308571074c
This is an artifact from merging MLIR into LLVM, the file headers are now aligned with the rest of the project.
111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
//===- ConvertToROCDLIR.cpp - MLIR to LLVM IR conversion ------------------===//
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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 LLVM + ROCDL dialects and
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// LLVM IR with ROCDL intrinsics and metadata.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Target/ROCDLIR.h"
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#include "mlir/Dialect/GPU/GPUDialect.h"
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#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
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#include "mlir/Dialect/LLVMIR/ROCDLDialect.h"
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#include "mlir/IR/Function.h"
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#include "mlir/IR/Module.h"
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#include "mlir/Target/LLVMIR/ModuleTranslation.h"
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#include "mlir/Translation.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/IntrinsicsAMDGPU.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/ToolOutputFile.h"
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using namespace mlir;
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// Create a call to llvm intrinsic
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static llvm::Value *createIntrinsicCall(llvm::IRBuilder<> &builder,
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llvm::Intrinsic::ID intrinsic,
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ArrayRef<llvm::Value *> args = {}) {
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llvm::Module *module = builder.GetInsertBlock()->getModule();
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llvm::Function *fn = llvm::Intrinsic::getDeclaration(module, intrinsic);
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return builder.CreateCall(fn, args);
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}
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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::IRBuilder<> &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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namespace {
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class ModuleTranslation : public LLVM::ModuleTranslation {
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public:
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explicit ModuleTranslation(Operation *module)
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: LLVM::ModuleTranslation(module) {}
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~ModuleTranslation() override {}
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protected:
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LogicalResult convertOperation(Operation &opInst,
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llvm::IRBuilder<> &builder) override {
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#include "mlir/Dialect/LLVMIR/ROCDLConversions.inc"
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return LLVM::ModuleTranslation::convertOperation(opInst, builder);
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}
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};
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} // namespace
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std::unique_ptr<llvm::Module> mlir::translateModuleToROCDLIR(Operation *m) {
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ModuleTranslation translation(m);
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// lower MLIR (with RODL Dialect) to LLVM IR (with ROCDL intrinsics)
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auto llvmModule =
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LLVM::ModuleTranslation::translateModule<ModuleTranslation>(m);
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// foreach GPU kernel
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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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for (auto func :
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ModuleTranslation::getModuleBody(m).getOps<LLVM::LLVMFuncOp>()) {
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if (!func.getAttrOfType<UnitAttr>(gpu::GPUDialect::getKernelFuncAttrName()))
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continue;
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auto *llvmFunc = llvmModule->getFunction(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 llvmModule;
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}
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static TranslateFromMLIRRegistration
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registration("mlir-to-rocdlir", [](ModuleOp module, raw_ostream &output) {
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auto llvmModule = mlir::translateModuleToROCDLIR(module);
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if (!llvmModule)
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return failure();
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llvmModule->print(output, nullptr);
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return success();
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});
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