LLVM  6.0.0svn
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/MachineValueType.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
#include "llvm/CodeGen/SelectionDAGAddressAnalysis.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/SelectionDAGTargetInfo.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/ManagedStatic.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.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 SDValue FoldCONCAT_VECTORS (const SDLoc &DL, EVT VT, ArrayRef< SDValue > Ops, SelectionDAG &DAG)
 
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 FindOptimalMemOpLowering (std::vector< EVT > &MemOps, unsigned Limit, uint64_t Size, unsigned DstAlign, unsigned SrcAlign, bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, bool AllowOverlap, unsigned DstAS, unsigned SrcAS, SelectionDAG &DAG, const TargetLowering &TLI)
 Determines the optimal series of memory ops to replace the memset / memcpy. More...
 
static bool shouldLowerMemFuncForSize (const MachineFunction &MF)
 
static SDValue getMemcpyLoadsAndStores (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 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 (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 (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 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 90 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 408 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_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::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::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_unreachable, llvm::ISD::LOAD, llvm::ISD::MCSymbol, 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 540 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 372 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 383 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddInteger(), and llvm::FoldingSetNodeID::AddPointer().

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 392 of file SelectionDAG.cpp.

References llvm::FoldingSetNodeID::AddInteger(), and llvm::FoldingSetNodeID::AddPointer().

◆ 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 378 of file SelectionDAG.cpp.

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

Referenced by AddNodeIDNode().

◆ 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 1470 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 556 of file SelectionDAG.cpp.

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

Referenced by VerifySDNode().

◆ FindOptimalMemOpLowering()

static bool FindOptimalMemOpLowering ( std::vector< EVT > &  MemOps,
unsigned  Limit,
uint64_t  Size,
unsigned  DstAlign,
unsigned  SrcAlign,
bool  IsMemset,
bool  ZeroMemset,
bool  MemcpyStrSrc,
bool  AllowOverlap,
unsigned  DstAS,
unsigned  SrcAS,
SelectionDAG DAG,
const TargetLowering TLI 
)
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  Align,
bool  isVol,
bool  AlwaysInline,
MachinePointerInfo  DstPtrInfo,
MachinePointerInfo  SrcPtrInfo 
)
static

Definition at line 5037 of file SelectionDAG.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, llvm::ConstantDataArraySlice::Array, assert(), llvm::EVT::bitsGE(), C, llvm::dyn_cast(), llvm::DataLayout::exceedsNaturalStackAlignment(), llvm::ISD::EXTLOAD, FindOptimalMemOpLowering(), llvm::DataLayout::getABITypeAlignment(), llvm::MachinePointerInfo::getAddrSpace(), llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getDataLayout(), llvm::SelectionDAG::getExtLoad(), llvm::MachineFunction::getFrameInfo(), llvm::FrameIndexSDNode::getIndex(), llvm::SelectionDAG::getMachineFunction(), 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, 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, isPodLike< T >::value >::push_back(), llvm::MachineFrameInfo::setObjectAlignment(), shouldLowerMemFuncForSize(), llvm::SmallVectorTemplateCommon< T, typename >::size(), llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Size, llvm::SPII::Store, and llvm::ISD::TokenFactor.

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 5282 of file SelectionDAG.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), llvm::EVT::bitsLT(), llvm::dyn_cast(), FindOptimalMemOpLowering(), llvm::MachinePointerInfo::getAddrSpace(), llvm::MachineFunction::getFrameInfo(), llvm::FrameIndexSDNode::getIndex(), llvm::SelectionDAG::getMachineFunction(), llvm::TargetLoweringBase::getMaxStoresPerMemset(), getMemsetValue(), llvm::SDValue::getNode(), llvm::MachineFrameInfo::getObjectAlignment(), llvm::EVT::getSizeInBits(), 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, isPodLike< T >::value >::push_back(), llvm::MachineFrameInfo::setObjectAlignment(), shouldLowerMemFuncForSize(), llvm::SmallVectorTemplateCommon< T, typename >::size(), llvm::AMDGPU::HSAMD::Kernel::Arg::Key::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

◆ 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 2061 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 ( 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 5773 of file SelectionDAG.cpp.

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

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

◆ InferPointerInfo() [2/2]

static MachinePointerInfo InferPointerInfo ( 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 5796 of file SelectionDAG.cpp.

References InferPointerInfo(), 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 307 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 81 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

◆ EVTs

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

Definition at line 7555 of file SelectionDAG.cpp.

Referenced by pickOpcodeForVT().

◆ SimpleVTArray

ManagedStatic<EVTArray> SimpleVTArray
static

Definition at line 7556 of file SelectionDAG.cpp.

◆ VTMutex

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

Definition at line 7557 of file SelectionDAG.cpp.