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a8f6b5763e
The default and pre-link pipeline builders currently require you to call a separate method for optimization level O0, even though they have perfectly well-defined O0 optimization pipelines. Accept O0 optimization level and call buildO0DefaultPipeline() internally, so all consumers don't need to repeat this. Differential Revision: https://reviews.llvm.org/D146200
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
//===- OptUtils.cpp - MLIR Execution Engine optimization pass utilities ---===//
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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 the utility functions to trigger LLVM optimizations from
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// MLIR Execution Engine.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/ExecutionEngine/OptUtils.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Passes/OptimizationLevel.h"
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#include "llvm/Passes/PassBuilder.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/FormatVariadic.h"
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#include "llvm/Target/TargetMachine.h"
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#include <optional>
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using namespace llvm;
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static std::optional<OptimizationLevel> mapToLevel(unsigned optLevel,
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unsigned sizeLevel) {
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switch (optLevel) {
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case 0:
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return OptimizationLevel::O0;
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case 1:
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return OptimizationLevel::O1;
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case 2:
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switch (sizeLevel) {
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case 0:
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return OptimizationLevel::O2;
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case 1:
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return OptimizationLevel::Os;
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case 2:
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return OptimizationLevel::Oz;
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}
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break;
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case 3:
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return OptimizationLevel::O3;
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}
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return std::nullopt;
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}
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// Create and return a lambda that uses LLVM pass manager builder to set up
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// optimizations based on the given level.
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std::function<Error(Module *)>
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mlir::makeOptimizingTransformer(unsigned optLevel, unsigned sizeLevel,
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TargetMachine *targetMachine) {
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return [optLevel, sizeLevel, targetMachine](Module *m) -> Error {
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std::optional<OptimizationLevel> ol = mapToLevel(optLevel, sizeLevel);
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if (!ol) {
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return make_error<StringError>(
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formatv("invalid optimization/size level {0}/{1}", optLevel,
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sizeLevel)
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.str(),
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inconvertibleErrorCode());
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}
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LoopAnalysisManager lam;
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FunctionAnalysisManager fam;
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CGSCCAnalysisManager cgam;
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ModuleAnalysisManager mam;
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PipelineTuningOptions tuningOptions;
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tuningOptions.LoopUnrolling = true;
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tuningOptions.LoopInterleaving = true;
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tuningOptions.LoopVectorization = true;
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tuningOptions.SLPVectorization = true;
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PassBuilder pb(targetMachine, tuningOptions);
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pb.registerModuleAnalyses(mam);
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pb.registerCGSCCAnalyses(cgam);
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pb.registerFunctionAnalyses(fam);
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pb.registerLoopAnalyses(lam);
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pb.crossRegisterProxies(lam, fam, cgam, mam);
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ModulePassManager mpm;
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mpm.addPass(pb.buildPerModuleDefaultPipeline(*ol));
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mpm.run(*m, mam);
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return Error::success();
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};
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}
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