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. More...

#include "llvm/Transforms/IPO/PassManagerBuilder.h"

Collaboration diagram for llvm::PassManagerBuilder:

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Public Types
enum	ExtensionPointTy { EP_EarlyAsPossible, EP_ModuleOptimizerEarly, EP_LoopOptimizerEnd, EP_ScalarOptimizerLate, EP_OptimizerLast, EP_VectorizerStart, EP_EnabledOnOptLevel0, EP_Peephole, EP_LateLoopOptimizations, EP_CGSCCOptimizerLate, EP_FullLinkTimeOptimizationEarly, EP_FullLinkTimeOptimizationLast }

typedef std::function< void(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)>	ExtensionFn
	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. More...

typedef int	GlobalExtensionID

Public Member Functions
	PassManagerBuilder ()

	~PassManagerBuilder ()

void	addExtension (ExtensionPointTy Ty, ExtensionFn Fn)

void	populateFunctionPassManager (legacy::FunctionPassManager &FPM)
	populateFunctionPassManager - This fills in the function pass manager, which is expected to be run on each function immediately as it is generated. More...

void	populateModulePassManager (legacy::PassManagerBase &MPM)
	populateModulePassManager - This sets up the primary pass manager. More...

Static Public Member Functions
static GlobalExtensionID	addGlobalExtension (ExtensionPointTy Ty, ExtensionFn Fn)
	Adds an extension that will be used by all PassManagerBuilder instances. More...

static void	removeGlobalExtension (GlobalExtensionID ExtensionID)
	Removes an extension that was previously added using addGlobalExtension. More...

Public Attributes
unsigned	OptLevel
	The Optimization Level - Specify the basic optimization level. More...

unsigned	SizeLevel
	SizeLevel - How much we're optimizing for size. More...

TargetLibraryInfoImpl *	LibraryInfo
	LibraryInfo - Specifies information about the runtime library for the optimizer. More...

Pass *	Inliner
	Inliner - Specifies the inliner to use. More...

ModuleSummaryIndex *	ExportSummary = nullptr
	The module summary index to use for exporting information from the regular LTO phase, for example for the CFI and devirtualization type tests. More...

const ModuleSummaryIndex *	ImportSummary = nullptr
	The module summary index to use for importing information to the thin LTO backends, for example for the CFI and devirtualization type tests. More...

bool	DisableUnrollLoops

bool	CallGraphProfile

bool	SLPVectorize

bool	LoopVectorize

bool	LoopsInterleaved

bool	RerollLoops

bool	NewGVN

bool	DisableGVNLoadPRE

bool	ForgetAllSCEVInLoopUnroll

bool	VerifyInput

bool	VerifyOutput

bool	MergeFunctions

bool	DivergentTarget

unsigned	LicmMssaOptCap

unsigned	LicmMssaNoAccForPromotionCap

Detailed Description

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); ...

Definition at line 57 of file PassManagerBuilder.h.

Member Typedef Documentation

◆ ExtensionFn

typedef std::function<void(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)> llvm::PassManagerBuilder::ExtensionFn

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.

Definition at line 63 of file PassManagerBuilder.h.

◆ GlobalExtensionID

typedef int llvm::PassManagerBuilder::GlobalExtensionID

Definition at line 64 of file PassManagerBuilder.h.

Member Enumeration Documentation

◆ ExtensionPointTy

enum llvm::PassManagerBuilder::ExtensionPointTy

Enumerator
EP_EarlyAsPossible	EP_EarlyAsPossible - This extension point allows adding passes before any other transformations, allowing them to see the code as it is coming out of the frontend.
EP_ModuleOptimizerEarly	EP_ModuleOptimizerEarly - This extension point allows adding passes just before the main module-level optimization passes.
EP_LoopOptimizerEnd	EP_LoopOptimizerEnd - This extension point allows adding loop passes to the end of the loop optimizer.
EP_ScalarOptimizerLate	EP_ScalarOptimizerLate - This extension point allows adding optimization passes after most of the main optimizations, but before the last cleanup-ish optimizations.
EP_OptimizerLast	EP_OptimizerLast – This extension point allows adding passes that run after everything else.
EP_VectorizerStart	EP_VectorizerStart - This extension point allows adding optimization passes before the vectorizer and other highly target specific optimization passes are executed.
EP_EnabledOnOptLevel0	EP_EnabledOnOptLevel0 - This extension point allows adding passes that should not be disabled by O0 optimization level. The passes will be inserted after the inlining pass.
EP_Peephole	EP_Peephole - This extension point allows adding passes that perform peephole optimizations similar to the instruction combiner. These passes will be inserted after each instance of the instruction combiner pass.
EP_LateLoopOptimizations	EP_LateLoopOptimizations - This extension point allows adding late loop canonicalization and simplification passes. This is the last point in the loop optimization pipeline before loop deletion. Each pass added here must be an instance of LoopPass. This is the place to add passes that can remove loops, such as target- specific loop idiom recognition.
EP_CGSCCOptimizerLate	EP_CGSCCOptimizerLate - This extension point allows adding CallGraphSCC passes at the end of the main CallGraphSCC passes and before any function simplification passes run by CGPassManager.
EP_FullLinkTimeOptimizationEarly	EP_FullLinkTimeOptimizationEarly - This extensions point allow adding passes that run at Link Time, before Full Link Time Optimization.
EP_FullLinkTimeOptimizationLast	EP_FullLinkTimeOptimizationLast - This extensions point allow adding passes that run at Link Time, after Full Link Time Optimization.

Definition at line 66 of file PassManagerBuilder.h.

Constructor & Destructor Documentation

◆ PassManagerBuilder()

PassManagerBuilder::PassManagerBuilder ( )

◆ ~PassManagerBuilder()

PassManagerBuilder::~PassManagerBuilder ( )

Definition at line 191 of file PassManagerBuilder.cpp.

References Inliner, and LibraryInfo.

Member Function Documentation

◆ addExtension()

void PassManagerBuilder::addExtension	(	ExtensionPointTy	Ty,
		ExtensionFn	Fn
	)

Definition at line 237 of file PassManagerBuilder.cpp.

References move.

Referenced by llvm::HexagonTargetMachine::adjustPassManager().

◆ addGlobalExtension()

PassManagerBuilder::GlobalExtensionID PassManagerBuilder::addGlobalExtension	(	PassManagerBuilder::ExtensionPointTy	Ty,
		PassManagerBuilder::ExtensionFn	Fn
	)

static

Adds an extension that will be used by all PassManagerBuilder instances.

This is intended to be used by plugins, to register a set of optimisations to run automatically.

Returns: A global extension identifier that can be used to remove the extension.

Definition at line 213 of file PassManagerBuilder.cpp.

References GlobalExtensions, GlobalExtensionsCounter, and move.

Referenced by llvm::RegisterStandardPasses::RegisterStandardPasses().

◆ populateFunctionPassManager()

void PassManagerBuilder::populateFunctionPassManager ( legacy::FunctionPassManager & FPM )

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.

Definition at line 278 of file PassManagerBuilder.cpp.

References llvm::legacy::FunctionPassManager::add(), llvm::createCFGSimplificationPass(), llvm::createEarlyCSEPass(), llvm::createLowerExpectIntrinsicPass(), llvm::createLowerMatrixIntrinsicsMinimalPass(), llvm::createSROAPass(), llvm::EnableMatrix, EP_EarlyAsPossible, LibraryInfo, and OptLevel.

◆ populateModulePassManager()

void PassManagerBuilder::populateModulePassManager ( legacy::PassManagerBase & MPM )

populateModulePassManager - This sets up the primary pass manager.

Definition at line 576 of file PassManagerBuilder.cpp.

◆ removeGlobalExtension()

void PassManagerBuilder::removeGlobalExtension ( PassManagerBuilder::GlobalExtensionID ExtensionID )

static

Removes an extension that was previously added using addGlobalExtension.

This is also intended to be used by plugins, to remove any extension that was previously registered before being unloaded.

Parameters

ExtensionID Identifier of the extension to be removed.

Definition at line 220 of file PassManagerBuilder.cpp.

References assert(), llvm::find_if(), and GlobalExtensions.

Referenced by llvm::RegisterStandardPasses::~RegisterStandardPasses().

Member Data Documentation

◆ CallGraphProfile

bool llvm::PassManagerBuilder::CallGraphProfile

Definition at line 156 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ DisableGVNLoadPRE

bool llvm::PassManagerBuilder::DisableGVNLoadPRE

Definition at line 162 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ DisableUnrollLoops

bool llvm::PassManagerBuilder::DisableUnrollLoops

Definition at line 155 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ DivergentTarget

bool llvm::PassManagerBuilder::DivergentTarget

Definition at line 167 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ ExportSummary

ModuleSummaryIndex* llvm::PassManagerBuilder::ExportSummary = nullptr

The module summary index to use for exporting information from the regular LTO phase, for example for the CFI and devirtualization type tests.

Definition at line 148 of file PassManagerBuilder.h.

◆ ForgetAllSCEVInLoopUnroll

bool llvm::PassManagerBuilder::ForgetAllSCEVInLoopUnroll

Definition at line 163 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ ImportSummary

const ModuleSummaryIndex* llvm::PassManagerBuilder::ImportSummary = nullptr

The module summary index to use for importing information to the thin LTO backends, for example for the CFI and devirtualization type tests.

Definition at line 153 of file PassManagerBuilder.h.

◆ Inliner

Pass* llvm::PassManagerBuilder::Inliner

Inliner - Specifies the inliner to use.

If this is non-null, it is added to the per-module passes.

Definition at line 143 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), populateModulePassManager(), and ~PassManagerBuilder().

◆ LibraryInfo

TargetLibraryInfoImpl* llvm::PassManagerBuilder::LibraryInfo

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.

Definition at line 139 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), populateFunctionPassManager(), populateModulePassManager(), and ~PassManagerBuilder().

◆ LicmMssaNoAccForPromotionCap

unsigned llvm::PassManagerBuilder::LicmMssaNoAccForPromotionCap

Definition at line 169 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), and populateModulePassManager().

◆ LicmMssaOptCap

unsigned llvm::PassManagerBuilder::LicmMssaOptCap

Definition at line 168 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), and populateModulePassManager().

◆ LoopsInterleaved

bool llvm::PassManagerBuilder::LoopsInterleaved

Definition at line 159 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ LoopVectorize

bool llvm::PassManagerBuilder::LoopVectorize

Definition at line 158 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ MergeFunctions

bool llvm::PassManagerBuilder::MergeFunctions

Definition at line 166 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), and populateModulePassManager().

◆ NewGVN

bool llvm::PassManagerBuilder::NewGVN

Definition at line 161 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ OptLevel

unsigned llvm::PassManagerBuilder::OptLevel

The Optimization Level - Specify the basic optimization level.

0 = -O0, 1 = -O1, 2 = -O2, 3 = -O3

Definition at line 130 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), populateFunctionPassManager(), and populateModulePassManager().

◆ RerollLoops

bool llvm::PassManagerBuilder::RerollLoops

Definition at line 160 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ SizeLevel

unsigned llvm::PassManagerBuilder::SizeLevel

SizeLevel - How much we're optimizing for size.

0 = none, 1 = -Os, 2 = -Oz

Definition at line 134 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder(), and populateModulePassManager().

◆ SLPVectorize

bool llvm::PassManagerBuilder::SLPVectorize

Definition at line 157 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ VerifyInput

bool llvm::PassManagerBuilder::VerifyInput

Definition at line 164 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

◆ VerifyOutput

bool llvm::PassManagerBuilder::VerifyOutput

Definition at line 165 of file PassManagerBuilder.h.

Referenced by PassManagerBuilder().

The documentation for this class was generated from the following files:

include/llvm/Transforms/IPO/PassManagerBuilder.h
lib/Transforms/IPO/PassManagerBuilder.cpp

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Member Typedef Documentation

◆ ExtensionFn

◆ GlobalExtensionID

Member Enumeration Documentation

◆ ExtensionPointTy

Constructor & Destructor Documentation

◆ PassManagerBuilder()

◆ ~PassManagerBuilder()

Member Function Documentation

◆ addExtension()

◆ addGlobalExtension()

◆ populateFunctionPassManager()

◆ populateModulePassManager()

◆ removeGlobalExtension()

Member Data Documentation

◆ CallGraphProfile

◆ DisableGVNLoadPRE

◆ DisableUnrollLoops

◆ DivergentTarget

◆ ExportSummary

◆ ForgetAllSCEVInLoopUnroll

◆ ImportSummary

◆ Inliner

◆ LibraryInfo

◆ LicmMssaNoAccForPromotionCap

◆ LicmMssaOptCap

◆ LoopsInterleaved

◆ LoopVectorize

◆ MergeFunctions

◆ NewGVN

◆ OptLevel

◆ RerollLoops

◆ SizeLevel

◆ SLPVectorize

◆ VerifyInput

◆ VerifyOutput