LLVM  9.0.0svn
Macros | Functions
X86FixupLEAs.cpp File Reference
#include "X86.h"
#include "X86InstrInfo.h"
#include "X86Subtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetSchedule.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
Include dependency graph for X86FixupLEAs.cpp:

Go to the source code of this file.

Macros

#define FIXUPLEA_DESC   "X86 LEA Fixup"
 
#define FIXUPLEA_NAME   "x86-fixup-LEAs"
 
#define DEBUG_TYPE   FIXUPLEA_NAME
 

Functions

 STATISTIC (NumLEAs, "Number of LEA instructions created")
 
static bool isLEA (unsigned Opcode)
 
static bool getPreviousInstr (MachineBasicBlock::iterator &I, MachineBasicBlock &MBB)
 getPreviousInstr - Given a reference to an instruction in a basic block, return a reference to the previous instruction in the block, wrapping around to the last instruction of the block if the block branches to itself. More...
 
static bool isInefficientLEAReg (unsigned Reg)
 
static bool isRegOperand (const MachineOperand &Op)
 
static bool hasInefficientLEABaseReg (const MachineOperand &Base, const MachineOperand &Index)
 Returns true if this LEA uses base an index registers, and the base register is known to be inefficient for the subtarget. More...
 
static bool hasLEAOffset (const MachineOperand &Offset)
 
static unsigned getADDrrFromLEA (unsigned LEAOpcode)
 
static unsigned getADDriFromLEA (unsigned LEAOpcode, const MachineOperand &Offset)
 
static bool isLEASimpleIncOrDec (MachineInstr &LEA)
 isLEASimpleIncOrDec - Does this LEA have one these forms: lea reg, 1(reg) lea reg, -1(reg) More...
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   FIXUPLEA_NAME

Definition at line 30 of file X86FixupLEAs.cpp.

◆ FIXUPLEA_DESC

#define FIXUPLEA_DESC   "X86 LEA Fixup"

Definition at line 27 of file X86FixupLEAs.cpp.

◆ FIXUPLEA_NAME

#define FIXUPLEA_NAME   "x86-fixup-LEAs"

Definition at line 28 of file X86FixupLEAs.cpp.

Function Documentation

◆ getADDriFromLEA()

static unsigned getADDriFromLEA ( unsigned  LEAOpcode,
const MachineOperand Offset 
)
inlinestatic

◆ getADDrrFromLEA()

static unsigned getADDrrFromLEA ( unsigned  LEAOpcode)
inlinestatic

Definition at line 321 of file X86FixupLEAs.cpp.

References llvm_unreachable.

Referenced by isLEASimpleIncOrDec().

◆ getPreviousInstr()

static bool getPreviousInstr ( MachineBasicBlock::iterator I,
MachineBasicBlock MBB 
)
inlinestatic

getPreviousInstr - Given a reference to an instruction in a basic block, return a reference to the previous instruction in the block, wrapping around to the last instruction of the block if the block branches to itself.

Definition at line 261 of file X86FixupLEAs.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineBasicBlock::end(), I, and llvm::MachineBasicBlock::isPredecessor().

◆ hasInefficientLEABaseReg()

static bool hasInefficientLEABaseReg ( const MachineOperand Base,
const MachineOperand Index 
)
inlinestatic

Returns true if this LEA uses base an index registers, and the base register is known to be inefficient for the subtarget.

Definition at line 311 of file X86FixupLEAs.cpp.

References llvm::MachineOperand::getReg(), isInefficientLEAReg(), llvm::MachineOperand::isReg(), and isRegOperand().

Referenced by isLEASimpleIncOrDec().

◆ hasLEAOffset()

static bool hasLEAOffset ( const MachineOperand Offset)
inlinestatic

◆ isInefficientLEAReg()

static bool isInefficientLEAReg ( unsigned  Reg)
inlinestatic

Definition at line 298 of file X86FixupLEAs.cpp.

Referenced by hasInefficientLEABaseReg(), and isLEASimpleIncOrDec().

◆ isLEA()

static bool isLEA ( unsigned  Opcode)
static

◆ isLEASimpleIncOrDec()

static bool isLEASimpleIncOrDec ( MachineInstr LEA)
inlinestatic

◆ isRegOperand()

static bool isRegOperand ( const MachineOperand Op)
inlinestatic

◆ STATISTIC()

STATISTIC ( NumLEAs  ,
"Number of LEA instructions created"   
)