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Get Miri working on ARM - Add a shim for `llvm.arm.hint`, which is required by `core::hint::spin_loop` on `arm` targets. The shim simply calls `yield_active_thread` on a YIELD hint, just like the shim for `llvm.aarch64.isb` that's already present. - Change the signature of `miri_host_to_target_path` to use `c_char` instead of `i8`, to make it compatible with `CStr` on targets where `c_char` is unsigned. The implementation of `miri_host_to_target_path` accesses the memory as bytes and does not need to be adjusted. - Enable ARM targets in CI. Specifically, `aarch64-unknown-linux-gnu` and `arm-unknown-linux-gnueabi` on the Linux host. Since all tests also pass for `aarch64-unknown-linux-gnu` I took the liberty of adding that target to CI as well. Fixes #2791
This directory contains some source code for the Rust project, including:
- The bootstrapping build system
- Various submodules for tools, like cargo, tidy, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.