#include "llvm/Transforms/IPO/LowerTypeTests.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/EquivalenceClasses.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/TinyPtrVector.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/TypeMetadataUtils.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalObject.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/IR/ModuleSummaryIndexYAML.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/ProfDataUtils.h"
#include "llvm/IR/ReplaceConstant.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Use.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TrailingObjects.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <set>
#include <string>
#include <system_error>
#include <utility>
#include <vector>

Macros
#define	DEBUG_TYPE "lowertypetests"

Functions
	STATISTIC (ByteArraySizeBits, "Byte array size in bits")
	STATISTIC (ByteArraySizeBytes, "Byte array size in bytes")
	STATISTIC (NumByteArraysCreated, "Number of byte arrays created")
	STATISTIC (NumTypeTestCallsLowered, "Number of type test calls lowered")
	STATISTIC (NumTypeIdDisjointSets, "Number of disjoint sets of type identifiers")
static BitSetInfo	buildBitSet (ArrayRef< uint64_t > Offsets)
	Build a bit set for list of offsets.
static Value *	createMaskedBitTest (IRBuilder<> &B, Value Bits, Value BitOffset)
	Build a test that bit BitOffset mod sizeof(Bits)*8 is set in Bits.
static bool	isKnownTypeIdMember (Metadata TypeId, const DataLayout &DL, Value V, uint64_t COffset)
static auto	buildBitSets (ArrayRef< Metadata * > TypeIds, const DenseMap< GlobalTypeMember *, uint64_t > &GlobalLayout)
static bool	isThumbFunction (Function *F, Triple::ArchType ModuleArch)
static SmallVector< DILocation * >	createJumpTableDebugInfo (Function F, ArrayRef< GlobalTypeMember > Functions)
static bool	isDirectCall (Use &U)
static void	dropTypeTests (Module &M, Function &TypeTestFunc, bool ShouldDropAll)
static bool	dropTypeTests (Module &M, bool ShouldDropAll)

Variables
static cl::opt< bool >	AvoidReuse ("lowertypetests-avoid-reuse", cl::desc("Try to avoid reuse of byte array addresses using aliases"), cl::Hidden, cl::init(true))
static cl::opt< PassSummaryAction >	ClSummaryAction ("lowertypetests-summary-action", cl::desc("What to do with the summary when running this pass"), cl::values(clEnumValN(PassSummaryAction::None, "none", "Do nothing"), clEnumValN(PassSummaryAction::Import, "import", "Import typeid resolutions from summary and globals"), clEnumValN(PassSummaryAction::Export, "export", "Export typeid resolutions to summary and globals")), cl::Hidden)
static cl::opt< std::string >	ClReadSummary ("lowertypetests-read-summary", cl::desc("Read summary from given textual assembly or YAML " "file before running pass"), cl::Hidden)
static cl::opt< std::string >	ClWriteSummary ("lowertypetests-write-summary", cl::desc("Write summary to given YAML file after running pass"), cl::Hidden)
static cl::opt< bool >	EnableJumpTableDebugInfo ("lowertypetests-jump-table-debug-info", cl::init(true), cl::Hidden, cl::desc("Enable debug info generation for jump tables"))
static const unsigned	kX86JumpTableEntrySize = 8
static const unsigned	kX86IBTJumpTableEntrySize = 16
static const unsigned	kARMJumpTableEntrySize = 4
static const unsigned	kARMBTIJumpTableEntrySize = 8
static const unsigned	kARMv6MJumpTableEntrySize = 16
static const unsigned	kRISCVJumpTableEntrySize = 8
static const unsigned	kLOONGARCH64JumpTableEntrySize = 8
static const unsigned	kHexagonJumpTableEntrySize = 4

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "lowertypetests"

Definition at line 96 of file LowerTypeTests.cpp.

Function Documentation

◆ buildBitSet()

BitSetInfo buildBitSet ( ArrayRef< uint64_t > Offsets )

static

Build a bit set for list of offsets.

Definition at line 609 of file LowerTypeTests.cpp.

References llvm::lowertypetests::BitSetBuilder::build().

Referenced by buildBitSets().

◆ buildBitSets()

auto buildBitSets	(	ArrayRef< Metadata * >	TypeIds,
		const DenseMap< GlobalTypeMember *, uint64_t > &	GlobalLayout )

static

Definition at line 1194 of file LowerTypeTests.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::back(), buildBitSet(), llvm::cast(), llvm::dbgs(), llvm::dyn_cast(), llvm::SmallVectorImpl< T >::emplace_back(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), LLVM_DEBUG, llvm::Offset, llvm::SmallVectorImpl< T >::reserve(), llvm::ArrayRef< T >::size(), and uint64_t.

◆ createJumpTableDebugInfo()

SmallVector< DILocation * > createJumpTableDebugInfo	(	Function *	F,
		ArrayRef< GlobalTypeMember * >	Functions )

static

Definition at line 1588 of file LowerTypeTests.cpp.

References llvm::StringRef::consume_back(), llvm::DIBuilder::createCompileUnit(), llvm::DIBuilder::createFile(), llvm::DIBuilder::createFunction(), llvm::DIBuilder::createSubroutineType(), F, llvm::DIBuilder::finalize(), llvm::MDNode::get(), llvm::DICompileUnit::LineTablesOnly, and llvm::SmallVectorImpl< T >::reserve().

◆ createMaskedBitTest()

Value * createMaskedBitTest	(	IRBuilder<> &	B,
		Value *	Bits,
		Value *	BitOffset )

static

Build a test that bit BitOffset mod sizeof(Bits)*8 is set in Bits.

This pattern matches to the bt instruction on x86.

Definition at line 617 of file LowerTypeTests.cpp.

References B(), llvm::BitWidth, and llvm::cast().

◆ dropTypeTests() [1/2]

bool dropTypeTests	(	Module &	M,
		bool	ShouldDropAll )

static

Definition at line 2152 of file LowerTypeTests.cpp.

References dropTypeTests(), llvm::GlobalObject::eraseMetadata(), and llvm::Intrinsic::getDeclarationIfExists().

◆ dropTypeTests() [2/2]

void dropTypeTests	(	Module &	M,
		Function &	TypeTestFunc,
		bool	ShouldDropAll )

static

Definition at line 2128 of file LowerTypeTests.cpp.

References llvm::all_of(), assert(), llvm::lowertypetests::Assume, llvm::cast(), llvm::dyn_cast(), llvm::Instruction::eraseFromParent(), llvm::ConstantInt::getTrue(), llvm::make_early_inc_range(), llvm::Value::replaceAllUsesWith(), llvm::Value::use_empty(), llvm::Value::users(), and llvm::Value::uses().

Referenced by dropTypeTests(), and llvm::DropTypeTestsPass::run().

◆ isDirectCall()

bool isDirectCall ( Use & U )

static

Definition at line 2083 of file LowerTypeTests.cpp.

References llvm::dyn_cast().

◆ isKnownTypeIdMember()

bool isKnownTypeIdMember	(	Metadata *	TypeId,
		const DataLayout &	DL,
		Value *	V,
		uint64_t	COffset )

static

Definition at line 725 of file LowerTypeTests.cpp.

References llvm::cast(), DL, llvm::dyn_cast(), GEP, llvm::APInt::getZExtValue(), isKnownTypeIdMember(), llvm::Offset, and uint64_t.

Referenced by isKnownTypeIdMember(), and llvm::SimplifyTypeTestsPass::run().

◆ isThumbFunction()

bool isThumbFunction	(	Function *	F,
		Triple::ArchType	ModuleArch )

static

Definition at line 1536 of file LowerTypeTests.cpp.

References F, llvm::Attribute::getValueAsString(), llvm::Attribute::isValid(), llvm::StringRef::split(), and llvm::Triple::thumb.

◆ STATISTIC() [1/5]

STATISTIC	(	ByteArraySizeBits	,
		"Byte array size in bits"	)

◆ STATISTIC() [2/5]

STATISTIC	(	ByteArraySizeBytes	,
		"Byte array size in bytes"	)

◆ STATISTIC() [3/5]

STATISTIC	(	NumByteArraysCreated	,
		"Number of byte arrays created"	)

◆ STATISTIC() [4/5]

STATISTIC	(	NumTypeIdDisjointSets	,
		"Number of disjoint sets of type identifiers"	)

◆ STATISTIC() [5/5]

STATISTIC	(	NumTypeTestCallsLowered	,
		"Number of type test calls lowered"	)

Variable Documentation

◆ AvoidReuse

cl::opt< bool > AvoidReuse("lowertypetests-avoid-reuse", cl::desc("Try to avoid reuse of byte array addresses using aliases"), cl::Hidden, cl::init(true))	(	"lowertypetests-avoid-reuse"	,
		cl::desc("Try to avoid reuse of byte array addresses using aliases")	,
		cl::Hidden	,
		cl::init(true)	)

static

◆ ClReadSummary

cl::opt< std::string > ClReadSummary("lowertypetests-read-summary", cl::desc("Read summary from given textual assembly or YAML " "file before running pass"), cl::Hidden)	(	"lowertypetests-read-summary"	,
		cl::desc("Read summary from given textual assembly or YAML " "file before running pass")	,
		cl::Hidden	)

static

◆ ClSummaryAction

cl::opt< PassSummaryAction > ClSummaryAction("lowertypetests-summary-action", cl::desc("What to do with the summary when running this pass"), cl::values(clEnumValN(PassSummaryAction::None, "none", "Do nothing"), clEnumValN(PassSummaryAction::Import, "import", "Import typeid resolutions from summary and globals"), clEnumValN(PassSummaryAction::Export, "export", "Export typeid resolutions to summary and globals")), cl::Hidden)	(	"lowertypetests-summary-action"	,
		cl::desc("What to do with the summary when running this pass")	,
		cl::values(clEnumValN(PassSummaryAction::None, "none", "Do nothing"), clEnumValN(PassSummaryAction::Import, "import", "Import typeid resolutions from summary and globals"), clEnumValN(PassSummaryAction::Export, "export", "Export typeid resolutions to summary and globals"))	,
		cl::Hidden	)

static

Referenced by checkCombinedSummaryForTesting().

◆ ClWriteSummary

cl::opt< std::string > ClWriteSummary("lowertypetests-write-summary", cl::desc("Write summary to given YAML file after running pass"), cl::Hidden)	(	"lowertypetests-write-summary"	,
		cl::desc("Write summary to given YAML file after running pass")	,
		cl::Hidden	)

static

◆ EnableJumpTableDebugInfo

cl::opt< bool > EnableJumpTableDebugInfo("lowertypetests-jump-table-debug-info", cl::init(true), cl::Hidden, cl::desc("Enable debug info generation for jump tables"))	(	"lowertypetests-jump-table-debug-info"	,
		cl::init(true)	,
		cl::Hidden	,
		cl::desc("Enable debug info generation for jump tables")	)

static

◆ kARMBTIJumpTableEntrySize

const unsigned kARMBTIJumpTableEntrySize = 8

static

Definition at line 1309 of file LowerTypeTests.cpp.

◆ kARMJumpTableEntrySize

const unsigned kARMJumpTableEntrySize = 4

static

Definition at line 1308 of file LowerTypeTests.cpp.

◆ kARMv6MJumpTableEntrySize

const unsigned kARMv6MJumpTableEntrySize = 16

static

Definition at line 1310 of file LowerTypeTests.cpp.

◆ kHexagonJumpTableEntrySize

const unsigned kHexagonJumpTableEntrySize = 4

static

Definition at line 1313 of file LowerTypeTests.cpp.

◆ kLOONGARCH64JumpTableEntrySize

const unsigned kLOONGARCH64JumpTableEntrySize = 8

static

Definition at line 1312 of file LowerTypeTests.cpp.

◆ kRISCVJumpTableEntrySize

const unsigned kRISCVJumpTableEntrySize = 8

static

Definition at line 1311 of file LowerTypeTests.cpp.

◆ kX86IBTJumpTableEntrySize

const unsigned kX86IBTJumpTableEntrySize = 16

static

Definition at line 1307 of file LowerTypeTests.cpp.

◆ kX86JumpTableEntrySize

const unsigned kX86JumpTableEntrySize = 8

static

Definition at line 1306 of file LowerTypeTests.cpp.

Macros

Functions

Variables

Macro Definition Documentation

◆ DEBUG_TYPE

Function Documentation

◆ buildBitSet()

◆ buildBitSets()

◆ createJumpTableDebugInfo()

◆ createMaskedBitTest()

◆ dropTypeTests() [1/2]

◆ dropTypeTests() [2/2]

◆ isDirectCall()

◆ isKnownTypeIdMember()

◆ isThumbFunction()

◆ STATISTIC() [1/5]

◆ STATISTIC() [2/5]

◆ STATISTIC() [3/5]

◆ STATISTIC() [4/5]

◆ STATISTIC() [5/5]

Variable Documentation

◆ AvoidReuse

◆ ClReadSummary

◆ ClSummaryAction

◆ ClWriteSummary

◆ EnableJumpTableDebugInfo

◆ kARMBTIJumpTableEntrySize

◆ kARMJumpTableEntrySize

◆ kARMv6MJumpTableEntrySize

◆ kHexagonJumpTableEntrySize

◆ kLOONGARCH64JumpTableEntrySize

◆ kRISCVJumpTableEntrySize

◆ kX86IBTJumpTableEntrySize

◆ kX86JumpTableEntrySize