X86FrameLowering.cpp File Reference

#include "X86FrameLowering.h"
#include "MCTargetDesc/X86MCTargetDesc.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/CodeGen/LivePhysRegs.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/EHPersonalities.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/Support/LEB128.h"
#include "llvm/Target/TargetOptions.h"
#include <cstdlib>

Go to the source code of this file.

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)
static unsigned	getADDriOpcode (bool IsLP64)
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.
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.
static unsigned	getHiPELiteral (NamedMDNode *HiPELiteralsMD, const StringRef LiteralName)
	Lookup an ERTS parameter in the !hipe.literals named metadata node.
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 40 of file X86FrameLowering.cpp.

Function Documentation

blockEndIsUnreachable()

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

static

Definition at line 3346 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 1221 of file X86FrameLowering.cpp.

Referenced by llvm::X86FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitPrologue(), 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 160 of file X86FrameLowering.cpp.

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

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

getADDriOpcode()

static unsigned getADDriOpcode ( bool  IsLP64 )

static

Definition at line 112 of file X86FrameLowering.cpp.

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

getADDrrOpcode()

static unsigned getADDrrOpcode ( bool  IsLP64 )

static

Definition at line 120 of file X86FrameLowering.cpp.

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

getANDriOpcode()

static unsigned getANDriOpcode ( bool  IsLP64, int64_t  Imm  )

static

Definition at line 124 of file X86FrameLowering.cpp.

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 3326 of file X86FrameLowering.cpp.

References llvm::NamedMDNode::getNumOperands(), llvm::NamedMDNode::getOperand(), llvm::MDString::getString(), llvm::ValueAsMetadata::getValue(), llvm::ConstantInt::getZExtValue(), and llvm::report_fatal_error().

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

getLEArOpcode()

static unsigned getLEArOpcode ( bool  IsLP64 )

static

Definition at line 128 of file X86FrameLowering.cpp.

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

getMOVriOpcode()

static unsigned getMOVriOpcode ( bool  Use64BitReg, int64_t  Imm  )

static

Definition at line 132 of file X86FrameLowering.cpp.

Referenced by llvm::X86FrameLowering::adjustForSegmentedStacks(), llvm::X86FrameLowering::emitPrologue(), 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 3050 of file X86FrameLowering.cpp.

References 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.

Referenced by llvm::X86FrameLowering::adjustForHiPEPrologue(), and llvm::X86FrameLowering::adjustForSegmentedStacks().

getSUBriOpcode()

static unsigned getSUBriOpcode ( bool  IsLP64 )

static

Definition at line 108 of file X86FrameLowering.cpp.

getSUBrrOpcode()

static unsigned getSUBrrOpcode ( bool  IsLP64 )

static

Definition at line 116 of file X86FrameLowering.cpp.

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

HasNestArgument()

static bool HasNestArgument ( const MachineFunction *  MF )

static

Definition at line 3035 of file X86FrameLowering.cpp.

References E, F, llvm::MachineFunction::getFunction(), and I.

Referenced by llvm::X86FrameLowering::adjustForSegmentedStacks(), and GetScratchRegister().

isEAXLiveIn()

static bool isEAXLiveIn ( MachineBasicBlock &  MBB )

static

Definition at line 143 of file X86FrameLowering.cpp.

References llvm::MachineBasicBlock::liveins(), and MBB.

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

isFuncletReturnInstr()

static bool isFuncletReturnInstr ( MachineInstr &  MI )

static

Definition at line 2206 of file X86FrameLowering.cpp.

References llvm_unreachable, and MI.

isTailCallOpcode()

static bool isTailCallOpcode ( unsigned  Opc )

static

Definition at line 2272 of file X86FrameLowering.cpp.

STATISTIC() [1/2]

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

STATISTIC() [2/2]

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

Variable Documentation

kSplitStackAvailable

const uint64_t kSplitStackAvailable = 256

static

Definition at line 3085 of file X86FrameLowering.cpp.