[ROCm] Triton in XLA for ROCm - ir_emitter_triton related changes.

xla/service/gpu/fusions/triton.cc

@@ -42,7 +42,7 @@ limitations under the License.
 #include "tsl/platform/errors.h"
 #include "tsl/platform/statusor.h"
 
-#if GOOGLE_CUDA
+#if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
 #include "xla/service/gpu/ir_emitter_triton.h"
 #else
 #include "absl/status/status.h"
@@ -98,7 +98,7 @@ absl::StatusOr<FusionEmissionResult> TritonFusion::Emit(
     IrEmitterContext& ir_emitter_context,
     const HloFusionInstruction& fusion) const {
   llvm::IRBuilder builder(ir_emitter_context.llvm_module()->getContext());
-#if GOOGLE_CUDA
+#if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
   VLOG(3) << fusion.ToString();
   std::string suggested_kernel_name = std::string(fusion.name());
   TF_ASSIGN_OR_RETURN(
@@ -138,7 +138,7 @@ absl::StatusOr<FusionEmissionResult> TritonFusion::Emit(
           triton_wrapper_result,
           TritonWrapper(analysis, impl_fn_name, hlo_computation,
                         kTritonSoftmaxFusionKind,
-                        ir_emitter_context.cuda_compute_capability(),
+                        ir_emitter_context.gpu_compute_capability(),
                         ir_emitter_context.gpu_device_info(), config,
                         ir_emitter_context.llvm_module(), &EmitSoftMax,
                         *ir_emitter_context.mlir_context()));
@@ -165,7 +165,7 @@ absl::StatusOr<FusionEmissionResult> TritonFusion::Emit(
           triton_wrapper_result,
           TritonWrapper(analysis, impl_fn_name, hlo_computation,
                         kTritonGemmFusionKind,
-                        ir_emitter_context.cuda_compute_capability(),
+                        ir_emitter_context.gpu_compute_capability(),
                         ir_emitter_context.gpu_device_info(), config,
                         ir_emitter_context.llvm_module(), &EmitMatMul,
                         *ir_emitter_context.mlir_context()));
@@ -212,7 +212,7 @@ absl::StatusOr<FusionEmissionResult> TritonFusion::Emit(
 
   return result;
 #else
-  return absl::UnimplementedError("Triton support requires CUDA");
+  return absl::UnimplementedError("Triton support requires CUDA or ROCm");
 #endif
 }
 

xla/service/gpu/hlo_fusion_analysis.cc

@@ -202,7 +202,7 @@ HloFusionAnalysis::EmitterFusionKind HloFusionAnalysis::GetEmitterFusionKind()
     return EmitterFusionKind::kCustomFusion;
   }
 
-#if GOOGLE_CUDA
+#if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
   if (fusion_backend_config_.kind() == kTritonGemmFusionKind ||
       fusion_backend_config_.kind() == kTritonSoftmaxFusionKind) {
     return EmitterFusionKind::kTriton;

xla/service/gpu/ir_emitter_triton.cc

@@ -28,8 +28,10 @@ limitations under the License.
 #include <utility>
 #include <vector>
 
+#if GOOGLE_CUDA
 #include "nvidia/include/NVGPUToLLVM/NVGPUToLLVMPass.h"
 #include "nvidia/include/TritonNVIDIAGPUToLLVM/Passes.h"
+#endif
 #include "absl/algorithm/container.h"
 #include "absl/container/flat_hash_map.h"
 #include "absl/container/flat_hash_set.h"
@@ -50,6 +52,7 @@ limitations under the License.
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/TargetParser/Triple.h"
 #include "mlir/Conversion/ArithToLLVM/ArithToLLVM.h"  // from @llvm-project
+#include "mlir/Conversion/ControlFlowToLLVM/ControlFlowToLLVM.h" // from @llvm-project
 #include "mlir/Conversion/IndexToLLVM/IndexToLLVM.h"  // from @llvm-project
 #include "mlir/Conversion/SCFToControlFlow/SCFToControlFlow.h"  // from @llvm-project
 #include "mlir/Dialect/Arith/IR/Arith.h"  // from @llvm-project
@@ -83,6 +86,7 @@ limitations under the License.
 #include "mlir/Target/LLVMIR/Dialect/Builtin/BuiltinToLLVMIRTranslation.h"  // from @llvm-project
 #include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h"  // from @llvm-project
 #include "mlir/Target/LLVMIR/Dialect/NVVM/NVVMToLLVMIRTranslation.h"  // from @llvm-project
+#include "mlir/Target/LLVMIR/Dialect/ROCDL/ROCDLToLLVMIRTranslation.h"  // from @llvm-project
 #include "mlir/Target/LLVMIR/Export.h"  // from @llvm-project
 #include "mlir/Transforms/Passes.h"  // from @llvm-project
 #include "xla/autotuning.pb.h"
@@ -122,14 +126,21 @@ limitations under the License.
 #include "tsl/platform/path.h"
 #include "tsl/platform/status.h"
 #include "tsl/platform/statusor.h"
+#ifdef TENSORFLOW_USE_ROCM
+#include "tsl/platform/rocm_rocdl_path.h"
+#endif
 #include "tsl/platform/tensor_float_32_utils.h"
 #include "triton/Conversion/TritonGPUToLLVM/Passes.h"
 #include "triton/Conversion/TritonToTritonGPU/TritonToTritonGPUPass.h"
 #include "triton/Dialect/Triton/IR/Dialect.h"
 #include "triton/Dialect/Triton/IR/Types.h"
 #include "triton/Dialect/Triton/Transforms/Passes.h"
 #include "triton/Dialect/TritonGPU/Transforms/Passes.h"
+#ifndef TENSORFLOW_USE_ROCM
 #include "triton/Dialect/TritonNvidiaGPU/Transforms/Passes.h"
+#else
+#include "third_party/amd/include/TritonAMDGPUToLLVM/Passes.h"
+#endif
 
 namespace xla {
 namespace gpu {
@@ -410,10 +421,17 @@ Value EmitElementwise(ImplicitLocOpBuilder& b, absl::string_view libdevice_path,
     if (dev_fn_id.ok()) {
       return b.create<mt::ExternElementwiseOp>(
           inputs[0].getType(), inputs, "libdevice", libdevice_path,
+#ifdef TENSORFLOW_USE_ROCM
+          ObtainDeviceFunctionName(dev_fn_id.value(),
+                                   hlo.shape().element_type(),
+                                   llvm::Triple("amdgcn-unknown-unknown")),
+          /*pure=*/true);
+#else
           ObtainDeviceFunctionName(dev_fn_id.value(),
                                    hlo.shape().element_type(),
                                    llvm::Triple("nvptx64-unknown-unknown")),
           /*pure=*/true);
+#endif
     }
   }
   const bool is_integer =
@@ -744,11 +762,23 @@ absl::StatusOr<Value> EmitScope(
 // are some signs that show that this was intended to be used as an in-out
 // parameter which would give a hint to Triton which cluster dims we prefer to
 // use, but that's not the case currently.
+#if GOOGLE_CUDA
 absl::Status CreateTritonPipeline(
-    mlir::OpPassManager& pm, const se::CudaComputeCapability& cc,
+    mlir::OpPassManager& pm, const se::GpuComputeCapability& cc,
     const TritonGemmConfig& config,
     mt::nvidia_gpu::ClusterInfo& out_cluster_info) {
-  const int ccAsInt = cc.major * 10 + cc.minor;
+#else
+absl::Status CreateTritonPipeline(
+    mlir::OpPassManager& pm, const se::GpuComputeCapability& cc,
+    const TritonGemmConfig& config) {
+#endif
+
+#ifndef TENSORFLOW_USE_ROCM
+  auto cc = std::get<se::CudaComputeCapability>(gpu_version);
+  cont int ccAsInt = cc.major * 10 + cc.minor;
+#else
+  cont int ccAsInt = 0;
+#endif
   const int threadsPerWarp = 32;
 
   // Based on make_ttir() in
@@ -767,31 +797,40 @@ absl::Status CreateTritonPipeline(
   pm.addPass(mt::createConvertTritonToTritonGPUPass(
       config.num_warps, threadsPerWarp, config.num_ctas, ccAsInt));
   pm.addPass(mt::gpu::createCoalescePass());
+#ifndef TENSORFLOW_USE_ROCM
   pm.addPass(mlir::createTritonNvidiaGPUPlanCTAPass(&out_cluster_info));
+#endif
   pm.addPass(mt::gpu::createRemoveLayoutConversionsPass());
   pm.addPass(mt::gpu::createOptimizeThreadLocalityPass());
   pm.addPass(mt::gpu::createAccelerateMatmulPass(ccAsInt));
   pm.addPass(mt::gpu::createRemoveLayoutConversionsPass());
   pm.addPass(mt::gpu::createOptimizeDotOperandsPass());
   pm.addPass(mlir::createCSEPass());
-
+#ifndef TENSORFLOW_USE_ROCM
   if (cc.IsAtLeastAmpere()) {
     pm.addPass(mt::gpu::createPipelinePass(config.num_stages, config.num_warps,
                                            config.num_ctas, ccAsInt));
   }
   if (!cc.IsAtLeastHopper()) {
     pm.addPass(mt::gpu::createPrefetchPass());
   }
+#else
+  pm.addPass(mt::gpu::createPipelinePass(config.num_stages, config.num_warps,
+                                           config.num_ctas, ccAsInt));
+  pm.addPass(mt::gpu::createPrefetchPass());
+#endif
 
   pm.addPass(mt::gpu::createOptimizeDotOperandsPass());
   pm.addPass(mt::gpu::createRemoveLayoutConversionsPass());
   pm.addPass(mt::gpu::createReduceDataDuplicationPass());
   pm.addPass(mt::gpu::createReorderInstructionsPass());
   pm.addPass(mlir::createCSEPass());
   pm.addPass(mlir::createSymbolDCEPass());
+#ifndef TENSORFLOW_USE_ROCM
   if (cc.IsAtLeastHopper()) {
     pm.addPass(mlir::createTritonNvidiaGPUFenceInsertionPass(ccAsInt));
   }
+#endif
   pm.addPass(mlir::createCanonicalizerPass());
 
   // Based on make_llir() in
@@ -800,13 +839,21 @@ absl::Status CreateTritonPipeline(
   pm.addPass(mlir::createConvertSCFToCFPass());
   pm.addPass(mlir::createConvertIndexToLLVMPass());
   pm.addPass(mt::gpu::createAllocateSharedMemoryPass());
+#ifndef TENSORFLOW_USE_ROCM
   pm.addPass(mt::createConvertTritonGPUToLLVMPass(ccAsInt));
   pm.addPass(mt::createConvertNVGPUToLLVMPass());
+#else
+  pm.addPass(mt::createConvertTritonAMDGPUToLLVMPass());
+#endif
   pm.addPass(mlir::createArithToLLVMConversionPass());
   pm.addPass(mlir::createCanonicalizerPass());
   pm.addPass(mlir::createCSEPass());
   pm.addPass(mlir::createSymbolDCEPass());
   // Note: translateTritonGPUToLLVMIR adds line info with LLVMDIScopePass.
+#ifdef TENSORFLOW_USE_ROCM
+  pm.addPass(mlir::createConvertSCFToCFPass());
+  pm.addPass(mlir::createConvertControlFlowToLLVMPass());
+#endif
 
   return absl::OkStatus();
 }
@@ -2172,6 +2219,7 @@ absl::StatusOr<std::unique_ptr<llvm::Module>> TranslateLLVMToLLVMIR(
   mlir::registerBuiltinDialectTranslation(registry);
   mlir::registerLLVMDialectTranslation(registry);
   mlir::registerNVVMDialectTranslation(registry);
+  mlir::registerROCDLDialectTranslation(registry);
   module->getContext()->appendDialectRegistry(registry);
 
   std::unique_ptr<llvm::Module> llvmModule =
@@ -2198,9 +2246,18 @@ absl::StatusOr<std::unique_ptr<llvm::Module>> TranslateLLVMToLLVMIR(
 
 namespace {
 
-std::string GetLibdevicePath(const HloModuleConfig& hlo_config) {
+std::string GetLibdevicePath(const HloModuleConfig& hlo_config,
+                             const se::DeviceDescription& device_info) {
+#ifdef TENSORFLOW_USE_ROCM
+  std::string libdevice_dir = tsl::RocdlRoot();
+  auto compute_capability = device_info.rocm_compute_capability();
+  const std::string libdevice_path =
+    amdgpu::LibDevicePath(compute_capability.gcn_arch_name(), libdevice_dir);
+    return libdevice_path;
+#else
   return nvptx::LibDevicePath(
       hlo_config.debug_options().xla_gpu_cuda_data_dir());
+#endif
 }
 
 }  // namespace
@@ -2241,7 +2298,8 @@ absl::StatusOr<mlir::OwningOpRef<mlir::ModuleOp>> CreateTritonModule(
   b.setInsertionPointToStart(&fn.front());
 
   TF_RETURN_IF_ERROR(
-      ir_emitter(b, GetLibdevicePath(hlo_computation->parent()->config()),
+      ir_emitter(b, GetLibdevicePath(hlo_computation->parent()->config(),
+                                     device_info),
                  device_info, analysis, hlo_computation, fn, config));
 
   b.create<mt::ReturnOp>(loc);
@@ -2259,7 +2317,7 @@ absl::StatusOr<mlir::OwningOpRef<mlir::ModuleOp>> CreateTritonModule(
 absl::StatusOr<TritonWrapperResult> TritonWrapper(
     const TritonFusionAnalysis& analysis, absl::string_view fn_name,
     const HloComputation* hlo_computation, absl::string_view fusion_kind,
-    const se::CudaComputeCapability& cc,
+    const se::GpuComputeCapability& cc,
     const se::DeviceDescription& device_info, const TritonGemmConfig& config,
     llvm::Module* llvm_module, TritonIrEmitter ir_emitter,
     mlir::MLIRContext& mlir_context) {
@@ -2325,7 +2383,7 @@ absl::StatusOr<TritonWrapperResult> TritonWrapper(
 // TODO(b/325220878): Replace TritonGemmConfig with a more generic abstraction.
 absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
     const HloModuleConfig& hlo_config, absl::string_view hlo_module_name,
-    const se::CudaComputeCapability& cc,
+    const se::GpuComputeCapability& cc,
     const se::DeviceDescription& device_info, const TritonGemmConfig& config,
     mlir::ModuleOp triton_module, llvm::Module* llvm_module,
     mlir::MLIRContext& mlir_context) {
@@ -2369,8 +2427,13 @@ absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
     }
   }
 
+
+#if GOOGLE_CUDA
   mlir::triton::nvidia_gpu::ClusterInfo cluster_info;
   if (!CreateTritonPipeline(pm, cc, config, /*out*/ cluster_info).ok()) {
+#else
+  if (!CreateTritonPipeline(pm, cc, config).ok()) {
+#endif
     return Internal("Failed to create Triton pipeline.");
   }
   if (log_stream.has_value()) {
@@ -2383,6 +2446,18 @@ absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
   // llvm::Linker::linkModules() segfaults if we don't strip locations.
   pm.addPass(mlir::createStripDebugInfoPass());
 
+// TODO(ROCm): Check why call to loadAllAvailableDialects is necessary here.
+#ifdef TENSORFLOW_USE_ROCM
+  {
+    mlir::DialectRegistry registry;
+    mlir::registerBuiltinDialectTranslation(registry);
+    mlir::registerLLVMDialectTranslation(registry);
+    mlir::registerROCDLDialectTranslation(registry);
+    triton_module->getContext()->appendDialectRegistry(registry);
+    triton_module->getContext()->loadAllAvailableDialects();
+  }
+#endif // TENSORFLOW_USE_ROCM
+
   bool succeeded = mlir::succeeded(pm.run(triton_module));
 
   if (log_stream.has_value()) {
@@ -2397,16 +2472,18 @@ absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
       triton_module->getAttrOfType<mlir::IntegerAttr>("triton_gpu.shared")
           .getInt();
   VLOG(2) << "Shared memory usage: " << shared_mem_bytes << " B";
+#ifndef TENSORFLOW_USE_ROCM
   if (shared_mem_bytes > device_info.shared_memory_per_block_optin()) {
     return absl::ResourceExhaustedError(absl::StrFormat(
         "Shared memory size limit exceeded: requested %d, available: %d",
         shared_mem_bytes, device_info.shared_memory_per_block_optin()));
   }
+#endif
 
   TF_ASSIGN_OR_RETURN(
       std::unique_ptr<llvm::Module> ll_triton_module,
       TranslateLLVMToLLVMIR(&llvm_module->getContext(), triton_module,
-                            GetLibdevicePath(hlo_config)));
+                            GetLibdevicePath(hlo_config, device_info)));
   VLogModule(5, *ll_triton_module);
   if (should_verify) {
     VerifyModule(*ll_triton_module);
@@ -2425,6 +2502,7 @@ absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
     VerifyModule(*llvm_module);
   }
 
+#if GOOGLE_CUDA
   // `cluster_info` must be read after pm.run().
   std::optional<se::ClusterDim> cluster_dim;
   if (config.num_ctas > 1) {
@@ -2443,6 +2521,9 @@ absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
                  cluster_info.clusterDimZ == 1);
   }
   return {{shared_mem_bytes, cluster_dim}};
+#else
+  return {{shared_mem_bytes}};
+#endif
 }
 
 }  // namespace gpu

xla/service/gpu/ir_emitter_triton.h

@@ -83,7 +83,7 @@ using TritonIrEmitter = std::function<Status(
 absl::StatusOr<TritonWrapperResult> TritonWrapper(
     const TritonFusionAnalysis& analysis, absl::string_view fn_name,
     const HloComputation* hlo_computation, absl::string_view fusion_kind,
-    const se::CudaComputeCapability& cc,
+    const se::GpuComputeCapability& cc,
     const se::DeviceDescription& device_info, const TritonGemmConfig& config,
     llvm::Module* llvm_module, TritonIrEmitter ir_emitter,
     mlir::MLIRContext& mlir_context);
@@ -99,7 +99,7 @@ absl::StatusOr<mlir::OwningOpRef<mlir::ModuleOp>> CreateTritonModule(
 // Compiles a given Triton module to LLVM IR.
 absl::StatusOr<TritonWrapperResult> CompileTritonToLLVM(
     const HloModuleConfig& hlo_config, absl::string_view hlo_module_name,
-    const se::CudaComputeCapability& cc,
+    const se::GpuComputeCapability& cc,
     const se::DeviceDescription& device_info, const TritonGemmConfig& config,
     mlir::ModuleOp triton_module, llvm::Module* llvm_module,
     mlir::MLIRContext& mlir_context);

xla/service/gpu/llvm_gpu_backend/gpu_backend_lib.cc

@@ -941,6 +941,7 @@ void AMDGPUBackendInit(const DebugOptions& debug_options,
   LLVMInitializeAMDGPUTarget();
   LLVMInitializeAMDGPUTargetInfo();
   LLVMInitializeAMDGPUTargetMC();
+  LLVMInitializeAMDGPUAsmParser();
   LLVMInitializeAMDGPUAsmPrinter();
 #endif
 
@@ -952,6 +953,19 @@ void AMDGPUBackendInit(const DebugOptions& debug_options,
 }  // namespace
 
 namespace amdgpu {
+
+std::string LibDevicePath(std::string gcn_arch_name,
+                                      const std::string& rocdl_dir_path) {
+
+  auto libdevice_dir_paths = GetROCDLPaths(gcn_arch_name, rocdl_dir_path);
+  for (auto libdevice_dir_path : libdevice_dir_paths) {
+    if (libdevice_dir_path.find("ocml.bc")) {
+      return libdevice_dir_path;
+    }
+  }
+  return "";
+}
+
 absl::StatusOr<std::vector<uint8_t>> CompileToHsaco(
     llvm::Module* module, se::GpuComputeCapability gpu_version,
     const DebugOptions& debug_options,

xla/service/gpu/llvm_gpu_backend/gpu_backend_lib.h

@@ -60,6 +60,9 @@ absl::StatusOr<std::string> CompileToPtx(
 }  // namespace nvptx
 
 namespace amdgpu {
+// Get path to libdevice file.
+std::string LibDevicePath(std::string gcn_arch_name,
+                            const std::string& rocdl_dir_path);
 // Compiles the argument module and returns it with LLVM AMDGPU backend.
 // rocdl_dir_path is the parent directory of ROCm-Device-Libs bitcode libraries.
 // The contents of the module may be changed.