Add crate build test for `thumb*` targets. [IRR-2018-embedded]
## Summary
This PR adds `run-make` test that compiles `cortex-m` crate for all supported `thumb*-none-*` targets using `cargo` and stage2 `rustc`.
- Supported `thumb*-none-*` targets:
- thumbv6m-none-eabi (Bare Cortex-M0, M0+, M1)
- thumbv7em-none-eabi (Bare Cortex-M4, M7)
- thumbv7em-none-eabihf (Bare Cortex-M4F, M7F, FPU, hardfloat)
- thumbv7m-none-eabi (Bare Cortex-M3)
## How to run & Example output
I tested locally and all targets succeeded like below:
```
./x.py clean
./x.py test --target thumbv6m-none-eabi,thumbv7em-none-eabi,thumbv7em-none-eabihf,thumbv7m-none-eabi src/test/run-make
```
```
Check compiletest suite=run-make mode=run-make (x86_64-unknown-linux-gnu -> thumbv6m-none-eabi)
running 5 tests
.....
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
```
## How to re-run
Remove `stamp` file for the test run.
```
rm build/x86_64-unknown-linux-gnu/test/run-make/thumb-none-cortex-m/stamp
```
Then run `test`
```
./x.py test --target thumbv6m-none-eabi,thumbv7em-none-eabi,thumbv7em-none-eabihf,thumbv7m-none-eabi src/test/run-make
(snip)
running 5 tests
iiii.
test result: ok. 1 passed; 0 failed; 4 ignored; 0 measured; 0 filtered out
```
## Artifacts
You can examine the artifacts under the directory below:
```
sekineh@sekineh-VirtualBox:~/rustme10$ ls -l build/x86_64-unknown-linux-gnu/test/run-make/thumb-none-cortex-m/thumb-none-cortex-m/
total 4
drwxrwxr-x 7 sekineh sekineh 4096 8月 14 22:40 cortex-m
```
where `build/x86_64-unknown-linux-gnu/test/run-make/thumb-none-cortex-m/thumb-none-cortex-m/` is came from TMPDIR variable.
## Other notes
For `test.rs` modification, I used the same logic as:
- d8b3c830fb/src/bootstrap/dist.rs (L652-L657)
```
if builder.no_std(target) == Some(true) {
// the `test` doesn't compile for no-std targets
builder.ensure(compile::Std { compiler, target });
} else {
builder.ensure(compile::Test { compiler, target });
}
```
It is a useful snippet when adding `no_std` support to `src/bootstrap` code.
CC @kennytm @jamesmunns @nerdyvaishali
compile-fail-fulldeps/proc-macro/proc-macro-attributes.rs - resolution change for derive helper attributes with the same name as derive itself
run-pass/macro-comma-support.rs - indeterminate resolutions for macros in expression positions
ui/issues/issue-49074.rs - diagnostics regression, not enough recovery to report the second error
ui/object-lifetime/object-lifetime-default.stderr - unstable diagnostics?
Speed up NLL with HybridIdxSetBuf.
It's a sparse-when-small but dense-when-large index set that is very
efficient for sets that (a) have few elements, (b) have large
universe_size values, and (c) are cleared frequently. Which makes it
perfect for the `gen_set` and `kill_set` sets used by the new borrow
checker.
This patch reduces `tuple-stress`'s NLL-check time by 40%, and up to 12%
for several other benchmarks. And it halves the max-rss for `keccak`,
and has smaller wins for `inflate` and `clap-rs`.
rustc_resolve: overhaul `#![feature(uniform_paths)]` error reporting.
Fixes#53408 by only considering external crates to conflict within their (type/module) namespace, *not* with the value or macro namespaces, and also by adding a special-cased error for redundant `use crate_name;` imports (without actually allowing them).
Also, all canaries for a given import are grouped into one diagnostic per namespace, in order to make block-scoped ambiguities clearer.
See changed/added tests for more details.
r? @petrochenkov cc @aturon @joshtriplett
Visit all attributes for feature collection
Previously feature attributes were just collected on item-like "things" as well as exported macros and crate attributes. This ignored some places feature attributes could be specified, such as on enum variants.
Fixes https://github.com/rust-lang/rust/issues/53391.
This shim is generated elsewhere in the compiler so this commit adds support to
ensure it goes through similar paths as the rest of the compiler to set llvm
function attributes like target features.
cc #53372
