target: add arm64e-apple-visionos

compiler/rustc_target/src/spec/mod.rs

@@ -1615,6 +1615,7 @@ supported_targets! {
 
     ("aarch64-apple-visionos", aarch64_apple_visionos),
     ("aarch64-apple-visionos-sim", aarch64_apple_visionos_sim),
+    ("arm64e-apple-visionos", arm64e_apple_visionos),
 
     ("armebv7r-none-eabi", armebv7r_none_eabi),
     ("armebv7r-none-eabihf", armebv7r_none_eabihf),

compiler/rustc_target/src/spec/targets/arm64e_apple_visionos.rs

@@ -0,0 +1,25 @@
+use crate::spec::base::apple::{Arch, TargetEnv, base};
+use crate::spec::{Os, SanitizerSet, Target, TargetMetadata, TargetOptions};
+
+pub(crate) fn target() -> Target {
+    let (opts, llvm_target, arch) = base(Os::VisionOs, Arch::Arm64e, TargetEnv::Normal);
+    Target {
+        llvm_target,
+        metadata: TargetMetadata {
+            description: Some("ARM64e Apple visionOS".into()),
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(true),
+        },
+        pointer_width: 64,
+        data_layout: "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"
+            .into(),
+        arch,
+        options: TargetOptions {
+            features: "+neon,+apple-a12,+v8.3a,+paca,+pacg".into(),
+            max_atomic_width: Some(128),
+            supported_sanitizers: SanitizerSet::ADDRESS | SanitizerSet::THREAD,
+            ..opts
+        },
+    }
+}

src/bootstrap/src/core/sanity.rs

@@ -35,9 +35,7 @@ pub struct Finder {
 ///
 /// Targets can be removed from this list during the usual release process bootstrap compiler bumps,
 /// when the newly-bumped stage 0 compiler now knows about the formerly-missing targets.
-const STAGE0_MISSING_TARGETS: &[&str] = &[
-    // just a dummy comment so the list doesn't get onelined
-];
+const STAGE0_MISSING_TARGETS: &[&str] = &["arm64e-apple-visionos"];
 
 /// Minimum version threshold for libstdc++ required when using prebuilt LLVM
 /// from CI (with`llvm.download-ci-llvm` option).

src/doc/rustc/src/SUMMARY.md

@@ -46,6 +46,7 @@
         - [arm64e-apple-tvos](platform-support/arm64e-apple-tvos.md)
     - [\*-apple-watchos](platform-support/apple-watchos.md)
     - [\*-apple-visionos](platform-support/apple-visionos.md)
+        - [arm64e-apple-visionos](platform-support/arm64e-apple-visionos.md)
     - [aarch64-nintendo-switch-freestanding](platform-support/aarch64-nintendo-switch-freestanding.md)
     - [aarch64-unknown-linux-gnu](platform-support/aarch64-unknown-linux-gnu.md)
     - [aarch64-unknown-linux-musl](platform-support/aarch64-unknown-linux-musl.md)

src/doc/rustc/src/platform-support.md

@@ -292,6 +292,7 @@ target | std | host | notes
 [`arm64e-apple-darwin`](platform-support/arm64e-apple-darwin.md)  | ✓ | ✓ | ARM64e Apple Darwin
 [`arm64e-apple-ios`](platform-support/arm64e-apple-ios.md) | ✓ |  | ARM64e Apple iOS
 [`arm64e-apple-tvos`](platform-support/arm64e-apple-tvos.md)  | ✓ |  | ARM64e Apple tvOS
+[`arm64e-apple-visionos`](platform-support/arm64e-apple-visionos.md) | ✓ |  | arm64e Apple visionOS
 [`armeb-unknown-linux-gnueabi`](platform-support/armeb-unknown-linux-gnueabi.md) | ✓ | ? | Arm BE8 the default Arm big-endian architecture since [Armv6](https://developer.arm.com/documentation/101754/0616/armlink-Reference/armlink-Command-line-Options/--be8?lang=en).
 [`armebv7r-none-eabi`](platform-support/armebv7r-none-eabi.md) | * |  | Bare Armv7-R, Big Endian
 [`armebv7r-none-eabihf`](platform-support/armebv7r-none-eabi.md) | * |  | Bare Armv7-R, Big Endian, hardfloat

src/doc/rustc/src/platform-support/arm64e-apple-visionos.md

@@ -0,0 +1,46 @@
+# `arm64e-apple-visionos`
+
+**Tier: 3**
+
+Apple arm64e visionOS.
+
+## Target maintainers
+
+[@cypherair](https://github.com/cypherair)
+
+## Requirements
+
+This target is cross-compiled and supports `std`.
+
+This target requires the visionOS SDK provided by Xcode.
+
+The deployment target can be configured with `XROS_DEPLOYMENT_TARGET`.
+
+## Building the target
+
+You can build Rust with support for the target by adding it to the `target`
+list in `bootstrap.toml`:
+```toml
+[build]
+target = ["arm64e-apple-visionos"]
+```
+
+## Building Rust programs
+
+Rust does not yet ship pre-compiled artifacts for this target.
+To compile for this target, you will need to build Rust with the target enabled.
+
+## Testing
+
+This target is not tested by Rust CI.
+
+Binaries are intended to run on visionOS devices with `arm64e` architecture.
+
+The visionOS simulator targets use `arm64`, not `arm64e`.
+
+## Cross-compilation toolchains and C code
+
+C code should be built with Apple's Clang from Xcode, using the visionOS SDK and
+matching deployment target.
+
+The Clang target is suffixed with `-xros`.

tests/assembly-llvm/targets/targets-macho.rs

@@ -34,6 +34,9 @@
 //@ revisions: aarch64_apple_visionos
 //@ [aarch64_apple_visionos] compile-flags: --target aarch64-apple-visionos
 //@ [aarch64_apple_visionos] needs-llvm-components: aarch64
+//@ revisions: arm64e_apple_visionos
+//@ [arm64e_apple_visionos] compile-flags: --target arm64e-apple-visionos
+//@ [arm64e_apple_visionos] needs-llvm-components: aarch64
 //@ revisions: aarch64_apple_visionos_sim
 //@ [aarch64_apple_visionos_sim] compile-flags: --target aarch64-apple-visionos-sim
 //@ [aarch64_apple_visionos_sim] needs-llvm-components: aarch64