HexagonISelDAGToDAG.cpp File Reference

#include "HexagonISelDAGToDAG.h"
#include "Hexagon.h"
#include "HexagonISelLowering.h"
#include "HexagonMachineFunctionInfo.h"
#include "HexagonTargetMachine.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/IntrinsicsHexagon.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "HexagonGenDAGISel.inc"

Go to the source code of this file.

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.

Macros
#define	DEBUG_TYPE   "hexagon-isel"
#define	PASS_NAME   "Hexagon DAG->DAG Pattern Instruction Selection"
#define	GET_DAGISEL_BODY   HexagonDAGToDAGISel

Functions
FunctionPass *	llvm::createHexagonISelDag (HexagonTargetMachine &TM, CodeGenOptLevel OptLevel)
	createHexagonISelDag - This pass converts a legalized DAG into a Hexagon-specific DAG, ready for instruction scheduling.
static bool	isMemOPCandidate (SDNode *I, SDNode *U)
static bool	isOpcodeHandled (const SDNode *N)
static unsigned	getPowerOf2Factor (SDValue Val)
static bool	willShiftRightEliminate (SDValue V, unsigned Amount)
static bool	isTargetConstant (const SDValue &V)

Variables
static cl::opt< bool >	EnableAddressRebalancing ("isel-rebalance-addr", cl::Hidden, cl::init(true), cl::desc("Rebalance address calculation trees to improve " "instruction selection"))
static cl::opt< bool >	RebalanceOnlyForOptimizations ("rebalance-only-opt", cl::Hidden, cl::init(false), cl::desc("Rebalance address tree only if this allows optimizations"))
static cl::opt< bool >	RebalanceOnlyImbalancedTrees ("rebalance-only-imbal", cl::Hidden, cl::init(false), cl::desc("Rebalance address tree only if it is imbalanced"))
static cl::opt< bool >	CheckSingleUse ("hexagon-isel-su", cl::Hidden, cl::init(true), cl::desc("Enable checking of SDNode's single-use status"))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "hexagon-isel"

Definition at line 27 of file HexagonISelDAGToDAG.cpp.

GET_DAGISEL_BODY

#define GET_DAGISEL_BODY   HexagonDAGToDAGISel

Definition at line 55 of file HexagonISelDAGToDAG.cpp.

PASS_NAME

#define PASS_NAME   "Hexagon DAG->DAG Pattern Instruction Selection"

Definition at line 28 of file HexagonISelDAGToDAG.cpp.

Function Documentation

getPowerOf2Factor()

unsigned getPowerOf2Factor ( SDValue Val )

static

Returns

the value x for which 2^x is a factor of Val

Definition at line 1964 of file HexagonISelDAGToDAG.cpp.

References llvm::CallingConv::C, llvm::APInt::countr_zero(), llvm::dyn_cast(), llvm::APInt::getBoolValue(), llvm::SDValue::getConstantOperandVal(), llvm::SDValue::getNode(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::isa(), llvm::ISD::MUL, and llvm::ISD::SHL.

isMemOPCandidate()

bool isMemOPCandidate ( SDNode * I, SDNode * U )

static

Definition at line 1079 of file HexagonISelDAGToDAG.cpp.

References llvm::ISD::ADD, llvm::ISD::AND, llvm::cast(), llvm::SDValue::getNode(), llvm::SDNode::getNumValues(), llvm::SDNode::getOpcode(), llvm::SDNode::getOperand(), I, Opc, llvm::ISD::OR, S1, llvm::ISD::SUB, and llvm::SDNode::user_begin().

isOpcodeHandled()

bool isOpcodeHandled ( const SDNode * N )

static

Definition at line 1778 of file HexagonISelDAGToDAG.cpp.

References llvm::ISD::ADD, llvm::isa(), llvm::ISD::MUL, N, and llvm::ISD::SHL.

isTargetConstant()

bool isTargetConstant ( const SDValue & V )

static

Definition at line 2028 of file HexagonISelDAGToDAG.cpp.

References llvm::HexagonISD::CONST32, and llvm::HexagonISD::CONST32_GP.

willShiftRightEliminate()

bool willShiftRightEliminate ( SDValue V, unsigned Amount )

static

Returns

true if V>>Amount will eliminate V's operation on its child

Definition at line 1987 of file HexagonISelDAGToDAG.cpp.

References AbstractManglingParser< Derived, Alloc >::Ops, getNode(), llvm::isa(), llvm::ISD::MUL, and llvm::ISD::SHL.

Variable Documentation

CheckSingleUse

cl::opt< bool > CheckSingleUse("hexagon-isel-su", cl::Hidden, cl::init(true), cl::desc("Enable checking of SDNode's single-use status")) ( "hexagon-isel-su" , cl::Hidden , cl::init(true) , cl::desc("Enable checking of SDNode's single-use status")  )

static

EnableAddressRebalancing

cl::opt< bool > EnableAddressRebalancing("isel-rebalance-addr", cl::Hidden, cl::init(true), cl::desc("Rebalance address calculation trees to improve " "instruction selection")) ( "isel-rebalance-addr" , cl::Hidden , cl::init(true) , cl::desc("Rebalance address calculation trees to improve " "instruction selection")  )

static

Referenced by llvm::HexagonDAGToDAGISel::PreprocessISelDAG().

RebalanceOnlyForOptimizations

cl::opt< bool > RebalanceOnlyForOptimizations("rebalance-only-opt", cl::Hidden, cl::init(false), cl::desc("Rebalance address tree only if this allows optimizations")) ( "rebalance-only-opt" , cl::Hidden , cl::init(false) , cl::desc("Rebalance address tree only if this allows optimizations")  )

static

RebalanceOnlyImbalancedTrees

cl::opt< bool > RebalanceOnlyImbalancedTrees("rebalance-only-imbal", cl::Hidden, cl::init(false), cl::desc("Rebalance address tree only if it is imbalanced")) ( "rebalance-only-imbal" , cl::Hidden , cl::init(false) , cl::desc("Rebalance address tree only if it is imbalanced")  )

static