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[DRIVER][SYCL] Update the SYCL triple parsing for AMD (#15990)
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## Description

This PR improves the SYCL target triple parsing for AMD GPUs by
enforcing that the triple must be fully specified and explicit.
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jle-quel authored Dec 18, 2024
1 parent 33b50db commit ca955e5
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Showing 4 changed files with 29 additions and 5 deletions.
6 changes: 4 additions & 2 deletions clang/lib/Driver/Driver.cpp
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Expand Up @@ -823,8 +823,10 @@ static bool isValidSYCLTriple(llvm::Triple T) {
T.getOS() == llvm::Triple::CUDA && !T.hasEnvironment())
return true;

// AMDGCN is valid for SYCL
if (T.isAMDGCN())
// 'amdgcn-amd-amdhsa' is the valid SYCL triple for AMD GPUs.
if (T.getArch() == llvm::Triple::amdgcn &&
T.getVendor() == llvm::Triple::AMD && T.getOS() == llvm::Triple::AMDHSA &&
!T.hasEnvironment())
return true;

// Check for invalid SYCL device triple values.
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6 changes: 3 additions & 3 deletions clang/test/Driver/sycl-offload-new-driver.c
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Expand Up @@ -163,12 +163,12 @@
// WRAPPER_OPTIONS_BACKEND_AOT-SAME: "--cpu-tool-arg=-backend-cpu-opt"

/// Verify arch settings for nvptx and amdgcn targets
// RUN: %clangxx -fsycl -### -fsycl-targets=amdgcn-amd-gpu -fno-sycl-libspirv \
// RUN: %clangxx -fsycl -### -fsycl-targets=amdgcn-amd-amdhsa -fno-sycl-libspirv \
// RUN: -nocudalib --offload-new-driver \
// RUN: -Xsycl-target-backend=amdgcn-amd-gpu --offload-arch=gfx600 \
// RUN: -Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch=gfx600 \
// RUN: %s 2>&1 \
// RUN: | FileCheck -check-prefix AMD_ARCH %s
// AMD_ARCH: clang-offload-packager{{.*}} "--image=file={{.*}},triple=amdgcn-amd-gpu,arch=gfx600,kind=sycl,compile-opts=--offload-arch=gfx600"
// AMD_ARCH: clang-offload-packager{{.*}} "--image=file={{.*}},triple=amdgcn-amd-amdhsa,arch=gfx600,kind=sycl,compile-opts=--offload-arch=gfx600"

// RUN: %clangxx -fsycl -### -fsycl-targets=nvptx64-nvidia-cuda \
// RUN: -fno-sycl-libspirv -nocudalib --offload-new-driver %s 2>&1 \
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21 changes: 21 additions & 0 deletions clang/test/Driver/sycl-oneapi-gpu-amdgpu.cpp
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Expand Up @@ -136,6 +136,27 @@
// RUN: FileCheck %s --check-prefix=BAD_AMD_INPUT
// BAD_AMD_INPUT: error: SYCL target is invalid: 'amd_gpu_bad'

// Check the SYCL triple for AMD GPUs.
// RUN: %clangxx -fsycl -nogpulib -fsycl-targets=amdgcn-amd-amdhsa -### \
// RUN: -Xsycl-target-backend --offload-arch=gfx908 \
// RUN: -fsycl-libspirv-path=%S/Inputs/SYCL/libspirv.bc %s 2>&1 | \
// RUN: FileCheck %s --check-prefixes=AMD-TRIPLE
// AMD-TRIPLE: clang{{.*}} "-triple" "amdgcn-amd-amdhsa"

// Check if SYCL triples with 'Environment' component are rejected for AMD GPUs.
// RUN: not %clangxx -c -fsycl -nogpulib -fsycl-targets=amdgcn-amd-amdhsa-sycl -### %s 2>&1 | \
// RUN: FileCheck %s --check-prefix=BAD_TARGET_TRIPLE_ENV
// RUN: not %clang_cl -c -fsycl -fsycl-targets=amdgcn-amd-amdhsa-sycl -### %s 2>&1 | \
// RUN: FileCheck %s --check-prefix=BAD_TARGET_TRIPLE_ENV
// BAD_TARGET_TRIPLE_ENV: error: SYCL target is invalid: 'amdgcn-amd-amdhsa-sycl'

// Check for invalid SYCL triple for AMD GPUs.
// RUN: not %clangxx -c -fsycl -nogpulib -fsycl-targets=amdgcn -### %s 2>&1 | \
// RUN: FileCheck %s --check-prefix=BAD_TARGET_TRIPLE
// RUN: not %clang_cl -c -fsycl -fsycl-targets=amdgcn-amd -### %s 2>&1 | \
// RUN: FileCheck %s --check-prefix=BAD_TARGET_TRIPLE
// BAD_TARGET_TRIPLE: error: SYCL target is invalid: 'amdgcn{{.*}}'

/// Test for proper creation of fat object
// RUN: %clangxx -fsycl -nogpulib -fsycl-targets=amd_gpu_gfx700 \
// RUN: -fsycl-libspirv-path=%S/Inputs/SYCL/libspirv.bc \
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1 change: 1 addition & 0 deletions sycl/doc/UsersManual.md
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Expand Up @@ -40,6 +40,7 @@ and not recommended to use in production environment.
spir64_fpga-unknown-unknown, spir64_gen-unknown-unknown
Available in special build configuration:
* nvptx64-nvidia-cuda - generate code ahead of time for CUDA target;
* amdgcn-amd-amdhsa - generate code ahead of time for HIP target;
* native_cpu - allows to run SYCL applications with no need of an
additional backend (note that this feature is WIP and experimental, and
currently overrides all the other specified SYCL targets when enabled.)
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