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"

Include dependency graph for HexagonISelDAGToDAG.cpp:

Go to the source code of this file.

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

Macros
#define	DEBUG_TYPE   "hexagon-isel"
#define	GET_DAGISEL_BODY   HexagonDAGToDAGISel

Functions
FunctionPass *	llvm::createHexagonISelDag (HexagonTargetMachine &TM, CodeGenOpt::Level OptLevel)
	createHexagonISelDag - This pass converts a legalized DAG into a Hexagon-specific DAG, ready for instruction scheduling. More...
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 54 of file HexagonISelDAGToDAG.cpp.

Function Documentation

getPowerOf2Factor()

static unsigned getPowerOf2Factor ( SDValue  Val )

static

Returns

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

Definition at line 1807 of file HexagonISelDAGToDAG.cpp.

References llvm::APInt::countTrailingZeros(), llvm::APInt::getBoolValue(), llvm::SDValue::getConstantOperandVal(), llvm::SDValue::getNode(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), i, llvm::ISD::MUL, and llvm::ISD::SHL.

isMemOPCandidate()

static bool isMemOPCandidate ( SDNode *  I, SDNode *  U  )

static

Definition at line 941 of file HexagonISelDAGToDAG.cpp.

References llvm::ISD::ADD, llvm::ISD::AND, llvm::SDValue::getNode(), llvm::SDNode::getNumValues(), llvm::SDNode::getOpcode(), llvm::SDNode::getOperand(), llvm::SDNode::hasOneUse(), I, llvm::ISD::LOAD, llvm::ISD::OR, llvm::ISD::STORE, llvm::ISD::SUB, llvm::ARM_MB::SY, and llvm::SDNode::use_begin().

isOpcodeHandled()

static bool isOpcodeHandled ( const SDNode *  N )

static

Definition at line 1621 of file HexagonISelDAGToDAG.cpp.

References llvm::ISD::ADD, llvm::ISD::MUL, N, and llvm::ISD::SHL.

isTargetConstant()

static bool isTargetConstant ( const SDValue &  V )

static

Definition at line 1871 of file HexagonISelDAGToDAG.cpp.

References llvm::HexagonISD::CONST32, llvm::HexagonISD::CONST32_GP, and llvm::SDValue::getOpcode().

willShiftRightEliminate()

static bool willShiftRightEliminate ( SDValue  V, unsigned  Amount  )

static

Returns

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

Definition at line 1830 of file HexagonISelDAGToDAG.cpp.

References llvm::SDValue::getConstantOperandVal(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), i, 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"))

static

EnableAddressRebalancing

cl::opt<bool> EnableAddressRebalancing("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"))

static

RebalanceOnlyImbalancedTrees

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

static