…nieu

Fix clobber_abi and disallow SVE-related registers in Arm64EC inline assembly

Currently `clobber_abi` in Arm64EC inline assembly is implemented using `InlineAsmClobberAbi::AArch64NoX18`, but broken since it attempts to clobber registers that cannot be used in Arm64EC: https://godbolt.org/z/r3PTrGz5r

```
error: cannot use register `x13`: x13, x14, x23, x24, x28, v16-v31 cannot be used for Arm64EC
 --> <source>:6:14
  |
6 |     asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags));
  |              ^^^^^^^^^^^^^^^^

error: cannot use register `x14`: x13, x14, x23, x24, x28, v16-v31 cannot be used for Arm64EC
 --> <source>:6:14
  |
6 |     asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags));
  |              ^^^^^^^^^^^^^^^^

<omitted the same errors for v16-v31>
```

Additionally, this disallows SVE-related registers per rust-lang#131332 (comment).

cc `@dpaoliello`

r? `@Amanieu`

`@rustbot` label O-windows O-AArch64 +A-inline-assembly

…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#129424 (Stabilize `Pin::as_deref_mut()`)
 - rust-lang#131332 (Fix clobber_abi and disallow SVE-related registers in Arm64EC inline assembly)
 - rust-lang#131384 (Update precondition tests (especially for zero-size access to null))
 - rust-lang#131430 (Special treatment empty tuple when suggest adding a string literal in format macro.)
 - rust-lang#131550 (Make some tweaks to extern block diagnostics)
 - rust-lang#131667 (Fix AArch64InlineAsmReg::emit)
 - rust-lang#131679 (compiletest: Document various parts of compiletest's `lib.rs`)
 - rust-lang#131682 (Tag PRs affecting compiletest with `A-compiletest`)

Failed merges:

 - rust-lang#131496 (Stabilise `const_make_ascii`.)

r? `@ghost`
`@rustbot` modify labels: rollup

…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#129424 (Stabilize `Pin::as_deref_mut()`)
 - rust-lang#131332 (Fix clobber_abi and disallow SVE-related registers in Arm64EC inline assembly)
 - rust-lang#131384 (Update precondition tests (especially for zero-size access to null))
 - rust-lang#131430 (Special treatment empty tuple when suggest adding a string literal in format macro.)
 - rust-lang#131550 (Make some tweaks to extern block diagnostics)
 - rust-lang#131667 (Fix AArch64InlineAsmReg::emit)
 - rust-lang#131679 (compiletest: Document various parts of compiletest's `lib.rs`)
 - rust-lang#131682 (Tag PRs affecting compiletest with `A-compiletest`)

Failed merges:

 - rust-lang#131496 (Stabilise `const_make_ascii`.)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#131332 - taiki-e:arm64ec-clobber-abi, r=Amanieu

Fix clobber_abi and disallow SVE-related registers in Arm64EC inline assembly

Currently `clobber_abi` in Arm64EC inline assembly is implemented using `InlineAsmClobberAbi::AArch64NoX18`, but broken since it attempts to clobber registers that cannot be used in Arm64EC: https://godbolt.org/z/r3PTrGz5r

```
error: cannot use register `x13`: x13, x14, x23, x24, x28, v16-v31 cannot be used for Arm64EC
 --> <source>:6:14
  |
6 |     asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags));
  |              ^^^^^^^^^^^^^^^^

error: cannot use register `x14`: x13, x14, x23, x24, x28, v16-v31 cannot be used for Arm64EC
 --> <source>:6:14
  |
6 |     asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags));
  |              ^^^^^^^^^^^^^^^^

<omitted the same errors for v16-v31>
```

Additionally, this disallows SVE-related registers per rust-lang#131332 (comment).

cc ``@dpaoliello``

r? ``@Amanieu``

``@rustbot`` label O-windows O-AArch64 +A-inline-assembly

Move remaining inline assembly test files into asm directory

Before:
```
tests/assembly/asm/*
tests/assembly/asm-comments.rs
tests/codegen/asm-target-clobbers.rs
tests/codegen/asm-goto.rs
tests/codegen/asm-maybe-uninit.rs
tests/codegen/asm-msp430-clobbers.rs
tests/codegen/asm-options.rs
tests/codegen/asm-clobbers.rs
tests/codegen/asm-may_unwind.rs
tests/codegen/asm-arm64ec-clobbers.rs
tests/codegen/asm-powerpc-clobbers.rs
tests/codegen/asm-sanitize-llvm.rs
tests/codegen/asm-s390x-clobbers.rs
tests/codegen/asm-clobber_abi.rs
tests/codegen/asm-multiple-options.rs
tests/codegen/global_asm.rs
tests/codegen/global_asm_include.rs
tests/codegen/global_asm_x2.rs
tests/ui/asm/*
```

After:
```
tests/assembly/asm/*
tests/codegen/asm/*
tests/ui/asm/*
```

I moved the remaining standalone test files into the asm directory, and then either removed the "asm-" suffix or for x86-specific registers tests replaced the "asm-" suffix with the "x86-" suffix.

(Then I noticed that there is no test for clobber_abi for already stabilized aarch64, arm, riscv, and loongarch64 asm... I don't believe there is a problem like rust-lang#131332, but I plan to add tests for them later.)

r? `@Amanieu`

`@rustbot` label +A-inline-assembly

Move remaining inline assembly test files into asm directory

Before:
```
tests/assembly/asm/*
tests/assembly/asm-comments.rs
tests/codegen/asm-target-clobbers.rs
tests/codegen/asm-goto.rs
tests/codegen/asm-maybe-uninit.rs
tests/codegen/asm-msp430-clobbers.rs
tests/codegen/asm-options.rs
tests/codegen/asm-clobbers.rs
tests/codegen/asm-may_unwind.rs
tests/codegen/asm-arm64ec-clobbers.rs
tests/codegen/asm-powerpc-clobbers.rs
tests/codegen/asm-sanitize-llvm.rs
tests/codegen/asm-s390x-clobbers.rs
tests/codegen/asm-clobber_abi.rs
tests/codegen/asm-multiple-options.rs
tests/codegen/global_asm.rs
tests/codegen/global_asm_include.rs
tests/codegen/global_asm_x2.rs
tests/ui/asm/*
```

After:
```
tests/assembly/asm/*
tests/codegen/asm/*
tests/ui/asm/*
```

I moved the remaining standalone test files into the asm directory, and then either removed the "asm-" suffix or for x86-specific registers tests replaced the "asm-" suffix with the "x86-" suffix.

(Then I noticed that there is no test for clobber_abi for already stabilized aarch64, arm, riscv, and loongarch64 asm... I don't believe there is a problem like rust-lang#131332, but I plan to add tests for them later.)

r? ``@Amanieu``

``@rustbot`` label +A-inline-assembly

Rollup merge of rust-lang#132456 - taiki-e:test-asm-dir, r=jieyouxu

Move remaining inline assembly test files into asm directory

Before:
```
tests/assembly/asm/*
tests/assembly/asm-comments.rs
tests/codegen/asm-target-clobbers.rs
tests/codegen/asm-goto.rs
tests/codegen/asm-maybe-uninit.rs
tests/codegen/asm-msp430-clobbers.rs
tests/codegen/asm-options.rs
tests/codegen/asm-clobbers.rs
tests/codegen/asm-may_unwind.rs
tests/codegen/asm-arm64ec-clobbers.rs
tests/codegen/asm-powerpc-clobbers.rs
tests/codegen/asm-sanitize-llvm.rs
tests/codegen/asm-s390x-clobbers.rs
tests/codegen/asm-clobber_abi.rs
tests/codegen/asm-multiple-options.rs
tests/codegen/global_asm.rs
tests/codegen/global_asm_include.rs
tests/codegen/global_asm_x2.rs
tests/ui/asm/*
```

After:
```
tests/assembly/asm/*
tests/codegen/asm/*
tests/ui/asm/*
```

I moved the remaining standalone test files into the asm directory, and then either removed the "asm-" suffix or for x86-specific registers tests replaced the "asm-" suffix with the "x86-" suffix.

(Then I noticed that there is no test for clobber_abi for already stabilized aarch64, arm, riscv, and loongarch64 asm... I don't believe there is a problem like rust-lang#131332, but I plan to add tests for them later.)

r? ``@Amanieu``

``@rustbot`` label +A-inline-assembly

…manieu,traviscross

Stabilize Arm64EC inline assembly

This stabilizes inline assembly for Arm64EC ("Emulation Compatible").

Corresponding reference PR: rust-lang/reference#1653

---

From the requirements of stabilization mentioned in rust-lang#93335

> Each architecture needs to be reviewed before stabilization:

> - It must have clobber_abi.

Done in rust-lang#131332.

> - It must be possible to clobber every register that is normally clobbered by a function call.

This is possible from the time of the initial implementation.

> - Generally review that the exposed register classes make sense.

The registers available in this target are a subset of those available in the AArch64 inline assembly which is already stable.

The following registers cannot be used in Arm64EC compared to AArch64:

- `x13`, `x14`, `x23`, `x24`, `x28` (register class: `reg`)
- `v[16-31]` (register class: `vreg`)
- `p[0-15]`, `ffr` (clobber-only register class `preg`)

These are disallowed by the ABI (see also [abi docs](https://learn.microsoft.com/en-us/cpp/build/arm64ec-windows-abi-conventions?view=msvc-170#register-mapping) for `reg`/`vreg` and rust-lang#131332 (comment) for `preg`).

Although not listed in the above requirements, preserves_flags is also implemented and the same as AArch64.

---

cc `@dpaoliello`

r? `@Amanieu`

`@rustbot` label O-windows O-AArch64 +A-inline-assembly +T-lang -T-compiler +needs-fcp

Rollup merge of rust-lang#131781 - taiki-e:arm64ec-stabilize-asm, r=Amanieu,traviscross

Stabilize Arm64EC inline assembly

This stabilizes inline assembly for Arm64EC ("Emulation Compatible").

Corresponding reference PR: rust-lang/reference#1653

---

From the requirements of stabilization mentioned in rust-lang#93335

> Each architecture needs to be reviewed before stabilization:

> - It must have clobber_abi.

Done in rust-lang#131332.

> - It must be possible to clobber every register that is normally clobbered by a function call.

This is possible from the time of the initial implementation.

> - Generally review that the exposed register classes make sense.

The registers available in this target are a subset of those available in the AArch64 inline assembly which is already stable.

The following registers cannot be used in Arm64EC compared to AArch64:

- `x13`, `x14`, `x23`, `x24`, `x28` (register class: `reg`)
- `v[16-31]` (register class: `vreg`)
- `p[0-15]`, `ffr` (clobber-only register class `preg`)

These are disallowed by the ABI (see also [abi docs](https://learn.microsoft.com/en-us/cpp/build/arm64ec-windows-abi-conventions?view=msvc-170#register-mapping) for `reg`/`vreg` and rust-lang#131332 (comment) for `preg`).

Although not listed in the above requirements, preserves_flags is also implemented and the same as AArch64.

---

cc `@dpaoliello`

r? `@Amanieu`

`@rustbot` label O-windows O-AArch64 +A-inline-assembly +T-lang -T-compiler +needs-fcp

…manieu,traviscross

Stabilize Arm64EC inline assembly

This stabilizes inline assembly for Arm64EC ("Emulation Compatible").

Corresponding reference PR: rust-lang/reference#1653

---

From the requirements of stabilization mentioned in rust-lang#93335

> Each architecture needs to be reviewed before stabilization:

> - It must have clobber_abi.

Done in rust-lang#131332.

> - It must be possible to clobber every register that is normally clobbered by a function call.

This is possible from the time of the initial implementation.

> - Generally review that the exposed register classes make sense.

The registers available in this target are a subset of those available in the AArch64 inline assembly which is already stable.

The following registers cannot be used in Arm64EC compared to AArch64:

- `x13`, `x14`, `x23`, `x24`, `x28` (register class: `reg`)
- `v[16-31]` (register class: `vreg`)
- `p[0-15]`, `ffr` (clobber-only register class `preg`)

These are disallowed by the ABI (see also [abi docs](https://learn.microsoft.com/en-us/cpp/build/arm64ec-windows-abi-conventions?view=msvc-170#register-mapping) for `reg`/`vreg` and rust-lang#131332 (comment) for `preg`).

Although not listed in the above requirements, preserves_flags is also implemented and the same as AArch64.

---

cc `@dpaoliello`

r? `@Amanieu`

`@rustbot` label O-windows O-AArch64 +A-inline-assembly +T-lang -T-compiler +needs-fcp