9cd47a26d5
Make sure they can only be attached to LLVM functions as a result of converting GPU functions to the LLVM Dialect.
68 lines
2.8 KiB
C++
68 lines
2.8 KiB
C++
//===- ROCDLToLLVMIRTranslation.cpp - Translate ROCDL to LLVM IR ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a translation between the MLIR ROCDL dialect and
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// LLVM IR.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Target/LLVMIR/Dialect/ROCDL/ROCDLToLLVMIRTranslation.h"
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#include "mlir/Dialect/LLVMIR/ROCDLDialect.h"
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#include "mlir/IR/Operation.h"
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#include "mlir/Target/LLVMIR/ModuleTranslation.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/IntrinsicsAMDGPU.h"
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using namespace mlir;
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using namespace mlir::LLVM;
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using mlir::LLVM::detail::createIntrinsicCall;
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// Create a call to ROCm-Device-Library function
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// Currently this routine will work only for calling ROCDL functions that
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// take a single int32 argument. It is likely that the interface of this
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// function will change to make it more generic.
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static llvm::Value *createDeviceFunctionCall(llvm::IRBuilderBase &builder,
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StringRef fn_name, int parameter) {
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llvm::Module *module = builder.GetInsertBlock()->getModule();
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llvm::FunctionType *function_type = llvm::FunctionType::get(
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llvm::Type::getInt64Ty(module->getContext()), // return type.
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llvm::Type::getInt32Ty(module->getContext()), // parameter type.
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false); // no variadic arguments.
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llvm::Function *fn = dyn_cast<llvm::Function>(
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module->getOrInsertFunction(fn_name, function_type).getCallee());
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llvm::Value *fn_op0 = llvm::ConstantInt::get(
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llvm::Type::getInt32Ty(module->getContext()), parameter);
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return builder.CreateCall(fn, ArrayRef<llvm::Value *>(fn_op0));
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}
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LogicalResult mlir::ROCDLDialectLLVMIRTranslationInterface::convertOperation(
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Operation *op, llvm::IRBuilderBase &builder,
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LLVM::ModuleTranslation &moduleTranslation) const {
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Operation &opInst = *op;
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#include "mlir/Dialect/LLVMIR/ROCDLConversions.inc"
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return failure();
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}
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LogicalResult mlir::ROCDLDialectLLVMIRTranslationInterface::amendOperation(
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Operation *op, NamedAttribute attribute,
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LLVM::ModuleTranslation &moduleTranslation) const {
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if (attribute.first == ROCDL::ROCDLDialect::getKernelFuncAttrName()) {
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auto func = cast<LLVM::LLVMFuncOp>(op);
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// For GPU kernels,
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// 1. Insert AMDGPU_KERNEL calling convention.
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// 2. Insert amdgpu-flat-workgroup-size(1, 1024) attribute.
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llvm::Function *llvmFunc = moduleTranslation.lookupFunction(func.getName());
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llvmFunc->setCallingConv(llvm::CallingConv::AMDGPU_KERNEL);
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llvmFunc->addFnAttr("amdgpu-flat-work-group-size", "1, 1024");
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}
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return success();
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}
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