The `doc-book` and `doc-nomicon` steps accidentally depended on a rustbook
compiled by a cross-compiled compiler, which isn't necessary. Be sure to set the
`host` on these dependency edges to the build compiler to ensure that we're
always using a tool compiled for the host platform.
This was discovered trawling the build logs for the new dist bots and
discovering that they're building one too many compilers in stage0.
Properly ban the negation of unsigned integers in type-checking.
Lint-time banning of unsigned negation appears to be vestigial from a time it was feature-gated.
But now it always errors and we do have the ability to deref the checking of e.g. `-0`, through the trait obligation fulfillment context, which will only succeed/error when the `0` gets inferred to a specific type.
The two removed tests are the main reason for finally cleaning this up, they need changing all the time when refactoring the HIR-based `rustc_const_eval` and/or `rustc_passes::consts`, as warnings pile up.
Some i128 tests
* Add some FFI tests for i128 on architectures where we have sort of working "C" FFI support. On all other architectures we ignore the test.
* enhance the u128 overflow tests
Additional cleanup to rustc_trans
Removes `BlockAndBuilder`, `FunctionContext`, and `MaybeSizedValue`.
`LvalueRef` is used instead of `MaybeSizedValue`, which has the added benefit of making functions operating on `Lvalue`s be able to take just that (since it encodes the type with an `LvalueTy`, which can carry discriminant information) instead of a `MaybeSizedValue` and a discriminant.
r? @eddyb
rustbuild: Quickly `dist` cross-host compilers
This commit optimizes the compile time for creating tarballs of cross-host
compilers and as a proof of concept adds two to the standard Travis matrix. Much
of this commit is further refactoring and refining of the `step.rs` definitions
along with the interpretation of `--target` and `--host` flags. This has gotten
confusing enough that I've also added a small test suite to
`src/bootstrap/step.rs` to ensure what we're doing works and doesn't regress.
After this commit when you execute:
./x.py dist --host $MY_HOST --target $MY_HOST
the build system will compile two compilers. The first is for the build platform
and the second is for the host platform. This second compiler is then packaged
up and placed into `build/dist` and is ready to go. With a fully cached LLVM and
docker image I was able to create a cross-host compiler in around 20 minutes
locally.
Eventually we plan to add a whole litany of cross-host entries to the Travis
matrix, but for now we're just adding a few before we eat up all the extra
capacity.
cc #38531
Document custom derive.
These are some bare-bones documentation for custom derive, needed
to stabilize "macros 1.1",
https://github.com/rust-lang/rust/issues/35900
The book chapter is based off of a blog post by @cbreeden,
https://cbreeden.github.io/Macros11/
Normally, we have a policy of not mentioning external crates in
documentation. However, given that syn/quote are basically neccesary
for properly using macros 1.1, I feel that not including them here
would make the documentation very bad. So the rules should be bent
in this instance.
So far, this PR includes only docs; @alexcrichton said in https://github.com/rust-lang/rust/issues/35900 that he'd be okay with landing them before stabilization; I don't mind either way.
These are some bare-bones documentation for custom derive, needed
to stabilize "macros 1.1",
https://github.com/rust-lang/rust/issues/35900
The book chapter is based off of a blog post by @cbreeden,
https://cbreeden.github.io/Macros11/
Normally, we have a policy of not mentioning external crates in
documentation. However, given that syn/quote are basically neccesary
for properly using macros 1.1, I feel that not including them here
would make the documentation very bad. So the rules should be bent
in this instance.
rustc: Stabilize the `proc_macro` feature
This commit stabilizes the `proc_macro` and `proc_macro_lib` features in the
compiler to stabilize the "Macros 1.1" feature of the language. Many more
details can be found on the tracking issue, #35900.
Closes#35900
This commit optimizes the compile time for creating tarballs of cross-host
compilers and as a proof of concept adds two to the standard Travis matrix. Much
of this commit is further refactoring and refining of the `step.rs` definitions
along with the interpretation of `--target` and `--host` flags. This has gotten
confusing enough that I've also added a small test suite to
`src/bootstrap/step.rs` to ensure what we're doing works and doesn't regress.
After this commit when you execute:
./x.py dist --host $MY_HOST --target $MY_HOST
the build system will compile two compilers. The first is for the build platform
and the second is for the host platform. This second compiler is then packaged
up and placed into `build/dist` and is ready to go. With a fully cached LLVM and
docker image I was able to create a cross-host compiler in around 20 minutes
locally.
Eventually we plan to add a whole litany of cross-host entries to the Travis
matrix, but for now we're just adding a few before we eat up all the extra
capacity.
cc #38531
Fix transmute::<T, U> where T requires a bigger alignment than U
For transmute::<T, U> we simply pointercast the destination from a U
pointer to a T pointer, without providing any alignment information,
thus LLVM assumes that the destination is aligned to hold a value of
type T, which is not necessarily true. This can lead to LLVM emitting
machine instructions that assume said alignment, and thus cause aborts.
To fix this, we need to provide the actual alignment to store_operand()
and in turn to store() so they can set the proper alignment information
on the stores and LLVM can emit the proper machine instructions.
Fixes#32947
Don't leak the compiler's internal representation of scopes in error messages.
Fixes#37884 (actually fixes#27942, which was made worse by #37412) by handling more node types.
Ideally we'd turn the unknown node type situations into ICEs and fix them as they show up in errors.
But we might want to backport this patch so I was less aggressive.
Add socket timeout and ttl support in `sys::redox`
This adds support for `read_timeout`, `write_timeout`, and `ttl` on `TcpStream`, `TcpListener`, and `UdpSocket` in the `sys::redox` module.
The DNS lookup has been set to use a 5 second timeout by default.
rustbuild: Fix a few rebuilding issues
Did a bit of investigation and found a few small unrelated issues, but this should help clean up a lot of errors we've been seeing locally.
Use more specific panic message for &str slicing errors
Separate out of bounds errors from character boundary errors, and print
more details for character boundary errors.
It reports the first error it finds in:
1. begin out of bounds
2. end out of bounds
3. begin <= end violated
3. begin not char boundary
5. end not char boundary.
Example:
&"abcαβγ"[..4]
thread 'str::test_slice_fail_boundary_1' panicked at 'byte index 4 is not
a char boundary; it is inside 'α' (bytes 3..5) of `abcαβγ`'
Fixes#38052
Recent versions of Cargo lift less output up into the "main" directory, so let's
look more inside the `deps` folder for changes to propagate differences.
Closes#38744Closes#38746
Despite what the comment says, we actually need to do this. We're not cleaning
out the stage0 compiler's sysroot, but rather just our own sysroot that we
assembled previously.
