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//===- SerializeNVVMTarget.cpp ----------------------------------*- C++ -*-===//
//
// This file is licensed under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "mlir/Config/mlir-config.h"
#include "mlir/Dialect/GPU/IR/GPUDialect.h"
#include "mlir/Dialect/LLVMIR/NVVMDialect.h"
#include "mlir/IR/MLIRContext.h"
#include "mlir/InitAllDialects.h"
#include "mlir/Parser/Parser.h"
#include "mlir/Target/LLVM/NVVM/Target.h"
#include "mlir/Target/LLVMIR/Dialect/Builtin/BuiltinToLLVMIRTranslation.h"
#include "mlir/Target/LLVMIR/Dialect/GPU/GPUToLLVMIRTranslation.h"
#include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h"
#include "mlir/Target/LLVMIR/Dialect/NVVM/NVVMToLLVMIRTranslation.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/MemoryBufferRef.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Host.h"
#include "gmock/gmock.h"
using namespace mlir;
// Skip the test if the NVPTX target was not built.
#if LLVM_HAS_NVPTX_TARGET
#define SKIP_WITHOUT_NVPTX(x) x
#else
#define SKIP_WITHOUT_NVPTX(x) DISABLED_##x
#endif
class MLIRTargetLLVMNVVM : public ::testing::Test {
protected:
void SetUp() override {
registerBuiltinDialectTranslation(registry);
registerLLVMDialectTranslation(registry);
registerGPUDialectTranslation(registry);
registerNVVMDialectTranslation(registry);
NVVM::registerNVVMTargetInterfaceExternalModels(registry);
}
// Checks if PTXAS is in PATH.
bool hasPtxas() {
// Find the `ptxas` compiler.
std::optional<std::string> ptxasCompiler =
llvm::sys::Process::FindInEnvPath("PATH", "ptxas");
return ptxasCompiler.has_value();
}
// Dialect registry.
DialectRegistry registry;
// MLIR module used for the tests.
const std::string moduleStr = R"mlir(
gpu.module @nvvm_test {
llvm.func @nvvm_kernel(%arg0: f32) attributes {gpu.kernel, nvvm.kernel} {
llvm.return
}
})mlir";
};
// Test NVVM serialization to LLVM.
TEST_F(MLIRTargetLLVMNVVM, SKIP_WITHOUT_NVPTX(SerializeNVVMMToLLVM)) {
MLIRContext context(registry);
OwningOpRef<ModuleOp> module =
parseSourceString<ModuleOp>(moduleStr, &context);
ASSERT_TRUE(!!module);
// Create an NVVM target.
NVVM::NVVMTargetAttr target = NVVM::NVVMTargetAttr::get(&context);
// Serialize the module.
auto serializer = dyn_cast<gpu::TargetAttrInterface>(target);
ASSERT_TRUE(!!serializer);
gpu::TargetOptions options("", {}, "", gpu::CompilationTarget::Offload);
for (auto gpuModule : (*module).getBody()->getOps<gpu::GPUModuleOp>()) {
std::optional<SmallVector<char, 0>> object =
serializer.serializeToObject(gpuModule, options);
// Check that the serializer was successful.
ASSERT_TRUE(object != std::nullopt);
ASSERT_TRUE(!object->empty());
// Read the serialized module.
llvm::MemoryBufferRef buffer(StringRef(object->data(), object->size()),
"module");
llvm::LLVMContext llvmContext;
llvm::Expected<std::unique_ptr<llvm::Module>> llvmModule =
llvm::getLazyBitcodeModule(buffer, llvmContext);
ASSERT_TRUE(!!llvmModule);
ASSERT_TRUE(!!*llvmModule);
// Check that it has a function named `foo`.
ASSERT_TRUE((*llvmModule)->getFunction("nvvm_kernel") != nullptr);
}
}
// Test NVVM serialization to PTX.
TEST_F(MLIRTargetLLVMNVVM, SKIP_WITHOUT_NVPTX(SerializeNVVMToPTX)) {
MLIRContext context(registry);
OwningOpRef<ModuleOp> module =
parseSourceString<ModuleOp>(moduleStr, &context);
ASSERT_TRUE(!!module);
// Create an NVVM target.
NVVM::NVVMTargetAttr target = NVVM::NVVMTargetAttr::get(&context);
// Serialize the module.
auto serializer = dyn_cast<gpu::TargetAttrInterface>(target);
ASSERT_TRUE(!!serializer);
gpu::TargetOptions options("", {}, "", gpu::CompilationTarget::Assembly);
for (auto gpuModule : (*module).getBody()->getOps<gpu::GPUModuleOp>()) {
std::optional<SmallVector<char, 0>> object =
serializer.serializeToObject(gpuModule, options);
// Check that the serializer was successful.
ASSERT_TRUE(object != std::nullopt);
ASSERT_TRUE(!object->empty());
ASSERT_TRUE(
StringRef(object->data(), object->size()).contains("nvvm_kernel"));
}
}
// Test NVVM serialization to Binary.
TEST_F(MLIRTargetLLVMNVVM, SKIP_WITHOUT_NVPTX(SerializeNVVMToBinary)) {
if (!hasPtxas())
GTEST_SKIP() << "PTXAS compiler not found, skipping test.";
MLIRContext context(registry);
OwningOpRef<ModuleOp> module =
parseSourceString<ModuleOp>(moduleStr, &context);
ASSERT_TRUE(!!module);
// Create an NVVM target.
NVVM::NVVMTargetAttr target = NVVM::NVVMTargetAttr::get(&context);
// Serialize the module.
auto serializer = dyn_cast<gpu::TargetAttrInterface>(target);
ASSERT_TRUE(!!serializer);
gpu::TargetOptions options("", {}, "", gpu::CompilationTarget::Binary);
for (auto gpuModule : (*module).getBody()->getOps<gpu::GPUModuleOp>()) {
std::optional<SmallVector<char, 0>> object =
serializer.serializeToObject(gpuModule, options);
// Check that the serializer was successful.
ASSERT_TRUE(object != std::nullopt);
ASSERT_TRUE(!object->empty());
}
}
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