MipsConstantIslandPass.cpp File Reference

#include "Mips.h"
#include "Mips16InstrInfo.h"
#include "MipsMachineFunction.h"
#include "MipsSubtarget.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstdint>
#include <iterator>
#include <vector>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "mips-constant-islands"

Functions
	STATISTIC (NumCPEs, "Number of constpool entries")
	STATISTIC (NumSplit, "Number of uncond branches inserted")
	STATISTIC (NumCBrFixed, "Number of cond branches fixed")
	STATISTIC (NumUBrFixed, "Number of uncond branches fixed")
static unsigned int	branchTargetOperand (MachineInstr *MI)
static unsigned int	longformBranchOpcode (unsigned int Opcode)
static unsigned int	branchMaxOffsets (unsigned int Opcode)
static bool	BBHasFallthrough (MachineBasicBlock *MBB)
	BBHasFallthrough - Return true if the specified basic block can fallthrough into the block immediately after it.
static bool	CompareMBBNumbers (const MachineBasicBlock *LHS, const MachineBasicBlock *RHS)
	CompareMBBNumbers - Little predicate function to sort the WaterList by MBB ID.
static bool	BBIsJumpedOver (MachineBasicBlock *MBB)
	BBIsJumpedOver - Return true of the specified basic block's only predecessor unconditionally branches to its only successor.
static unsigned	getUnconditionalBrDisp (int Opc)
	getUnconditionalBrDisp - Returns the maximum displacement that can fit in the specific unconditional branch instruction.

Variables
static cl::opt< bool >	AlignConstantIslands ("mips-align-constant-islands", cl::Hidden, cl::init(true), cl::desc("Align constant islands in code"))
static cl::opt< int >	ConstantIslandsSmallOffset ("mips-constant-islands-small-offset", cl::init(0), cl::desc("Make small offsets be this amount for testing purposes"), cl::Hidden)
static cl::opt< bool >	NoLoadRelaxation ("mips-constant-islands-no-load-relaxation", cl::init(false), cl::desc("Don't relax loads to long loads - for testing purposes"), cl::Hidden)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "mips-constant-islands"

Definition at line 57 of file MipsConstantIslandPass.cpp.

Function Documentation

BBHasFallthrough()

bool ARMConstantIslands::BBHasFallthrough ( MachineBasicBlock *  MBB )

static

BBHasFallthrough - Return true if the specified basic block can fallthrough into the block immediately after it.

Definition at line 585 of file MipsConstantIslandPass.cpp.

References llvm::MachineFunction::end(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineBasicBlock::getParent(), llvm::is_contained(), MBB, MBBI, and llvm::MachineBasicBlock::successors().

BBIsJumpedOver()

static bool BBIsJumpedOver ( MachineBasicBlock *  MBB )

static

BBIsJumpedOver - Return true of the specified basic block's only predecessor unconditionally branches to its only successor.

Definition at line 991 of file MipsConstantIslandPass.cpp.

References llvm::MachineBasicBlock::back(), llvm::MachineOperand::getMBB(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), MBB, llvm::MachineBasicBlock::pred_begin(), llvm::MachineBasicBlock::pred_size(), llvm::MachineBasicBlock::succ_begin(), and llvm::MachineBasicBlock::succ_size().

branchMaxOffsets()

static unsigned int branchMaxOffsets ( unsigned int  Opcode )

static

Definition at line 131 of file MipsConstantIslandPass.cpp.

References llvm_unreachable.

branchTargetOperand()

static unsigned int branchTargetOperand ( MachineInstr *  MI )

static

Definition at line 85 of file MipsConstantIslandPass.cpp.

References llvm_unreachable, and MI.

CompareMBBNumbers()

static bool CompareMBBNumbers ( const MachineBasicBlock *  LHS, const MachineBasicBlock *  RHS  )

static

CompareMBBNumbers - Little predicate function to sort the WaterList by MBB ID.

Definition at line 810 of file MipsConstantIslandPass.cpp.

References LHS, and RHS.

getUnconditionalBrDisp()

static unsigned getUnconditionalBrDisp ( int  Opc )

inlinestatic

getUnconditionalBrDisp - Returns the maximum displacement that can fit in the specific unconditional branch instruction.

Definition at line 1139 of file MipsConstantIslandPass.cpp.

References Opc.

longformBranchOpcode()

static unsigned int longformBranchOpcode ( unsigned int  Opcode )

static

Definition at line 104 of file MipsConstantIslandPass.cpp.

References llvm_unreachable.

STATISTIC() [1/4]

STATISTIC	(	NumCBrFixed	,
		"Number of cond branches fixed"
	)

STATISTIC() [2/4]

STATISTIC	(	NumCPEs	,
		"Number of constpool entries"
	)

STATISTIC() [3/4]

STATISTIC	(	NumSplit	,
		"Number of uncond branches inserted"
	)

STATISTIC() [4/4]

STATISTIC	(	NumUBrFixed	,
		"Number of uncond branches fixed"
	)

Variable Documentation

AlignConstantIslands

cl::opt< bool > AlignConstantIslands("mips-align-constant-islands", cl::Hidden, cl::init(true), cl::desc("Align constant islands in code")) ( "mips-align-constant-islands"  , cl::Hidden  , cl::init(true)  , cl::desc("Align constant islands in code")    )

static

ConstantIslandsSmallOffset

cl::opt< int > ConstantIslandsSmallOffset("mips-constant-islands-small-offset", cl::init(0), cl::desc("Make small offsets be this amount for testing purposes"), cl::Hidden) ( "mips-constant-islands-small-offset"  , cl::init(0)  , cl::desc("Make small offsets be this amount for testing purposes")  , cl::Hidden    )

static

NoLoadRelaxation

cl::opt< bool > NoLoadRelaxation("mips-constant-islands-no-load-relaxation", cl::init(false), cl::desc("Don't relax loads to long loads - for testing purposes"), cl::Hidden) ( "mips-constant-islands-no-load-relaxation"  , cl::init(false)  , cl::desc("Don't relax loads to long loads - for testing purposes")  , cl::Hidden    )

static