we strongly urge users to evaluate if their custom
adapter
is subject to the same issue described in CVE-2024-35195. (<a
href="https://redirect.github.com/psf/requests/issues/6710">#6710</a>)</p>
</li>
</ul>
<h2>2.32.1 (2024-05-20)</h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li>Add missing test certs to the sdist distributed on PyPI.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/psf/requests/commit/021dc729f0b71a3030cefdbec7fb57a0e80a6cfd"><code>021dc72</code></a>
Polish up release tooling for last manual release</li>
<li><a
href="https://github.com/psf/requests/commit/821770e822a20a21b207b3907ea83878bda1d396"><code>821770e</code></a>
Bump version and add release notes for v2.32.4</li>
<li><a
href="https://github.com/psf/requests/commit/59f8aa2adf1d3d06bcbf7ce6b13743a1639a5401"><code>59f8aa2</code></a>
Add netrc file search information to authentication documentation (<a
href="https://redirect.github.com/psf/requests/issues/6876">#6876</a>)</li>
<li><a
href="https://github.com/psf/requests/commit/5b4b64c3467fd7a3c03f91ee641aaa348b6bed3b"><code>5b4b64c</code></a>
Add more tests to prevent regression of CVE 2024 47081</li>
<li><a
href="https://github.com/psf/requests/commit/7bc45877a86192af77645e156eb3744f95b47dae"><code>7bc4587</code></a>
Add new test to check netrc auth leak (<a
href="https://redirect.github.com/psf/requests/issues/6962">#6962</a>)</li>
<li><a
href="https://github.com/psf/requests/commit/96ba401c1296ab1dda74a2365ef36d88f7d144ef"><code>96ba401</code></a>
Only use hostname to do netrc lookup instead of netloc</li>
<li><a
href="https://github.com/psf/requests/commit/7341690e842a23cf18ded0abd9229765fa88c4e2"><code>7341690</code></a>
Merge pull request <a
href="https://redirect.github.com/psf/requests/issues/6951">#6951</a>
from tswast/patch-1</li>
<li><a
href="https://github.com/psf/requests/commit/6716d7c9f29df636643fa2489f98890216525cb0"><code>6716d7c</code></a>
remove links</li>
<li><a
href="https://github.com/psf/requests/commit/a7e1c745dc23c18e836febd672416ed0c5d8d8ae"><code>a7e1c74</code></a>
Update docs/conf.py</li>
<li><a
href="https://github.com/psf/requests/commit/c799b8167a13416833ad3b4f3298261a477e826f"><code>c799b81</code></a>
docs: fix dead links to kenreitz.org</li>
<li>Additional commits viewable in <a
href="https://github.com/psf/requests/compare/v2.32.0...v2.32.4">compare
view</a></li>
</ul>
</details>
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I believe we will need to eventually add the specific C++ import
information in `LocId`.
This also seems to fix the `LanguageServerDiagnosticInWrongFile` issue
(#5604).
We're still not in the state we want to be according to
https://github.com/carbon-language/carbon-lang/pull/5246#issuecomment-2784301206.
Will look into removing the location part from the `"In file included
from ..."` line.
Part of #5245.
Split out `TokenInfo` to be able to easily write `using ValueType =
TokenInfo;` on `TokenIndex`. Also fixes a small type issue on
`ValueStore` that affected `mapped_iterator` behavior when writing
`old_tokens_it->first < next_offset`.
Add a facet type rewrite constraint resolution step that is run every
time a facet type is constructed, in line with the design here:
https://docs.carbon-lang.dev/docs/design/generics/appendix-rewrite-constraints.html#rewrite-constraint-resolution
The resolution has multiple steps, and this PR implements the first of
them, finding and diagnosing any duplicate rewrites to the same
associated constant.
We already diagnosed this for impl construction, now we do so for all
facet types, which includes the one used for impl construction, so this
diagnostic is a superset of the previous.
When tests crash by stack overflow (and maybe other ways), they don't
print a stack trace so you don't have any way to know which file it was.
By running with --threads=1 you can figure this out, if we print out the
name of each test before we run it.
This prints each test name on its own line, then allows the autoupdate
sigil to be added to the end of that line:
```
TEST: toolchain/check/testdata/alias/basics.carbon .
TEST: toolchain/check/testdata/alias/builtins.carbon !
TEST: toolchain/check/testdata/alias/export_name.carbon .
TEST: toolchain/check/testdata/alias/import.carbon .
...
```
Moves LineInfo and CommentData out so that they can easily be set as
`ValueType` on the Index types. I've also been thinking about letting
`ValueStore` take `ValueType` as a parameter instead of requiring it to
be inferred this way, but for these it feels more consistent with the
rest of the toolchain to do it this way.
I'm not doing similar with `TokenInfo` just because the recovery token
splicing makes it more difficult to use `ValueStore`.
Trying to build a type around the common idiom we have for types based
on an Id range. The primary advantage of this is it makes clear the `Id`
association, and drops the `.index` use.
Lowering was motivating me because it has a few of these, and check
probably has more (e.g. `tree_and_subtrees_getters`), but I'm just
changing a handful of examples to show the concept and see if there's
agreement.
I wanted to inherit from ValueStoreTypes, but name lookup didn't seem to
find the types without `using` statements, at which point there didn't
seem to be much reason to use inheritance.
To make it easier to identify crashing files when testing multiple.
```
(elided)
3. Check::Context
filename: duplicate_name_same_line.carbon
NodeStack:
(elided)
```
Now that included files can specify `EXTRA-ARGS`, this uses that to
handle min_prelude files. Also moves `As`/`ImplicitAs` out to a shared
file, partly because we duplicate it a few times over, partly just to
show that it works.
Also removes the `min_prelude/` subdirectories because many of these
files were touched by autoupdate regardless. I noticed one conflict for
`impl_thunk.carbon`, so renaming that one to
`impl_thunk_min_prelude.carbon`.
`GetArgReplacements` I simply noticed was unused, so removing it.
I've been mulling the name of this, changing it and updating comments to
try and better reflect the current semantic. "Imports" reflects how
we're currently printing this in SemIR.
This mirrors how imports work in general, that the imported declarations
shouldn't belong to the first referencing scope (particularly apparent
when referenced across multiple scopes). I think this was just an
oversight here.
This builds a mechanism for the toolchain to construct more complex
min_prelude files, which in turn should allow the toolchain to stop
special-casing the min_prelude directory. For example, instead of:
```
args.insert(args.end(), {"--custom-core",
"--exclude-dump-file-prefix=include_files/"});
```
This should allow (in a `min_prelude` file):
```
// EXTRA-ARGS: --custom-core --exclude-dump-file-prefix=include_files/
```
Then when that min_prelude is included, it'd be used.
But also, this should allow sharing between min_prelude files with use
of `INCLUDE-FILE`, which as we make progressively more complex
min_preludes might become useful.
The former signature unintentionally allowed any parameter and result
types, because it only checked that the type of the type was `type`,
which is tautological (for non-error values). Also add missing tests for
the builtin.
When deduce determines the type of its parameters, it converts each
argument to the correct type, generating an error if the argument can't
convert. It is at this point that enclosing specifics are applied to
arguments as well, as the enclosing specifics are stored in
`substitutions_`. However we were only doing this step for concrete
argument values. If the argument is a symbolic value, like a facet value
that has an enclosing specific, we failed to apply that enclosing
specific. Then the unconverted argument (without the enclosing specific
applied) would end up failing to convert to the parameter type even
though deduce found that it should.
People seemed receptive [on
#toolchain](https://discord.com/channels/655572317891461132/655578254970716160/1379196447827689553),
so proceeding.
For the two name conflicts, I've set it up so that there's a
"foo.carbon" and "foo_with_prelude.carbon", to indicate that the
no-prelude approach is preferred (with a shorter name).
Note min_prelude will require a little more work/thought, I want to
avoid adding `--custom-core` etc.
Found this is very useful for debugging since otherwise it's hard to
tell what happened in the process.
Based on similar logic in `scripts/target_determinator.py`.
Also fix substitution into constants to provide a source location. This
matters if the result of substitution ends up being part of a generic
eval block.
---------
Co-authored-by: Dana Jansens <danakj@orodu.net>
Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Dana JansensandJon Ross-Perkins
Richard Smith
Geoff Romer
Ivana Ivanovska
dependabot[bot]
Boaz Brickner
josh11bandJosh L