WebAssemblyISelLowering.cpp File Reference

#include "WebAssemblyISelLowering.h"
#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "Utils/WebAssemblyTypeUtilities.h"
#include "Utils/WebAssemblyUtilities.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyTargetMachine.h"
#include "llvm/CodeGen/CallingConvLower.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/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"

Include dependency graph for WebAssemblyISelLowering.cpp:

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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 Optional< unsigned >	IsWebAssemblyLocal (SDValue Op, SelectionDAG &DAG)
static bool	IsWebAssemblyTable (SDValue Op)
static bool	IsWebAssemblyTableWithOffset (SDValue Op)
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	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)

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 41 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;

Function Documentation

callingConvSupported()

static bool callingConvSupported ( CallingConv::ID  CallConv )

static

Definition at line 927 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 2614 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 truncateVectorWithNARROW().

fail()

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

static

Definition at line 920 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 1423 of file WebAssemblyISelLowering.cpp.

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

IsWebAssemblyLocal()

static Optional<unsigned> IsWebAssemblyLocal ( SDValue  Op, SelectionDAG &  DAG  )

static

Definition at line 1430 of file WebAssemblyISelLowering.cpp.

References llvm::FrameIndexSDNode::getIndex(), llvm::WebAssemblyFrameLowering::getLocalForStackObject(), llvm::SelectionDAG::getMachineFunction(), and llvm::None.

IsWebAssemblyTable()

static bool IsWebAssemblyTable ( SDValue  Op )

static

Definition at line 1439 of file WebAssemblyISelLowering.cpp.

References llvm::GlobalAddressSDNode::getAddressSpace(), llvm::Type::getArrayElementType(), llvm::GlobalAddressSDNode::getGlobal(), llvm::Type::isArrayTy(), llvm::WebAssembly::isRefType(), and llvm::WebAssembly::isWasmVarAddressSpace().

Referenced by IsWebAssemblyTableWithOffset().

IsWebAssemblyTableWithOffset()

static bool IsWebAssemblyTableWithOffset ( SDValue  Op )

static

Definition at line 1453 of file WebAssemblyISelLowering.cpp.

References llvm::ISD::ADD, llvm::MVT::i32, and IsWebAssemblyTable().

LowerCallResults()

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

static

Definition at line 527 of file WebAssemblyISelLowering.cpp.

References llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstr::addOperand(), llvm::MachineInstrBuilder::addReg(), llvm::MachineInstrBuilder::addSym(), assert(), BB, llvm::BuildMI(), llvm::AArch64ISD::CALL, llvm::MachineFunction::CreateMachineInstr(), llvm::MachineRegisterInfo::createVirtualRegister(), llvm::tgtok::Def, 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::ilist_node_with_parent< NodeTy, ParentTy, Options >::getPrevNode(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getRegClass(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::WebAssemblySubtarget::hasAddr64(), llvm::WebAssemblySubtarget::hasReferenceTypes(), 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 1962 of file WebAssemblyISelLowering.cpp.

References DL, llvm::ISD::EXTRACT_VECTOR_ELT, llvm::ISD::FP_EXTEND, llvm::SelectionDAG::getNode(), llvm::SDValue::getValueType(), llvm::SelectionDAG::getVectorShuffle(), Index, llvm::ISD::SINT_TO_FP, llvm::ISD::UINT_TO_FP, llvm::MVT::v2f64, llvm::MVT::v4f32, and llvm::MVT::v4i32.

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 433 of file WebAssemblyISelLowering.cpp.

References llvm::MachineInstrBuilder::addFPImm(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMBB(), llvm::MachineInstrBuilder::addReg(), llvm::MachineBasicBlock::addSuccessor(), llvm::And, BB, llvm::MachineBasicBlock::begin(), llvm::ISD::BR, llvm::BuildMI(), Context, llvm::MachineRegisterInfo::createVirtualRegister(), DL, double, F, llvm::AArch64CC::GE, llvm::ConstantFP::get(), llvm::Type::getDoubleTy(), llvm::Type::getFloatTy(), llvm::MachineRegisterInfo::getRegClass(), INT64_MIN, llvm::AArch64CC::LT, MI, MRI, llvm::MachineBasicBlock::splice(), TII, and llvm::MachineBasicBlock::transferSuccessorsAndUpdatePHIs().

performTruncateCombine()

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

static

Definition at line 2694 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::MVT::i16, llvm::MVT::i32, llvm::MVT::i64, llvm::MVT::i8, llvm::tgtok::In, llvm::EVT::is128BitVector(), llvm::EVT::isSimple(), llvm::EVT::isVector(), llvm::BitmaskEnumDetail::Mask(), N, and truncateVectorWithNARROW().

performVECTOR_SHUFFLECombine()

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

static

Definition at line 2423 of file WebAssemblyISelLowering.cpp.

References llvm::LegacyLegalizeActions::Bitcast, llvm::ISD::BITCAST, llvm::TargetLowering::DAGCombinerInfo::DAG, llvm::SelectionDAG::getBitcast(), llvm::SDValue::getSimpleValueType(), llvm::SelectionDAG::getUNDEF(), llvm::MVT::getVectorNumElements(), llvm::SelectionDAG::getVectorShuffle(), llvm::MVT::is128BitVector(), and N.

performVectorExtendCombine()

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

static

Definition at line 2448 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(), Index, N, llvm::ISD::SIGN_EXTEND, llvm::Sched::Source, llvm::MVT::v16i8, llvm::MVT::v2i32, llvm::MVT::v2i64, llvm::MVT::v4i16, llvm::MVT::v4i32, llvm::MVT::v8i16, llvm::MVT::v8i8, and llvm::ISD::ZERO_EXTEND.

performVectorTruncZeroCombine()

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

static

Definition at line 2495 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, llvm::Sched::Source, llvm::MVT::v2f32, llvm::MVT::v2f64, llvm::MVT::v2i32, llvm::MVT::v4f32, llvm::MVT::v4f64, and llvm::MVT::v4i32.

truncateVectorWithNARROW()

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

static

Definition at line 2643 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::MipsISD::Hi, llvm::MVT::i16, llvm::MVT::i32, llvm::MVT::i8, llvm::tgtok::In, llvm::EVT::is128BitVector(), llvm::EVT::is256BitVector(), llvm::isPowerOf2_32(), and llvm::MipsISD::Lo.

Referenced by performTruncateCombine().

unrollVectorShift()

static SDValue unrollVectorShift ( SDValue  Op, SelectionDAG &  DAG  )

static

Definition at line 2343 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(), i, llvm::MVT::i32, llvm::BitmaskEnumDetail::Mask(), llvm::ISD::SIGN_EXTEND_INREG, llvm::ISD::SRA, and llvm::SelectionDAG::UnrollVectorOp().