llvm::SelectionDAGBuilder Class Reference

SelectionDAGBuilder - This is the common target-independent lowering implementation that is parameterized by a TargetLowering object. More...

#include "CodeGen/SelectionDAG/SelectionDAGBuilder.h"

Collaboration diagram for llvm::SelectionDAGBuilder:

Classes
class	SDAGSwitchLowering
struct	StatepointLoweringInfo
	Describes a gc.statepoint or a gc.statepoint like thing for the purposes of lowering into a STATEPOINT node. More...

Public Member Functions
	SelectionDAGBuilder (SelectionDAG &dag, FunctionLoweringInfo &funcinfo, SwiftErrorValueTracking &swifterror, CodeGenOpt::Level ol)
void	init (GCFunctionInfo *gfi, AAResults *AA, AssumptionCache *AC, const TargetLibraryInfo *li)
void	clear ()
	Clear out the current SelectionDAG and the associated state and prepare this SelectionDAGBuilder object to be used for a new block.
void	clearDanglingDebugInfo ()
	Clear the dangling debug information map.
SDValue	getMemoryRoot ()
	Return the current virtual root of the Selection DAG, flushing any PendingLoad items.
SDValue	getRoot ()
	Similar to getMemoryRoot, but also flushes PendingConstrainedFP(Strict) items.
SDValue	getControlRoot ()
	Similar to getRoot, but instead of flushing all the PendingLoad items, flush all the PendingExports (and PendingConstrainedFPStrict) items.
SDLoc	getCurSDLoc () const
DebugLoc	getCurDebugLoc () const
void	CopyValueToVirtualRegister (const Value *V, unsigned Reg, ISD::NodeType ExtendType=ISD::ANY_EXTEND)
void	visit (const Instruction &I)
void	visit (unsigned Opcode, const User &I)
SDValue	getCopyFromRegs (const Value *V, Type *Ty)
	If there was virtual register allocated for the value V emit CopyFromReg of the specified type Ty.
void	addDanglingDebugInfo (const DbgValueInst *DI, unsigned Order)
	Register a dbg_value which relies on a Value which we have not yet seen.
void	addDanglingDebugInfo (const VarLocInfo *VarLoc, unsigned Order)
void	dropDanglingDebugInfo (const DILocalVariable *Variable, const DIExpression *Expr)
	If we have dangling debug info that describes Variable, or an overlapping part of variable considering the Expr, then this method will drop that debug info as it isn't valid any longer.
void	resolveDanglingDebugInfo (const Value *V, SDValue Val)
	If we saw an earlier dbg_value referring to V, generate the debug data structures now that we've seen its definition.
void	salvageUnresolvedDbgValue (DanglingDebugInfo &DDI)
	For the given dangling debuginfo record, perform last-ditch efforts to resolve the debuginfo to something that is represented in this DAG.
bool	handleDebugValue (ArrayRef< const Value * > Values, DILocalVariable *Var, DIExpression *Expr, DebugLoc DbgLoc, unsigned Order, bool IsVariadic)
	For a given list of Values, attempt to create and record a SDDbgValue in the SelectionDAG.
void	resolveOrClearDbgInfo ()
	Evict any dangling debug information, attempting to salvage it first.
SDValue	getValue (const Value *V)
	getValue - Return an SDValue for the given Value.
SDValue	getNonRegisterValue (const Value *V)
	getNonRegisterValue - Return an SDValue for the given Value, but don't look in FuncInfo.ValueMap for a virtual register.
SDValue	getValueImpl (const Value *V)
	getValueImpl - Helper function for getValue and getNonRegisterValue.
void	setValue (const Value *V, SDValue NewN)
void	setUnusedArgValue (const Value *V, SDValue NewN)
void	FindMergedConditions (const Value *Cond, MachineBasicBlock *TBB, MachineBasicBlock *FBB, MachineBasicBlock *CurBB, MachineBasicBlock *SwitchBB, Instruction::BinaryOps Opc, BranchProbability TProb, BranchProbability FProb, bool InvertCond)
void	EmitBranchForMergedCondition (const Value *Cond, MachineBasicBlock *TBB, MachineBasicBlock *FBB, MachineBasicBlock *CurBB, MachineBasicBlock *SwitchBB, BranchProbability TProb, BranchProbability FProb, bool InvertCond)
	EmitBranchForMergedCondition - Helper method for FindMergedConditions.
bool	ShouldEmitAsBranches (const std::vector< SwitchCG::CaseBlock > &Cases)
	If the set of cases should be emitted as a series of branches, return true.
bool	isExportableFromCurrentBlock (const Value *V, const BasicBlock *FromBB)
void	CopyToExportRegsIfNeeded (const Value *V)
	CopyToExportRegsIfNeeded - If the given value has virtual registers created for it, emit nodes to copy the value into the virtual registers.
void	ExportFromCurrentBlock (const Value *V)
	ExportFromCurrentBlock - If this condition isn't known to be exported from the current basic block, add it to ValueMap now so that we'll get a CopyTo/FromReg.
void	LowerCallTo (const CallBase &CB, SDValue Callee, bool IsTailCall, bool IsMustTailCall, const BasicBlock *EHPadBB=nullptr)
SDValue	lowerRangeToAssertZExt (SelectionDAG &DAG, const Instruction &I, SDValue Op)
void	populateCallLoweringInfo (TargetLowering::CallLoweringInfo &CLI, const CallBase *Call, unsigned ArgIdx, unsigned NumArgs, SDValue Callee, Type *ReturnTy, bool IsPatchPoint)
	Populate a CallLowerinInfo (into CLI) based on the properties of the call being lowered.
std::pair< SDValue, SDValue >	lowerInvokable (TargetLowering::CallLoweringInfo &CLI, const BasicBlock *EHPadBB=nullptr)
void	UpdateSplitBlock (MachineBasicBlock *First, MachineBasicBlock *Last)
	When an MBB was split during scheduling, update the references that need to refer to the last resulting block.
SDValue	LowerAsSTATEPOINT (StatepointLoweringInfo &SI)
	Lower SLI into a STATEPOINT instruction.
void	LowerStatepoint (const GCStatepointInst &I, const BasicBlock *EHPadBB=nullptr)
void	LowerCallSiteWithDeoptBundle (const CallBase *Call, SDValue Callee, const BasicBlock *EHPadBB)
void	LowerDeoptimizeCall (const CallInst *CI)
void	LowerDeoptimizingReturn ()
void	LowerCallSiteWithDeoptBundleImpl (const CallBase *Call, SDValue Callee, const BasicBlock *EHPadBB, bool VarArgDisallowed, bool ForceVoidReturnTy)
MVT	getFrameIndexTy ()
	Returns the type of FrameIndex and TargetFrameIndex nodes.
void	visitSwitchCase (SwitchCG::CaseBlock &CB, MachineBasicBlock *SwitchBB)
	visitSwitchCase - Emits the necessary code to represent a single node in the binary search tree resulting from lowering a switch instruction.
void	visitSPDescriptorParent (StackProtectorDescriptor &SPD, MachineBasicBlock *ParentBB)
	Codegen a new tail for a stack protector check ParentMBB which has had its tail spliced into a stack protector check success bb.
void	visitSPDescriptorFailure (StackProtectorDescriptor &SPD)
	Codegen the failure basic block for a stack protector check.
void	visitBitTestHeader (SwitchCG::BitTestBlock &B, MachineBasicBlock *SwitchBB)
	visitBitTestHeader - This function emits necessary code to produce value suitable for "bit tests"
void	visitBitTestCase (SwitchCG::BitTestBlock &BB, MachineBasicBlock *NextMBB, BranchProbability BranchProbToNext, unsigned Reg, SwitchCG::BitTestCase &B, MachineBasicBlock *SwitchBB)
	visitBitTestCase - this function produces one "bit test"
void	visitJumpTable (SwitchCG::JumpTable &JT)
	visitJumpTable - Emit JumpTable node in the current MBB
void	visitJumpTableHeader (SwitchCG::JumpTable &JT, SwitchCG::JumpTableHeader &JTH, MachineBasicBlock *SwitchBB)
	visitJumpTableHeader - This function emits necessary code to produce index in the JumpTable from switch case.

Public Attributes
SmallVector< SDValue, 8 >	PendingLoads
	Loads are not emitted to the program immediately.
StatepointLoweringState	StatepointLowering
	State used while lowering a statepoint sequence (gc_statepoint, gc_relocate, and gc_result).
SelectionDAG &	DAG
AAResults *	AA = nullptr
AssumptionCache *	AC = nullptr
const TargetLibraryInfo *	LibInfo
std::unique_ptr< SDAGSwitchLowering >	SL
StackProtectorDescriptor	SPDescriptor
	A StackProtectorDescriptor structure used to communicate stack protector information in between SelectBasicBlock and FinishBasicBlock.
DenseMap< const Constant *, unsigned >	ConstantsOut
FunctionLoweringInfo &	FuncInfo
	Information about the function as a whole.
SwiftErrorValueTracking &	SwiftError
	Information about the swifterror values used throughout the function.
GCFunctionInfo *	GFI
	Garbage collection metadata for the function.
DenseMap< MachineBasicBlock *, SmallVector< unsigned, 4 > >	LPadToCallSiteMap
	Map a landing pad to the call site indexes.
bool	HasTailCall = false
	This is set to true if a call in the current block has been translated as a tail call.
LLVMContext *	Context

Static Public Attributes
static const unsigned	LowestSDNodeOrder = 1
	Lowest valid SDNodeOrder.

Detailed Description

SelectionDAGBuilder - This is the common target-independent lowering implementation that is parameterized by a TargetLowering object.

Definition at line 97 of file SelectionDAGBuilder.h.

Constructor & Destructor Documentation

SelectionDAGBuilder()

llvm::SelectionDAGBuilder::SelectionDAGBuilder ( SelectionDAG &  dag, FunctionLoweringInfo &  funcinfo, SwiftErrorValueTracking &  swifterror, CodeGenOpt::Level  ol  )

inline

Definition at line 293 of file SelectionDAGBuilder.h.

References TM.

Member Function Documentation

addDanglingDebugInfo() [1/2]

void SelectionDAGBuilder::addDanglingDebugInfo	(	const DbgValueInst *	DI,
		unsigned	Order
	)

Register a dbg_value which relies on a Value which we have not yet seen.

Definition at line 1213 of file SelectionDAGBuilder.cpp.

References llvm::SelectionDAG::AddDbgValue(), assert(), DAG, llvm::SDDbgOperand::fromConst(), llvm::UndefValue::get(), llvm::SelectionDAG::getDbgValueList(), llvm::Instruction::getDebugLoc(), llvm::DbgVariableIntrinsic::getExpression(), llvm::DbgVariableIntrinsic::getNumVariableLocationOps(), llvm::DbgValueInst::getValue(), llvm::DbgValueInst::getValues(), llvm::DbgVariableIntrinsic::getVariable(), llvm::DbgVariableIntrinsic::hasArgList(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by visit().

addDanglingDebugInfo() [2/2]

void SelectionDAGBuilder::addDanglingDebugInfo	(	const VarLocInfo *	VarLoc,
		unsigned	Order
	)

Definition at line 1208 of file SelectionDAGBuilder.cpp.

References llvm::VarLocInfo::V.

clear()

void SelectionDAGBuilder::clear

(

)

Clear out the current SelectionDAG and the associated state and prepare this SelectionDAGBuilder object to be used for a new block.

This doesn't clear out information about additional blocks that are needed to complete switch lowering or PHI node updating; that information is cleared out as it is consumed.

Definition at line 1055 of file SelectionDAGBuilder.cpp.

References llvm::StatepointLoweringState::clear(), HasTailCall, LowestSDNodeOrder, PendingLoads, and StatepointLowering.

clearDanglingDebugInfo()

void SelectionDAGBuilder::clearDanglingDebugInfo

(

)

Clear the dangling debug information map.

This function is separated from the clear so that debug information that is dangling in a basic block can be properly resolved in a different basic block. This allows the SelectionDAG to resolve dangling debug information attached to PHI nodes.

Definition at line 1068 of file SelectionDAGBuilder.cpp.

Referenced by resolveOrClearDbgInfo().

CopyToExportRegsIfNeeded()

void SelectionDAGBuilder::CopyToExportRegsIfNeeded

(

const Value *

V

)

CopyToExportRegsIfNeeded - If the given value has virtual registers created for it, emit nodes to copy the value into the virtual registers.

Definition at line 2119 of file SelectionDAGBuilder.cpp.

References assert(), CopyValueToVirtualRegister(), FuncInfo, llvm::Value::getType(), llvm::Type::isEmptyTy(), llvm::Value::use_empty(), and llvm::FunctionLoweringInfo::ValueMap.

Referenced by visit().

CopyValueToVirtualRegister()

void SelectionDAGBuilder::CopyValueToVirtualRegister	(	const Value *	V,
		unsigned	Reg,
		ISD::NodeType	ExtendType = ISD::ANY_EXTEND
	)

Definition at line 10294 of file SelectionDAGBuilder.cpp.

References llvm::ISD::ANY_EXTEND, assert(), llvm::ISD::CopyFromReg, DAG, FuncInfo, llvm::Value::getContext(), llvm::RegsForValue::getCopyToRegs(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getEntryNode(), getNonRegisterValue(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::Value::getType(), llvm::Register::isPhysicalRegister(), and llvm::FunctionLoweringInfo::PreferredExtendType.

Referenced by CopyToExportRegsIfNeeded(), and ExportFromCurrentBlock().

dropDanglingDebugInfo()

void SelectionDAGBuilder::dropDanglingDebugInfo	(	const DILocalVariable *	Variable,
		const DIExpression *	Expr
	)

If we have dangling debug info that describes Variable, or an overlapping part of variable considering the Expr, then this method will drop that debug info as it isn't valid any longer.

Definition at line 1240 of file SelectionDAGBuilder.cpp.

References DAG, llvm::dbgs(), llvm::erase_if(), llvm::DIExpression::fragmentsOverlap(), llvm::SelectionDAG::getFunctionVarLocs(), LLVM_DEBUG, and salvageUnresolvedDbgValue().

Referenced by visit().

EmitBranchForMergedCondition()

void SelectionDAGBuilder::EmitBranchForMergedCondition	(	const Value *	Cond,
		MachineBasicBlock *	TBB,
		MachineBasicBlock *	FBB,
		MachineBasicBlock *	CurBB,
		MachineBasicBlock *	SwitchBB,
		BranchProbability	TProb,
		BranchProbability	FProb,
		bool	InvertCond
	)

EmitBranchForMergedCondition - Helper method for FindMergedConditions.

This function emits a branch and is used at the leaves of an OR or an AND operator tree.

Definition at line 2210 of file SelectionDAGBuilder.cpp.

References Cond, DAG, llvm::MachineBasicBlock::getBasicBlock(), llvm::SelectionDAG::getContext(), getCurSDLoc(), llvm::getFCmpCodeWithoutNaN(), llvm::getFCmpCondCode(), llvm::getICmpCondCode(), llvm::ConstantInt::getTrue(), isExportableFromCurrentBlock(), llvm::TargetOptions::NoNaNsFPMath, llvm::TargetMachine::Options, llvm::ISD::SETEQ, llvm::ISD::SETNE, SL, and TBB.

Referenced by FindMergedConditions().

ExportFromCurrentBlock()

void SelectionDAGBuilder::ExportFromCurrentBlock

(

const Value *

V

)

ExportFromCurrentBlock - If this condition isn't known to be exported from the current basic block, add it to ValueMap now so that we'll get a CopyTo/FromReg.

Definition at line 2134 of file SelectionDAGBuilder.cpp.

References CopyValueToVirtualRegister(), FuncInfo, llvm::FunctionLoweringInfo::InitializeRegForValue(), and llvm::FunctionLoweringInfo::isExportedInst().

Referenced by LowerAsSTATEPOINT().

FindMergedConditions()

void SelectionDAGBuilder::FindMergedConditions	(	const Value *	Cond,
		MachineBasicBlock *	TBB,
		MachineBasicBlock *	FBB,
		MachineBasicBlock *	CurBB,
		MachineBasicBlock *	SwitchBB,
		Instruction::BinaryOps	Opc,
		BranchProbability	TProb,
		BranchProbability	FProb,
		bool	InvertCond
	)

Definition at line 2257 of file SelectionDAGBuilder.cpp.

References assert(), Cond, llvm::MachineFunction::CreateMachineBasicBlock(), DAG, EmitBranchForMergedCondition(), FindMergedConditions(), llvm::MachineBasicBlock::getBasicBlock(), llvm::SelectionDAG::getMachineFunction(), llvm::MachineBasicBlock::getParent(), llvm::Instruction::getParent(), llvm::Value::hasOneUse(), InBlock(), llvm::MachineFunction::insert(), llvm::PatternMatch::m_LogicalAnd(), llvm::PatternMatch::m_LogicalOr(), llvm::PatternMatch::m_Not(), llvm::PatternMatch::m_OneUse(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), llvm::BranchProbability::normalizeProbabilities(), and TBB.

Referenced by FindMergedConditions().

getControlRoot()

SDValue SelectionDAGBuilder::getControlRoot

(

)

Similar to getRoot, but instead of flushing all the PendingLoad items, flush all the PendingExports (and PendingConstrainedFPStrict) items.

It is necessary to do this before emitting a terminator instruction.

Definition at line 1123 of file SelectionDAGBuilder.cpp.

Referenced by LowerAsSTATEPOINT(), lowerInvokable(), visitBitTestCase(), visitBitTestHeader(), visitJumpTable(), visitJumpTableHeader(), and visitSwitchCase().

getCopyFromRegs()

SDValue SelectionDAGBuilder::getCopyFromRegs	(	const Value *	V,
		Type *	Ty
	)

If there was virtual register allocated for the value V emit CopyFromReg of the specified type Ty.

getCopyFromRegs - If there was virtual register allocated for the value V emit CopyFromReg of the specified type Ty.

Return empty SDValue() otherwise.

Definition at line 1527 of file SelectionDAGBuilder.cpp.

References DAG, FuncInfo, llvm::SelectionDAG::getContext(), llvm::RegsForValue::getCopyFromRegs(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getEntryNode(), llvm::SelectionDAG::getTargetLoweringInfo(), resolveDanglingDebugInfo(), and llvm::FunctionLoweringInfo::ValueMap.

Referenced by getValue().

getCurDebugLoc()

DebugLoc llvm::SelectionDAGBuilder::getCurDebugLoc ( ) const

inline

Definition at line 335 of file SelectionDAGBuilder.h.

References llvm::Instruction::getDebugLoc().

getCurSDLoc()

SDLoc llvm::SelectionDAGBuilder::getCurSDLoc ( ) const

inline

Definition at line 331 of file SelectionDAGBuilder.h.

Referenced by CopyValueToVirtualRegister(), EmitBranchForMergedCondition(), getCopyFromRegs(), getUniformBase(), getValueImpl(), LowerAsSTATEPOINT(), LowerCallTo(), LowerDeoptimizingReturn(), lowerRangeToAssertZExt(), LowerStatepoint(), populateCallLoweringInfo(), visitBitTestCase(), visitBitTestHeader(), visitJumpTable(), visitJumpTableHeader(), visitSPDescriptorFailure(), visitSPDescriptorParent(), and visitSwitchCase().

getFrameIndexTy()

MVT llvm::SelectionDAGBuilder::getFrameIndexTy ( )

inline

Returns the type of FrameIndex and TargetFrameIndex nodes.

Definition at line 495 of file SelectionDAGBuilder.h.

References DAG, llvm::SelectionDAG::getDataLayout(), llvm::TargetLoweringBase::getFrameIndexTy(), and llvm::SelectionDAG::getTargetLoweringInfo().

getMemoryRoot()

SDValue SelectionDAGBuilder::getMemoryRoot

(

)

Return the current virtual root of the Selection DAG, flushing any PendingLoad items.

This must be done before emitting a store or any other memory node that may need to be ordered after any prior load instructions.

Definition at line 1103 of file SelectionDAGBuilder.cpp.

References PendingLoads.

Referenced by getRoot().

getNonRegisterValue()

SDValue SelectionDAGBuilder::getNonRegisterValue

(

const Value *

V

)

getNonRegisterValue - Return an SDValue for the given Value, but don't look in FuncInfo.ValueMap for a virtual register.

Definition at line 1568 of file SelectionDAGBuilder.cpp.

References getValueImpl(), N, and resolveDanglingDebugInfo().

Referenced by CopyValueToVirtualRegister().

getRoot()

SDValue SelectionDAGBuilder::getRoot

(

)

Similar to getMemoryRoot, but also flushes PendingConstrainedFP(Strict) items.

This must be done before emitting any call other any other node that may need to be ordered after FP instructions due to other side effects.

Definition at line 1107 of file SelectionDAGBuilder.cpp.

References getMemoryRoot(), and PendingLoads.

Referenced by LowerAsSTATEPOINT(), LowerCallTo(), lowerInvokable(), and populateCallLoweringInfo().

getValue()

SDValue SelectionDAGBuilder::getValue

(

const Value *

V

)

getValue - Return an SDValue for the given Value.

Definition at line 1547 of file SelectionDAGBuilder.cpp.

References getCopyFromRegs(), llvm::Value::getType(), getValueImpl(), N, and resolveDanglingDebugInfo().

Referenced by getUniformBase(), getValueImpl(), LowerAsSTATEPOINT(), LowerCallTo(), LowerStatepoint(), populateCallLoweringInfo(), visitBitTestHeader(), visitJumpTableHeader(), visitSPDescriptorParent(), and visitSwitchCase().

getValueImpl()

SDValue SelectionDAGBuilder::getValueImpl

(

const Value *

V

)

getValueImpl - Helper function for getValue and getNonRegisterValue.

Create an SDValue for the given value.

Definition at line 1591 of file SelectionDAGBuilder.cpp.

References assert(), llvm::CallingConv::C, llvm::ComputeValueVTs(), DAG, FuncInfo, llvm::SelectionDAG::getBasicBlock(), llvm::SelectionDAG::getBlockAddress(), llvm::SelectionDAG::getBuildVector(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getConstantFP(), llvm::SelectionDAG::getContext(), llvm::RegsForValue::getCopyFromRegs(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::VectorType::getElementType(), llvm::SelectionDAG::getEntryNode(), llvm::SelectionDAG::getFrameIndex(), llvm::SelectionDAG::getGlobalAddress(), llvm::SelectionDAG::getMDNode(), llvm::SelectionDAG::getMergeValues(), llvm::SDValue::getNode(), llvm::SDNode::getNumValues(), llvm::Type::getPointerAddressSpace(), llvm::TargetLoweringBase::getPointerTy(), llvm::EVT::getSizeInBits(), llvm::SelectionDAG::getSplat(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::Value::getType(), llvm::SelectionDAG::getUNDEF(), getValue(), llvm::TargetLoweringBase::getValueType(), llvm::SelectionDAG::getVScale(), llvm::FunctionLoweringInfo::InitializeRegForValue(), llvm::Type::isAggregateType(), llvm::EVT::isFloatingPoint(), llvm_unreachable, llvm::PatternMatch::m_VScale(), llvm::PatternMatch::match(), llvm::FunctionLoweringInfo::MBBMap, NC, llvm::SmallVectorTemplateBase< T, bool >::push_back(), SI, llvm::SmallVectorBase< Size_T >::size(), llvm::FunctionLoweringInfo::StaticAllocaMap, and visit().

Referenced by getNonRegisterValue(), and getValue().

handleDebugValue()

bool SelectionDAGBuilder::handleDebugValue	(	ArrayRef< const Value * >	Values,
		DILocalVariable *	Var,
		DIExpression *	Expr,
		DebugLoc	DbgLoc,
		unsigned	Order,
		bool	IsVariadic
	)

For a given list of Values, attempt to create and record a SDDbgValue in the SelectionDAG.

Definition at line 1385 of file SelectionDAGBuilder.cpp.

References llvm::SelectionDAG::AddDbgValue(), assert(), llvm::DIExpression::createFragmentExpression(), DAG, llvm::SmallVectorImpl< T >::emplace_back(), llvm::ArrayRef< T >::empty(), llvm::SmallVectorBase< Size_T >::empty(), llvm::SDDbgOperand::fromConst(), llvm::SDDbgOperand::fromFrameIdx(), llvm::SDDbgOperand::fromNode(), llvm::SDDbgOperand::fromVReg(), FuncInfo, llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getDbgValueList(), llvm::DIExpression::getFragmentInfo(), llvm::DebugLoc::getInlinedAt(), llvm::RegsForValue::getRegsAndSizes(), llvm::DIVariable::getSizeInBits(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SelectionDAG::getVRegDbgValue(), llvm::DILocalVariable::isParameter(), N, llvm::RegsForValue::occupiesMultipleRegs(), llvm::Offset, llvm::SmallVectorTemplateBase< T, bool >::push_back(), SI, llvm::FunctionLoweringInfo::StaticAllocaMap, and llvm::FunctionLoweringInfo::ValueMap.

Referenced by salvageUnresolvedDbgValue(), and visit().

init()

void SelectionDAGBuilder::init	(	GCFunctionInfo *	gfi,
		AAResults *	AA,
		AssumptionCache *	AC,
		const TargetLibraryInfo *	li
	)

Definition at line 1043 of file SelectionDAGBuilder.cpp.

References aa, AA, AC, Context, DAG, llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getTargetLoweringInfo(), GFI, LibInfo, LPadToCallSiteMap, and SL.

isExportableFromCurrentBlock()

bool SelectionDAGBuilder::isExportableFromCurrentBlock	(	const Value *	V,
		const BasicBlock *	FromBB
	)

Definition at line 2145 of file SelectionDAGBuilder.cpp.

References FuncInfo, llvm::BasicBlock::isEntryBlock(), llvm::FunctionLoweringInfo::isExportedInst(), and VI.

Referenced by EmitBranchForMergedCondition().

LowerAsSTATEPOINT()

SDValue SelectionDAGBuilder::LowerAsSTATEPOINT

(

SelectionDAGBuilder::StatepointLoweringInfo &

SI

)

Lower SLI into a STATEPOINT instruction.

Definition at line 706 of file StatepointLowering.cpp.

References llvm::append_range(), assert(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::count(), llvm::FunctionLoweringInfo::CreateRegs(), DAG, llvm::dbgs(), llvm::SelectionDAG::DeleteNode(), llvm::SmallVectorTemplateCommon< T, typename >::end(), ExportFromCurrentBlock(), FuncInfo, llvm::ISD::GC_TRANSITION_END, llvm::ISD::GC_TRANSITION_START, llvm::GCTransition, llvm::SelectionDAG::getContext(), getControlRoot(), llvm::RegsForValue::getCopyToRegs(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::GCRelocateInst::getDerivedPtr(), llvm::SDNode::getGluedNode(), llvm::StatepointLoweringState::getLocation(), llvm::SelectionDAG::getMachineNode(), llvm::SDValue::getNode(), llvm::SelectionDAG::getNode(), llvm::SDNode::getNumOperands(), llvm::SDNode::getNumValues(), llvm::SDNode::getOperand(), llvm::Instruction::getParent(), getRoot(), llvm::SelectionDAG::getRoot(), llvm::SelectionDAG::getSrcValue(), llvm::SelectionDAG::getTargetConstant(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::Value::getType(), getValue(), llvm::SDValue::getValue(), llvm::SelectionDAG::getVTList(), GFI, llvm::MVT::Glue, llvm::MVT::i32, llvm::MVT::i64, llvm::SmallVectorImpl< T >::insert(), llvm::Type::isPointerTy(), LLVM_DEBUG, lowerCallFromStatepointLoweringInfo(), lowerStatepointMetaArgs(), llvm::MaskAll, llvm::FunctionLoweringInfo::StatepointRelocationRecord::NoRelocate, llvm::SDNode::op_begin(), llvm::SDNode::op_end(), llvm::MVT::Other, llvm::SmallVectorTemplateBase< T, bool >::push_back(), pushStackMapConstant(), llvm::SelectionDAG::ReplaceAllUsesWith(), RetTy, llvm::StatepointLoweringState::scheduleRelocCall(), llvm::FunctionLoweringInfo::StatepointRelocationRecord::SDValueNode, llvm::StatepointLoweringState::setLocation(), llvm::SelectionDAG::setNodeMemRefs(), SI, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::size(), llvm::SmallVectorBase< Size_T >::size(), llvm::FunctionLoweringInfo::StatepointRelocationRecord::Spill, llvm::StatepointLoweringState::startNewStatepoint(), StatepointLowering, llvm::FunctionLoweringInfo::StatepointRelocationMaps, and llvm::FunctionLoweringInfo::StatepointRelocationRecord::VReg.

Referenced by LowerCallSiteWithDeoptBundleImpl(), and LowerStatepoint().

LowerCallSiteWithDeoptBundle()

void SelectionDAGBuilder::LowerCallSiteWithDeoptBundle	(	const CallBase *	Call,
		SDValue	Callee,
		const BasicBlock *	EHPadBB
	)

Definition at line 1166 of file StatepointLowering.cpp.

References Callee, and LowerCallSiteWithDeoptBundleImpl().

LowerCallSiteWithDeoptBundleImpl()

void SelectionDAGBuilder::LowerCallSiteWithDeoptBundleImpl	(	const CallBase *	Call,
		SDValue	Callee,
		const BasicBlock *	EHPadBB,
		bool	VarArgDisallowed,
		bool	ForceVoidReturnTy
	)

Definition at line 1133 of file StatepointLowering.cpp.

References Callee, DAG, llvm::StatepointDirectives::DeoptBundleStatepointID, llvm::SelectionDAG::getContext(), llvm::Type::getVoidTy(), LowerAsSTATEPOINT(), lowerRangeToAssertZExt(), llvm::None, llvm::LLVMContext::OB_deopt, llvm::parseStatepointDirectivesFromAttrs(), populateCallLoweringInfo(), setValue(), and SI.

Referenced by LowerCallSiteWithDeoptBundle(), and LowerDeoptimizeCall().

LowerCallTo()

void SelectionDAGBuilder::LowerCallTo	(	const CallBase &	CB,
		SDValue	Callee,
		bool	IsTailCall,
		bool	IsMustTailCall,
		const BasicBlock *	EHPadBB = nullptr
	)

Definition at line 7890 of file SelectionDAGBuilder.cpp.

References llvm::CallBase::arg_begin(), llvm::CallBase::arg_end(), llvm::CallBase::arg_size(), assert(), Callee, llvm::CallBase::countOperandBundlesOfType(), llvm::TargetLowering::CallLoweringInfo::DAG, DAG, llvm::TargetLowering::CallLoweringInfo::DL, DL, E, FuncInfo, llvm::SelectionDAG::getCopyToReg(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::CallBase::getFunctionType(), llvm::CallBase::getOperandBundle(), llvm::SwiftErrorValueTracking::getOrCreateVRegDefAt(), llvm::SwiftErrorValueTracking::getOrCreateVRegUseAt(), llvm::BasicBlock::getParent(), llvm::Instruction::getParent(), llvm::TargetLoweringBase::getPointerTy(), llvm::SelectionDAG::getRegister(), getRoot(), llvm::SelectionDAG::getTarget(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::ConstantInt::getType(), llvm::Value::getType(), getValue(), I, llvm::TargetLowering::CallLoweringInfo::InVals, llvm::CallBase::isConvergent(), llvm::Type::isEmptyTy(), llvm::CallBase::isIndirectCall(), llvm::isInTailCallPosition(), llvm::Type::isIntegerTy(), isMustTailCall(), lowerInvokable(), lowerRangeToAssertZExt(), llvm::FunctionLoweringInfo::MBB, llvm::LLVMContext::OB_cfguardtarget, llvm::LLVMContext::OB_kcfi, llvm::LLVMContext::OB_preallocated, llvm::report_fatal_error(), RetTy, llvm::TargetLowering::CallLoweringInfo::setCallee(), llvm::TargetLowering::CallLoweringInfo::setCFIType(), llvm::TargetLowering::CallLoweringInfo::setChain(), llvm::TargetLowering::CallLoweringInfo::setConvergent(), llvm::TargetLowering::CallLoweringInfo::setDebugLoc(), llvm::TargetLowering::CallLoweringInfo::setIsPreallocated(), llvm::SelectionDAG::setRoot(), llvm::TargetLowering::CallLoweringInfo::setTailCall(), setValue(), llvm::TargetLowering::supportKCFIBundles(), llvm::TargetLowering::supportSwiftError(), and SwiftError.

LowerDeoptimizeCall()

void SelectionDAGBuilder::LowerDeoptimizeCall

(

const CallInst *

CI

)

Definition at line 1294 of file StatepointLowering.cpp.

References Callee, DAG, llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getExternalSymbol(), llvm::SelectionDAG::getTargetLoweringInfo(), and LowerCallSiteWithDeoptBundleImpl().

LowerDeoptimizingReturn()

void SelectionDAGBuilder::LowerDeoptimizingReturn

(

)

Definition at line 1307 of file StatepointLowering.cpp.

References DAG, getCurSDLoc(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getRoot(), llvm::SelectionDAG::getTarget(), llvm::TargetMachine::Options, llvm::MVT::Other, llvm::SelectionDAG::setRoot(), llvm::ISD::TRAP, and llvm::TargetOptions::TrapUnreachable.

lowerInvokable()

std::pair< SDValue, SDValue > SelectionDAGBuilder::lowerInvokable	(	TargetLowering::CallLoweringInfo &	CLI,
		const BasicBlock *	EHPadBB = nullptr
	)

Definition at line 7850 of file SelectionDAGBuilder.cpp.

References assert(), llvm::TargetLowering::CallLoweringInfo::CB, DAG, getControlRoot(), getRoot(), llvm::SelectionDAG::getTargetLoweringInfo(), HasTailCall, llvm::TargetLowering::CallLoweringInfo::IsTailCall, llvm::TargetLowering::LowerCallTo(), llvm::TargetLowering::CallLoweringInfo::setChain(), and llvm::SelectionDAG::setRoot().

Referenced by LowerCallTo().

lowerRangeToAssertZExt()

SDValue SelectionDAGBuilder::lowerRangeToAssertZExt	(	SelectionDAG &	DAG,
		const Instruction &	I,
		SDValue	Op
	)

Definition at line 9455 of file SelectionDAGBuilder.cpp.

References llvm::ISD::AssertZext, DAG, llvm::getConstantRangeFromMetadata(), llvm::SelectionDAG::getContext(), getCurSDLoc(), llvm::EVT::getIntegerVT(), llvm::SelectionDAG::getMergeValues(), llvm::SelectionDAG::getNode(), llvm::ConstantRange::getUnsignedMax(), llvm::ConstantRange::getUnsignedMin(), llvm::SelectionDAG::getValueType(), llvm::Hi, I, llvm::ConstantRange::isEmptySet(), llvm::ConstantRange::isFullSet(), llvm::ConstantRange::isUpperWrapped(), llvm::Lo, llvm::IntegerType::MIN_INT_BITS, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and SL.

Referenced by LowerCallSiteWithDeoptBundleImpl(), and LowerCallTo().

LowerStatepoint()

void SelectionDAGBuilder::LowerStatepoint	(	const GCStatepointInst &	I,
		const BasicBlock *	EHPadBB = nullptr
	)

Definition at line 1011 of file StatepointLowering.cpp.

References llvm::CallingConv::AnyReg, assert(), llvm::GCStatepointInst::CallArgsBeginPos, Callee, llvm::FunctionLoweringInfo::CreateRegs(), DAG, FuncInfo, llvm::SelectionDAG::getContext(), llvm::RegsForValue::getCopyToRegs(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getEntryNode(), getGCResultLocality(), llvm::SelectionDAG::getIntPtrConstant(), llvm::GCFunctionInfo::getStrategy(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SelectionDAG::getUNDEF(), getValue(), GFI, I, llvm::SmallSet< T, N, C >::insert(), isGCValue(), LowerAsSTATEPOINT(), populateCallLoweringInfo(), RetTy, setValue(), SI, llvm::GCStrategy::useStatepoints(), and llvm::FunctionLoweringInfo::ValueMap.

populateCallLoweringInfo()

void SelectionDAGBuilder::populateCallLoweringInfo	(	TargetLowering::CallLoweringInfo &	CLI,
		const CallBase *	Call,
		unsigned	ArgIdx,
		unsigned	NumArgs,
		SDValue	Callee,
		Type *	ReturnTy,
		bool	IsPatchPoint
	)

Populate a CallLowerinInfo (into CLI) based on the properties of the call being lowered.

This is a helper for lowering intrinsics that follow a target calling convention or require stack pointer adjustment. Only a subset of the intrinsic's operands need to participate in the calling convention.

Definition at line 9499 of file SelectionDAGBuilder.cpp.

References assert(), Callee, getCurSDLoc(), getRoot(), llvm::Value::getType(), getValue(), llvm::Type::isEmptyTy(), llvm::LLVMContext::OB_preallocated, llvm::TargetLowering::CallLoweringInfo::setCallee(), llvm::TargetLowering::CallLoweringInfo::setChain(), llvm::TargetLowering::CallLoweringInfo::setDebugLoc(), llvm::TargetLowering::CallLoweringInfo::setDiscardResult(), llvm::TargetLowering::CallLoweringInfo::setIsPatchPoint(), and llvm::TargetLowering::CallLoweringInfo::setIsPreallocated().

Referenced by LowerCallSiteWithDeoptBundleImpl(), and LowerStatepoint().

resolveDanglingDebugInfo()

void SelectionDAGBuilder::resolveDanglingDebugInfo	(	const Value *	V,
		SDValue	Val
	)

If we saw an earlier dbg_value referring to V, generate the debug data structures now that we've seen its definition.

Definition at line 1268 of file SelectionDAGBuilder.cpp.

References llvm::SelectionDAG::AddDbgValue(), assert(), DAG, llvm::dbgs(), DL, llvm::SDValue::dump(), llvm::UndefValue::get(), llvm::SelectionDAG::getConstantDbgValue(), llvm::SelectionDAG::getFunctionVarLocs(), llvm::SDNode::getIROrder(), llvm::SDValue::getNode(), llvm::Value::getType(), llvm::DILocalVariable::isValidLocationForIntrinsic(), and LLVM_DEBUG.

Referenced by getCopyFromRegs(), getNonRegisterValue(), and getValue().

resolveOrClearDbgInfo()

void SelectionDAGBuilder::resolveOrClearDbgInfo

(

)

Evict any dangling debug information, attempting to salvage it first.

Definition at line 1517 of file SelectionDAGBuilder.cpp.

References clearDanglingDebugInfo(), and salvageUnresolvedDbgValue().

salvageUnresolvedDbgValue()

void SelectionDAGBuilder::salvageUnresolvedDbgValue

(

DanglingDebugInfo &

DDI

)

For the given dangling debuginfo record, perform last-ditch efforts to resolve the debuginfo to something that is represented in this DAG.

If this cannot be done, produce an Undef debug value record.

Definition at line 1320 of file SelectionDAGBuilder.cpp.

References llvm::SelectionDAG::AddDbgValue(), llvm::DIExpression::appendOpsToArg(), assert(), DAG, llvm::dbgs(), DL, llvm::SmallVectorBase< Size_T >::empty(), llvm::UndefValue::get(), llvm::SelectionDAG::getConstantDbgValue(), llvm::SelectionDAG::getFunctionVarLocs(), llvm::DIExpression::getNumLocationOperands(), llvm::Value::getType(), handleDebugValue(), LLVM_DEBUG, and llvm::salvageDebugInfoImpl().

Referenced by dropDanglingDebugInfo(), and resolveOrClearDbgInfo().

setUnusedArgValue()

void llvm::SelectionDAGBuilder::setUnusedArgValue ( const Value *  V, SDValue  NewN  )

inline

Definition at line 389 of file SelectionDAGBuilder.h.

References assert(), and N.

setValue()

void llvm::SelectionDAGBuilder::setValue ( const Value *  V, SDValue  NewN  )

inline

Definition at line 383 of file SelectionDAGBuilder.h.

References assert(), and N.

Referenced by LowerCallSiteWithDeoptBundleImpl(), LowerCallTo(), LowerStatepoint(), and visitSwitchCase().

ShouldEmitAsBranches()

bool SelectionDAGBuilder::ShouldEmitAsBranches

(

const std::vector< SwitchCG::CaseBlock > &

Cases

)

If the set of cases should be emitted as a series of branches, return true.

If we should emit this as a bunch of and/or'd together conditions, return false.

Definition at line 2388 of file SelectionDAGBuilder.cpp.

References CC, llvm::ISD::SETEQ, and llvm::ISD::SETNE.

UpdateSplitBlock()

void SelectionDAGBuilder::UpdateSplitBlock	(	MachineBasicBlock *	First,
		MachineBasicBlock *	Last
	)

When an MBB was split during scheduling, update the references that need to refer to the last resulting block.

Definition at line 3127 of file SelectionDAGBuilder.cpp.

References llvm::Last, llvm::SwitchCG::BitTestBlock::Parent, and SL.

visit() [1/2]

void SelectionDAGBuilder::visit

(

const Instruction &

I

)

Definition at line 1132 of file SelectionDAGBuilder.cpp.

References addDanglingDebugInfo(), llvm::SelectionDAG::addPCSections(), assert(), CopyToExportRegsIfNeeded(), DAG, dropDanglingDebugInfo(), llvm::errs(), llvm::SelectionDAG::getFunctionVarLocs(), handleDebugValue(), HasTailCall, I, LLVM_DEBUG, and visit().

Referenced by getValueImpl(), and visit().

visit() [2/2]

void SelectionDAGBuilder::visit	(	unsigned	Opcode,
		const User &	I
	)

Definition at line 1196 of file SelectionDAGBuilder.cpp.

References llvm_unreachable.

visitBitTestCase()

void SelectionDAGBuilder::visitBitTestCase	(	SwitchCG::BitTestBlock &	BB,
		MachineBasicBlock *	NextMBB,
		BranchProbability	BranchProbToNext,
		unsigned	Reg,
		SwitchCG::BitTestCase &	B,
		MachineBasicBlock *	SwitchBB
	)

visitBitTestCase - this function produces one "bit test"

Definition at line 2887 of file SelectionDAGBuilder.cpp.

References llvm::ISD::AND, B, llvm::ISD::BR, llvm::ISD::BRCOND, llvm::countr_one(), llvm::countr_zero(), DAG, llvm::SelectionDAG::getBasicBlock(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getContext(), getControlRoot(), llvm::SelectionDAG::getCopyFromReg(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getSetCC(), llvm::TargetLoweringBase::getSetCCResultType(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::MachineBasicBlock::normalizeSuccProbs(), llvm::MVT::Other, llvm::popcount(), llvm::SwitchCG::BitTestBlock::Range, llvm::SwitchCG::BitTestBlock::RegVT, llvm::ISD::SETEQ, llvm::ISD::SETNE, llvm::SelectionDAG::setRoot(), and llvm::ISD::SHL.

visitBitTestHeader()

void SelectionDAGBuilder::visitBitTestHeader	(	SwitchCG::BitTestBlock &	B,
		MachineBasicBlock *	SwitchBB
	)

visitBitTestHeader - This function emits necessary code to produce value suitable for "bit tests"

Definition at line 2825 of file SelectionDAGBuilder.cpp.

References B, llvm::ISD::BR, llvm::ISD::BRCOND, llvm::FunctionLoweringInfo::CreateReg(), DAG, FuncInfo, llvm::SelectionDAG::getBasicBlock(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getContext(), getControlRoot(), llvm::SelectionDAG::getCopyToReg(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getPointerTy(), llvm::SelectionDAG::getSetCC(), llvm::TargetLoweringBase::getSetCCResultType(), llvm::EVT::getSimpleVT(), llvm::EVT::getSizeInBits(), llvm::SelectionDAG::getTargetLoweringInfo(), getValue(), llvm::SDValue::getValueType(), llvm::SelectionDAG::getZExtOrTrunc(), llvm::TargetLoweringBase::isTypeLegal(), llvm::isUIntN(), MBB, llvm::MachineBasicBlock::normalizeSuccProbs(), llvm::MVT::Other, llvm::SelectionDAG::setRoot(), llvm::ISD::SETUGT, and llvm::ISD::SUB.

visitJumpTable()

void SelectionDAGBuilder::visitJumpTable

(

SwitchCG::JumpTable &

JT

)

visitJumpTable - Emit JumpTable node in the current MBB

Definition at line 2607 of file SelectionDAGBuilder.cpp.

References assert(), llvm::ISD::BR_JT, DAG, getControlRoot(), llvm::SelectionDAG::getCopyFromReg(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getJumpTable(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getPointerTy(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::MVT::Other, and llvm::SelectionDAG::setRoot().

visitJumpTableHeader()

void SelectionDAGBuilder::visitJumpTableHeader	(	SwitchCG::JumpTable &	JT,
		SwitchCG::JumpTableHeader &	JTH,
		MachineBasicBlock *	SwitchBB
	)

visitJumpTableHeader - This function emits necessary code to produce index in the JumpTable from switch case.

Definition at line 2622 of file SelectionDAGBuilder.cpp.

References llvm::ISD::BR, llvm::ISD::BRCOND, llvm::FunctionLoweringInfo::CreateReg(), DAG, llvm::SwitchCG::JumpTableHeader::FallthroughUnreachable, llvm::SwitchCG::JumpTableHeader::First, FuncInfo, llvm::SelectionDAG::getBasicBlock(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getContext(), getControlRoot(), llvm::SelectionDAG::getCopyToReg(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getPointerTy(), llvm::SelectionDAG::getSetCC(), llvm::TargetLoweringBase::getSetCCResultType(), llvm::SelectionDAG::getTargetLoweringInfo(), getValue(), llvm::SDValue::getValueType(), llvm::SelectionDAG::getZExtOrTrunc(), llvm::SwitchCG::JumpTableHeader::Last, llvm::MVT::Other, llvm::SelectionDAG::setRoot(), llvm::ISD::SETUGT, llvm::ISD::SUB, and llvm::SwitchCG::JumpTableHeader::SValue.

visitSPDescriptorFailure()

void SelectionDAGBuilder::visitSPDescriptorFailure

(

StackProtectorDescriptor &

SPD

)

Codegen the failure basic block for a stack protector check.

A failure stack protector machine basic block consists simply of a call to __stack_chk_fail().

For a high level explanation of how this fits into the stack protector generation see the comment on the declaration of class StackProtectorDescriptor.

Definition at line 2801 of file SelectionDAGBuilder.cpp.

References DAG, getCurSDLoc(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::TargetMachine::getTargetTriple(), llvm::Triple::isPS(), llvm::MVT::isVoid, llvm::Triple::isWasm(), llvm::TargetLowering::makeLibCall(), llvm::MVT::Other, llvm::TargetLowering::MakeLibCallOptions::setDiscardResult(), llvm::SelectionDAG::setRoot(), and llvm::ISD::TRAP.

visitSPDescriptorParent()

void SelectionDAGBuilder::visitSPDescriptorParent	(	StackProtectorDescriptor &	SPD,
		MachineBasicBlock *	ParentBB
	)

Codegen a new tail for a stack protector check ParentMBB which has had its tail spliced into a stack protector check success bb.

For a high level explanation of how this fits into the stack protector generation see the comment on the declaration of class StackProtectorDescriptor.

Definition at line 2706 of file SelectionDAGBuilder.cpp.

References assert(), llvm::ISD::BR, llvm::ISD::BRCOND, DAG, llvm::TargetLowering::emitStackGuardXorFP(), llvm::SelectionDAG::getBasicBlock(), llvm::SelectionDAG::getContext(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getEntryNode(), llvm::StackProtectorDescriptor::getFailureMBB(), llvm::MachinePointerInfo::getFixedStack(), llvm::SelectionDAG::getFrameIndex(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::Type::getInt8PtrTy(), llvm::SelectionDAG::getLoad(), getLoadStackGuard(), llvm::SelectionDAG::getMachineFunction(), llvm::SelectionDAG::getNode(), llvm::FunctionType::getNumParams(), llvm::SDValue::getOperand(), llvm::FunctionType::getParamType(), llvm::GlobalValue::getParent(), llvm::MachineBasicBlock::getParent(), llvm::TargetLoweringBase::getPointerMemTy(), llvm::TargetLoweringBase::getPointerTy(), llvm::DataLayout::getPrefTypeAlign(), llvm::FunctionType::getReturnType(), llvm::TargetLoweringBase::getSDagStackGuard(), llvm::SelectionDAG::getSetCC(), llvm::TargetLoweringBase::getSetCCResultType(), llvm::TargetLoweringBase::getSSPStackGuardCheck(), llvm::MachineFrameInfo::getStackProtectorIndex(), llvm::StackProtectorDescriptor::getSuccessMBB(), llvm::SelectionDAG::getTargetLoweringInfo(), getValue(), llvm::SDValue::getValueType(), llvm::TargetLowering::LowerCallTo(), llvm::MachineMemOperand::MOVolatile, llvm::MVT::Other, llvm::TargetLowering::CallLoweringInfo::setCallee(), llvm::TargetLowering::CallLoweringInfo::setChain(), llvm::TargetLowering::CallLoweringInfo::setDebugLoc(), llvm::ISD::SETNE, llvm::SelectionDAG::setRoot(), llvm::TargetLowering::useLoadStackGuardNode(), and llvm::TargetLoweringBase::useStackGuardXorFP().

visitSwitchCase()

void SelectionDAGBuilder::visitSwitchCase	(	SwitchCG::CaseBlock &	CB,
		MachineBasicBlock *	SwitchBB
	)

visitSwitchCase - Emits the necessary code to represent a single node in the binary search tree resulting from lowering a switch instruction.

Definition at line 2512 of file SelectionDAGBuilder.cpp.

References assert(), llvm::ISD::BR, llvm::ISD::BRCOND, llvm::SwitchCG::CaseBlock::CC, llvm::SwitchCG::CaseBlock::CmpLHS, llvm::SwitchCG::CaseBlock::CmpMHS, llvm::SwitchCG::CaseBlock::CmpRHS, Cond, DAG, llvm::SwitchCG::CaseBlock::DL, llvm::SwitchCG::CaseBlock::FalseBB, llvm::SwitchCG::CaseBlock::FalseProb, llvm::SelectionDAG::getBasicBlock(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getContext(), getControlRoot(), getCurSDLoc(), llvm::SelectionDAG::getDataLayout(), llvm::ConstantInt::getFalse(), llvm::TargetLoweringBase::getMemValueType(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getPtrExtOrTrunc(), llvm::SelectionDAG::getSetCC(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::ConstantInt::getTrue(), llvm::Value::getType(), getValue(), llvm::SDValue::getValueType(), High, llvm::MVT::i1, llvm::Low, llvm::MachineBasicBlock::normalizeSuccProbs(), llvm::MVT::Other, llvm::ISD::SETEQ, llvm::ISD::SETLE, llvm::SelectionDAG::setRoot(), llvm::ISD::SETTRUE, llvm::ISD::SETULE, setValue(), llvm::ISD::SUB, std::swap(), llvm::SwitchCG::CaseBlock::TrueBB, llvm::SwitchCG::CaseBlock::TrueProb, and llvm::ISD::XOR.

Member Data Documentation

AA

AAResults* llvm::SelectionDAGBuilder::AA = nullptr

Definition at line 244 of file SelectionDAGBuilder.h.

Referenced by init().

AC

AssumptionCache* llvm::SelectionDAGBuilder::AC = nullptr

Definition at line 245 of file SelectionDAGBuilder.h.

Referenced by init().

ConstantsOut

DenseMap<const Constant *, unsigned> llvm::SelectionDAGBuilder::ConstantsOut

Definition at line 273 of file SelectionDAGBuilder.h.

Context

LLVMContext* llvm::SelectionDAGBuilder::Context

Definition at line 291 of file SelectionDAGBuilder.h.

Referenced by init().

DAG

SelectionDAG& llvm::SelectionDAGBuilder::DAG

Definition at line 243 of file SelectionDAGBuilder.h.

Referenced by addDanglingDebugInfo(), CopyValueToVirtualRegister(), dropDanglingDebugInfo(), EmitBranchForMergedCondition(), FindMergedConditions(), getCopyFromRegs(), getFrameIndexTy(), getUniformBase(), getValueImpl(), handleDebugValue(), init(), LowerAsSTATEPOINT(), LowerCallSiteWithDeoptBundleImpl(), LowerCallTo(), LowerDeoptimizeCall(), LowerDeoptimizingReturn(), lowerInvokable(), lowerRangeToAssertZExt(), LowerStatepoint(), resolveDanglingDebugInfo(), salvageUnresolvedDbgValue(), visit(), visitBitTestCase(), visitBitTestHeader(), visitJumpTable(), visitJumpTableHeader(), visitSPDescriptorFailure(), visitSPDescriptorParent(), and visitSwitchCase().

FuncInfo

FunctionLoweringInfo& llvm::SelectionDAGBuilder::FuncInfo

Information about the function as a whole.

Definition at line 276 of file SelectionDAGBuilder.h.

Referenced by CopyToExportRegsIfNeeded(), CopyValueToVirtualRegister(), ExportFromCurrentBlock(), getCopyFromRegs(), getValueImpl(), handleDebugValue(), isExportableFromCurrentBlock(), LowerAsSTATEPOINT(), LowerCallTo(), LowerStatepoint(), visitBitTestHeader(), and visitJumpTableHeader().

GFI

GCFunctionInfo* llvm::SelectionDAGBuilder::GFI

Garbage collection metadata for the function.

Definition at line 282 of file SelectionDAGBuilder.h.

Referenced by init(), LowerAsSTATEPOINT(), and LowerStatepoint().

HasTailCall

bool llvm::SelectionDAGBuilder::HasTailCall = false

This is set to true if a call in the current block has been translated as a tail call.

In this case, no subsequent DAG nodes should be created.

Definition at line 289 of file SelectionDAGBuilder.h.

Referenced by clear(), lowerInvokable(), and visit().

LibInfo

const TargetLibraryInfo* llvm::SelectionDAGBuilder::LibInfo

Definition at line 246 of file SelectionDAGBuilder.h.

Referenced by init().

LowestSDNodeOrder

const unsigned llvm::SelectionDAGBuilder::LowestSDNodeOrder = 1

static

Lowest valid SDNodeOrder.

The special case 0 is reserved for scheduling nodes without a corresponding SDNode.

Definition at line 241 of file SelectionDAGBuilder.h.

Referenced by clear().

LPadToCallSiteMap

DenseMap<MachineBasicBlock *, SmallVector<unsigned, 4> > llvm::SelectionDAGBuilder::LPadToCallSiteMap

Map a landing pad to the call site indexes.

Definition at line 285 of file SelectionDAGBuilder.h.

Referenced by init().

PendingLoads

SmallVector<SDValue, 8> llvm::SelectionDAGBuilder::PendingLoads

Loads are not emitted to the program immediately.

We bunch them up and then emit token factor nodes when possible. This allows us to get simple disambiguation between loads without worrying about alias analysis.

Definition at line 182 of file SelectionDAGBuilder.h.

Referenced by clear(), getMemoryRoot(), and getRoot().

SL

std::unique_ptr<SDAGSwitchLowering> llvm::SelectionDAGBuilder::SL

Definition at line 265 of file SelectionDAGBuilder.h.

Referenced by EmitBranchForMergedCondition(), init(), lowerRangeToAssertZExt(), and UpdateSplitBlock().

SPDescriptor

StackProtectorDescriptor llvm::SelectionDAGBuilder::SPDescriptor

A StackProtectorDescriptor structure used to communicate stack protector information in between SelectBasicBlock and FinishBasicBlock.

Definition at line 269 of file SelectionDAGBuilder.h.

StatepointLowering

StatepointLoweringState llvm::SelectionDAGBuilder::StatepointLowering

State used while lowering a statepoint sequence (gc_statepoint, gc_relocate, and gc_result).

See StatepointLowering.hpp/cpp for details.

Definition at line 186 of file SelectionDAGBuilder.h.

Referenced by clear(), and LowerAsSTATEPOINT().

SwiftError

SwiftErrorValueTracking& llvm::SelectionDAGBuilder::SwiftError

Information about the swifterror values used throughout the function.

Definition at line 279 of file SelectionDAGBuilder.h.

Referenced by LowerCallTo().

---

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

• lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
• lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
• lib/CodeGen/SelectionDAG/StatepointLowering.cpp