Partially reverts commit 40311c4.

See RUST-141600: this test is broken in two ways:

1. This test triggers `-Wincompatible-pointer-types` on GCC 14.
2. This test requires ARMv8.5+ w/ MTE extensions enabled, but GHA CI
   runner hardware do not have this enabled.

… string

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>

Reverting file name weird-exprs.rs due to its historical use, recognition in community and references

Also make it *only* usable on nightly

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>

Add a test showing `#![feature(default_field_values)]` using `#[const_trait] trait Default` (`#![feature(const_default)]` + `#![feature(const_trait_impl)]`).

…, r=WaffleLapkin

Disable `tests/run-make/mte-ffi` because no CI runners have MTE extensions enabled

This PR disables the `tests/run-make/mte-ffi` run-make test because it is (1) broken, and (2) no CI runners have suitable MTE extensions enabled to run it correctly. This test being broken is tracked by rust-lang#141600.

The first commit also reverts `mte-ffi` changes introduced in rust-lang#141576, as those fixes potentially changes the meaning of the test.

cc ``````@dheaton-arm`````` (as this test was introduced in rust-lang#128384)

### Context

In rust-lang#141576 when converting PR CI runners from x86_64 to aarch64 runners, it was noticed that this test failed on `aarch64-gnu-llvm-19-1` but not `aarch64-gnu`. It turns out that:

- `aarch64-gnu-llvm-19-1`
	- Uses `gcc version 14.2.0 (Ubuntu 14.2.0-4ubuntu2)`
	- Based on `lscpu` output, the hardware that was used for this runner does not have MTE enabled.
- `aarch64-gnu`
	- Uses `gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04)`
	- Based on `lscpu` output, the hardware that was used for this runner does not have MTE enabled.

Based on [this comment](rust-lang#141576 (comment)), it seems like the test *requires* hardware with MTE extensions enabled to run properly (on ARMv8.5 or higher).

Furthermore, I believe this test does indeed have mismatched pointer type issues, i.e.

```
bar_string.c: In function ‘main’:
bar_string.c:36:9: error: assignment to ‘char *’ from incompatible pointer type ‘unsigned int *’ [-Wincompatible-pointer-types]
   36 |     ptr = (unsigned int *)((uintptr_t)ptr | 0x1fl << 56);
      |         ^
```

Which is only exposed by `aarch64-gnu-llvm-19-1` because `aarch64-gnu-llvm-19-1` uses **gcc 14.2.0** whereas `aarch64-gnu` uses **gcc 11.14.0**.

### Details

<details>
<summary>aarch64-gnu-llvm-19-1</summary>

```
gcc_version: Using built-in specs.
COLLECT_GCC=aarch64-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-linux-gnu/14/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: aarch64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 14.2.0-4ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-14/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2,rust --prefix=/usr --with-gcc-major-version-only --program-suffix=-14 --program-prefix=aarch64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/libexec --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-libstdcxx-backtrace --enable-gnu-unique-object --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --enable-fix-cortex-a53-843419 --disable-werror --enable-offload-targets=nvptx-none=/build/gcc-14-T7YiXd/gcc-14-14.2.0/debian/tmp-nvptx/usr --enable-offload-defaulted --without-cuda-driver --enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.2.0 (Ubuntu 14.2.0-4ubuntu2)

lscpu: Architecture:                         aarch64
CPU op-mode(s):                       32-bit, 64-bit
Byte Order:                           Little Endian
CPU(s):                               4
On-line CPU(s) list:                  0-3
Vendor ID:                            ARM
Model name:                           Neoverse-N2
Model:                                0
Thread(s) per core:                   1
Core(s) per socket:                   4
Socket(s):                            1
Stepping:                             r0p0
BogoMIPS:                             2000.00
Flags:                                fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16
L1d cache:                            256 KiB (4 instances)
L1i cache:                            256 KiB (4 instances)
L2 cache:                             4 MiB (4 instances)
L3 cache:                             128 MiB (1 instance)
NUMA node(s):                         1
NUMA node0 CPU(s):                    0-3
Vulnerability Gather data sampling:   Not affected
Vulnerability Itlb multihit:          Not affected
Vulnerability L1tf:                   Not affected
Vulnerability Mds:                    Not affected
Vulnerability Meltdown:               Not affected
Vulnerability Mmio stale data:        Not affected
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed:               Not affected
Vulnerability Spec rstack overflow:   Not affected
Vulnerability Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:             Mitigation; __user pointer sanitization
Vulnerability Spectre v2:             Mitigation; CSV2, BHB
Vulnerability Srbds:                  Not affected
Vulnerability Tsx async abort:        Not affected
```
</details>

<details>
<summary>aarch64-gnu</summary>

```
gcc_version: Using built-in specs.
COLLECT_GCC=aarch64-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/11/lto-wrapper
Target: aarch64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.4.0-1ubuntu1~22.04' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=aarch64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --enable-fix-cortex-a53-843419 --disable-werror --enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04)

lscpu: Architecture:                         aarch64
CPU op-mode(s):                       32-bit, 64-bit
Byte Order:                           Little Endian
CPU(s):                               4
On-line CPU(s) list:                  0-3
Vendor ID:                            ARM
Model:                                0
Thread(s) per core:                   1
Core(s) per socket:                   4
Socket(s):                            1
Stepping:                             r0p0
BogoMIPS:                             2000.00
Flags:                                fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16
L1d cache:                            256 KiB (4 instances)
L1i cache:                            256 KiB (4 instances)
L2 cache:                             4 MiB (4 instances)
L3 cache:                             128 MiB (1 instance)
NUMA node(s):                         1
NUMA node0 CPU(s):                    0-3
Vulnerability Gather data sampling:   Not affected
Vulnerability Itlb multihit:          Not affected
Vulnerability L1tf:                   Not affected
Vulnerability Mds:                    Not affected
Vulnerability Meltdown:               Not affected
Vulnerability Mmio stale data:        Not affected
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed:               Not affected
Vulnerability Spec rstack overflow:   Not affected
Vulnerability Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:             Mitigation; __user pointer sanitization
Vulnerability Spectre v2:             Mitigation; CSV2, BHB
Vulnerability Srbds:                  Not affected
Vulnerability Tsx async abort:        Not affected
```
</details>

### References

- https://www.kernel.org/doc/html/v5.10/arm64/memory-tagging-extension.html

---

cc ``````@marcoieni`````` as this PR reverts the `tests/run-make/mte-ffi` changes from rust-lang#141576.

Store the type of each GVN value

MIR is fully typed, so type information is an integral part of what defines a value. GVN currently tries to circumvent storing types, which creates all sorts of complexities.

This PR stores the type along with the enum `Value` when defining a value index. This allows to simplify a lot of code.

Fixes rust-lang#128094
Fixes rust-lang#135128

r? `````@ghost````` for perf

Remove duplicate error about raw underscore lifetime

Fixes rust-lang#143152

r? `@fee1-dead`

…-value, r=oli-obk

Add test for `default_field_values` and `const_default`

Add a test showing `#![feature(default_field_values)]` using `#[const_trait] trait Default` (`#![feature(const_default)]` + `#![feature(const_trait_impl)]`).

CC rust-lang#132162

…=oli-obk

Make `AsyncDrop` check that it's being implemented on a local ADT

Fixes rust-lang#143691

Emit warning when there is no space between `-o` and arg

Closes rust-lang#142812

`getopt` doesn't seem to have an API to check this, so we have to check the args manually.

r? compiler

…-errors

Ban projecting into SIMD types [MCP838]

Closes rust-lang/compiler-team#838

The actual compiler change here is tiny; there's just a bazillion tests to update.

Since I'm sure I've missed some, for now
r? ghost

…szelmann

Port `#[coverage]` to the new attribute system

r? `````@jdonszelmann`````

`tests/ui`: A New Order [0/28]

> [!NOTE]
>
> Intermediate commits are intended to help review, but will be squashed prior to merge.

These are the some last tests that didn’t make it into the main twenty-eightology of PRs. Part of rust-lang#133895.

r? `@jieyouxu`

docs(alloc::fmt): Make type optional, instead of matching empty string

Think this is clearer.

Noticed as I was implementing [`tree-sitter-rust-format-args`](https://github.com/nik-rev/tree-sitter-rust-format-args), and attempting to match the empty string results in an error.

…ee1-dead

Make slice comparisons const

This needed a fix for `derive_const`, too, as it wasn't usable in libcore anymore as trait impls need const stability attributes. I think we can't use the same system as normal trait impls while `const_trait_impl` is still unstable.

r? `@fee1-dead`

cc rust-lang#143800

…, r=oli-obk

Use $crate in macros for rustc_public (aka stable_mir)

This makes `#[macro_use] extern crate rustc_public` unnecessary (which brings all of `rustc_public`'s macros into scope for the entire crate); instead, now you can simply use `rustc_public::run!()`.