#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/ADT/Statistic.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/MCObjectFileInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Debug.h"
#include "llvm/Target/TargetOptions.h"
#include <cstdlib>

Include dependency graph for X86FrameLowering.cpp:

Macros
#define	DEBUG_TYPE "x86-fl"

Functions
	STATISTIC (NumFrameLoopProbe, "Number of loop stack probes used in prologue")

	STATISTIC (NumFrameExtraProbe, "Number of extra stack probes generated in prologue")

static unsigned	getSUBriOpcode (bool IsLP64, int64_t Imm)

static unsigned	getADDriOpcode (bool IsLP64, int64_t Imm)

static unsigned	getSUBrrOpcode (bool IsLP64)

static unsigned	getADDrrOpcode (bool IsLP64)

static unsigned	getANDriOpcode (bool IsLP64, int64_t Imm)

static unsigned	getLEArOpcode (bool IsLP64)

static unsigned	getMOVriOpcode (bool Use64BitReg, int64_t Imm)

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...

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

Variables
static const uint64_t	kSplitStackAvailable = 256

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "x86-fl"

Definition at line 37 of file X86FrameLowering.cpp.

Function Documentation

◆ blockEndIsUnreachable()

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

static

Definition at line 3075 of file X86FrameLowering.cpp.

References llvm::all_of(), llvm::MachineBasicBlock::end(), MBB, MBBI, MI, and llvm::MachineBasicBlock::successors().

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

◆ calculateSetFPREG()

static unsigned calculateSetFPREG ( uint64_t SPAdjust )

static

Definition at line 1103 of file X86FrameLowering.cpp.

References llvm::min().

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

◆ 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 180 of file X86FrameLowering.cpp.

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

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

◆ getADDriOpcode()

static unsigned getADDriOpcode	(	bool	IsLP64,
		int64_t	Imm
	)

static

Definition at line 117 of file X86FrameLowering.cpp.

References llvm::isInt< 8 >().

Referenced by llvm::X86FrameLowering::restoreWin32EHStackPointers().

◆ getADDrrOpcode()

static unsigned getADDrrOpcode ( bool IsLP64 )

static

Definition at line 133 of file X86FrameLowering.cpp.

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

◆ getANDriOpcode()

static unsigned getANDriOpcode	(	bool	IsLP64,
		int64_t	Imm
	)

static

Definition at line 137 of file X86FrameLowering.cpp.

References llvm::isInt< 8 >().

◆ 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 3055 of file X86FrameLowering.cpp.

References llvm::numbers::e, llvm::NamedMDNode::getNumOperands(), and i.

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

◆ getLEArOpcode()

static unsigned getLEArOpcode ( bool IsLP64 )

static

Definition at line 148 of file X86FrameLowering.cpp.

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

◆ getMOVriOpcode()

static unsigned getMOVriOpcode	(	bool	Use64BitReg,
		int64_t	Imm
	)

static

Definition at line 152 of file X86FrameLowering.cpp.

References llvm::isInt< 32 >(), and llvm::isUInt< 32 >().

Referenced by llvm::X86FrameLowering::adjustForSegmentedStacks(), 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 2769 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(), llvm::CallingConv::Tail, and llvm::CallingConv::X86_FastCall.