Add amdgpu target
Add target and compile the amdgpu llvm backend.
This commit is contained in:
Flakebi
parent
a730edcd67
commit
56795fb77a
16 changed files with 220 additions and 10 deletions
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@ -1908,6 +1908,8 @@ supported_targets! {
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("nvptx64-nvidia-cuda", nvptx64_nvidia_cuda),
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("amdgcn-amd-amdhsa", amdgcn_amd_amdhsa),
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("xtensa-esp32-none-elf", xtensa_esp32_none_elf),
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("xtensa-esp32-espidf", xtensa_esp32_espidf),
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("xtensa-esp32s2-none-elf", xtensa_esp32s2_none_elf),
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51
compiler/rustc_target/src/spec/targets/amdgcn_amd_amdhsa.rs
Normal file
51
compiler/rustc_target/src/spec/targets/amdgcn_amd_amdhsa.rs
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@ -0,0 +1,51 @@
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use crate::spec::{Cc, LinkerFlavor, Lld, PanicStrategy, Target, TargetOptions};
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pub(crate) fn target() -> Target {
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Target {
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arch: "amdgpu".into(),
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data_layout: "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-p9:192:256:256:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5-G1-ni:7:8:9".into(),
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llvm_target: "amdgcn-amd-amdhsa".into(),
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metadata: crate::spec::TargetMetadata {
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description: Some("AMD GPU".into()),
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tier: Some(3),
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host_tools: Some(false),
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std: Some(false),
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},
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pointer_width: 64,
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options: TargetOptions {
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os: "amdhsa".into(),
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vendor: "amd".into(),
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linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
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linker: Some("rust-lld".into()),
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// There are many CPUs, one for each hardware generation.
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// Require to set one explicitly as there is no good default.
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need_explicit_cpu: true,
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max_atomic_width: Some(64),
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// Unwinding on GPUs is not useful.
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panic_strategy: PanicStrategy::Abort,
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// amdgpu backend does not support libcalls.
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no_builtins: true,
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simd_types_indirect: false,
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// Allow `cdylib` crate type.
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dynamic_linking: true,
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only_cdylib: true,
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executables: false,
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dll_prefix: "".into(),
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dll_suffix: ".elf".into(),
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// The LLVM backend does not support stack canaries for this target
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supports_stack_protector: false,
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// Force LTO, object linking does not yet work with amdgpu.
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requires_lto: true,
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..Default::default()
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},
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}
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}
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@ -108,7 +108,7 @@
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# the resulting rustc being unable to compile for the disabled architectures.
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#
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# To add support for new targets, see https://rustc-dev-guide.rust-lang.org/building/new-target.html.
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#targets = "AArch64;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;Sparc;SystemZ;WebAssembly;X86"
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#targets = "AArch64;AMDGPU;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;Sparc;SystemZ;WebAssembly;X86"
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# LLVM experimental targets to build support for. These targets are specified in
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# the same format as above, but since these targets are experimental, they are
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@ -1,4 +1,4 @@
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Change this file to make users of the `download-ci-llvm` configuration download
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a new version of LLVM from CI, even if the LLVM submodule hasn’t changed.
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Last change is for: https://github.com/rust-lang/rust/pull/129788
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Last change is for: https://github.com/rust-lang/rust/pull/134740
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@ -331,7 +331,7 @@ impl Step for Llvm {
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let llvm_targets = match &builder.config.llvm_targets {
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Some(s) => s,
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None => {
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"AArch64;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\
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"AArch64;AMDGPU;ARM;BPF;Hexagon;LoongArch;MSP430;Mips;NVPTX;PowerPC;RISCV;\
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Sparc;SystemZ;WebAssembly;X86"
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}
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};
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@ -29,6 +29,7 @@
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- [\*-apple-watchos](platform-support/apple-watchos.md)
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- [\*-apple-visionos](platform-support/apple-visionos.md)
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- [aarch64-nintendo-switch-freestanding](platform-support/aarch64-nintendo-switch-freestanding.md)
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- [amdgcn-amd-amdhsa](platform-support/amdgcn-amd-amdhsa.md)
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- [armeb-unknown-linux-gnueabi](platform-support/armeb-unknown-linux-gnueabi.md)
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- [arm-none-eabi](platform-support/arm-none-eabi.md)
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- [armv4t-none-eabi](platform-support/armv4t-none-eabi.md)
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@ -272,6 +272,7 @@ target | std | host | notes
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`aarch64_be-unknown-linux-gnu` | ✓ | ✓ | ARM64 Linux (big-endian)
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`aarch64_be-unknown-linux-gnu_ilp32` | ✓ | ✓ | ARM64 Linux (big-endian, ILP32 ABI)
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[`aarch64_be-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | ARM64 NetBSD (big-endian)
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[`amdgcn-amd-amdhsa`](platform-support/amdgcn-amd-amdhsa.md) | * | | `-Ctarget-cpu=gfx...` to specify [the AMD GPU] to compile for
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[`arm64_32-apple-watchos`](platform-support/apple-watchos.md) | ✓ | | Arm Apple WatchOS 64-bit with 32-bit pointers
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[`arm64e-apple-darwin`](platform-support/arm64e-apple-darwin.md) | ✓ | ✓ | ARM64e Apple Darwin
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[`arm64e-apple-ios`](platform-support/arm64e-apple-ios.md) | ✓ | | ARM64e Apple iOS
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@ -432,3 +433,4 @@ target | std | host | notes
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[`xtensa-esp32s3-none-elf`](platform-support/xtensa.md) | * | | Xtensa ESP32-S3
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[runs on NVIDIA GPUs]: https://github.com/japaric-archived/nvptx#targets
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[the AMD GPU]: https://llvm.org/docs/AMDGPUUsage.html#processors
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111
src/doc/rustc/src/platform-support/amdgcn-amd-amdhsa.md
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111
src/doc/rustc/src/platform-support/amdgcn-amd-amdhsa.md
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@ -0,0 +1,111 @@
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# `amdgcn-amd-amdhsa`
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**Tier: 3**
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AMD GPU target for compute/HSA (Heterogeneous System Architecture).
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## Target maintainers
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- [@Flakebi](https://github.com/Flakebi)
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## Requirements
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AMD GPUs can be targeted via cross-compilation.
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Supported GPUs depend on the LLVM version that is used by Rust.
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In general, most GPUs starting from gfx7 (Sea Islands/CI) are supported as compilation targets, though older GPUs are not supported by the latest host runtime.
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Details about supported GPUs can be found in [LLVM’s documentation] and [ROCm documentation].
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Binaries can be loaded by [HIP] or by the HSA runtime implemented in [ROCR-Runtime].
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The format of binaries is a linked ELF.
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Binaries must be built with no-std.
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They can use `core` and `alloc` (`alloc` only if an allocator is supplied).
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At least one function needs to use the `"gpu-kernel"` calling convention and should be marked with `no_mangle` for simplicity.
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Functions using the `"gpu-kernel"` calling convention are kernel entrypoints and can be used from the host runtime.
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## Building the target
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The target is included in rustc.
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## Building Rust programs
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The amdgpu target supports many hardware generations, which need different binaries.
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The generations are exposed as different target-cpus in the backend.
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As there are many, Rust does not ship pre-compiled libraries for this target.
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Therefore, you have to build your own copy of `core` by using `cargo -Zbuild-std=core` or similar.
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To build a binary, create a no-std library:
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```rust,ignore (platform-specific)
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// src/lib.rs
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#![feature(abi_gpu_kernel)]
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#![no_std]
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#[panic_handler]
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fn panic(_: &core::panic::PanicInfo) -> ! {
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loop {}
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}
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#[no_mangle]
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pub extern "gpu-kernel" fn kernel(/* Arguments */) {
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// Code
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}
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```
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Build the library as `cdylib`:
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```toml
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# Cargo.toml
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[lib]
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crate-type = ["cdylib"]
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[profile.dev]
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lto = true # LTO must be explicitly enabled for now
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[profile.release]
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lto = true
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```
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The target-cpu must be from the list [supported by LLVM] (or printed with `rustc --target amdgcn-amd-amdhsa --print target-cpus`).
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The GPU version on the current system can be found e.g. with [`rocminfo`].
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Example `.cargo/config.toml` file to set the target and GPU generation:
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```toml
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# .cargo/config.toml
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[build]
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target = "amdgcn-amd-amdhsa"
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rustflags = ["-Ctarget-cpu=gfx1100"]
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[unstable]
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build-std = ["core"] # Optional: "alloc"
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```
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## Running Rust programs
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To run a binary on an AMD GPU, a host runtime is needed.
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On Linux and Windows, [HIP] can be used to load and run binaries.
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Example code on how to load a compiled binary and run it is available in [ROCm examples].
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On Linux, binaries can also run through the HSA runtime as implemented in [ROCR-Runtime].
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<!-- Mention an allocator once a suitable one exists for amdgpu -->
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<!--
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## Testing
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Does the target support running binaries, or do binaries have varying
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expectations that prevent having a standard way to run them? If users can run
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binaries, can they do so in some common emulator, or do they need native
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hardware? Does the target support running the Rust testsuite?
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-->
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## Additional information
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More information can be found on the [LLVM page for amdgpu].
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[LLVM’s documentation]: https://llvm.org/docs/AMDGPUUsage.html#processors
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[ROCm documentation]: https://rocmdocs.amd.com
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[HIP]: https://rocm.docs.amd.com/projects/HIP/
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[ROCR-Runtime]: https://github.com/ROCm/ROCR-Runtime
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[supported by LLVM]: https://llvm.org/docs/AMDGPUUsage.html#processors
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[LLVM page for amdgpu]: https://llvm.org/docs/AMDGPUUsage.html
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[`rocminfo`]: https://github.com/ROCm/rocminfo
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[ROCm examples]: https://github.com/ROCm/rocm-examples/tree/ca8ef5b6f1390176616cd1c18fbc98785cbc73f6/HIP-Basic/module_api
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@ -67,6 +67,7 @@ static TARGETS: &[&str] = &[
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"aarch64-unknown-none-softfloat",
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"aarch64-unknown-redox",
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"aarch64-unknown-uefi",
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"amdgcn-amd-amdhsa",
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"arm64e-apple-darwin",
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"arm64e-apple-ios",
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"arm64e-apple-tvos",
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21
tests/assembly/targets/targets-amdgpu.rs
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21
tests/assembly/targets/targets-amdgpu.rs
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@ -0,0 +1,21 @@
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//@ assembly-output: emit-asm
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// ignore-tidy-linelength
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//@ revisions: amdgcn_amd_amdhsa
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//@ [amdgcn_amd_amdhsa] compile-flags: --target amdgcn-amd-amdhsa -Ctarget-cpu=gfx900
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//@ [amdgcn_amd_amdhsa] needs-llvm-components: amdgpu
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// Sanity-check that each target can produce assembly code.
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#![feature(no_core, lang_items)]
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#![no_std]
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#![no_core]
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#![crate_type = "lib"]
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#[lang = "sized"]
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trait Sized {}
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pub fn test() -> u8 {
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42
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}
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// CHECK: .version
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4
tests/ui/amdgpu-require-explicit-cpu.nocpu.stderr
Normal file
4
tests/ui/amdgpu-require-explicit-cpu.nocpu.stderr
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@ -0,0 +1,4 @@
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error: target requires explicitly specifying a cpu with `-C target-cpu`
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error: aborting due to 1 previous error
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17
tests/ui/amdgpu-require-explicit-cpu.rs
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17
tests/ui/amdgpu-require-explicit-cpu.rs
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@ -0,0 +1,17 @@
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//@ revisions: nocpu cpu
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//@ no-prefer-dynamic
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//@ compile-flags: --crate-type=cdylib --target=amdgcn-amd-amdhsa
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//@ needs-llvm-components: amdgpu
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//@ needs-rust-lld
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//@[nocpu] error-pattern: target requires explicitly specifying a cpu
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//@[nocpu] build-fail
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//@[cpu] compile-flags: -Ctarget-cpu=gfx900
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//@[cpu] build-pass
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#![feature(no_core, lang_items)]
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#![no_core]
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#[lang="sized"]
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trait Sized {}
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pub fn foo() {}
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@ -14,7 +14,7 @@ warning: unexpected `cfg` condition value: `value`
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LL | #[cfg(target_vendor = "value")]
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| ^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
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= note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
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= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
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warning: unexpected `cfg` condition name: `feature`
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@ -15,7 +15,7 @@ warning: unexpected `cfg` condition value: `value`
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LL | #[cfg(target_vendor = "value")]
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| ^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
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= note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
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= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
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warning: unexpected `cfg` condition value: `unk`
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LL | #[cfg(target_vendor = "value")]
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| ^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
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= note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
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= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
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warning: unexpected `cfg` condition value: `unk`
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@ -138,7 +138,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
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LL | target_arch = "_UNEXPECTED_VALUE",
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_arch` are: `aarch64`, `arm`, `arm64ec`, `avr`, `bpf`, `csky`, `hexagon`, `loongarch64`, `m68k`, `mips`, `mips32r6`, `mips64`, `mips64r6`, `msp430`, `nvptx64`, `powerpc`, `powerpc64`, `riscv32`, `riscv64`, `s390x`, `sparc`, `sparc64`, `wasm32`, `wasm64`, `x86`, `x86_64`, and `xtensa`
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= note: expected values for `target_arch` are: `aarch64`, `amdgpu`, `arm`, `arm64ec`, `avr`, `bpf`, `csky`, `hexagon`, `loongarch64`, `m68k`, `mips`, `mips32r6`, `mips64`, `mips64r6`, `msp430`, `nvptx64`, `powerpc`, `powerpc64`, `riscv32`, `riscv64`, `s390x`, `sparc`, `sparc64`, `wasm32`, `wasm64`, `x86`, `x86_64`, and `xtensa`
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= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
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warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
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@ -201,7 +201,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
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LL | target_os = "_UNEXPECTED_VALUE",
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm`
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= note: expected values for `target_os` are: `aix`, `amdhsa`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm`
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= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
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warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
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@ -230,7 +230,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
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LL | target_vendor = "_UNEXPECTED_VALUE",
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: expected values for `target_vendor` are: `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
|
||||
= note: expected values for `target_vendor` are: `amd`, `apple`, `espressif`, `fortanix`, `ibm`, `kmc`, `mti`, `nintendo`, `nvidia`, `pc`, `risc0`, `sony`, `sun`, `unikraft`, `unknown`, `uwp`, `win7`, and `wrs`
|
||||
= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
|
||||
|
||||
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
|
||||
|
|
@ -274,7 +274,7 @@ LL | #[cfg(target_os = "linuz")] // testing that we suggest `linux`
|
|||
| |
|
||||
| help: there is a expected value with a similar name: `"linux"`
|
||||
|
|
||||
= note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm`
|
||||
= note: expected values for `target_os` are: `aix`, `amdhsa`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, `vita`, `vxworks`, `wasi`, `watchos`, `windows`, `xous`, and `zkvm`
|
||||
= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
|
||||
|
||||
warning: 28 warnings emitted
|
||||
|
|
|
|||
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