LowerTypeTests.cpp File Reference

#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/SetVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/TinyPtrVector.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Analysis/TypeMetadataUtils.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.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/Intrinsics.h"
#include "llvm/IR/LLVMContext.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/Type.h"
#include "llvm/IR/Use.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/Pass.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/TrailingObjects.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.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 <memory>
#include <set>
#include <string>
#include <system_error>
#include <utility>
#include <vector>

Go to the source code of this file.

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")
	INITIALIZE_PASS (LowerTypeTests, "lowertypetests", "Lower type metadata", false, false) ModulePass *llvm
static Value *	createMaskedBitTest (IRBuilder<> &B, Value *Bits, Value *BitOffset)
	Build a test that bit BitOffset mod sizeof(Bits)*8 is set in Bits. More...
static bool	isKnownTypeIdMember (Metadata *TypeId, const DataLayout &DL, Value *V, uint64_t COffset)
static bool	isThumbFunction (Function *F, Triple::ArchType ModuleArch)
static Triple::ArchType	selectJumpTableArmEncoding (ArrayRef< GlobalTypeMember *> Functions, Triple::ArchType ModuleArch)
static bool	isDirectCall (Use &U)

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 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 const unsigned	kX86JumpTableEntrySize = 8
static const unsigned	kARMJumpTableEntrySize = 4

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "lowertypetests"

Definition at line 87 of file LowerTypeTests.cpp.

Function Documentation

createMaskedBitTest()

static 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 519 of file LowerTypeTests.cpp.

References AvoidReuse, B, llvm::lowertypetests::BitSetInfo::Bits, llvm::lowertypetests::BitSetInfo::BitSize, llvm::GlobalAlias::create(), llvm::IRBuilder< T, Inserter >::CreateAnd(), llvm::IRBuilder< T, Inserter >::CreateGEP(), llvm::IRBuilder< T, Inserter >::CreateICmpNE(), llvm::IRBuilder< T, Inserter >::CreateLoad(), llvm::IRBuilder< T, Inserter >::CreateShl(), llvm::IRBuilder< T, Inserter >::CreateZExtOrTrunc(), GEP, llvm::ConstantInt::get(), llvm::ConstantDataArray::get(), llvm::ConstantExpr::getInBoundsGetElementPtr(), llvm::ConstantExpr::getIntToPtr(), llvm::ConstantExpr::getPtrToInt(), llvm::Value::getType(), I, llvm::TypeTestResolution::Inline, llvm::BitmaskEnumDetail::Mask(), and llvm::GlobalValue::PrivateLinkage.

INITIALIZE_PASS()

INITIALIZE_PASS	(	LowerTypeTests	,
		"lowertypetests"	,
		"Lower type metadata"	,
		false	,
		false
	)

Definition at line 484 of file LowerTypeTests.cpp.

References llvm::lowertypetests::BitSetBuilder::addOffset(), and llvm::lowertypetests::BitSetBuilder::build().

isDirectCall()

static bool isDirectCall ( Use &  U )

static

Definition at line 1638 of file LowerTypeTests.cpp.

References llvm::ModuleSummaryIndex::cfiFunctionDecls(), llvm::ModuleSummaryIndex::cfiFunctionDefs(), llvm::dyn_cast(), E, llvm::Module::getFunction(), llvm::Intrinsic::getName(), llvm::Value::getName(), llvm::Use::getUser(), llvm::Constant::handleOperandChange(), llvm::GlobalValue::hasLocalLinkage(), llvm::Intrinsic::icall_branch_funnel, llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::insert(), llvm::CallSiteBase< FunTy, BBTy, ValTy, UserTy, UseTy, InstrTy, CallTy, InvokeTy, IterTy >::isCallee(), llvm::GlobalValue::isDSOLocal(), llvm::ModuleSummaryIndex::partiallySplitLTOUnits(), llvm::SmallVectorTemplateBase< T >::push_back(), llvm::report_fatal_error(), llvm::Use::set(), llvm::Intrinsic::type_test, llvm::Value::use_begin(), llvm::Value::use_empty(), and llvm::Value::use_end().

isKnownTypeIdMember()

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

static

Definition at line 630 of file LowerTypeTests.cpp.

References llvm::PHINode::addIncoming(), llvm::lowertypetests::BitSetInfo::AlignLog2, llvm::TypeTestResolution::AlignLog2, llvm::alignTo(), llvm::TypeTestResolution::AllOnes, assert(), B, llvm::tgtok::Bit, llvm::TypeTestResolution::BitMask, llvm::lowertypetests::BitSetInfo::Bits, llvm::lowertypetests::BitSetInfo::BitSize, llvm::TypeTestResolution::ByteArray, llvm::lowertypetests::BitSetInfo::ByteOffset, C, llvm::GlobalAlias::create(), llvm::Function::Create(), llvm::BranchInst::Create(), llvm::IRBuilder< T, Inserter >::CreateICmpEQ(), llvm::IRBuilder< T, Inserter >::CreateICmpULE(), llvm::IRBuilder< T, Inserter >::CreateLShr(), llvm::IRBuilder< T, Inserter >::CreateOr(), llvm::IRBuilder< T, Inserter >::CreatePHI(), llvm::IRBuilder< T, Inserter >::CreatePtrToInt(), llvm::IRBuilder< T, Inserter >::CreateShl(), llvm::IRBuilder< T, Inserter >::CreateSub(), llvm::dbgs(), llvm::dyn_cast(), llvm::Triple::ELF, llvm::tgtok::Else, llvm::Instruction::eraseFromParent(), llvm::GlobalVariable::eraseFromParent(), llvm::GlobalValue::ExternalLinkage, F(), G, GEP, llvm::ConstantInt::get(), llvm::ConstantAggregateZero::get(), llvm::ArrayType::get(), llvm::ConstantAsMetadata::get(), llvm::MDNode::get(), llvm::GlobalValue::getAddressSpace(), llvm::PointerType::getAddressSpace(), llvm::ConstantStruct::getAnon(), llvm::CallBase::getArgOperand(), llvm::ConstantExpr::getBitCast(), llvm::ConstantInt::getFalse(), llvm::Function::getFunctionType(), llvm::ConstantExpr::getGetElementPtr(), llvm::GlobalVariable::getInitializer(), llvm::IRBuilderBase::GetInsertBlock(), llvm::ConstantExpr::getIntToPtr(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::GlobalValue::getLinkage(), llvm::Value::getName(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), llvm::MDNode::getNumOperands(), llvm::MDNode::getOperand(), llvm::Instruction::getParent(), llvm::DataLayout::getPointerSizeInBits(), llvm::ConstantExpr::getPtrToInt(), llvm::DataLayout::getStructLayout(), llvm::ConstantExpr::getSub(), llvm::ConstantInt::getTrue(), llvm::Value::getType(), llvm::GlobalValue::getType(), llvm::DataLayout::getTypeAllocSize(), llvm::GlobalValue::getValueType(), llvm::GlobalValue::getVisibility(), llvm::ConstantExpr::getZExt(), llvm::Value::hasOneUse(), llvm::GlobalObject::hasSection(), llvm::GlobalValue::HiddenVisibility, I, llvm::TypeTestResolution::Inline, llvm::TypeTestResolution::InlineBits, Int32Ty, llvm::lowertypetests::BitSetInfo::isAllOnes(), llvm::GlobalValue::isDeclarationForLinker(), llvm::GlobalValue::isDSOLocal(), llvm::GlobalValue::isThreadLocal(), llvm::GlobalValue::isWeakForLinker(), LLVM_DEBUG, llvm::LLVMContext::MD_absolute_symbol, llvm::LLVMContext::MD_prof, llvm::LLVMContext::MD_type, Name, llvm::NextPowerOf2(), P, llvm::BasicBlock::phis(), llvm::lowertypetests::BitSetInfo::print(), llvm::GlobalValue::PrivateLinkage, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::Value::replaceAllUsesWith(), llvm::ReplaceInstWithInst(), llvm::report_fatal_error(), llvm::MCID::Select, llvm::IRBuilderBase::SetInsertPoint(), llvm::GlobalValue::setLinkage(), llvm::Instruction::setMetadata(), llvm::Value::setName(), llvm::GlobalValue::setVisibility(), llvm::TypeTestResolution::Single, llvm::TypeTestResolution::SizeM1, llvm::TypeTestResolution::SizeM1BitWidth, llvm::BasicBlock::splitBasicBlock(), llvm::SplitBlockAndInsertIfThen(), llvm::Constant::stripPointerCasts(), llvm::Value::takeName(), llvm::TypeTestResolution::TheKind, llvm::TypeIdSummary::TTRes, llvm::TypeTestResolution::Unsat, llvm::Value::user_begin(), llvm::Value::uses(), Visibility, llvm::Triple::x86, and llvm::Triple::x86_64.

isThumbFunction()

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

static

Definition at line 1253 of file LowerTypeTests.cpp.

References Features, llvm::Function::getFnAttribute(), llvm::Attribute::getValueAsString(), llvm::Attribute::hasAttribute(), llvm::Attribute::None, llvm::StringRef::split(), and llvm::Triple::thumb.

Referenced by llvm::computeBlockSize(), llvm::LowerARMMachineInstrToMCInst(), and selectJumpTableArmEncoding().

selectJumpTableArmEncoding()

static Triple::ArchType selectJumpTableArmEncoding ( ArrayRef< GlobalTypeMember *>  Functions, Triple::ArchType  ModuleArch  )

static

Definition at line 1273 of file LowerTypeTests.cpp.

References llvm::Function::addFnAttr(), llvm::lowertypetests::GlobalLayoutBuilder::addFragment(), Arg, llvm::Triple::arm, assert(), ClReadSummary, ClSummaryAction, ClWriteSummary, llvm::GlobalAlias::create(), llvm::BasicBlock::Create(), llvm::Function::Create(), llvm::ArrayRef< T >::empty(), llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::errorCodeToError(), llvm::errorOrToExpected(), llvm::Export, llvm::GlobalValue::ExternalLinkage, F(), llvm::sys::fs::F_Text, llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::find(), llvm::InlineAsm::get(), llvm::ConstantInt::get(), llvm::FunctionType::get(), llvm::ArrayType::get(), llvm::ConstantAsMetadata::get(), llvm::ConstantPointerNull::get(), llvm::MDNode::get(), llvm::PointerType::getAddressSpace(), llvm::Triple::getArch(), llvm::ConstantExpr::getBitCast(), llvm::Function::getContext(), llvm::MemoryBuffer::getFile(), llvm::ConstantExpr::getInBoundsGetElementPtr(), llvm::GlobalValue::getLinkage(), llvm::Value::getName(), llvm::MDNode::getOperand(), llvm::ConstantExpr::getPointerCast(), llvm::Module::getTargetTriple(), llvm::Value::getType(), llvm::GlobalValue::getType(), llvm::GlobalValue::getValueType(), llvm::GlobalValue::getVisibility(), llvm::Type::getVoidTy(), llvm::Function::hasAddressTaken(), llvm::GlobalValue::hasLocalLinkage(), llvm::GlobalValue::HiddenVisibility, I, llvm::Import, llvm::tgtok::In, llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::insert(), isThumbFunction(), llvm::GlobalValue::isWeakForLinker(), llvm::ISD::JumpTable, llvm::Attribute::Naked, llvm::Attribute::NoUnwind, llvm::GlobalValue::PrivateLinkage, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::report_fatal_error(), llvm::SmallVectorImpl< T >::reserve(), llvm::GlobalObject::setAlignment(), llvm::GlobalObject::setMetadata(), llvm::Value::setName(), llvm::GlobalValue::setVisibility(), llvm::SmallVectorBase::size(), llvm::ArrayRef< T >::size(), llvm::raw_string_ostream::str(), llvm::Triple::thumb, and llvm::Triple::Win32.

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

STATISTIC() [5/5]

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

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))

static

Referenced by createMaskedBitTest().

ClReadSummary

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

static

Referenced by selectJumpTableArmEncoding().

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)

static

Referenced by selectJumpTableArmEncoding().

ClWriteSummary

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

static

Referenced by selectJumpTableArmEncoding().

kARMJumpTableEntrySize

const unsigned kARMJumpTableEntrySize = 4

static

Definition at line 1133 of file LowerTypeTests.cpp.

kX86JumpTableEntrySize

const unsigned kX86JumpTableEntrySize = 8

static

Definition at line 1132 of file LowerTypeTests.cpp.