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// llvm/Transforms/IPO/PassManagerBuilder.h - Build Standard Pass -*- C++ -*-=//
//
// 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 defines the PassManagerBuilder class, which is used to set up a
// "standard" optimization sequence suitable for languages like C and C++.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_IPO_PASSMANAGERBUILDER_H
#define LLVM_TRANSFORMS_IPO_PASSMANAGERBUILDER_H
#include "llvm-c/Transforms/PassManagerBuilder.h"
#include <functional>
#include <string>
#include <vector>
namespace llvm {
class ModuleSummaryIndex;
class Pass;
class TargetLibraryInfoImpl;
// The old pass manager infrastructure is hidden in a legacy namespace now.
namespace legacy {
class FunctionPassManager;
class PassManagerBase;
}
/// PassManagerBuilder - This class is used to set up a standard optimization
/// sequence for languages like C and C++, allowing some APIs to customize the
/// pass sequence in various ways. A simple example of using it would be:
///
/// PassManagerBuilder Builder;
/// Builder.OptLevel = 2;
/// Builder.populateFunctionPassManager(FPM);
/// Builder.populateModulePassManager(MPM);
///
/// In addition to setting up the basic passes, PassManagerBuilder allows
/// frontends to vend a plugin API, where plugins are allowed to add extensions
/// to the default pass manager. They do this by specifying where in the pass
/// pipeline they want to be added, along with a callback function that adds
/// the pass(es). For example, a plugin that wanted to add a loop optimization
/// could do something like this:
///
/// static void addMyLoopPass(const PMBuilder &Builder, PassManagerBase &PM) {
/// if (Builder.getOptLevel() > 2 && Builder.getOptSizeLevel() == 0)
/// PM.add(createMyAwesomePass());
/// }
/// ...
/// Builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd,
/// addMyLoopPass);
/// ...
class PassManagerBuilder {
public:
/// Extensions are passed to the builder itself (so they can see how it is
/// configured) as well as the pass manager to add stuff to.
typedef std::function<void(const PassManagerBuilder &Builder,
legacy::PassManagerBase &PM)>
ExtensionFn;
typedef int GlobalExtensionID;
/// The Optimization Level - Specify the basic optimization level.
/// 0 = -O0, 1 = -O1, 2 = -O2, 3 = -O3
unsigned OptLevel;
/// SizeLevel - How much we're optimizing for size.
/// 0 = none, 1 = -Os, 2 = -Oz
unsigned SizeLevel;
/// LibraryInfo - Specifies information about the runtime library for the
/// optimizer. If this is non-null, it is added to both the function and
/// per-module pass pipeline.
TargetLibraryInfoImpl *LibraryInfo;
/// Inliner - Specifies the inliner to use. If this is non-null, it is
/// added to the per-module passes.
Pass *Inliner;
/// The module summary index to use for exporting information from the
/// regular LTO phase, for example for the CFI and devirtualization type
/// tests.
ModuleSummaryIndex *ExportSummary = nullptr;
/// The module summary index to use for importing information to the
/// thin LTO backends, for example for the CFI and devirtualization type
/// tests.
const ModuleSummaryIndex *ImportSummary = nullptr;
bool DisableUnrollLoops;
bool CallGraphProfile;
bool SLPVectorize;
bool LoopVectorize;
bool LoopsInterleaved;
bool DisableGVNLoadPRE;
bool ForgetAllSCEVInLoopUnroll;
bool VerifyInput;
bool VerifyOutput;
bool MergeFunctions;
bool DivergentTarget;
unsigned LicmMssaOptCap;
unsigned LicmMssaNoAccForPromotionCap;
public:
PassManagerBuilder();
~PassManagerBuilder();
private:
void addInitialAliasAnalysisPasses(legacy::PassManagerBase &PM) const;
void addFunctionSimplificationPasses(legacy::PassManagerBase &MPM);
void addVectorPasses(legacy::PassManagerBase &PM, bool IsFullLTO);
public:
/// populateFunctionPassManager - This fills in the function pass manager,
/// which is expected to be run on each function immediately as it is
/// generated. The idea is to reduce the size of the IR in memory.
void populateFunctionPassManager(legacy::FunctionPassManager &FPM);
/// populateModulePassManager - This sets up the primary pass manager.
void populateModulePassManager(legacy::PassManagerBase &MPM);
};
inline PassManagerBuilder *unwrap(LLVMPassManagerBuilderRef P) {
return reinterpret_cast<PassManagerBuilder*>(P);
}
inline LLVMPassManagerBuilderRef wrap(PassManagerBuilder *P) {
return reinterpret_cast<LLVMPassManagerBuilderRef>(P);
}
} // end namespace llvm
#endif
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