codegen-llvm: never combine DSOLocal and DllImport
Prevent DllImport from being attached to DSOLocal definitions in the LLVM IR. The combination makes no sense, since definitions local to the compilation unit will never be imported from external objects.
Additionally, LLVM will refuse the IR if it encounters the combination (introduced in [1]):
```
if (GV.hasDLLImportStorageClass())
Assert(!GV.isDSOLocal(),
"GlobalValue with DLLImport Storage is dso_local!", &GV);
```
Right now, codegen-llvm will only apply DllImport to constants and rely on call-stubs for functions. Hence, we simply extend the codegen of constants to skip DllImport for any local definitions.
This was discovered when switching the EFI targets to the static relocation model [2]. With this fixed, we can start another attempt at this.
[1] 509132b368
[2] https://github.com/rust-lang/rust/issues/101656
type alias impl trait: add tests showing that hidden type only outlives lifetimes that occur in bounds
fixes#103642https://github.com/rust-lang/rust/pull/102417 only made sure that hidden types cannot outlive lifetimes other than the ones mentioned on bounds, but didn't allow us to actually infer anything from that.
cc `@aliemjay`
Add a codegen-test that verifies inter-crate linkage with the static
relocation model. We expect all symbols that are part of a rust
compilation to end up in the same DSO, thus we expect `dso_local`
annotations.
Clean up pr 104954
UI test filename typo fix and a simple comment rewording. Thanks.
CC `@vincenzopalazzo` (you spelled your name wrongly in the FIXME)
r? `@estebank`
Rustdoc-Json: Add tests for linking to foreign variants.
I initially taught these would be bugs, but it turn out they work perfectly, and the variant is added to paths.
Most of the work is done by jsondoclint checking all the ID's resolve (although this wont happen for links until #105015, which in turn is blocked on removing foreign traits), but we do check that neither the enum nor the variant is inlined, so it must be resolved correctly through paths.
r? ``@GuillaumeGomez``
rustdoc: remove `fnname` CSS class that's styled exactly like `fn`
It's not obvious why this was ever a separate class name, since even in c4219a4783 when it was first added, it was styled identically to regular `fn` links.
Revert #104269 (to avoid spurious hang/test failure in CI)
Causes hangs/memory overflows in the test suite apparently 😢Reopens#104225Fixes#104957
r? ``@lcnr``
It's not obvious why this was ever a separate class name, since even
in c4219a4783 when it was first added,
it was styled identically to regular `fn` links.
make simple check of prinf function
Fixes https://github.com/rust-lang/rust/issues/92898
With this commit we start to make some simple
check when the name resolution fails, and
we generate some helper messages in case the
name is a C name like in the case of the `printf`
and suggest the correct rust method.
`@rustbot` r? `@pnkfelix`
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Ignore bivariant parameters in test_type_match.
https://github.com/rust-lang/rust/pull/103491 made opaque types bivariant with respect of some of their lifetime parameters. Because of this bivariance, some lifetime variables were not unified to anything during borrowck, and were considered as unequal by borrowck type test.
This PR makes type test ignore the bivariant parameters in test_type_match.
Fixes https://github.com/rust-lang/rust/issues/104815
r? `@oli-obk`
Update VecDeque implementation to use head+len instead of head+tail
(See #99805)
This changes `alloc::collections::VecDeque`'s internal representation from using head and tail indices to using a head index and a length field. It has a few advantages over the current design:
* It allows the buffer to be of length 0, which means the `VecDeque::new` new longer has to allocate and could be changed to a `const fn`
* It allows the `VecDeque` to fill the buffer completely, unlike the old implementation, which always had to leave a free space
* It removes the restriction for the size to be a power of two, allowing it to properly `shrink_to_fit`, unlike the old `VecDeque`
* The above points also combine to allow the `Vec<T> -> VecDeque<T>` conversion to be very cheap and guaranteed O(1). I mention this in the `From<Vec<T>>` impl, but it's not a strong guarantee just yet, as that would likely need some form of API change proposal.
All the tests seem to pass for the new `VecDeque`, with some slight adjustments.
r? `@scottmcm`
Change multiline span ASCII art visual order
Tweak the ASCII art for nested multiline spans so that we minimize line overlaps.
Partially addresses https://github.com/rust-lang/rust/issues/61017.
Remove Crate::primitives field
It is a new approach to #90447. Instead of removing primitives from everywhere (ie from `BadImplStripper`), I just removed them from the `Crate` type, allowing to reduce its size.
cc `@camelid`
r? `@notriddle`
Rollup of 8 pull requests
Successful merges:
- #95836 (Use `rust_out{exe_suffix}` for doctests)
- #104882 (notify lcnr on changes to `ObligationCtxt`)
- #104892 (Explain how to get the discriminant out of a `#[repr(T)] enum` with payload)
- #104917 (Allow non-org members to label `requires-debug-assertions`)
- #104931 (Pretty-print generators with their `generator_kind`)
- #104934 (Remove redundant `all` in cfg)
- #104944 (Support unit tests for jsondoclint)
- #104946 (rustdoc: improve popover focus handling JS)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
rustdoc: improve popover focus handling JS
This commit fixes a few inconsistencies and erratic behavior from the notable traits, settings, and sidebar popups:
* It makes it so that pressing Escape closes the mobile sidebar. This is a bit difficult to do on iPhone, but on other setups like desktop tiling window managers, it's easy and makes sense.
* It makes sure that pressing escape while a notable trait popover is open focuses the popover's toggle button, instead of leaving nothing focused, since that makes more sense with keyboard navigation. Clicking the settings, help, or sidebar buttons, however, will not focus the notable trait popover toggle button.
* It ensures that notable trait and settings popovers are exclusive with the mobile sidebar. Nothing should ever overlap a popover, and there should never be more than one popover open at once.
Pretty-print generators with their `generator_kind`
After removing `GenFuture`, I special-cased async generators to pretty-print as `impl Future<Output = X>` mainly to avoid too much diagnostics changes originally.
This now reverses that change so that async fn/blocks are pretty-printed as `[$async-type@$source-position]` in various diagnostics, and updates the tests that this touches.
Use `rust_out{exe_suffix}` for doctests
This was mentioned as an issue to me by ````@bruxisma.```` There are 3 separate instances where "rust_out" can become part of the name of a Rust executable, so I am mostly just hoping that this fixes the problem, given that the other sites which it can slip in seem to be well-behaved.
Separate lifetime ident from lifetime resolution in HIR
Drive-by: change how suggested generic args are computed.
Fixes https://github.com/rust-lang/rust/issues/103815
I recommend reviewing commit-by-commit.
With this commit we start to make some simple
check when the name resolution fails, and
we generate some helper message in case the
name is a C name like in the case of the `printf`
and suggest the correct rust method.
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Fix Dest Prop
Closes#82678, #79191 .
This was not originally a total re-write of the pass but is has gradually turned into one. Notable changes:
1. Significant improvements to documentation all around. The top of the file has been extended with a more precise argument for soundness. The code should be fairly readable, and I've done my best to add useful comments wherever possible. I would very much like for the bus factor to not be one on this code.
3. Improved handling of conflicts that are not visible in normal dataflow. This was the cause of #79191. Handling this correctly requires us to make decision about the semantics and specifically evaluation order of basically all MIR constructs (see specifically #68364#71117. The way this is implemented is based on my preferred resolution to these questions around the semantics of assignment statements.
4. Some re-architecting to improve performance. More details below.
5. Possible future improvements to this optimization are documented, and the code is written with the needs of those improvements in mind. The hope is that adding support for more precise analyses will not require a full re-write of this opt, but just localized changes.
### Regarding Performance
The previous approach had some performance issues; letting `l` be the number of locals and `s` be the number of statements/terminators, the runtime of the pass was `O(l^2 * s)`, both in theory and in practice. This version is smarter about not calculating unnecessary things and doing more caching. Our runtime is now dominated by one invocation of `MaybeLiveLocals` for each "round," and the number of rounds is less than 5 in over 90% of cases. This means it's linear-ish in practice.
r? `@oli-obk` who reviewed the last version of this, but review from anyone else would be more than welcome
This fixes a number of correctness issues from the previous version. Additionally, we use a new
strategy which has much better performance charactersitics and also finds more opportunities to
apply the optimization.
Stop peeling the last iteration of the loop in `Vec::resize_with`
`resize_with` uses the `ExtendWith` code that peels the last iteration:
341d8b8a2c/library/alloc/src/vec/mod.rs (L2525-L2529)
But that's kinda weird for `ExtendFunc` because it does the same thing on the last iteration anyway:
341d8b8a2c/library/alloc/src/vec/mod.rs (L2494-L2502)
So this just has it use the normal `extend`-from-`TrustedLen` code instead.
r? `@ghost`
After removing `GenFuture`, I special-cased async generators to pretty-print as `impl Future<Output = X>` mainly to avoid too much diagnostics changes originally.
This now reverses that change so that async fn/blocks are pretty-printed as `[$movability `async` $something@$source-position]` in various diagnostics, and updates the tests that this touches.
This commit fixes a few inconsistencies and erratic behavior from the
notable traits, settings, and sidebar popups:
* It makes it so that pressing Escape closes the mobile sidebar.
This is a bit difficult to do on iPhone, but on other setups like
desktop tiling window managers, it's easy and makes sense.
* It makes sure that pressing escape while a notable trait popover is
open focuses the popover's toggle button, instead of leaving nothing
focused, since that makes more sense with keyboard navigation. Clicking
the settings, help, or sidebar buttons, however, will not focus the
notable trait popover toggle button.
* It ensures that notable trait and settings popovers are exclusive
with the mobile sidebar. Nothing should ever overlap a popover, and
there should never be more than one popover open at once.
jsondoclint: Handle using enum variants and glob using enums.
More work on jsondoclint for `core.json`
Closes#104942
r? `@GuillaumeGomez`
`@rustbot` modify labels: +A-testsuite
jsondoclint: Accept trait alias is places where trait expected.
More work to make `jsondoclint` work for `core.json`
Closes#104923
r? `@GuillaumeGomez`
`@rustbot` modify labels: +A-testsuite
Do not record unresolved const vars in generator interior
Don't record types in the generator interior when we see unresolved const variables.
We already do this for associated types -- this is important to avoid unresolved inference variables in the generator results during writeback, since the writeback results get stable hashed in incremental mode.
Fixes#104787
Refine `instruction_set` MIR inline rules
Previously an exact match of the `instruction_set` attribute was required for an MIR inline to be considered. This change checks for an exact match *only* if the callee sets an `instruction_set` in the first place. When the callee does not declare an instruction set then it is considered to be platform agnostic code and it's allowed to be inline'd into the caller.
cc ``@oli-obk``
[Edit] Zulip Context: https://rust-lang.zulipchat.com/#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/What.20exactly.20does.20the.20MIR.20optimizer.20do.3F
