MipsConstantIslandPass.cpp File Reference

#include "Mips.h"
#include "MCTargetDesc/MipsBaseInfo.h"
#include "Mips16InstrInfo.h"
#include "MipsMachineFunction.h"
#include "MipsTargetMachine.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include <algorithm>

Include dependency graph for MipsConstantIslandPass.cpp:

Go to the source code of this file.

Defines
#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 bool	isUnconditionalBranch (unsigned int Opcode)
static unsigned int	longformBranchOpcode (unsigned int Opcode)
static unsigned int	branchMaxOffsets (unsigned int Opcode)
static bool	BBHasFallthrough (MachineBasicBlock *MBB)
static bool	CompareMBBNumbers (const MachineBasicBlock *LHS, const MachineBasicBlock *RHS)
static bool	BBIsJumpedOver (MachineBasicBlock *MBB)
static unsigned	getUnconditionalBrDisp (int Opc)
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)

---

Define Documentation

#define DEBUG_TYPE   "mips-constant-islands"

Definition at line 49 of file MipsConstantIslandPass.cpp.

---

Function Documentation

static bool BBHasFallthrough

(

MachineBasicBlock *

MBB

)

[static]

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

Definition at line 605 of file MipsConstantIslandPass.cpp.

References llvm::MachineFunction::end(), llvm::MachineBasicBlock::getParent(), I, llvm::MachineBasicBlock::succ_begin(), and llvm::MachineBasicBlock::succ_end().

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 1036 of file MipsConstantIslandPass.cpp.

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

static unsigned int branchMaxOffsets

(

unsigned int

Opcode

)

[static]

Definition at line 139 of file MipsConstantIslandPass.cpp.

References llvm::tgtok::Bits, and llvm_unreachable.

static unsigned int branchTargetOperand

(

MachineInstr *

MI

)

[static]

Definition at line 81 of file MipsConstantIslandPass.cpp.

References llvm::MachineInstr::getOpcode(), and llvm_unreachable.

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

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

Definition at line 849 of file MipsConstantIslandPass.cpp.

References llvm::MachineBasicBlock::getNumber().

static unsigned getUnconditionalBrDisp

(

int

Opc

)

[inline, static]

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

Definition at line 1185 of file MipsConstantIslandPass.cpp.

static bool isUnconditionalBranch

(

unsigned int

Opcode

)

[static]

Definition at line 100 of file MipsConstantIslandPass.cpp.

static unsigned int longformBranchOpcode

(

unsigned int

Opcode

)

[static]

Definition at line 110 of file MipsConstantIslandPass.cpp.

References llvm_unreachable.

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"
	)

---

Variable Documentation

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) [static]