[MIR] Add Dominators to MIR and Add Graph Algorithms
~~This PR assumes PR #34149 lands.~~
Add generic graph algorithms to rustc_data_structures.
Add dominators and successors to the ~~cache (that currently only holds predecessors).~~ `Mir`.
Remove the return_address intrinsic.
This intrinsic to get the return pointer was introduced in #16248 / #16081 by @pcwalton for Servo.
However, as explained in #34227, it's impossible to ensure it's used correctly, and it broke with `-Zorbit`.
Servo's usage is being replaced in servo/servo#11872, and I expect nobody else to have abused it.
But I've also started a crater run, just in case this is a `[breaking-change]` for anyone else.
Renames "lets_do_this" macro more appropriately.
The macro gets used to create a mapping of identifiers to names and their
associated functions. Since it creates a table of language items, let's rename
it in a similar manner to how vec! creates a vec.
Don't ignore errors of syscalls in std::sys::unix::fd
If any of these syscalls fail, it indicates a programmer error that
should not be silently ignored.
Use `len` instead of `size_hint` where appropiate
This makes it clearer that we're not just looking for a lower bound but
rather know that the iterator is an `ExactSizeIterator`.
std: Fix up stabilization discrepancies
* Remove the deprecated `CharRange` type which was forgotten to be removed
awhile back.
* Stabilize the `os::$platform::raw::pthread_t` type which was intended to be
stabilized as part of #32804
Convert makefiles to build LLVM/compiler-rt with CMake
This is certainly buggy, but I have successfully built on x86_64-unknown-linux-gnu and x86_64-pc-windows-gnu. I haven't built successfully on mac yet, and I've seen mysterious test failures on Linux, but I'm interested in throwing this at the bots to see what they think.
The macro gets used to create a mapping of identifiers to names and their
associated functions. Since it creates a table of language items, let's rename
it in a similar manner to how vec! creates a vec.
upgrade thread_local! invocation syntax
Allows declaring multiple statics in one macro invocation, and supports attaching attributes to the generated items. In particular, `#![forbid(missing_docs, unused)]` is now tenable on a crate/module containing thread locals.
For an example see [here](https://is.gd/aVFZZF). This change is fully backwards compatible as far as I can tell.
cc @frankmcsherry
* Remove the deprecated `CharRange` type which was forgotten to be removed
awhile back.
* Stabilize the `os::$platform::raw::pthread_t` type which was intended to be
stabilized as part of #32804
Modified E0220 to show error messages for more general cases
This PR extends `E0220`'s description to explain more cases.
Refer to [#34342](https://github.com/rust-lang/rust/pull/34342) for more.
r? @GuillaumeGomez
