llvm::CCState Class Reference

CCState - This class holds information needed while lowering arguments and return values. More...

#include "llvm/CodeGen/CallingConvLower.h"

Inheritance diagram for llvm::CCState:

Public Member Functions
	CCState (CallingConv::ID CC, bool IsVarArg, MachineFunction &MF, SmallVectorImpl< CCValAssign > &Locs, LLVMContext &Context, bool NegativeOffsets=false)
void	addLoc (const CCValAssign &V)
LLVMContext &	getContext () const
MachineFunction &	getMachineFunction () const
CallingConv::ID	getCallingConv () const
bool	isVarArg () const
uint64_t	getStackSize () const
	Returns the size of the currently allocated portion of the stack.
uint64_t	getAlignedCallFrameSize () const
	getAlignedCallFrameSize - Return the size of the call frame needed to be able to store all arguments and such that the alignment requirement of each of the arguments is satisfied.
bool	isAllocated (MCRegister Reg) const
	isAllocated - Return true if the specified register (or an alias) is allocated.
void	AnalyzeFormalArguments (const SmallVectorImpl< ISD::InputArg > &Ins, CCAssignFn Fn)
	AnalyzeFormalArguments - Analyze an array of argument values, incorporating info about the formals into this state.
void	AnalyzeArguments (const SmallVectorImpl< ISD::InputArg > &Ins, CCAssignFn Fn)
	The function will invoke AnalyzeFormalArguments.
void	AnalyzeReturn (const SmallVectorImpl< ISD::OutputArg > &Outs, CCAssignFn Fn)
	AnalyzeReturn - Analyze the returned values of a return, incorporating info about the result values into this state.
bool	CheckReturn (const SmallVectorImpl< ISD::OutputArg > &Outs, CCAssignFn Fn)
	CheckReturn - Analyze the return values of a function, returning true if the return can be performed without sret-demotion, and false otherwise.
void	AnalyzeCallOperands (const SmallVectorImpl< ISD::OutputArg > &Outs, CCAssignFn Fn)
	AnalyzeCallOperands - Analyze the outgoing arguments to a call, incorporating info about the passed values into this state.
void	AnalyzeCallOperands (SmallVectorImpl< MVT > &ArgVTs, SmallVectorImpl< ISD::ArgFlagsTy > &Flags, CCAssignFn Fn)
	AnalyzeCallOperands - Same as above except it takes vectors of types and argument flags.
void	AnalyzeArguments (const SmallVectorImpl< ISD::OutputArg > &Outs, CCAssignFn Fn)
	The function will invoke AnalyzeCallOperands.
void	AnalyzeCallResult (const SmallVectorImpl< ISD::InputArg > &Ins, CCAssignFn Fn)
	AnalyzeCallResult - Analyze the return values of a call, incorporating info about the passed values into this state.
bool	IsShadowAllocatedReg (MCRegister Reg) const
	A shadow allocated register is a register that was allocated but wasn't added to the location list (Locs).
void	AnalyzeCallResult (MVT VT, CCAssignFn Fn)
	AnalyzeCallResult - Same as above except it's specialized for calls which produce a single value.
unsigned	getFirstUnallocated (ArrayRef< MCPhysReg > Regs) const
	getFirstUnallocated - Return the index of the first unallocated register in the set, or Regs.size() if they are all allocated.
void	DeallocateReg (MCPhysReg Reg)
MCRegister	AllocateReg (MCPhysReg Reg)
	AllocateReg - Attempt to allocate one register.
MCRegister	AllocateReg (MCPhysReg Reg, MCPhysReg ShadowReg)
	Version of AllocateReg with extra register to be shadowed.
MCRegister	AllocateReg (ArrayRef< MCPhysReg > Regs)
	AllocateReg - Attempt to allocate one of the specified registers.
MCPhysReg	AllocateRegBlock (ArrayRef< MCPhysReg > Regs, unsigned RegsRequired)
	AllocateRegBlock - Attempt to allocate a block of RegsRequired consecutive registers.
MCRegister	AllocateReg (ArrayRef< MCPhysReg > Regs, const MCPhysReg *ShadowRegs)
	Version of AllocateReg with list of registers to be shadowed.
int64_t	AllocateStack (unsigned Size, Align Alignment)
	AllocateStack - Allocate a chunk of stack space with the specified size and alignment.
void	ensureMaxAlignment (Align Alignment)
int64_t	AllocateStack (unsigned Size, Align Alignment, ArrayRef< MCPhysReg > ShadowRegs)
	Version of AllocateStack with list of extra registers to be shadowed.
void	HandleByVal (unsigned ValNo, MVT ValVT, MVT LocVT, CCValAssign::LocInfo LocInfo, int MinSize, Align MinAlign, ISD::ArgFlagsTy ArgFlags)
	Allocate space on the stack large enough to pass an argument by value.
unsigned	getInRegsParamsCount () const
unsigned	getInRegsParamsProcessed () const
void	getInRegsParamInfo (unsigned InRegsParamRecordIndex, unsigned &BeginReg, unsigned &EndReg) const
void	addInRegsParamInfo (unsigned RegBegin, unsigned RegEnd)
bool	nextInRegsParam ()
void	clearByValRegsInfo ()
void	rewindByValRegsInfo ()
SmallVectorImpl< CCValAssign > &	getPendingLocs ()
SmallVectorImpl< ISD::ArgFlagsTy > &	getPendingArgFlags ()
void	getRemainingRegParmsForType (SmallVectorImpl< MCPhysReg > &Regs, MVT VT, CCAssignFn Fn)
	Compute the remaining unused register parameters that would be used for the given value type.
void	analyzeMustTailForwardedRegisters (SmallVectorImpl< ForwardedRegister > &Forwards, ArrayRef< MVT > RegParmTypes, CCAssignFn Fn)
	Compute the set of registers that need to be preserved and forwarded to any musttail calls.
template<class T >
void	AnalyzeArgumentsSecondPass (const SmallVectorImpl< T > &Args, CCAssignFn Fn)
	The function runs an additional analysis pass over function arguments.

Static Public Member Functions
static bool	resultsCompatible (CallingConv::ID CalleeCC, CallingConv::ID CallerCC, MachineFunction &MF, LLVMContext &C, const SmallVectorImpl< ISD::InputArg > &Ins, CCAssignFn CalleeFn, CCAssignFn CallerFn)
	Returns true if the results of the two calling conventions are compatible.

Detailed Description

CCState - This class holds information needed while lowering arguments and return values.

It captures which registers are already assigned and which stack slots are used. It provides accessors to allocate these values.

Definition at line 170 of file CallingConvLower.h.

Constructor & Destructor Documentation

CCState()

CCState::CCState	(	CallingConv::ID	CC,
		bool	IsVarArg,
		MachineFunction &	MF,
		SmallVectorImpl< CCValAssign > &	Locs,
		LLVMContext &	Context,
		bool	NegativeOffsets = false
	)

Definition at line 28 of file CallingConvLower.cpp.

References clearByValRegsInfo(), llvm::MCRegisterInfo::getNumRegs(), and llvm::SmallVectorImpl< T >::resize().

Member Function Documentation

addInRegsParamInfo()

void llvm::CCState::addInRegsParamInfo ( unsigned  RegBegin, unsigned  RegEnd  )

inline

Definition at line 456 of file CallingConvLower.h.

References llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by llvm::MipsTargetLowering::HandleByVal().

addLoc()

void llvm::CCState::addLoc ( const CCValAssign &  V )

inline

Definition at line 235 of file CallingConvLower.h.

References llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by Analyze_CC_Sparc64_Full(), Analyze_CC_Sparc64_Half(), AnalyzeArguments(), llvm::analyzeArguments(), llvm::AMDGPUTargetLowering::analyzeFormalArgumentsCompute(), llvm::analyzeReturnValues(), CC_AArch64_Custom_Block(), CC_AIX(), CC_ARM_AAPCS_Custom_Aggregate(), llvm::CC_CSKY_ABIV2_SOFT_64(), CC_Lanai32_VarArg(), CC_LoongArch(), CC_LoongArch_GHC(), CC_LoongArchAssign2GRLen(), llvm::CC_M68k_Any_AssignToReg(), CC_MipsO32(), CC_PPC32_SPE_CustomSplitFP64(), CC_PPC32_SPE_RetF64(), llvm::CC_RISCV(), llvm::CC_RISCV_FastCC(), llvm::CC_RISCV_GHC(), CC_RISCVAssign2XLen(), CC_Sparc_Assign_Ret_Split_64(), CC_Sparc_Assign_Split_64(), CC_Sparc_Assign_SRet(), llvm::CC_SystemZ_I128Indirect(), CC_X86_32_MCUInReg(), CC_X86_32_RegCall_Assign2Regs(), CC_X86_32_VectorCall(), CC_X86_64_VectorCall(), CC_X86_Intr(), CC_X86_VectorCallAssignRegister(), llvm::CC_XPLINK64_Allocate128BitVararg(), CC_Xtensa_Custom(), CustomAssignInRegList(), f64AssignAAPCS(), f64AssignAPCS(), f64RetAssign(), finishStackBlock(), HandleByVal(), and llvm::Ret_CSKY_ABIV2_SOFT_64().

AllocateReg() [1/4]

MCRegister llvm::CCState::AllocateReg ( ArrayRef< MCPhysReg >  Regs )

inline

AllocateReg - Attempt to allocate one of the specified registers.

If none are available, return zero. Otherwise, return the first one available, marking it and any aliases as allocated.

Definition at line 349 of file CallingConvLower.h.

References getFirstUnallocated(), Reg, and llvm::ArrayRef< T >::size().

AllocateReg() [2/4]

MCRegister llvm::CCState::AllocateReg ( ArrayRef< MCPhysReg >  Regs, const MCPhysReg *  ShadowRegs  )

inline

Version of AllocateReg with list of registers to be shadowed.

Definition at line 390 of file CallingConvLower.h.

References getFirstUnallocated(), Reg, and llvm::ArrayRef< T >::size().

AllocateReg() [3/4]

MCRegister llvm::CCState::AllocateReg ( MCPhysReg  Reg )

inline

AllocateReg - Attempt to allocate one register.

If it is not available, return zero. Otherwise, return the register, marking it and any aliases as allocated.

Definition at line 330 of file CallingConvLower.h.

References isAllocated(), and Reg.

Referenced by allocateFixedSGPRInputImpl(), llvm::SITargetLowering::allocateHSAUserSGPRs(), allocateHSAUserSGPRs(), llvm::SITargetLowering::allocateLDSKernelId(), llvm::SITargetLowering::allocatePreloadKernArgSGPRs(), allocateRVVReg(), allocateSGPR32InputImpl(), llvm::SITargetLowering::allocateSpecialEntryInputVGPRs(), llvm::SITargetLowering::allocateSpecialInputVGPRsFixed(), llvm::SITargetLowering::allocateSystemSGPRs(), allocateVGPR32Input(), AnalyzeArguments(), llvm::analyzeArguments(), llvm::analyzeReturnValues(), CC_AArch64_Custom_Block(), CC_AIX(), CC_ARM_AAPCS_Custom_Aggregate(), llvm::CC_CSKY_ABIV2_SOFT_64(), CC_LoongArch(), CC_LoongArch_GHC(), CC_LoongArchAssign2GRLen(), llvm::CC_M68k_Any_AssignToReg(), CC_MipsO32(), CC_PPC32_SPE_CustomSplitFP64(), CC_PPC32_SPE_RetF64(), CC_PPC32_SVR4_Custom_AlignArgRegs(), CC_PPC32_SVR4_Custom_AlignFPArgRegs(), CC_PPC32_SVR4_Custom_SkipLastArgRegsPPCF128(), CC_PPC64_ELF_Shadow_GPR_Regs(), llvm::CC_RISCV(), llvm::CC_RISCV_FastCC(), llvm::CC_RISCV_GHC(), CC_RISCVAssign2XLen(), CC_SkipOdd(), CC_Sparc_Assign_Ret_Split_64(), CC_Sparc_Assign_Split_64(), llvm::CC_SystemZ_I128Indirect(), CC_X86_32_MCUInReg(), CC_X86_32_RegCall_Assign2Regs(), CC_X86_32_VectorCall(), CC_X86_64_VectorCall(), CC_X86_VectorCallAssignRegister(), llvm::CC_XPLINK64_Allocate128BitVararg(), llvm::CC_XPLINK64_Shadow_Reg(), CC_Xtensa_Custom(), CustomAssignInRegList(), f64AssignAAPCS(), f64AssignAPCS(), f64RetAssign(), finishStackBlock(), llvm::MipsTargetLowering::HandleByVal(), llvm::AMDGPUCallLowering::lowerFormalArguments(), llvm::SITargetLowering::LowerFormalArguments(), llvm::SITargetLowering::passSpecialInputs(), llvm::AMDGPUCallLowering::passSpecialInputs(), and llvm::Ret_CSKY_ABIV2_SOFT_64().

AllocateReg() [4/4]

MCRegister llvm::CCState::AllocateReg ( MCPhysReg  Reg, MCPhysReg  ShadowReg  )

inline

Version of AllocateReg with extra register to be shadowed.

Definition at line 338 of file CallingConvLower.h.

References isAllocated(), and Reg.

AllocateRegBlock()

MCPhysReg llvm::CCState::AllocateRegBlock ( ArrayRef< MCPhysReg >  Regs, unsigned  RegsRequired  )

inline

AllocateRegBlock - Attempt to allocate a block of RegsRequired consecutive registers.

If this is not possible, return zero. Otherwise, return the first register of the block that were allocated, marking the entire block as allocated.

Definition at line 363 of file CallingConvLower.h.

References isAllocated(), and llvm::ArrayRef< T >::size().

Referenced by CC_AArch64_Custom_Block(), and CC_ARM_AAPCS_Custom_Aggregate().

AllocateStack() [1/2]

int64_t llvm::CCState::AllocateStack ( unsigned  Size, Align  Alignment  )

inline

AllocateStack - Allocate a chunk of stack space with the specified size and alignment.

Definition at line 404 of file CallingConvLower.h.

References llvm::alignTo(), ensureMaxAlignment(), llvm::Offset, and Size.

Referenced by AllocateStack(), allocateVGPR32Input(), Analyze_CC_Sparc64_Full(), Analyze_CC_Sparc64_Half(), llvm::analyzeArguments(), analyzeCallOperands(), CC_AIX(), CC_ARM_AAPCS_Custom_Aggregate(), llvm::CC_CSKY_ABIV2_SOFT_64(), CC_Lanai32_VarArg(), CC_LoongArch(), CC_LoongArchAssign2GRLen(), CC_MipsO32(), llvm::CC_RISCV(), llvm::CC_RISCV_FastCC(), CC_RISCVAssign2XLen(), CC_Sparc_Assign_Split_64(), llvm::CC_SystemZ_I128Indirect(), CC_X86_32_MCUInReg(), CC_X86_64_VectorCall(), CC_X86_Intr(), llvm::CC_XPLINK64_Allocate128BitVararg(), CC_Xtensa_Custom(), f64AssignAAPCS(), f64AssignAPCS(), finishStackBlock(), HandleByVal(), llvm::MipsCallLowering::lowerCall(), llvm::VETargetLowering::LowerCall(), llvm::MipsCallLowering::lowerFormalArguments(), llvm::VETargetLowering::LowerFormalArguments(), and llvm::SITargetLowering::passSpecialInputs().

AllocateStack() [2/2]

int64_t llvm::CCState::AllocateStack ( unsigned  Size, Align  Alignment, ArrayRef< MCPhysReg >  ShadowRegs  )

inline

Version of AllocateStack with list of extra registers to be shadowed.

Note that, unlike AllocateReg, this shadows ALL of the shadow registers.

Definition at line 422 of file CallingConvLower.h.

References AllocateStack(), Reg, and Size.

AnalyzeArguments() [1/2]

void llvm::CCState::AnalyzeArguments ( const SmallVectorImpl< ISD::InputArg > &  Ins, CCAssignFn  Fn  )

inline

The function will invoke AnalyzeFormalArguments.

Definition at line 266 of file CallingConvLower.h.

References AnalyzeFormalArguments().

Referenced by AnalyzeArgumentsSecondPass().

AnalyzeArguments() [2/2]

void llvm::CCState::AnalyzeArguments ( const SmallVectorImpl< ISD::OutputArg > &  Outs, CCAssignFn  Fn  )

inline

The function will invoke AnalyzeCallOperands.

Definition at line 294 of file CallingConvLower.h.

References AnalyzeCallOperands().

AnalyzeArgumentsSecondPass()

template<class T >

void llvm::CCState::AnalyzeArgumentsSecondPass ( const SmallVectorImpl< T > &  Args, CCAssignFn  Fn  )

inline

The function runs an additional analysis pass over function arguments.

It will mark each argument with the attribute flag SecArgPass. After running, it will sort the locs list.

Creates similar argument list to Args in which each argument is marked using SecArgPass flag.

Definition at line 516 of file CallingConvLower.h.

References A, AnalyzeArguments(), B, llvm::SmallVectorTemplateCommon< T, typename >::begin(), E, llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorBase< Size_T >::size(), and llvm::SmallVectorImpl< T >::swap().

AnalyzeCallOperands() [1/2]

void CCState::AnalyzeCallOperands	(	const SmallVectorImpl< ISD::OutputArg > &	Outs,
		CCAssignFn	Fn
	)

AnalyzeCallOperands - Analyze the outgoing arguments to a call, incorporating info about the passed values into this state.

Analyze the outgoing arguments to a call, incorporating info about the passed values into this state.

Definition at line 126 of file CallingConvLower.cpp.

References llvm::dbgs(), llvm::CCValAssign::Full, llvm_unreachable, and llvm::SmallVectorBase< Size_T >::size().

Referenced by AnalyzeArguments(), llvm::AIXCCState::AnalyzeCallOperands(), llvm::SystemZCCState::AnalyzeCallOperands(), llvm::MipsCCState::AnalyzeCallOperands(), AnalyzeVarArgs(), llvm::SITargetLowering::isEligibleForTailCallOptimization(), llvm::SITargetLowering::LowerCall(), llvm::XtensaTargetLowering::LowerCall(), llvm::LoongArchTargetLowering::LowerCall(), llvm::RISCVTargetLowering::LowerCall(), llvm::VETargetLowering::LowerCall(), llvm::SparcTargetLowering::LowerCall_32(), and llvm::SparcTargetLowering::LowerCall_64().

AnalyzeCallOperands() [2/2]

void CCState::AnalyzeCallOperands	(	SmallVectorImpl< MVT > &	ArgVTs,
		SmallVectorImpl< ISD::ArgFlagsTy > &	Flags,
		CCAssignFn	Fn
	)

AnalyzeCallOperands - Same as above except it takes vectors of types and argument flags.

Same as above except it takes vectors of types and argument flags.

Definition at line 143 of file CallingConvLower.cpp.

References llvm::dbgs(), llvm::CCValAssign::Full, llvm_unreachable, and llvm::SmallVectorBase< Size_T >::size().

AnalyzeCallResult() [1/2]

void CCState::AnalyzeCallResult	(	const SmallVectorImpl< ISD::InputArg > &	Ins,
		CCAssignFn	Fn
	)

AnalyzeCallResult - Analyze the return values of a call, incorporating info about the passed values into this state.

Analyze the return values of a call, incorporating info about the passed values into this state.

Definition at line 162 of file CallingConvLower.cpp.

References llvm::dbgs(), llvm::CCValAssign::Full, and llvm_unreachable.

Referenced by llvm::MipsCCState::AnalyzeCallResult(), AnalyzeRetResult(), llvm::SystemZTargetLowering::LowerCall(), llvm::XtensaTargetLowering::LowerCall(), llvm::VETargetLowering::LowerCall(), llvm::SparcTargetLowering::LowerCall_32(), llvm::SparcTargetLowering::LowerCall_64(), llvm::SITargetLowering::LowerCallResult(), llvm::HexagonTargetLowering::LowerCallResult(), and resultsCompatible().

AnalyzeCallResult() [2/2]

void CCState::AnalyzeCallResult	(	MVT	VT,
		CCAssignFn	Fn
	)

AnalyzeCallResult - Same as above except it's specialized for calls which produce a single value.

Same as above except it's specialized for calls that produce a single value.

Definition at line 178 of file CallingConvLower.cpp.

References llvm::dbgs(), llvm::CCValAssign::Full, and llvm_unreachable.

AnalyzeFormalArguments()

void CCState::AnalyzeFormalArguments	(	const SmallVectorImpl< ISD::InputArg > &	Ins,
		CCAssignFn	Fn
	)

AnalyzeFormalArguments - Analyze an array of argument values, incorporating info about the formals into this state.

Analyze an array of argument values, incorporating info about the formals into this state.

Definition at line 85 of file CallingConvLower.cpp.

References llvm::CCValAssign::Full, and llvm::report_fatal_error().

Referenced by AnalyzeArguments(), llvm::MipsCCState::AnalyzeFormalArguments(), llvm::AIXCCState::AnalyzeFormalArguments(), llvm::SystemZCCState::AnalyzeFormalArguments(), AnalyzeVarArgs(), llvm::R600TargetLowering::LowerFormalArguments(), llvm::SITargetLowering::LowerFormalArguments(), llvm::LoongArchTargetLowering::LowerFormalArguments(), llvm::RISCVTargetLowering::LowerFormalArguments(), llvm::VETargetLowering::LowerFormalArguments(), llvm::XtensaTargetLowering::LowerFormalArguments(), llvm::SparcTargetLowering::LowerFormalArguments_32(), and llvm::SparcTargetLowering::LowerFormalArguments_64().

analyzeMustTailForwardedRegisters()

void CCState::analyzeMustTailForwardedRegisters	(	SmallVectorImpl< ForwardedRegister > &	Forwards,
		ArrayRef< MVT >	RegParmTypes,
		CCAssignFn	Fn
	)

Compute the set of registers that need to be preserved and forwarded to any musttail calls.

Definition at line 240 of file CallingConvLower.cpp.

References llvm::MachineFunction::addLiveIn(), llvm::TargetLoweringBase::getRegClassFor(), getRemainingRegParmsForType(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by handleMustTailForwardedRegisters().

AnalyzeReturn()

void CCState::AnalyzeReturn	(	const SmallVectorImpl< ISD::OutputArg > &	Outs,
		CCAssignFn	Fn
	)

AnalyzeReturn - Analyze the returned values of a return, incorporating info about the result values into this state.

Analyze the returned values of a return, incorporating info about the result values into this state.

Definition at line 113 of file CallingConvLower.cpp.

References llvm::CCValAssign::Full, llvm::report_fatal_error(), and llvm::SmallVectorBase< Size_T >::size().

Referenced by AnalyzeRetResult(), llvm::MipsCCState::AnalyzeReturn(), llvm::SITargetLowering::LowerReturn(), llvm::HexagonTargetLowering::LowerReturn(), llvm::SystemZTargetLowering::LowerReturn(), llvm::VETargetLowering::LowerReturn(), llvm::XtensaTargetLowering::LowerReturn(), llvm::SparcTargetLowering::LowerReturn_32(), and llvm::SparcTargetLowering::LowerReturn_64().

CheckReturn()

bool CCState::CheckReturn	(	const SmallVectorImpl< ISD::OutputArg > &	Outs,
		CCAssignFn	Fn
	)

CheckReturn - Analyze the return values of a function, returning true if the return can be performed without sret-demotion, and false otherwise.

Analyze the return values of a function, returning true if the return can be performed without sret-demotion and false otherwise.

Definition at line 99 of file CallingConvLower.cpp.

References llvm::CCValAssign::Full, and llvm::SmallVectorBase< Size_T >::size().

Referenced by llvm::VETargetLowering::CanLowerReturn(), llvm::SITargetLowering::CanLowerReturn(), llvm::HexagonTargetLowering::CanLowerReturn(), llvm::LanaiTargetLowering::CanLowerReturn(), llvm::SparcTargetLowering::CanLowerReturn(), llvm::SystemZTargetLowering::CanLowerReturn(), llvm::XtensaTargetLowering::CanLowerReturn(), and llvm::MipsCCState::CheckReturn().

clearByValRegsInfo()

void llvm::CCState::clearByValRegsInfo ( )

inline

Definition at line 471 of file CallingConvLower.h.

References llvm::SmallVectorImpl< T >::clear().

Referenced by CCState().

DeallocateReg()

void llvm::CCState::DeallocateReg ( MCPhysReg  Reg )

inline

Definition at line 322 of file CallingConvLower.h.

References assert(), isAllocated(), and Reg.

Referenced by finishStackBlock().

ensureMaxAlignment()

void CCState::ensureMaxAlignment

(

Align

Alignment

)

Definition at line 188 of file CallingConvLower.cpp.

References llvm::MachineFrameInfo::ensureMaxAlignment(), and llvm::MachineFunction::getFrameInfo().

Referenced by AllocateStack(), and HandleByVal().

getAlignedCallFrameSize()

uint64_t llvm::CCState::getAlignedCallFrameSize ( ) const

inline

getAlignedCallFrameSize - Return the size of the call frame needed to be able to store all arguments and such that the alignment requirement of each of the arguments is satisfied.

Definition at line 250 of file CallingConvLower.h.

References llvm::alignTo().

getCallingConv()

CallingConv::ID llvm::CCState::getCallingConv ( ) const

inline

Definition at line 241 of file CallingConvLower.h.

Referenced by AnalyzeArguments(), llvm::CallLowering::determineAssignments(), finishStackBlock(), llvm::MipsTargetLowering::HandleByVal(), and llvm::MipsCallLowering::lowerFormalArguments().

getContext()

LLVMContext & llvm::CCState::getContext ( ) const

inline

Definition at line 239 of file CallingConvLower.h.

Referenced by llvm::analyzeArguments(), llvm::AMDGPUTargetLowering::analyzeFormalArgumentsCompute(), and llvm::CallLowering::determineAssignments().

getFirstUnallocated()

unsigned llvm::CCState::getFirstUnallocated ( ArrayRef< MCPhysReg >  Regs ) const

inline

getFirstUnallocated - Return the index of the first unallocated register in the set, or Regs.size() if they are all allocated.

Definition at line 315 of file CallingConvLower.h.

References isAllocated(), and llvm::ArrayRef< T >::size().

Referenced by AllocateReg(), allocateSGPR32InputImpl(), allocateVGPR32Input(), CC_AIX(), CC_ARM_AAPCS_Custom_Aggregate(), CC_LoongArch(), CC_MipsO32(), CC_PPC32_SVR4_Custom_AlignArgRegs(), CC_PPC32_SVR4_Custom_AlignFPArgRegs(), CC_PPC32_SVR4_Custom_SkipLastArgRegsPPCF128(), CC_PPC64_ELF_Shadow_GPR_Regs(), llvm::CC_RISCV(), llvm::CC_RISCV_FastCC(), CC_SkipOdd(), CC_X86_32_MCUInReg(), llvm::MipsTargetLowering::HandleByVal(), llvm::MipsCallLowering::lowerFormalArguments(), llvm::LoongArchTargetLowering::LowerFormalArguments(), llvm::RISCVTargetLowering::LowerFormalArguments(), llvm::XtensaTargetLowering::LowerFormalArguments(), and llvm::SparcTargetLowering::LowerFormalArguments_32().

getInRegsParamInfo()

void llvm::CCState::getInRegsParamInfo ( unsigned  InRegsParamRecordIndex, unsigned &  BeginReg, unsigned &  EndReg  ) const

inline

Definition at line 445 of file CallingConvLower.h.

References assert(), info, and llvm::SmallVectorBase< Size_T >::size().

getInRegsParamsCount()

unsigned llvm::CCState::getInRegsParamsCount ( ) const

inline

Definition at line 438 of file CallingConvLower.h.

References llvm::SmallVectorBase< Size_T >::size().

getInRegsParamsProcessed()

unsigned llvm::CCState::getInRegsParamsProcessed ( ) const

inline

Definition at line 441 of file CallingConvLower.h.

getMachineFunction()

MachineFunction & llvm::CCState::getMachineFunction ( ) const

inline

Definition at line 240 of file CallingConvLower.h.

Referenced by allocateFixedSGPRInputImpl(), allocateSGPR32InputImpl(), allocateVGPR32Input(), llvm::AMDGPUTargetLowering::analyzeFormalArgumentsCompute(), CC_AArch64_Custom_Block(), CC_AIX(), CC_ARM_AAPCS_Custom_Aggregate(), CC_MipsO32(), llvm::CC_RISCV(), llvm::CC_RISCV_FastCC(), llvm::CC_RISCV_GHC(), CC_RISCVAssign2XLen(), llvm::CC_SystemZ_I128Indirect(), CC_X86_64_VectorCall(), CC_X86_Intr(), CC_X86_VectorCallAssignRegister(), and finishStackBlock().

getPendingArgFlags()

SmallVectorImpl< ISD::ArgFlagsTy > & llvm::CCState::getPendingArgFlags ( )

inline

Definition at line 487 of file CallingConvLower.h.

Referenced by CC_LoongArch(), and llvm::CC_RISCV().

getPendingLocs()

SmallVectorImpl< CCValAssign > & llvm::CCState::getPendingLocs ( )

inline

Definition at line 482 of file CallingConvLower.h.

Referenced by CC_AArch64_Custom_Block(), CC_AArch64_Custom_Stack_Block(), CC_ARM_AAPCS_Custom_Aggregate(), CC_LoongArch(), llvm::CC_RISCV(), llvm::CC_SystemZ_I128Indirect(), and CC_X86_32_MCUInReg().

getRemainingRegParmsForType()

void CCState::getRemainingRegParmsForType	(	SmallVectorImpl< MCPhysReg > &	Regs,
		MVT	VT,
		CCAssignFn	Fn
	)

Compute the remaining unused register parameters that would be used for the given value type.

This is useful when varargs are passed in the registers that normal prototyped parameters would be passed in, or for implementing perfect forwarding.

Definition at line 201 of file CallingConvLower.cpp.

References assert(), llvm::dbgs(), llvm::CCValAssign::Full, I, isValueTypeInRegForCC(), llvm_unreachable, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by analyzeMustTailForwardedRegisters().

getStackSize()

uint64_t llvm::CCState::getStackSize ( ) const

inline

Returns the size of the currently allocated portion of the stack.

Definition at line 245 of file CallingConvLower.h.

Referenced by llvm::AMDGPUCallLowering::areCalleeOutgoingArgsTailCallable(), llvm::CallLowering::ValueAssigner::assignArg(), CC_AIX(), CC_ARM_AAPCS_Custom_Aggregate(), llvm::SparcTargetLowering::IsEligibleForTailCallOptimization(), llvm::SITargetLowering::isEligibleForTailCallOptimization(), llvm::SITargetLowering::LowerCall(), llvm::SystemZTargetLowering::LowerCall(), llvm::XtensaTargetLowering::LowerCall(), llvm::AMDGPUCallLowering::lowerCall(), llvm::MipsCallLowering::lowerCall(), llvm::LoongArchTargetLowering::LowerCall(), llvm::RISCVTargetLowering::LowerCall(), llvm::VETargetLowering::LowerCall(), llvm::SparcTargetLowering::LowerCall_32(), llvm::SparcTargetLowering::LowerCall_64(), llvm::MipsCallLowering::lowerFormalArguments(), llvm::SITargetLowering::LowerFormalArguments(), llvm::LoongArchTargetLowering::LowerFormalArguments(), llvm::RISCVTargetLowering::LowerFormalArguments(), llvm::SystemZTargetLowering::LowerFormalArguments(), llvm::XtensaTargetLowering::LowerFormalArguments(), llvm::SparcTargetLowering::LowerFormalArguments_32(), llvm::SparcTargetLowering::LowerFormalArguments_64(), and llvm::AMDGPUCallLowering::lowerTailCall().

HandleByVal()

void CCState::HandleByVal	(	unsigned	ValNo,
		MVT	ValVT,
		MVT	LocVT,
		CCValAssign::LocInfo	LocInfo,
		int	MinSize,
		Align	MinAlign,
		ISD::ArgFlagsTy	ArgFlags
	)

Allocate space on the stack large enough to pass an argument by value.

The size and alignment information of the argument is encoded in its parameter attribute.

Definition at line 45 of file CallingConvLower.cpp.

References addLoc(), llvm::alignTo(), AllocateStack(), ensureMaxAlignment(), llvm::ISD::ArgFlagsTy::getByValSize(), llvm::CCValAssign::getMem(), llvm::ISD::ArgFlagsTy::getNonZeroByValAlign(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::TargetLowering::HandleByVal(), llvm::MinAlign(), llvm::Offset, and Size.

Referenced by AnalyzeArguments().

isAllocated()

bool llvm::CCState::isAllocated ( MCRegister  Reg ) const

inline

isAllocated - Return true if the specified register (or an alias) is allocated.

Definition at line 256 of file CallingConvLower.h.

References Reg.

Referenced by AllocateReg(), AllocateRegBlock(), llvm::SITargetLowering::CanLowerReturn(), CC_X86_32_RegCall_Assign2Regs(), CC_X86_64_VectorCall(), CC_X86_VectorCallAssignRegister(), llvm::CC_XPLINK64_Shadow_Reg(), DeallocateReg(), findFirstFreeSGPR(), finishStackBlock(), getFirstUnallocated(), handleMustTailForwardedRegisters(), and IsShadowAllocatedReg().

IsShadowAllocatedReg()

bool CCState::IsShadowAllocatedReg

(

MCRegister

Reg

)

const

A shadow allocated register is a register that was allocated but wasn't added to the location list (Locs).

Returns

true if the register was allocated as shadow or false otherwise.

Definition at line 72 of file CallingConvLower.cpp.

References isAllocated(), and llvm::TargetRegisterInfo::regsOverlap().

Referenced by CC_X86_VectorCallAssignRegister().

isVarArg()

bool llvm::CCState::isVarArg ( ) const

inline

Definition at line 242 of file CallingConvLower.h.

Referenced by AnalyzeArguments(), llvm::CallLowering::ValueAssigner::assignArg(), CC_AIX(), and CC_MipsO32().

nextInRegsParam()

bool llvm::CCState::nextInRegsParam ( )

inline

Definition at line 463 of file CallingConvLower.h.

References llvm::SmallVectorBase< Size_T >::size().

resultsCompatible()

bool CCState::resultsCompatible ( CallingConv::ID  CalleeCC, CallingConv::ID  CallerCC, MachineFunction &  MF, LLVMContext &  C, const SmallVectorImpl< ISD::InputArg > &  Ins, CCAssignFn  CalleeFn, CCAssignFn  CallerFn  )

static

Returns true if the results of the two calling conventions are compatible.

This is usually part of the check for tailcall eligibility.

Definition at line 261 of file CallingConvLower.cpp.

References AnalyzeCallResult(), assert(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::CallingConv::C, llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::CCValAssign::getLocInfo(), llvm::CCValAssign::getLocMemOffset(), llvm::CCValAssign::getLocReg(), llvm::CCValAssign::isMemLoc(), llvm::CCValAssign::isPendingLoc(), llvm::CCValAssign::isRegLoc(), and llvm_unreachable.

Referenced by llvm::SITargetLowering::isEligibleForTailCallOptimization().

rewindByValRegsInfo()

void llvm::CCState::rewindByValRegsInfo ( )

inline

Definition at line 477 of file CallingConvLower.h.

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The documentation for this class was generated from the following files:

• include/llvm/CodeGen/CallingConvLower.h
• lib/CodeGen/CallingConvLower.cpp