LLVM 18.0.0git
Macros | Functions
WebAssemblyISelLowering.cpp File Reference

This file implements the WebAssemblyTargetLowering class. More...

#include "WebAssemblyISelLowering.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "Utils/WebAssemblyTypeUtilities.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyTargetMachine.h"
#include "WebAssemblyUtilities.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/DiagnosticPrinter.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/IntrinsicsWebAssembly.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetOptions.h"
#include "WebAssemblyISD.def"

Go to the source code of this file.

Macros

#define DEBUG_TYPE   "wasm-lower"
 
#define HANDLE_NODETYPE(NODE)
 
#define HANDLE_MEM_NODETYPE(NODE)   HANDLE_NODETYPE(NODE)
 

Functions

static MachineBasicBlock * LowerFPToInt (MachineInstr &MI, DebugLoc DL, MachineBasicBlock *BB, const TargetInstrInfo &TII, bool IsUnsigned, bool Int64, bool Float64, unsigned LoweredOpcode)
 
static MachineBasicBlock * LowerCallResults (MachineInstr &CallResults, DebugLoc DL, MachineBasicBlock *BB, const WebAssemblySubtarget *Subtarget, const TargetInstrInfo &TII)
 
static void fail (const SDLoc &DL, SelectionDAG &DAG, const char *Msg)
 
static bool callingConvSupported (CallingConv::ID CallConv)
 
static bool IsWebAssemblyGlobal (SDValue Op)
 
static std::optional< unsigned > IsWebAssemblyLocal (SDValue Op, SelectionDAG &DAG)
 
static SDValue LowerConvertLow (SDValue Op, SelectionDAG &DAG)
 
static SDValue unrollVectorShift (SDValue Op, SelectionDAG &DAG)
 
static SDValue performVECTOR_SHUFFLECombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 
static SDValue performVectorExtendToFPCombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 Convert ({u,s}itofp vec) --> ({u,s}itofp ({s,z}ext vec)) so it doesn't get split up into scalar instructions during legalization, and the vector extending instructions are selected in performVectorExtendCombine below.
 
static SDValue performVectorExtendCombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 
static SDValue performVectorTruncZeroCombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 
static SDValue extractSubVector (SDValue Vec, unsigned IdxVal, SelectionDAG &DAG, const SDLoc &DL, unsigned VectorWidth)
 
static SDValue truncateVectorWithNARROW (EVT DstVT, SDValue In, const SDLoc &DL, SelectionDAG &DAG)
 
static SDValue performTruncateCombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 
static SDValue performBitcastCombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 
static SDValue performSETCCCombine (SDNode *N, TargetLowering::DAGCombinerInfo &DCI)
 

Detailed Description

This file implements the WebAssemblyTargetLowering class.

Definition in file WebAssemblyISelLowering.cpp.

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "wasm-lower"

Definition at line 44 of file WebAssemblyISelLowering.cpp.

◆ HANDLE_MEM_NODETYPE

#define HANDLE_MEM_NODETYPE (   NODE)    HANDLE_NODETYPE(NODE)

◆ HANDLE_NODETYPE

#define HANDLE_NODETYPE (   NODE)
Value:
case WebAssemblyISD::NODE: \
return "WebAssemblyISD::" #NODE;
NODE
#define NODE(NodeKind)
Definition: ItaniumDemangle.h:2601

Function Documentation

◆ callingConvSupported()

static bool callingConvSupported ( CallingConv::ID  CallConv)
static

Definition at line 992 of file WebAssemblyISelLowering.cpp.

References llvm::CallingConv::C, llvm::CallingConv::Cold, llvm::CallingConv::CXX_FAST_TLS, llvm::CallingConv::Fast, llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::CallingConv::Swift, and llvm::CallingConv::WASM_EmscriptenInvoke.

◆ extractSubVector()

static SDValue extractSubVector ( SDValue  Vec,
unsigned  IdxVal,
SelectionDAG &  DAG,
const SDLoc &  DL,
unsigned  VectorWidth 
)
static

Definition at line 2680 of file WebAssemblyISelLowering.cpp.

References assert(), llvm::ISD::BUILD_VECTOR, DL, llvm::ISD::EXTRACT_SUBVECTOR, llvm::SelectionDAG::getBuildVector(), llvm::SelectionDAG::getContext(), llvm::SelectionDAG::getIntPtrConstant(), llvm::SelectionDAG::getNode(), llvm::SDValue::getOpcode(), llvm::EVT::getSizeInBits(), llvm::SDValue::getValueType(), llvm::EVT::getVectorElementType(), llvm::EVT::getVectorNumElements(), llvm::EVT::getVectorVT(), llvm::isPowerOf2_32(), and llvm::SDNode::ops().

Referenced by combineBROADCAST_LOAD(), combineConcatVectorOps(), combineEXTRACT_SUBVECTOR(), combineLoad(), combineOr(), combineScalarToVector(), combineSelect(), combineTargetShuffle(), combineX86ShuffleChain(), combineX86ShuffleChainWithExtract(), createVariablePermute(), extract128BitVector(), extract256BitVector(), getAVX512Node(), getAVX512TruncNode(), getEXTEND_VECTOR_INREG(), getHopForBuildVector(), lowerBuildVectorAsBroadcast(), LowerEXTEND_VECTOR_INREG(), lowerShuffleWithPERMV(), llvm::X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode(), SplitOpsAndApply(), splitVector(), truncateVectorWithNARROW(), and truncateVectorWithPACK().

◆ fail()

static void fail ( const SDLoc &  DL,
SelectionDAG &  DAG,
const char *  Msg 
)
static

Definition at line 985 of file WebAssemblyISelLowering.cpp.

References llvm::LLVMContext::diagnose(), DL, llvm::SelectionDAG::getContext(), llvm::MachineFunction::getFunction(), and llvm::SelectionDAG::getMachineFunction().

◆ IsWebAssemblyGlobal()

static bool IsWebAssemblyGlobal ( SDValue  Op)
static

Definition at line 1496 of file WebAssemblyISelLowering.cpp.

References llvm::GlobalAddressSDNode::getAddressSpace(), and llvm::WebAssembly::isWasmVarAddressSpace().

◆ IsWebAssemblyLocal()

static std::optional< unsigned > IsWebAssemblyLocal ( SDValue  Op,
SelectionDAG &  DAG 
)
static

Definition at line 1503 of file WebAssemblyISelLowering.cpp.

References llvm::FrameIndexSDNode::getIndex(), llvm::WebAssemblyFrameLowering::getLocalForStackObject(), and llvm::SelectionDAG::getMachineFunction().

◆ LowerCallResults()

static MachineBasicBlock * LowerCallResults ( MachineInstr &  CallResults,
DebugLoc  DL,
MachineBasicBlock *  BB,
const WebAssemblySubtarget *  Subtarget,
const TargetInstrInfo &  TII 
)
static

Definition at line 542 of file WebAssemblyISelLowering.cpp.

References llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstr::addOperand(), llvm::MachineInstrBuilder::addReg(), llvm::MachineInstrBuilder::addSym(), assert(), llvm::BuildMI(), llvm::MachineFunction::CreateMachineInstr(), llvm::MachineRegisterInfo::createVirtualRegister(), llvm::MachineInstr::defs(), DL, llvm::MachineInstr::eraseFromParent(), llvm::MachineFunction::getContext(), llvm::MachineInstrBuilder::getInstr(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::WebAssembly::getOrCreateFuncrefCallTableSymbol(), llvm::WebAssembly::getOrCreateFunctionTableSymbol(), llvm::MachineBasicBlock::getParent(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getPrevNode(), llvm::MachineOperand::getReg(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::WebAssemblySubtarget::hasAddr64(), llvm::WebAssemblySubtarget::hasReferenceTypes(), llvm::MachineBasicBlock::insert(), llvm::MachineBasicBlock::insertAfter(), llvm::MachineOperand::isFI(), llvm::MachineOperand::isReg(), MRI, llvm::MachineInstr::removeOperand(), llvm::MCSymbolWasm::setNoStrip(), TII, and llvm::MachineInstr::uses().

◆ LowerConvertLow()

static SDValue LowerConvertLow ( SDValue  Op,
SelectionDAG &  DAG 
)
static

Definition at line 1970 of file WebAssemblyISelLowering.cpp.

References DL, llvm::ISD::EXTRACT_VECTOR_ELT, llvm::ISD::FP_EXTEND, llvm::SelectionDAG::getNode(), llvm::SDValue::getValueType(), llvm::SelectionDAG::getVectorShuffle(), Opcode, llvm::ISD::SINT_TO_FP, and llvm::ISD::UINT_TO_FP.

◆ LowerFPToInt()

static MachineBasicBlock * LowerFPToInt ( MachineInstr &  MI,
DebugLoc  DL,
MachineBasicBlock *  BB,
const TargetInstrInfo &  TII,
bool  IsUnsigned,
bool  Int64,
bool  Float64,
unsigned  LoweredOpcode 
)
static

Definition at line 448 of file WebAssemblyISelLowering.cpp.

References llvm::MachineInstrBuilder::addFPImm(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMBB(), llvm::MachineInstrBuilder::addReg(), llvm::MachineBasicBlock::addSuccessor(), llvm::And, llvm::MachineBasicBlock::begin(), llvm::BuildMI(), Context, DL, llvm::MachineBasicBlock::end(), F, llvm::ConstantFP::get(), llvm::MachineBasicBlock::getBasicBlock(), llvm::Function::getContext(), llvm::Type::getDoubleTy(), llvm::Type::getFloatTy(), llvm::MachineFunction::getFunction(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), Int64, INT64_MIN, MI, MRI, llvm::MachineBasicBlock::splice(), TII, and llvm::MachineBasicBlock::transferSuccessorsAndUpdatePHIs().

◆ performBitcastCombine()

static SDValue performBitcastCombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Definition at line 2787 of file WebAssemblyISelLowering.cpp.

References llvm::TargetLowering::DAGCombinerInfo::DAG, DL, llvm::MVT::getIntegerVT(), llvm::SelectionDAG::getNode(), llvm::EVT::getScalarType(), llvm::EVT::getVectorNumElements(), llvm::SelectionDAG::getZExtOrTrunc(), llvm::ISD::INTRINSIC_WO_CHAIN, llvm::TargetLowering::DAGCombinerInfo::isBeforeLegalize(), llvm::EVT::isFixedLengthVector(), llvm::EVT::isScalarInteger(), and N.

◆ performSETCCCombine()

static SDValue performSETCCCombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Definition at line 2814 of file WebAssemblyISelLowering.cpp.

References llvm::ISD::BITCAST, Cond, llvm::TargetLowering::DAGCombinerInfo::DAG, DL, llvm::MVT::getIntegerVT(), llvm::SelectionDAG::getNode(), llvm::SelectionDAG::getNOT(), llvm::EVT::getVectorElementType(), llvm::EVT::getVectorNumElements(), llvm::SelectionDAG::getZExtOrTrunc(), llvm::ISD::INTRINSIC_WO_CHAIN, llvm::isAllOnesConstant(), llvm::TargetLowering::DAGCombinerInfo::isBeforeLegalize(), llvm::EVT::isFixedLengthVector(), llvm::isNullConstant(), llvm::EVT::isScalarInteger(), LHS, N, RHS, llvm::ISD::SETEQ, and llvm::ISD::SETNE.

◆ performTruncateCombine()

static SDValue performTruncateCombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Definition at line 2760 of file WebAssemblyISelLowering.cpp.

References llvm::ISD::AND, llvm::TargetLowering::DAGCombinerInfo::DAG, DL, llvm::SelectionDAG::getConstant(), llvm::APInt::getLowBitsSet(), llvm::SelectionDAG::getNode(), llvm::EVT::getScalarSizeInBits(), llvm::EVT::getVectorElementType(), llvm::EVT::is128BitVector(), llvm::EVT::isSimple(), llvm::EVT::isVector(), N, and truncateVectorWithNARROW().

◆ performVECTOR_SHUFFLECombine()

static SDValue performVECTOR_SHUFFLECombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Definition at line 2461 of file WebAssemblyISelLowering.cpp.

References llvm::ISD::BITCAST, llvm::TargetLowering::DAGCombinerInfo::DAG, llvm::SelectionDAG::getBitcast(), llvm::SelectionDAG::getUNDEF(), llvm::SDValue::getValueType(), llvm::EVT::getVectorNumElements(), llvm::SelectionDAG::getVectorShuffle(), llvm::EVT::is128BitVector(), and N.

◆ performVectorExtendCombine()

static SDValue performVectorExtendCombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Definition at line 2512 of file WebAssemblyISelLowering.cpp.

References assert(), llvm::TargetLowering::DAGCombinerInfo::DAG, llvm::ISD::EXTRACT_SUBVECTOR, llvm::SelectionDAG::getNode(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::SDValue::getValueType(), N, llvm::ISD::SIGN_EXTEND, and llvm::ISD::ZERO_EXTEND.

◆ performVectorExtendToFPCombine()

static SDValue performVectorExtendToFPCombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Convert ({u,s}itofp vec) --> ({u,s}itofp ({s,z}ext vec)) so it doesn't get split up into scalar instructions during legalization, and the vector extending instructions are selected in performVectorExtendCombine below.

Definition at line 2489 of file WebAssemblyISelLowering.cpp.

References assert(), llvm::TargetLowering::DAGCombinerInfo::DAG, llvm::SelectionDAG::getNode(), N, llvm::ISD::SIGN_EXTEND, llvm::ISD::SINT_TO_FP, llvm::ISD::UINT_TO_FP, and llvm::ISD::ZERO_EXTEND.

◆ performVectorTruncZeroCombine()

static SDValue performVectorTruncZeroCombine ( SDNode *  N,
TargetLowering::DAGCombinerInfo &  DCI 
)
static

Definition at line 2559 of file WebAssemblyISelLowering.cpp.

References Concat, llvm::ISD::CONCAT_VECTORS, Conversion, llvm::TargetLowering::DAGCombinerInfo::DAG, llvm::ISD::FP_ROUND, llvm::ISD::FP_TO_SINT_SAT, llvm::ISD::FP_TO_UINT_SAT, llvm::SelectionDAG::getNode(), llvm_unreachable, N, and llvm::Splat.

◆ truncateVectorWithNARROW()

static SDValue truncateVectorWithNARROW ( EVT  DstVT,
SDValue  In,
const SDLoc &  DL,
SelectionDAG &  DAG 
)
static

Definition at line 2709 of file WebAssemblyISelLowering.cpp.

References assert(), llvm::ISD::CONCAT_VECTORS, DL, extractSubVector(), llvm::SelectionDAG::getBitcast(), llvm::SelectionDAG::getContext(), llvm::EVT::getIntegerVT(), llvm::SelectionDAG::getNode(), llvm::EVT::getScalarSizeInBits(), llvm::EVT::getSizeInBits(), llvm::EVT::getVectorNumElements(), llvm::EVT::getVectorVT(), llvm::Hi, llvm::EVT::is128BitVector(), llvm::EVT::is256BitVector(), llvm::isPowerOf2_32(), llvm::Lo, and truncateVectorWithNARROW().

Referenced by performTruncateCombine(), and truncateVectorWithNARROW().

◆ unrollVectorShift()

static SDValue unrollVectorShift ( SDValue  Op,
SelectionDAG &  DAG 
)
static

Definition at line 2348 of file WebAssemblyISelLowering.cpp.

References llvm::ISD::AND, llvm::EVT::bitsGE(), DL, llvm::SelectionDAG::ExtractVectorElements(), llvm::SelectionDAG::getBuildVector(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getNode(), llvm::EVT::getSizeInBits(), llvm::SelectionDAG::getValueType(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::ISD::SIGN_EXTEND_INREG, llvm::ISD::SRA, and llvm::SelectionDAG::UnrollVectorOp().

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