The librustc_llvm API remains mostly unchanged, except that llvm::Attribute is no longer a bitflag but represents only a *single* attribute.
The ability to store many attributes in a small number of bits and modify them without interacting with LLVM is only used in rustc_trans::abi and closely related modules, and only attributes for function arguments are considered there.
Thus rustc_trans::abi now has its own bit-packed representation of argument attributes, which are translated to rustc_llvm::Attribute when applying the attributes.
Before, when we created an AssociatedItem for impl item X, we would read
the impl item itself. Now we instead load up the impl I that contains X
and read the data from the `ImplItemRef` for X; actually, we do it for
all impl items in I pre-emptively.
This kills the last source of edges between a method X and a call to a
method Y defined in the same impl.
Fixes#37121
add test for #37765
Adds a test for #37765, a path parsing fix which removes the need for a parenthesis workaround.
Closes#37765.
cc #37290 @withoutboats
r? @petrochenkov
Add semicolon to "perhaps add a `use` for one of them" help
Similar to pull request #37430, this makes the message more copy-paste
friendly and aligns it with other messages like:
help: you can import it into scope: use foo::Bar;
r? @eddyb
coherence: skip impls with an erroneous trait ref
Impls with a erroneous trait ref are already ignored in the first part
of coherence, so ignore them in the second part too. This avoids
cascading coherence errors when 1 impl of a trait has an error.
r? @nikomatsakis
Peekable must remember if a None has been seen in the `.peek()` method.
It ensures that `.peek(); .peek();` or `.peek(); .next();` only advances the
underlying iterator at most once. This does not by itself make the iterator
fused.
Support `use`ing externally defined macros behind `#![feature(use_extern_macros)]`
With `#![feature(use_extern_macros)]`,
- A name collision between macros from different upstream crates is much less of an issue since we can `use` the macros in different submodules or rename with `as`.
- We can reexport macros with `pub use`, so `#![feature(macro_reexport)]` is no longer needed.
- These reexports are allowed in any module, so crates can expose a macro-modular interface.
If a macro invocation can resolve to both a `use` import and a `macro_rules!` or `#[macro_use]`, it is an ambiguity error.
r? @nrc
Refactoring towards region obligation
Two refactorings towards the intermediate goal of propagating region obligations through the `InferOk` structure (which in turn leads to the possibility of lazy normalization).
1. Remove `TypeOrigin` and add `ObligationCause`
- as we converge subtyping and obligations and so forth, the ability to keep these types distinct gets harder
2. Propagate obligations from `InferOk` into the surrounding fulfillment context
After these land, I have a separate branch (which still needs a bit of work) that can make the actual change to stop directly adding subregion edges and instead propagate obligations. (This should also make it easier to fix the unsoundness in specialization around lifetimes.)
r? @eddyb
The makefiles and `mklldeps.py` called `llvm-config --shared-mode` to
find out if LLVM defaulted to shared or static libraries, and just went
with that. But under rustbuild, `librustc_llvm/build.rs` was assuming
that LLVM should be static, and even forcing `--link-static` for 3.9+.
Now that build script also uses `--shared-mode` to learn the default,
which should work better for pre-3.9 configured for dynamic linking, as
it wasn't possible back then to choose differently via `llvm-config`.
Further, the configure script now has a new `--enable-llvm-link-shared`
option, which allows one to manually override `--link-shared` on 3.9+
instead of forcing static.
Fix grammar verification
* Use make check-lexer to verify the grammar.
* Extend grammar/README
* Add make clean-grammar rule
* Add target check-build-lexer-verifier to make tidy, so it will build the verifier with every build and catch future errors
This is the continuation of #34994
r? @steveklabnik @jonathandturner @alexcrichton
to actually use the AAPCS calling convention
closes#37810
This is technically a [breaking-change] because it changes the ABI of
`extern "aapcs"` functions that (a) involve `f32`/`f64` arguments/return
values and (b) are compiled for arm-eabihf targets from
"aapcs-vfp" (wrong) to "aapcs" (correct).
Appendix:
What these ABIs mean?
- In the "aapcs-vfp" ABI or "hard float" calling convention: Floating
point values are passed/returned through FPU registers (s0, s1, d0, etc.)
- Whereas, in the "aapcs" ABI or "soft float" calling convention:
Floating point values are passed/returned through general purpose
registers (r0, r1, etc.)
Mixing these ABIs can cause problems if the caller assumes that the
routine is using one of these ABIs but it's actually using the other
one.
* Use `make check-lexer` to verify the grammar.
* Extend grammar/README
* Add make clean-grammar rule
* Add target `check-build-lexer-verifier` to `make tidy`, so it will build the verifier with every build and catch future errors
* Search for antlr4 with configure and find
