LLVM 20.0.0git
Functions | Variables
RISCVFrameLowering.cpp File Reference
#include "RISCVFrameLowering.h"
#include "RISCVMachineFunctionInfo.h"
#include "RISCVSubtarget.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/Support/LEB128.h"
#include <algorithm>

Go to the source code of this file.

Functions

static Align getABIStackAlignment (RISCVABI::ABI ABI)
 
static void emitSCSPrologue (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const DebugLoc &DL)
 
static void emitSCSEpilogue (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const DebugLoc &DL)
 
static int getLibCallID (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static const char * getSpillLibCallName (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static const char * getRestoreLibCallName (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static std::pair< unsigned, unsigned > getPushPopEncodingAndNum (const Register MaxReg)
 
static Register getMaxPushPopReg (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static SmallVector< CalleeSavedInfo, 8 > getUnmanagedCSI (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static SmallVector< CalleeSavedInfo, 8 > getRVVCalleeSavedInfo (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static SmallVector< CalleeSavedInfo, 8 > getPushOrLibCallsSavedInfo (const MachineFunction &MF, const std::vector< CalleeSavedInfo > &CSI)
 
static void appendScalableVectorExpression (const TargetRegisterInfo &TRI, SmallVectorImpl< char > &Expr, int FixedOffset, int ScalableOffset, llvm::raw_string_ostream &Comment)
 
static MCCFIInstruction createDefCFAExpression (const TargetRegisterInfo &TRI, Register Reg, uint64_t FixedOffset, uint64_t ScalableOffset)
 
static MCCFIInstruction createDefCFAOffset (const TargetRegisterInfo &TRI, Register Reg, uint64_t FixedOffset, uint64_t ScalableOffset)
 
static unsigned getScavSlotsNumForRVV (MachineFunction &MF)
 
static bool hasRVVFrameObject (const MachineFunction &MF)
 
static unsigned estimateFunctionSizeInBytes (const MachineFunction &MF, const RISCVInstrInfo &TII)
 
static unsigned getCalleeSavedRVVNumRegs (const Register &BaseReg)
 
static MCRegister getRVVBaseRegister (const RISCVRegisterInfo &TRI, const Register &Reg)
 
static void emitStackProbeInline (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, DebugLoc DL, Register TargetReg, bool IsRVV)
 

Variables

static constexpr Register FPReg = RISCV::X8
 
static constexpr Register SPReg = RISCV::X2
 
static constexpr Register RAReg = RISCV::X1
 
static const std::pair< MCPhysReg, int8_t > FixedCSRFIMap []
 

Function Documentation

◆ appendScalableVectorExpression()

static void appendScalableVectorExpression ( const TargetRegisterInfo &  TRI,
SmallVectorImpl< char > &  Expr,
int  FixedOffset,
int  ScalableOffset,
llvm::raw_string_ostream &  Comment 
)
static

Definition at line 559 of file RISCVFrameLowering.cpp.

References llvm::SmallVectorImpl< T >::append(), llvm::encodeSLEB128(), llvm::encodeULEB128(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and TRI.

Referenced by createDefCFAExpression(), and createDefCFAOffset().

◆ createDefCFAExpression()

static MCCFIInstruction createDefCFAExpression ( const TargetRegisterInfo &  TRI,
Register  Reg,
uint64_t  FixedOffset,
uint64_t  ScalableOffset 
)
static

Definition at line 586 of file RISCVFrameLowering.cpp.

References llvm::SmallString< InternalLen >::append(), appendScalableVectorExpression(), assert(), llvm::MCCFIInstruction::createEscape(), llvm::encodeULEB128(), llvm::printReg(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorBase< Size_T >::size(), SPReg, llvm::SmallString< InternalLen >::str(), and TRI.

◆ createDefCFAOffset()

static MCCFIInstruction createDefCFAOffset ( const TargetRegisterInfo &  TRI,
Register  Reg,
uint64_t  FixedOffset,
uint64_t  ScalableOffset 
)
static

Definition at line 616 of file RISCVFrameLowering.cpp.

References llvm::SmallString< InternalLen >::append(), appendScalableVectorExpression(), assert(), llvm::MCCFIInstruction::createEscape(), llvm::encodeULEB128(), llvm::printReg(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorBase< Size_T >::size(), llvm::SmallString< InternalLen >::str(), and TRI.

◆ emitSCSEpilogue()

static void emitSCSEpilogue ( MachineFunction &  MF,
MachineBasicBlock &  MBB,
MachineBasicBlock::iterator  MI,
const DebugLoc &  DL 
)
static

Definition at line 192 of file RISCVFrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MCCFIInstruction::createRestore(), llvm::RegState::Define, DL, llvm::MachineInstr::FrameDestroy, llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::CalleeSavedInfo::getReg(), llvm::RISCVABI::getSCSPReg(), llvm::MachineFunction::getSubtarget(), llvm::Function::hasFnAttribute(), MBB, MI, llvm::none_of(), RAReg, llvm::MachineInstrBuilder::setMIFlag(), llvm::MachineInstrBuilder::setMIFlags(), and TII.

Referenced by llvm::RISCVFrameLowering::emitEpilogue().

◆ emitSCSPrologue()

static void emitSCSPrologue ( MachineFunction &  MF,
MachineBasicBlock &  MBB,
MachineBasicBlock::iterator  MI,
const DebugLoc &  DL 
)
static

Definition at line 126 of file RISCVFrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MCCFIInstruction::createEscape(), llvm::RegState::Define, DL, llvm::MachineInstr::FrameSetup, llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::CalleeSavedInfo::getReg(), llvm::RISCVABI::getSCSPReg(), llvm::MachineFunction::getSubtarget(), llvm::Function::hasFnAttribute(), MBB, MI, llvm::none_of(), llvm::Offset, RAReg, llvm::MachineInstrBuilder::setMIFlag(), TII, and TRI.

Referenced by llvm::RISCVFrameLowering::emitPrologue().

◆ emitStackProbeInline()

static void emitStackProbeInline ( MachineFunction &  MF,
MachineBasicBlock &  MBB,
MachineBasicBlock::iterator  MBBI,
DebugLoc  DL,
Register  TargetReg,
bool  IsRVV 
)
static

Definition at line 2126 of file RISCVFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMBB(), llvm::MachineInstrBuilder::addReg(), llvm::MachineBasicBlock::addSuccessor(), assert(), llvm::BuildMI(), llvm::MachineFunction::CreateMachineBasicBlock(), DL, llvm::MachineBasicBlock::end(), llvm::MachineInstr::FrameSetup, llvm::fullyRecomputeLiveIns(), llvm::MachineBasicBlock::getBasicBlock(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::RISCVTargetLowering::getStackProbeSize(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::insert(), MBB, MBBI, llvm::MachineInstrBuilder::setMIFlags(), llvm::MachineBasicBlock::splice(), SPReg, TII, and llvm::MachineBasicBlock::transferSuccessorsAndUpdatePHIs().

◆ estimateFunctionSizeInBytes()

static unsigned estimateFunctionSizeInBytes ( const MachineFunction &  MF,
const RISCVInstrInfo &  TII 
)
static

Definition at line 1557 of file RISCVFrameLowering.cpp.

References llvm::MachineFunction::getSubtarget(), llvm::RISCVSubtarget::hasStdExtCOrZca(), MBB, MI, and TII.

◆ getABIStackAlignment()

static Align getABIStackAlignment ( RISCVABI::ABI  ABI)
static

Definition at line 89 of file RISCVFrameLowering.cpp.

References llvm::RISCVABI::ABI_ILP32E, and llvm::RISCVABI::ABI_LP64E.

◆ getCalleeSavedRVVNumRegs()

static unsigned getCalleeSavedRVVNumRegs ( const Register &  BaseReg)
static

Definition at line 1910 of file RISCVFrameLowering.cpp.

◆ getLibCallID()

static int getLibCallID ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 246 of file RISCVFrameLowering.cpp.

References FPReg, llvm::CalleeSavedInfo::getFrameIdx(), llvm::MachineFunction::getInfo(), llvm::CalleeSavedInfo::getReg(), llvm::Register::id(), llvm_unreachable, and RAReg.

Referenced by llvm::RISCVFrameLowering::assignCalleeSavedSpillSlots(), llvm::RISCVFrameLowering::emitEpilogue(), llvm::RISCVFrameLowering::emitPrologue(), getRestoreLibCallName(), and getSpillLibCallName().

◆ getMaxPushPopReg()

static Register getMaxPushPopReg ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 373 of file RISCVFrameLowering.cpp.

References assert(), llvm::find_if(), FixedCSRFIMap, llvm::CalleeSavedInfo::getReg(), llvm::Register::id(), and P.

Referenced by llvm::RISCVFrameLowering::assignCalleeSavedSpillSlots().

◆ getPushOrLibCallsSavedInfo()

static SmallVector< CalleeSavedInfo, 8 > getPushOrLibCallsSavedInfo ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 484 of file RISCVFrameLowering.cpp.

References llvm::find_if(), FixedCSRFIMap, llvm::MachineFunction::getInfo(), llvm::CalleeSavedInfo::getReg(), and P.

Referenced by llvm::RISCVFrameLowering::emitEpilogue(), and llvm::RISCVFrameLowering::emitPrologue().

◆ getPushPopEncodingAndNum()

static std::pair< unsigned, unsigned > getPushPopEncodingAndNum ( const Register  MaxReg)
static

Definition at line 341 of file RISCVFrameLowering.cpp.

References FPReg, llvm_unreachable, llvm::RISCVZC::RA, llvm::RISCVZC::RA_S0, llvm::RISCVZC::RA_S0_S1, llvm::RISCVZC::RA_S0_S11, llvm::RISCVZC::RA_S0_S2, llvm::RISCVZC::RA_S0_S3, llvm::RISCVZC::RA_S0_S4, llvm::RISCVZC::RA_S0_S5, llvm::RISCVZC::RA_S0_S6, llvm::RISCVZC::RA_S0_S7, llvm::RISCVZC::RA_S0_S8, llvm::RISCVZC::RA_S0_S9, and RAReg.

Referenced by llvm::RISCVFrameLowering::assignCalleeSavedSpillSlots().

◆ getRestoreLibCallName()

static const char * getRestoreLibCallName ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 314 of file RISCVFrameLowering.cpp.

References getLibCallID().

Referenced by llvm::RISCVFrameLowering::restoreCalleeSavedRegisters().

◆ getRVVBaseRegister()

static MCRegister getRVVBaseRegister ( const RISCVRegisterInfo &  TRI,
const Register &  Reg 
)
static

Definition at line 1917 of file RISCVFrameLowering.cpp.

References TRI.

◆ getRVVCalleeSavedInfo()

static SmallVector< CalleeSavedInfo, 8 > getRVVCalleeSavedInfo ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 469 of file RISCVFrameLowering.cpp.

References llvm::CalleeSavedInfo::getFrameIdx(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getStackID(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::TargetStackID::ScalableVector.

Referenced by llvm::RISCVFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::restoreCalleeSavedRegisters(), and llvm::RISCVFrameLowering::spillCalleeSavedRegisters().

◆ getScavSlotsNumForRVV()

static unsigned getScavSlotsNumForRVV ( MachineFunction &  MF)
static

Definition at line 1494 of file RISCVFrameLowering.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getStackID(), llvm::MachineFunction::getSubtarget(), llvm::RISCVSubtarget::hasVInstructions(), llvm::RISCV::isRVVSpill(), MBB, MI, and llvm::TargetStackID::ScalableVector.

Referenced by llvm::RISCVFrameLowering::processFunctionBeforeFrameFinalized().

◆ getSpillLibCallName()

static const char * getSpillLibCallName ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 287 of file RISCVFrameLowering.cpp.

References getLibCallID().

Referenced by llvm::RISCVFrameLowering::spillCalleeSavedRegisters().

◆ getUnmanagedCSI()

static SmallVector< CalleeSavedInfo, 8 > getUnmanagedCSI ( const MachineFunction &  MF,
const std::vector< CalleeSavedInfo > &  CSI 
)
static

Definition at line 454 of file RISCVFrameLowering.cpp.

References llvm::TargetStackID::Default, llvm::CalleeSavedInfo::getFrameIdx(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getStackID(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by llvm::RISCVFrameLowering::emitEpilogue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::getFrameIndexReference(), llvm::RISCVFrameLowering::restoreCalleeSavedRegisters(), and llvm::RISCVFrameLowering::spillCalleeSavedRegisters().

◆ hasRVVFrameObject()

static bool hasRVVFrameObject ( const MachineFunction &  MF)
static

Definition at line 1538 of file RISCVFrameLowering.cpp.

References llvm::MachineFunction::getSubtarget().

Referenced by llvm::RISCVFrameLowering::hasReservedCallFrame(), and llvm::RISCVFrameLowering::processFunctionBeforeFrameFinalized().

Variable Documentation

◆ FixedCSRFIMap

const std::pair<MCPhysReg, int8_t> FixedCSRFIMap[]
static
Initial value:
= {
{ RAReg, -1}, { FPReg, -2},
{ RISCV::X9, -3}, { RISCV::X18, -4},
{ RISCV::X19, -5}, { RISCV::X20, -6},
{ RISCV::X21, -7}, { RISCV::X22, -8},
{ RISCV::X23, -9}, { RISCV::X24, -10},
{ RISCV::X25, -11}, { RISCV::X26, -12},
{ RISCV::X27, -13}}
FPReg
static constexpr Register FPReg
Definition: RISCVFrameLowering.cpp:105
RAReg
static constexpr Register RAReg
Definition: RISCVFrameLowering.cpp:111

Definition at line 115 of file RISCVFrameLowering.cpp.

Referenced by llvm::RISCVFrameLowering::assignCalleeSavedSpillSlots(), getMaxPushPopReg(), getPushOrLibCallsSavedInfo(), llvm::RISCVFrameLowering::restoreCalleeSavedRegisters(), and llvm::RISCVFrameLowering::spillCalleeSavedRegisters().

◆ FPReg

constexpr Register FPReg = RISCV::X8
staticconstexpr

Definition at line 105 of file RISCVFrameLowering.cpp.

Referenced by llvm::M68kFrameLowering::assignCalleeSavedSpillSlots(), llvm::X86FrameLowering::assignCalleeSavedSpillSlots(), llvm::RISCVFrameLowering::determineCalleeSaves(), llvm::SIFrameLowering::emitEntryFunctionPrologue(), llvm::CSKYFrameLowering::emitEpilogue(), llvm::PPCFrameLowering::emitEpilogue(), llvm::RISCVFrameLowering::emitEpilogue(), llvm::CSKYFrameLowering::emitPrologue(), llvm::LoongArchFrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::getFrameIndexReference(), getLibCallID(), getPushPopEncodingAndNum(), llvm::PPCFrameLowering::inlineStackProbe(), llvm::PPCFrameLowering::replaceFPWithRealFP(), llvm::Thumb1FrameLowering::restoreCalleeSavedRegisters(), and llvm::Thumb1FrameLowering::spillCalleeSavedRegisters().

◆ RAReg

constexpr Register RAReg = RISCV::X1
staticconstexpr

Definition at line 111 of file RISCVFrameLowering.cpp.

Referenced by llvm::RISCVFrameLowering::determineCalleeSaves(), emitSCSEpilogue(), emitSCSPrologue(), getLibCallID(), getPushPopEncodingAndNum(), llvm::MCRegisterInfo::getRARegister(), and llvm::MCRegisterInfo::InitMCRegisterInfo().

◆ SPReg

constexpr Register SPReg = RISCV::X2
staticconstexpr

Definition at line 108 of file RISCVFrameLowering.cpp.

Referenced by llvm::X86FrameLowering::adjustForHiPEPrologue(), llvm::RISCVFrameLowering::allocateStack(), llvm::AMDGPURegisterBankInfo::applyMappingDynStackAlloc(), createDefCFAExpression(), llvm::SIFrameLowering::eliminateCallFramePseudoInstr(), llvm::CSKYFrameLowering::eliminateCallFramePseudoInstr(), llvm::LoongArchFrameLowering::eliminateCallFramePseudoInstr(), llvm::RISCVFrameLowering::eliminateCallFramePseudoInstr(), llvm::RISCVTargetLowering::emitDynamicProbedAlloc(), llvm::SIFrameLowering::emitEntryFunctionPrologue(), llvm::CSKYFrameLowering::emitEpilogue(), llvm::LoongArchFrameLowering::emitEpilogue(), llvm::PPCFrameLowering::emitEpilogue(), llvm::RISCVFrameLowering::emitEpilogue(), llvm::SystemZXPLINKFrameLowering::emitEpilogue(), llvm::WebAssemblyFrameLowering::emitEpilogue(), llvm::PPCTargetLowering::emitProbedAlloca(), llvm::CSKYFrameLowering::emitPrologue(), llvm::LoongArchFrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::WebAssemblyFrameLowering::emitPrologue(), emitStackProbeInline(), llvm::LegalizerHelper::getDynStackAllocTargetPtr(), llvm::RISCVFrameLowering::getFrameIndexReference(), M68kOutgoingArgHandler::getStackAddress(), llvm::PPCFrameLowering::inlineStackProbe(), llvm::PPCInstrInfo::isTOCSaveMI(), llvm::SITargetLowering::LowerDYNAMIC_STACKALLOC(), llvm::LanaiTargetLowering::LowerDYNAMIC_STACKALLOC(), LowerDYNAMIC_STACKALLOC(), and llvm::LegalizerHelper::lowerDynStackAlloc().

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