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117 lines
4.1 KiB
117 lines
4.1 KiB
//===- ConvertToNVVMIR.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 + NVVM dialects and
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// LLVM IR with NVVM intrinsics and metadata.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Target/NVVMIR.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/NVVMDialect.h"
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#include "mlir/IR/BuiltinOps.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/IntrinsicsNVPTX.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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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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static llvm::Intrinsic::ID getShflBflyIntrinsicId(llvm::Type *resultType,
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bool withPredicate) {
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if (withPredicate) {
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resultType = cast<llvm::StructType>(resultType)->getElementType(0);
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return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_bfly_f32p
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: llvm::Intrinsic::nvvm_shfl_sync_bfly_i32p;
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}
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return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_bfly_f32
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: llvm::Intrinsic::nvvm_shfl_sync_bfly_i32;
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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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using LLVM::ModuleTranslation::ModuleTranslation;
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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/NVVMConversions.inc"
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return LLVM::ModuleTranslation::convertOperation(opInst, builder);
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}
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/// Allow access to the constructor.
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friend LLVM::ModuleTranslation;
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};
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} // namespace
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std::unique_ptr<llvm::Module>
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mlir::translateModuleToNVVMIR(Operation *m, llvm::LLVMContext &llvmContext,
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StringRef name) {
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auto llvmModule = LLVM::ModuleTranslation::translateModule<ModuleTranslation>(
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m, llvmContext, name);
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if (!llvmModule)
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return llvmModule;
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// Insert the nvvm.annotations kernel so that the NVVM backend recognizes the
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// function as a kernel.
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for (auto func :
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ModuleTranslation::getModuleBody(m).getOps<LLVM::LLVMFuncOp>()) {
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if (!gpu::GPUDialect::isKernel(func))
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continue;
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auto *llvmFunc = llvmModule->getFunction(func.getName());
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llvm::Metadata *llvmMetadata[] = {
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llvm::ValueAsMetadata::get(llvmFunc),
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llvm::MDString::get(llvmModule->getContext(), "kernel"),
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llvm::ValueAsMetadata::get(llvm::ConstantInt::get(
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llvm::Type::getInt32Ty(llvmModule->getContext()), 1))};
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llvm::MDNode *llvmMetadataNode =
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llvm::MDNode::get(llvmModule->getContext(), llvmMetadata);
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llvmModule->getOrInsertNamedMetadata("nvvm.annotations")
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->addOperand(llvmMetadataNode);
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}
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return llvmModule;
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}
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namespace mlir {
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void registerToNVVMIRTranslation() {
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TranslateFromMLIRRegistration registration(
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"mlir-to-nvvmir",
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[](ModuleOp module, raw_ostream &output) {
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llvm::LLVMContext llvmContext;
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auto llvmModule = mlir::translateModuleToNVVMIR(module, llvmContext);
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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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[](DialectRegistry ®istry) {
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registry.insert<LLVM::LLVMDialect, NVVM::NVVMDialect>();
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});
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}
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} // namespace mlir
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