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This reduces code sizes and better respects programmer intent when
marking inline(never). Previously such a marking was essentially ignored
for generic functions, as we'd still inline them in remote crates.
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the behavior of the type system not only depends on the current
assumptions, but also the currentnphase of the compiler. This is
mostly necessary as we need to decide whether and how to reveal
opaque types. We track this via the `TypingMode`.
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- removed extra bits from predicates queries that are no longer needed in the new system
- removed the need for `non_erasable_generics` to take in tcx and DefId, removed unused arguments in callers
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closures
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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Co-authored-by: Oli Scherer <github35764891676564198441@oli-obk.de>
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Fixes #126573
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We are gonna need it to uplift EarlyBinder
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Also no longer export noop async_drop_in_place_raw
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Explainer: https://zetanumbers.github.io/book/async-drop-design.html
https://github.com/rust-lang/rust/pull/121801
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We oddly weren't testing the more usual case of casting non-methods to
function pointers. The KCFI shim insertion logic would ICE on these due
to asking for an irrefutable associated item if we cast a function to a
function pointer without needing a traditional shim.
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Adds support for both CFI and KCFI for attaching concrete and abstract
types to functions. KCFI does this through generation of `ReifyShim` on
any function pointer that could go in a vtable, and checking the
`ReifyReason` when emitting the instance. CFI does this by attaching
both the concrete and abstract type to every instance.
TypeID codegen tests are switched to be anchored on the left rather than
the right in order to allow emission of additional type attachments.
Fixes #115953
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KCFI needs to be able to tell which kind of `ReifyShim` it is examining
in order to decide whether to use a concrete type (`FnPtr` case) or an
abstract case (`Vtable` case). You can *almost* tell this from context,
but there is one case where you can't - if a trait has a method which is
*not* `#[track_caller]`, with an impl that *is* `#[track_caller]`, both
the vtable and a function pointer created from that method will be
`ReifyShim(def_id)`.
Currently, the reason is optional to ensure no additional unique
`ReifyShim`s are added without KCFI on. However, the case in which an
extra `ReifyShim` is created is sufficiently rare that this may be worth
revisiting to reduce complexity.
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"Handle" calls to upstream monomorphizations in compiler_builtins
This is pretty cooked, but I think it works.
compiler-builtins has a long-standing problem that at link time, its rlib cannot contain any calls to `core`. And yet, in codegen we _love_ inserting calls to symbols in `core`, generally from various panic entrypoints.
I intend this PR to attack that problem as completely as possible. When we generate a function call, we now check if we are generating a function call from `compiler_builtins` and whether the callee is a function which was not lowered in the current crate, meaning we will have to link to it.
If those conditions are met, actually generating the call is asking for a linker error. So we don't. If the callee diverges, we lower to an abort with the same behavior as `core::intrinsics::abort`. If the callee does not diverge, we produce an error. This means that compiler-builtins can contain panics, but they'll SIGILL instead of panicking. I made non-diverging calls a compile error because I'm guessing that they'd mostly get into compiler-builtins by someone making a mistake while working on the crate, and compile errors are better than linker errors. We could turn such calls into aborts as well if that's preferred.
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Remove `Ord` from `ClosureKind`
Using `Ord` to accomplish a meaning of subset relationship can be hard to read. The existing uses for that are easily replaced with a `match`, and in my opinion, more readable without needing to resorting to comments to explain the intention.
cc `@compiler-errors`
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Using `Ord` to accomplish a meaning of subset relationship
can be hard to read. The existing uses for that are easily
replaced with a `match`, and in my opinion, more readable
without needing to resorting to comments to explain the
intention.
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try_instantiate_mir_and_normalize_erasing_regions was changed in https://github.com/rust-lang/rust/commit/dbc2cc8717dd8c8006595d9e9c91ad472109165a, but not instantiate_mir_and_normalize_erasing_regions
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Dejargonize `subst`
In favor of #110793, replace almost every occurence of `subst` and `substitution` from rustc codes, but they still remains in subtrees under `src/tools/` like clippy and test codes (I'd like to replace them after this)
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