LLVM  10.0.0svn
Macros | Functions | Variables
SelectionDAG.cpp File Reference
#include "llvm/CodeGen/SelectionDAG.h"
#include "SDNodeDbgValue.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
#include "llvm/CodeGen/SelectionDAGAddressAnalysis.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Support/MachineValueType.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <cstdlib>
#include <limits>
#include <set>
#include <string>
#include <utility>
#include <vector>

Go to the source code of this file.

Macros

#define DEBUG_TYPE   "selectiondag"
 

Functions

static SDVTList makeVTList (const EVT *VTs, unsigned NumVTs)
 makeVTList - Return an instance of the SDVTList struct initialized with the specified members. More...
 
static void NewSDValueDbgMsg (SDValue V, StringRef Msg, SelectionDAG *G)
 
static int isSignedOp (ISD::CondCode Opcode)
 For an integer comparison, return 1 if the comparison is a signed operation and 2 if the result is an unsigned comparison. More...
 
static void AddNodeIDOpcode (FoldingSetNodeID &ID, unsigned OpC)
 AddNodeIDOpcode - Add the node opcode to the NodeID data. More...
 
static void AddNodeIDValueTypes (FoldingSetNodeID &ID, SDVTList VTList)
 AddNodeIDValueTypes - Value type lists are intern'd so we can represent them solely with their pointer. More...
 
static void AddNodeIDOperands (FoldingSetNodeID &ID, ArrayRef< SDValue > Ops)
 AddNodeIDOperands - Various routines for adding operands to the NodeID data. More...
 
static void AddNodeIDOperands (FoldingSetNodeID &ID, ArrayRef< SDUse > Ops)
 AddNodeIDOperands - Various routines for adding operands to the NodeID data. More...
 
static void AddNodeIDNode (FoldingSetNodeID &ID, unsigned short OpC, SDVTList VTList, ArrayRef< SDValue > OpList)
 
static void AddNodeIDCustom (FoldingSetNodeID &ID, const SDNode *N)
 If this is an SDNode with special info, add this info to the NodeID data. More...
 
static void AddNodeIDNode (FoldingSetNodeID &ID, const SDNode *N)
 AddNodeIDNode - Generic routine for adding a nodes info to the NodeID data. More...
 
static bool doNotCSE (SDNode *N)
 doNotCSE - Return true if CSE should not be performed for this node. More...
 
static void VerifySDNode (SDNode *N)
 VerifySDNode - Sanity check the given SDNode. Aborts if it is invalid. More...
 
static void commuteShuffle (SDValue &N1, SDValue &N2, MutableArrayRef< int > M)
 Swaps the values of N1 and N2. More...
 
static const APIntgetValidShiftAmountConstant (SDValue V)
 If a SHL/SRA/SRL node has a constant or splat constant shift amount that is less than the element bit-width of the shift node, return it. More...
 
static const APIntgetValidMinimumShiftAmountConstant (SDValue V)
 If a SHL/SRA/SRL node has constant vector shift amounts that are all less than the element bit-width of the shift node, return the minimum value. More...
 
static SDValue FoldBUILD_VECTOR (const SDLoc &DL, EVT VT, ArrayRef< SDValue > Ops, SelectionDAG &DAG)
 
static SDValue foldCONCAT_VECTORS (const SDLoc &DL, EVT VT, ArrayRef< SDValue > Ops, SelectionDAG &DAG)
 Try to simplify vector concatenation to an input value, undef, or build vector. More...
 
static std::pair< APInt, boolFoldValue (unsigned Opcode, const APInt &C1, const APInt &C2)
 
static SDValue getMemsetValue (SDValue Value, EVT VT, SelectionDAG &DAG, const SDLoc &dl)
 getMemsetValue - Vectorized representation of the memset value operand. More...
 
static SDValue getMemsetStringVal (EVT VT, const SDLoc &dl, SelectionDAG &DAG, const TargetLowering &TLI, const ConstantDataArraySlice &Slice)
 getMemsetStringVal - Similar to getMemsetValue. More...
 
static bool isMemSrcFromConstant (SDValue Src, ConstantDataArraySlice &Slice)
 Returns true if memcpy source is constant data. More...
 
static bool shouldLowerMemFuncForSize (const MachineFunction &MF)
 
static void chainLoadsAndStoresForMemcpy (SelectionDAG &DAG, const SDLoc &dl, SmallVector< SDValue, 32 > &OutChains, unsigned From, unsigned To, SmallVector< SDValue, 16 > &OutLoadChains, SmallVector< SDValue, 16 > &OutStoreChains)
 
static SDValue getMemcpyLoadsAndStores (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, uint64_t Size, unsigned Alignment, bool isVol, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo)
 
static SDValue getMemmoveLoadsAndStores (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, uint64_t Size, unsigned Align, bool isVol, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo)
 
static SDValue getMemsetStores (SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, uint64_t Size, unsigned Align, bool isVol, MachinePointerInfo DstPtrInfo)
 Lower the call to 'memset' intrinsic function into a series of store operations. More...
 
static void checkAddrSpaceIsValidForLibcall (const TargetLowering *TLI, unsigned AS)
 
static MachinePointerInfo InferPointerInfo (const MachinePointerInfo &Info, SelectionDAG &DAG, SDValue Ptr, int64_t Offset=0)
 InferPointerInfo - If the specified ptr/offset is a frame index, infer a MachinePointerInfo record from it. More...
 
static MachinePointerInfo InferPointerInfo (const MachinePointerInfo &Info, SelectionDAG &DAG, SDValue Ptr, SDValue OffsetOp)
 InferPointerInfo - If the specified ptr/offset is a frame index, infer a MachinePointerInfo record from it. More...
 
static void checkForCyclesHelper (const SDNode *N, SmallPtrSetImpl< const SDNode *> &Visited, SmallPtrSetImpl< const SDNode *> &Checked, const llvm::SelectionDAG *DAG)
 

Variables

static cl::opt< boolEnableMemCpyDAGOpt ("enable-memcpy-dag-opt", cl::Hidden, cl::init(true), cl::desc("Gang up loads and stores generated by inlining of memcpy"))
 
static cl::opt< int > MaxLdStGlue ("ldstmemcpy-glue-max", cl::desc("Number limit for gluing ld/st of memcpy."), cl::Hidden, cl::init(0))
 
static ManagedStatic< std::set< EVT, EVT::compareRawBits > > EVTs
 
static ManagedStatic< EVTArray > SimpleVTArray
 
static ManagedStatic< sys::SmartMutex< true > > VTMutex
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "selectiondag"

Definition at line 92 of file SelectionDAG.cpp.

Function Documentation

◆ AddNodeIDCustom()

static void AddNodeIDCustom ( FoldingSetNodeID ID,
const SDNode N 
)
static

If this is an SDNode with special info, add this info to the NodeID data.

Definition at line 472 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddBoolean(), llvm::FoldingSetNodeID::AddInteger(), llvm::FoldingSetNodeID::AddPointer(), llvm::MachineConstantPoolValue::addSelectionDAGCSEId(), llvm::ISD::ATOMIC_CMP_SWAP, llvm::ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, llvm::ISD::ATOMIC_LOAD, llvm::ISD::ATOMIC_LOAD_ADD, llvm::ISD::ATOMIC_LOAD_AND, llvm::ISD::ATOMIC_LOAD_CLR, llvm::ISD::ATOMIC_LOAD_MAX, llvm::ISD::ATOMIC_LOAD_MIN, llvm::ISD::ATOMIC_LOAD_NAND, llvm::ISD::ATOMIC_LOAD_OR, llvm::ISD::ATOMIC_LOAD_SUB, llvm::ISD::ATOMIC_LOAD_UMAX, llvm::ISD::ATOMIC_LOAD_UMIN, llvm::ISD::ATOMIC_LOAD_XOR, llvm::ISD::ATOMIC_STORE, llvm::ISD::ATOMIC_SWAP, llvm::ISD::BasicBlock, llvm::ISD::BlockAddress, C, llvm::ISD::Constant, llvm::ISD::ConstantFP, llvm::ISD::ConstantPool, llvm::HexagonISD::CP, llvm::numbers::e, llvm::ISD::ExternalSymbol, llvm::ISD::FrameIndex, llvm::MachinePointerInfo::getAddrSpace(), llvm::ConstantPoolSDNode::getAlignment(), llvm::SelectionDAG::getBasicBlock(), llvm::BlockAddressSDNode::getBlockAddress(), llvm::ConstantSDNode::getConstantIntValue(), llvm::ConstantPoolSDNode::getConstVal(), llvm::GlobalAddressSDNode::getGlobal(), llvm::TargetIndexSDNode::getIndex(), llvm::ConstantPoolSDNode::getMachineCPVal(), llvm::ShuffleVectorSDNode::getMaskElt(), llvm::MemSDNode::getMemoryVT(), llvm::getOffset(), llvm::GlobalAddressSDNode::getOffset(), llvm::ConstantPoolSDNode::getOffset(), llvm::TargetIndexSDNode::getOffset(), llvm::BlockAddressSDNode::getOffset(), llvm::SDNode::getOpcode(), llvm::MemSDNode::getPointerInfo(), llvm::EVT::getRawBits(), llvm::MemSDNode::getRawSubclassData(), getReg(), llvm::GlobalAddressSDNode::getTargetFlags(), llvm::ConstantPoolSDNode::getTargetFlags(), llvm::TargetIndexSDNode::getTargetFlags(), llvm::BlockAddressSDNode::getTargetFlags(), llvm::SDNode::getValueType(), llvm::EVT::getVectorNumElements(), llvm::ISD::GlobalAddress, llvm::ISD::GlobalTLSAddress, llvm::ConstantPoolSDNode::isMachineConstantPoolEntry(), llvm::ConstantSDNode::isOpaque(), llvm::SDNode::isTargetMemoryOpcode(), llvm::ISD::JumpTable, llvm::ARM_MB::LD, llvm::ISD::LIFETIME_END, llvm::ISD::LIFETIME_START, llvm_unreachable, llvm::ISD::LOAD, llvm::ISD::MCSymbol, llvm::ISD::MGATHER, llvm::ISD::MLOAD, llvm::ISD::MSCATTER, llvm::ISD::MSTORE, N, llvm::ISD::PREFETCH, llvm::ISD::Register, llvm::ISD::RegisterMask, llvm::ISD::SRCVALUE, llvm::ARM_MB::ST, llvm::ISD::STORE, llvm::ISD::TargetBlockAddress, llvm::ISD::TargetConstant, llvm::ISD::TargetConstantFP, llvm::ISD::TargetConstantPool, llvm::ISD::TargetExternalSymbol, llvm::ISD::TargetFrameIndex, llvm::ISD::TargetGlobalAddress, llvm::ISD::TargetGlobalTLSAddress, llvm::ISD::TargetIndex, llvm::ISD::TargetJumpTable, and llvm::ISD::VECTOR_SHUFFLE.

Referenced by AddNodeIDNode(), and VerifySDNode().

◆ AddNodeIDNode() [1/2]

static void AddNodeIDNode ( FoldingSetNodeID ID,
unsigned short  OpC,
SDVTList  VTList,
ArrayRef< SDValue OpList 
)
static

◆ AddNodeIDNode() [2/2]

static void AddNodeIDNode ( FoldingSetNodeID ID,
const SDNode N 
)
static

AddNodeIDNode - Generic routine for adding a nodes info to the NodeID data.

Definition at line 640 of file SelectionDAG.cpp.

References AddNodeIDCustom(), AddNodeIDOpcode(), AddNodeIDOperands(), AddNodeIDValueTypes(), llvm::SDNode::getOpcode(), llvm::SDNode::getVTList(), and llvm::SDNode::ops().

◆ AddNodeIDOpcode()

static void AddNodeIDOpcode ( FoldingSetNodeID ID,
unsigned  OpC 
)
static

AddNodeIDOpcode - Add the node opcode to the NodeID data.

Definition at line 436 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddInteger().

Referenced by AddNodeIDNode().

◆ AddNodeIDOperands() [1/2]

static void AddNodeIDOperands ( FoldingSetNodeID ID,
ArrayRef< SDValue Ops 
)
static

AddNodeIDOperands - Various routines for adding operands to the NodeID data.

Definition at line 447 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddInteger(), llvm::FoldingSetNodeID::AddPointer(), llvm::SDValue::getNode(), and llvm::SDValue::getResNo().

Referenced by AddNodeIDNode().

◆ AddNodeIDOperands() [2/2]

static void AddNodeIDOperands ( FoldingSetNodeID ID,
ArrayRef< SDUse Ops 
)
static

AddNodeIDOperands - Various routines for adding operands to the NodeID data.

Definition at line 456 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddInteger(), llvm::FoldingSetNodeID::AddPointer(), llvm::SDValue::getNode(), and llvm::SDValue::getResNo().

◆ AddNodeIDValueTypes()

static void AddNodeIDValueTypes ( FoldingSetNodeID ID,
SDVTList  VTList 
)
static

AddNodeIDValueTypes - Value type lists are intern'd so we can represent them solely with their pointer.

Definition at line 442 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddPointer(), and llvm::SDVTList::VTs.

Referenced by AddNodeIDNode().

◆ chainLoadsAndStoresForMemcpy()

static void chainLoadsAndStoresForMemcpy ( SelectionDAG DAG,
const SDLoc dl,
SmallVector< SDValue, 32 > &  OutChains,
unsigned  From,
unsigned  To,
SmallVector< SDValue, 16 > &  OutLoadChains,
SmallVector< SDValue, 16 > &  OutStoreChains 
)
static

◆ checkAddrSpaceIsValidForLibcall()

static void checkAddrSpaceIsValidForLibcall ( const TargetLowering TLI,
unsigned  AS 
)
static

◆ checkForCyclesHelper()

static void checkForCyclesHelper ( const SDNode N,
SmallPtrSetImpl< const SDNode *> &  Visited,
SmallPtrSetImpl< const SDNode *> &  Checked,
const llvm::SelectionDAG DAG 
)
static

◆ commuteShuffle()

static void commuteShuffle ( SDValue N1,
SDValue N2,
MutableArrayRef< int >  M 
)
static

Swaps the values of N1 and N2.

Swaps all indices in the shuffle mask M that point at N1 to point at N2 and indices that point at N2 to point at N1.

Definition at line 1562 of file SelectionDAG.cpp.

References llvm::ShuffleVectorSDNode::commuteMask(), and std::swap().

Referenced by llvm::SelectionDAG::getVectorShuffle().

◆ doNotCSE()

static bool doNotCSE ( SDNode N)
static

doNotCSE - Return true if CSE should not be performed for this node.

Definition at line 656 of file SelectionDAG.cpp.

References llvm::numbers::e, llvm::ISD::EH_LABEL, llvm::SDNode::getNumValues(), llvm::SDNode::getOpcode(), llvm::SDNode::getValueType(), llvm::MVT::Glue, and llvm::ISD::HANDLENODE.

Referenced by VerifySDNode().

◆ FoldBUILD_VECTOR()

static SDValue FoldBUILD_VECTOR ( const SDLoc DL,
EVT  VT,
ArrayRef< SDValue Ops,
SelectionDAG DAG 
)
static

◆ foldCONCAT_VECTORS()

static SDValue foldCONCAT_VECTORS ( const SDLoc DL,
EVT  VT,
ArrayRef< SDValue Ops,
SelectionDAG DAG 
)
static

◆ FoldValue()

static std::pair<APInt, bool> FoldValue ( unsigned  Opcode,
const APInt C1,
const APInt C2 
)
static

◆ getMemcpyLoadsAndStores()

static SDValue getMemcpyLoadsAndStores ( SelectionDAG DAG,
const SDLoc dl,
SDValue  Chain,
SDValue  Dst,
SDValue  Src,
uint64_t  Size,
unsigned  Alignment,
bool  isVol,
bool  AlwaysInline,
MachinePointerInfo  DstPtrInfo,
MachinePointerInfo  SrcPtrInfo 
)
static

Definition at line 5758 of file SelectionDAG.cpp.

References llvm::ConstantDataArraySlice::Array, assert(), llvm::EVT::bitsGE(), C, chainLoadsAndStoresForMemcpy(), llvm::dyn_cast(), EnableMemCpyDAGOpt, llvm::DataLayout::exceedsNaturalStackAlignment(), llvm::ISD::EXTLOAD, llvm::TargetLowering::findOptimalMemOpLowering(), llvm::DataLayout::getABITypeAlignment(), llvm::MachinePointerInfo::getAddrSpace(), llvm::Function::getAttributes(), llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getExtLoad(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::FrameIndexSDNode::getIndex(), llvm::SelectionDAG::getMachineFunction(), llvm::TargetLoweringBase::getMaxGluedStoresPerMemcpy(), llvm::TargetLoweringBase::getMaxStoresPerMemcpy(), llvm::SelectionDAG::getMemBasePlusOffset(), getMemsetStringVal(), llvm::SDValue::getNode(), llvm::SelectionDAG::getNode(), llvm::MachineFrameInfo::getObjectAlignment(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::EVT::getSizeInBits(), llvm::SelectionDAG::getStore(), llvm::MachineFunction::getSubtarget(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SelectionDAG::getTruncStore(), llvm::TargetLoweringBase::getTypeToTransformTo(), llvm::SDValue::getValue(), llvm::MachinePointerInfo::getWithOffset(), llvm::SelectionDAG::InferPtrAlignment(), llvm::MachinePointerInfo::isDereferenceable(), llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::EVT::isInteger(), isMemSrcFromConstant(), llvm::SDValue::isUndef(), llvm::EVT::isVector(), llvm::ConstantDataArraySlice::Length, MaxLdStGlue, llvm::MinAlign(), llvm::MachineMemOperand::MODereferenceable, llvm::MachineMemOperand::MONone, llvm::ConstantDataArraySlice::move(), llvm::MachineMemOperand::MOVolatile, llvm::TargetRegisterInfo::needsStackRealignment(), llvm::ConstantDataArraySlice::Offset, llvm::MVT::Other, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::MachineFrameInfo::setObjectAlignment(), shouldLowerMemFuncForSize(), Size, llvm::SmallVectorBase::size(), llvm::SPII::Store, llvm::ISD::TokenFactor, and TRI.

Referenced by llvm::SelectionDAG::getMemcpy().

◆ getMemmoveLoadsAndStores()

static SDValue getMemmoveLoadsAndStores ( SelectionDAG DAG,
const SDLoc dl,
SDValue  Chain,
SDValue  Dst,
SDValue  Src,
uint64_t  Size,
unsigned  Align,
bool  isVol,
bool  AlwaysInline,
MachinePointerInfo  DstPtrInfo,
MachinePointerInfo  SrcPtrInfo 
)
static

◆ getMemsetStores()

static SDValue getMemsetStores ( SelectionDAG DAG,
const SDLoc dl,
SDValue  Chain,
SDValue  Dst,
SDValue  Src,
uint64_t  Size,
unsigned  Align,
bool  isVol,
MachinePointerInfo  DstPtrInfo 
)
static

Lower the call to 'memset' intrinsic function into a series of store operations.

Parameters
DAGSelection DAG where lowered code is placed.
dlLink to corresponding IR location.
ChainControl flow dependency.
DstPointer to destination memory location.
SrcValue of byte to write into the memory.
SizeNumber of bytes to write.
AlignAlignment of the destination in bytes.
isVolTrue if destination is volatile.
DstPtrInfoIR information on the memory pointer.
Returns
New head in the control flow, if lowering was successful, empty SDValue otherwise.

The function tries to replace 'llvm.memset' intrinsic with several store operations and value calculation code. This is usually profitable for small memory size.

Definition at line 6053 of file SelectionDAG.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), llvm::EVT::bitsLT(), llvm::dyn_cast(), llvm::TargetLowering::findOptimalMemOpLowering(), llvm::DataLayout::getABITypeAlignment(), llvm::MachinePointerInfo::getAddrSpace(), llvm::Function::getAttributes(), llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getDataLayout(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::FrameIndexSDNode::getIndex(), llvm::SelectionDAG::getMachineFunction(), llvm::TargetLoweringBase::getMaxStoresPerMemset(), llvm::SelectionDAG::getMemBasePlusOffset(), getMemsetValue(), llvm::SelectionDAG::getNode(), llvm::MachineFrameInfo::getObjectAlignment(), llvm::EVT::getSizeInBits(), llvm::SelectionDAG::getStore(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SDValue::getValueType(), llvm::MachinePointerInfo::getWithOffset(), llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::TargetLoweringBase::isTruncateFree(), llvm::SDValue::isUndef(), llvm::EVT::isVector(), llvm::MachineMemOperand::MONone, llvm::MachineMemOperand::MOVolatile, llvm::MVT::Other, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::MachineFrameInfo::setObjectAlignment(), shouldLowerMemFuncForSize(), Size, llvm::SmallVectorBase::size(), llvm::SPII::Store, llvm::ISD::TokenFactor, and llvm::ISD::TRUNCATE.

Referenced by llvm::SelectionDAG::getMemset().

◆ getMemsetStringVal()

static SDValue getMemsetStringVal ( EVT  VT,
const SDLoc dl,
SelectionDAG DAG,
const TargetLowering TLI,
const ConstantDataArraySlice Slice 
)
static

◆ getMemsetValue()

static SDValue getMemsetValue ( SDValue  Value,
EVT  VT,
SelectionDAG DAG,
const SDLoc dl 
)
static

◆ getValidMinimumShiftAmountConstant()

static const APInt* getValidMinimumShiftAmountConstant ( SDValue  V)
static

If a SHL/SRA/SRL node has constant vector shift amounts that are all less than the element bit-width of the shift node, return the minimum value.

Definition at line 2395 of file SelectionDAG.cpp.

References llvm::dyn_cast(), llvm::numbers::e, llvm::SDValue::getOperand(), llvm::SDValue::getScalarValueSizeInBits(), llvm::APInt::uge(), and llvm::APInt::ule().

Referenced by llvm::SelectionDAG::computeKnownBits().

◆ getValidShiftAmountConstant()

static const APInt* getValidShiftAmountConstant ( SDValue  V)
static

If a SHL/SRA/SRL node has a constant or splat constant shift amount that is less than the element bit-width of the shift node, return it.

Definition at line 2382 of file SelectionDAG.cpp.

References llvm::SDValue::getOperand(), llvm::SDValue::getScalarValueSizeInBits(), llvm::isConstOrConstSplat(), and llvm::APInt::ult().

Referenced by llvm::SelectionDAG::computeKnownBits().

◆ InferPointerInfo() [1/2]

static MachinePointerInfo InferPointerInfo ( const MachinePointerInfo Info,
SelectionDAG DAG,
SDValue  Ptr,
int64_t  Offset = 0 
)
static

InferPointerInfo - If the specified ptr/offset is a frame index, infer a MachinePointerInfo record from it.

This is particularly useful because the code generator has many cases where it doesn't bother passing in a MachinePointerInfo to getLoad or getStore when it has "FI+Cst".

Definition at line 6647 of file SelectionDAG.cpp.

References llvm::ISD::ADD, llvm::MachinePointerInfo::getFixedStack(), llvm::SelectionDAG::getMachineFunction(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), and Info.

Referenced by llvm::SelectionDAG::getLoad(), llvm::SelectionDAG::getStore(), llvm::SelectionDAG::getTruncStore(), and InferPointerInfo().

◆ InferPointerInfo() [2/2]

static MachinePointerInfo InferPointerInfo ( const MachinePointerInfo Info,
SelectionDAG DAG,
SDValue  Ptr,
SDValue  OffsetOp 
)
static

InferPointerInfo - If the specified ptr/offset is a frame index, infer a MachinePointerInfo record from it.

This is particularly useful because the code generator has many cases where it doesn't bother passing in a MachinePointerInfo to getLoad or getStore when it has "FI+Cst".

Definition at line 6671 of file SelectionDAG.cpp.

References InferPointerInfo(), Info, and llvm::SDValue::isUndef().

◆ isMemSrcFromConstant()

static bool isMemSrcFromConstant ( SDValue  Src,
ConstantDataArraySlice Slice 
)
static

◆ isSignedOp()

static int isSignedOp ( ISD::CondCode  Opcode)
static

For an integer comparison, return 1 if the comparison is a signed operation and 2 if the result is an unsigned comparison.

Return zero if the operation does not depend on the sign of the input (setne and seteq).

Definition at line 371 of file SelectionDAG.cpp.

References llvm_unreachable, llvm::ISD::SETEQ, llvm::ISD::SETGE, llvm::ISD::SETGT, llvm::ISD::SETLE, llvm::ISD::SETLT, llvm::ISD::SETNE, llvm::ISD::SETUGE, llvm::ISD::SETUGT, llvm::ISD::SETULE, and llvm::ISD::SETULT.

Referenced by llvm::ISD::getSetCCAndOperation(), and llvm::ISD::getSetCCOrOperation().

◆ makeVTList()

static SDVTList makeVTList ( const EVT VTs,
unsigned  NumVTs 
)
static

makeVTList - Return an instance of the SDVTList struct initialized with the specified members.

Definition at line 80 of file SelectionDAG.cpp.

Referenced by llvm::SelectionDAG::getVTList().

◆ NewSDValueDbgMsg()

static void NewSDValueDbgMsg ( SDValue  V,
StringRef  Msg,
SelectionDAG G 
)
static

◆ shouldLowerMemFuncForSize()

static bool shouldLowerMemFuncForSize ( const MachineFunction MF)
static

◆ VerifySDNode()

static void VerifySDNode ( SDNode N)
static

Variable Documentation

◆ EnableMemCpyDAGOpt

cl::opt<bool> EnableMemCpyDAGOpt("enable-memcpy-dag-opt", cl::Hidden, cl::init(true), cl::desc("Gang up loads and stores generated by inlining of memcpy"))
static

Referenced by getMemcpyLoadsAndStores().

◆ EVTs

ManagedStatic<std::set<EVT, EVT::compareRawBits> > EVTs
static

Definition at line 8857 of file SelectionDAG.cpp.

◆ MaxLdStGlue

cl::opt<int> MaxLdStGlue("ldstmemcpy-glue-max", cl::desc("Number limit for gluing ld/st of memcpy."), cl::Hidden, cl::init(0))
static

Referenced by getMemcpyLoadsAndStores().

◆ SimpleVTArray

ManagedStatic<EVTArray> SimpleVTArray
static

Definition at line 8858 of file SelectionDAG.cpp.

◆ VTMutex

ManagedStatic<sys::SmartMutex<true> > VTMutex
static

Definition at line 8859 of file SelectionDAG.cpp.