94 lines
3.8 KiB
C++
94 lines
3.8 KiB
C++
|
//===- TestLowerToLLVM.cpp - Test lowering to LLVM as a sink pass ---------===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, 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
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// This file implements a pass for testing the lowering to LLVM as a generally
|
||
|
|
// usable sink pass.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#include "mlir/Conversion/AffineToStandard/AffineToStandard.h"
|
||
|
|
#include "mlir/Conversion/FuncToLLVM/ConvertFuncToLLVMPass.h"
|
||
|
|
#include "mlir/Conversion/IndexToLLVM/IndexToLLVM.h"
|
||
|
|
#include "mlir/Conversion/MathToLLVM/MathToLLVM.h"
|
||
|
|
#include "mlir/Conversion/MemRefToLLVM/MemRefToLLVM.h"
|
||
|
|
#include "mlir/Conversion/ReconcileUnrealizedCasts/ReconcileUnrealizedCasts.h"
|
||
|
|
#include "mlir/Conversion/SCFToControlFlow/SCFToControlFlow.h"
|
||
|
|
#include "mlir/Conversion/VectorToLLVM/ConvertVectorToLLVMPass.h"
|
||
|
|
#include "mlir/Conversion/VectorToSCF/VectorToSCF.h"
|
||
|
|
#include "mlir/Dialect/Func/IR/FuncOps.h"
|
||
|
|
#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
|
||
|
|
#include "mlir/Dialect/Linalg/Passes.h"
|
||
|
|
#include "mlir/Dialect/MemRef/Transforms/Passes.h"
|
||
|
|
#include "mlir/IR/DialectRegistry.h"
|
||
|
|
#include "mlir/Pass/Pass.h"
|
||
|
|
#include "mlir/Pass/PassManager.h"
|
||
|
|
#include "mlir/Pass/PassOptions.h"
|
||
|
|
#include "mlir/Transforms/Passes.h"
|
||
|
|
|
||
|
|
using namespace mlir;
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
struct TestLowerToLLVMOptions
|
||
|
|
: public PassPipelineOptions<TestLowerToLLVMOptions> {
|
||
|
|
PassOptions::Option<bool> reassociateFPReductions{
|
||
|
|
*this, "reassociate-fp-reductions",
|
||
|
|
llvm::cl::desc("Allow reassociation og FP reductions"),
|
||
|
|
llvm::cl::init(false)};
|
||
|
|
};
|
||
|
|
|
||
|
|
void buildTestLowerToLLVM(OpPassManager &pm,
|
||
|
|
const TestLowerToLLVMOptions &options) {
|
||
|
|
|
||
|
|
// TODO: it is feasible to scope lowering at arbitrary level and introduce
|
||
|
|
// unrealized casts, but there needs to be the final module-wise cleanup in
|
||
|
|
// the end. Keep module-level for now.
|
||
|
|
|
||
|
|
// Blanket-convert any remaining high-level vector ops to loops if any remain.
|
||
|
|
pm.addNestedPass<func::FuncOp>(createConvertVectorToSCFPass());
|
||
|
|
// Blanket-convert any remaining linalg ops to loops if any remain.
|
||
|
|
pm.addNestedPass<func::FuncOp>(createConvertLinalgToLoopsPass());
|
||
|
|
// Blanket-convert any remaining affine ops if any remain.
|
||
|
|
pm.addPass(createLowerAffinePass());
|
||
|
|
// Convert SCF to CF (always needed).
|
||
|
|
pm.addPass(createConvertSCFToCFPass());
|
||
|
|
// Sprinkle some cleanups.
|
||
|
|
pm.addPass(createCanonicalizerPass());
|
||
|
|
pm.addPass(createCSEPass());
|
||
|
|
// Convert vector to LLVM (always needed).
|
||
|
|
pm.addPass(createConvertVectorToLLVMPass(
|
||
|
|
// TODO: add more options on a per-need basis.
|
||
|
|
ConvertVectorToLLVMPassOptions{options.reassociateFPReductions}));
|
||
|
|
// Convert Math to LLVM (always needed).
|
||
|
|
pm.addNestedPass<func::FuncOp>(createConvertMathToLLVMPass());
|
||
|
|
// Expand complicated MemRef operations before lowering them.
|
||
|
|
pm.addPass(memref::createExpandStridedMetadataPass());
|
||
|
|
// The expansion may create affine expressions. Get rid of them.
|
||
|
|
pm.addPass(createLowerAffinePass());
|
||
|
|
// Convert MemRef to LLVM (always needed).
|
||
|
|
pm.addPass(createFinalizeMemRefToLLVMConversionPass());
|
||
|
|
// Convert Func to LLVM (always needed).
|
||
|
|
pm.addPass(createConvertFuncToLLVMPass());
|
||
|
|
// Convert Index to LLVM (always needed).
|
||
|
|
pm.addPass(createConvertIndexToLLVMPass());
|
||
|
|
// Convert remaining unrealized_casts (always needed).
|
||
|
|
pm.addPass(createReconcileUnrealizedCastsPass());
|
||
|
|
}
|
||
|
|
} // namespace
|
||
|
|
|
||
|
|
namespace mlir {
|
||
|
|
namespace test {
|
||
|
|
void registerTestLowerToLLVM() {
|
||
|
|
PassPipelineRegistration<TestLowerToLLVMOptions>(
|
||
|
|
"test-lower-to-llvm",
|
||
|
|
"An example of pipeline to lower the main dialects (arith, linalg, "
|
||
|
|
"memref, scf, vector) down to LLVM.",
|
||
|
|
buildTestLowerToLLVM);
|
||
|
|
}
|
||
|
|
} // namespace test
|
||
|
|
} // namespace mlir
|