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

## Description

This PR improves the SYCL target triple parsing for AMD GPUs by
enforcing that the triple must be fully specified and explicit.

Author: jle-quel

clang/lib/Driver/Driver.cpp

@@ -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.

clang/test/Driver/sycl-offload-new-driver.c

@@ -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 \

clang/test/Driver/sycl-oneapi-gpu-amdgpu.cpp

@@ -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 \

sycl/doc/UsersManual.md

@@ -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.)