#include "X86FrameLowering.h"
#include "X86InstrBuilder.h"
#include "X86InstrInfo.h"
#include "X86MachineFunctionInfo.h"
#include "X86Subtarget.h"
#include "X86TargetMachine.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/WinEHFuncInfo.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Function.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Debug.h"
#include "llvm/Target/TargetOptions.h"
#include <cstdlib>

Include dependency graph for X86FrameLowering.cpp:

Functions
static unsigned	getSUBriOpcode (unsigned IsLP64, int64_t Imm)

static unsigned	getADDriOpcode (unsigned IsLP64, int64_t Imm)

static unsigned	getSUBrrOpcode (unsigned isLP64)

static unsigned	getADDrrOpcode (unsigned isLP64)

static unsigned	getANDriOpcode (bool IsLP64, int64_t Imm)

static unsigned	getLEArOpcode (unsigned IsLP64)

static unsigned	findDeadCallerSavedReg (MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, const X86RegisterInfo *TRI, bool Is64Bit)
	findDeadCallerSavedReg - Return a caller-saved register that isn't live when it reaches the "return" instruction. More...

static bool	isEAXLiveIn (MachineBasicBlock &MBB)

static bool	flagsNeedToBePreservedBeforeTheTerminators (const MachineBasicBlock &MBB)
	Check if the flags need to be preserved before the terminators. More...

static unsigned	calculateSetFPREG (uint64_t SPAdjust)

static bool	isFuncletReturnInstr (MachineInstr &MI)

static bool	isTailCallOpcode (unsigned Opc)

static bool	HasNestArgument (const MachineFunction *MF)

static unsigned	GetScratchRegister (bool Is64Bit, bool IsLP64, const MachineFunction &MF, bool Primary)
	GetScratchRegister - Get a temp register for performing work in the segmented stack and the Erlang/HiPE stack prologue. More...

static unsigned	getHiPELiteral (NamedMDNode *HiPELiteralsMD, const StringRef LiteralName)
	Lookup an ERTS parameter in the !hipe.literals named metadata node. More...

bool	blockEndIsUnreachable (const MachineBasicBlock &MBB, MachineBasicBlock::const_iterator MBBI)

Variables
static const uint64_t	kSplitStackAvailable = 256

Function Documentation

◆ blockEndIsUnreachable()

bool blockEndIsUnreachable	(	const MachineBasicBlock &	MBB,
		MachineBasicBlock::const_iterator	MBBI
	)

Definition at line 2555 of file X86FrameLowering.cpp.

References llvm::all_of(), llvm::MachineBasicBlock::end(), MI, llvm::MachineBasicBlock::succ_begin(), and llvm::MachineBasicBlock::succ_end().

Referenced by llvm::X86FrameLowering::eliminateCallFramePseudoInstr().

◆ calculateSetFPREG()

static unsigned calculateSetFPREG ( uint64_t SPAdjust )

static

◆ findDeadCallerSavedReg()

static unsigned findDeadCallerSavedReg	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator &	MBBI,
		const X86RegisterInfo *	TRI,
		bool	Is64Bit
	)

static

findDeadCallerSavedReg - Return a caller-saved register that isn't live when it reaches the "return" instruction.

We can then pop a stack object to this register without worry about clobbering it.

Definition at line 145 of file X86FrameLowering.cpp.

References llvm::MachineFunction::callsEHReturn(), llvm::SmallSet< T, N, C >::count(), llvm::ISD::EH_RETURN, llvm::MachineBasicBlock::end(), llvm::N86::ESP, llvm::X86RegisterInfo::getGPRsForTailCall(), llvm::MachineBasicBlock::getParent(), llvm::MachineOperand::getReg(), llvm::SmallSet< T, N, C >::insert(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isReg(), llvm::MCRegAliasIterator::isValid(), Reg, and llvm::ARCISD::RET.

Referenced by llvm::X86FrameLowering::emitSPUpdate().

◆ flagsNeedToBePreservedBeforeTheTerminators()

static bool flagsNeedToBePreservedBeforeTheTerminators ( const MachineBasicBlock & MBB )

static

Check if the flags need to be preserved before the terminators.

This would be the case, if the eflags is live-in of the region composed by the terminators or live-out of that region, without being defined by a terminator.

Definition at line 213 of file X86FrameLowering.cpp.

References MI, Reg, llvm::MachineBasicBlock::successors(), and llvm::MachineBasicBlock::terminators().

Referenced by llvm::X86FrameLowering::canUseAsEpilogue(), and llvm::X86FrameLowering::emitSPUpdate().

◆ getADDriOpcode()

static unsigned getADDriOpcode	(	unsigned	IsLP64,
		int64_t	Imm
	)

static

Definition at line 107 of file X86FrameLowering.cpp.

References llvm::isInt< 8 >().

Referenced by llvm::X86FrameLowering::emitSPUpdate(), and llvm::X86FrameLowering::restoreWin32EHStackPointers().

◆ getADDrrOpcode()

static unsigned getADDrrOpcode ( unsigned isLP64 )

static

Definition at line 123 of file X86FrameLowering.cpp.

Referenced by llvm::X86FrameLowering::emitSPUpdate().

◆ getANDriOpcode()

static unsigned getANDriOpcode	(	bool	IsLP64,
		int64_t	Imm
	)

static

Definition at line 127 of file X86FrameLowering.cpp.

References llvm::isInt< 8 >().

Referenced by calculateSetFPREG().

◆ getHiPELiteral()

static unsigned getHiPELiteral	(	NamedMDNode *	HiPELiteralsMD,
		const StringRef	LiteralName
	)

static

Lookup an ERTS parameter in the !hipe.literals named metadata node.

HiPE provides Erlang Runtime System-internal parameters, such as PCB offsets to fields it needs, through a named metadata node "hipe.literals" containing name-value pairs.

Definition at line 2535 of file X86FrameLowering.cpp.

References llvm::NamedMDNode::getNumOperands().

Referenced by llvm::X86FrameLowering::adjustForHiPEPrologue().

◆ getLEArOpcode()

static unsigned getLEArOpcode ( unsigned IsLP64 )

static

Definition at line 138 of file X86FrameLowering.cpp.

Referenced by llvm::X86FrameLowering::emitEpilogue(), and llvm::X86FrameLowering::emitSPUpdate().

◆ GetScratchRegister()

static unsigned GetScratchRegister	(	bool	Is64Bit,
		bool	IsLP64,
		const MachineFunction &	MF,
		bool	Primary
	)

static

GetScratchRegister - Get a temp register for performing work in the segmented stack and the Erlang/HiPE stack prologue.

Depending on platform and the properties of the function either one or two registers will be needed. Set primary to true for the first register, false for the second.

Definition at line 2251 of file X86FrameLowering.cpp.

References llvm::N86::EAX, llvm::N86::EBX, llvm::N86::ECX, llvm::N86::EDI, llvm::N86::EDX, llvm::CallingConv::Fast, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), HasNestArgument(), llvm::CallingConv::HiPE, llvm::report_fatal_error(), and llvm::CallingConv::X86_FastCall.