HexagonISelDAGToDAG.cpp File Reference

#include "Hexagon.h"
#include "HexagonISelDAGToDAG.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/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 class represents lattice values for constants.

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

Functions
FunctionPass *	llvm::createHexagonISelDag (HexagonTargetMachine &TM, CodeGenOpt::Level OptLevel)
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 26 of file HexagonISelDAGToDAG.cpp.

GET_DAGISEL_BODY

#define GET_DAGISEL_BODY   HexagonDAGToDAGISel

Definition at line 53 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 1786 of file HexagonISelDAGToDAG.cpp.

References C, llvm::APInt::countTrailingZeros(), llvm::dyn_cast(), llvm::ConstantSDNode::getAPIntValue(), llvm::APInt::getBoolValue(), llvm::SDValue::getConstantOperandVal(), llvm::SDValue::getNode(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::ISD::MUL, and llvm::ISD::SHL.

Referenced by isTargetConstant().

isMemOPCandidate()

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

static

Definition at line 934 of file HexagonISelDAGToDAG.cpp.

References llvm::ISD::ADD, llvm::ISD::AND, C, llvm::countLeadingZeros(), llvm::countTrailingOnes(), llvm::countTrailingZeros(), llvm::SelectionDAGISel::CurDAG, D, DC, llvm::dyn_cast(), E, llvm::ConstantSDNode::getAPIntValue(), llvm::APInt::getBitWidth(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getMachineNode(), llvm::SDNode::getMachineOpcode(), llvm::SDValue::getNode(), llvm::SelectionDAG::getNode(), llvm::SDNode::getNumOperands(), llvm::SDNode::getNumValues(), llvm::SDValue::getOpcode(), llvm::SDNode::getOpcode(), llvm::SDValue::getOperand(), llvm::SDNode::getOperand(), llvm::EVT::getSimpleVT(), llvm::SDValue::getValueType(), llvm::SDNode::getValueType(), llvm::ConstantSDNode::getZExtValue(), llvm::SDNode::hasOneUse(), I, llvm::MVT::i1, llvm::EVT::isInteger(), llvm::EVT::isSimple(), llvm::ISD::LOAD, llvm::BitmaskEnumDetail::Mask(), N, llvm::ISD::OR, llvm::SelectionDAG::ReplaceAllUsesWith(), llvm::SelectionDAGISel::ReplaceNode(), llvm::PPCISD::SC, llvm::ISD::SELECT, llvm::ISD::SHL, llvm::ISD::SRL, llvm::ISD::STORE, llvm::ISD::SUB, llvm::ARM_MB::SY, T1, llvm::SDNode::use_begin(), Y, and llvm::ISD::ZERO_EXTEND.

isOpcodeHandled()

static bool isOpcodeHandled ( const SDNode *  N )

static

Definition at line 1600 of file HexagonISelDAGToDAG.cpp.

References llvm::ISD::ADD, assert(), B, llvm::SmallVectorTemplateCommon< T >::begin(), llvm::MCID::Compare, llvm::SmallVectorBase::empty(), llvm::empty(), llvm::SmallVectorTemplateCommon< T >::end(), llvm::SmallVectorTemplateCommon< T >::front(), llvm::SDValue::getNode(), llvm::SDNode::getOpcode(), llvm::SDNode::getOperand(), llvm::ISD::MUL, N, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T >::push_back(), llvm::ISD::SHL, llvm::SmallVectorBase::size(), and llvm::size().

Referenced by isTargetConstant().

isTargetConstant()

static bool isTargetConstant ( const SDValue &  V )

static

Definition at line 1850 of file HexagonISelDAGToDAG.cpp.

References llvm::abs(), llvm::ISD::ADD, llvm::SelectionDAG::allnodes_begin(), llvm::SelectionDAG::allnodes_end(), assert(), llvm::HexagonISD::CONST32, llvm::HexagonISD::CONST32_GP, llvm::DenseMapBase< SmallDenseMap< KeyT, ValueT, InlineBuckets, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::count(), llvm::SelectionDAGISel::CurDAG, llvm::dbgs(), llvm::SDValue::dump(), llvm::SDNode::dump(), llvm::dyn_cast(), E, llvm::SmallVectorBase::empty(), llvm::ConstantSDNode::getAPIntValue(), llvm::SelectionDAG::getConstant(), llvm::SDValue::getConstantOperandVal(), llvm::SelectionDAG::getDataLayout(), llvm::MachineFunction::getFunction(), llvm::GlobalAddressSDNode::getGlobal(), llvm::SelectionDAG::getMachineFunction(), llvm::SDValue::getNode(), llvm::SelectionDAG::getNode(), llvm::GlobalAddressSDNode::getOffset(), llvm::SDValue::getOpcode(), llvm::SDNode::getOpcode(), llvm::SDValue::getOperand(), llvm::SDNode::getOperand(), llvm::GlobalValue::getParent(), getParent(), getPowerOf2Factor(), llvm::TargetLoweringBase::getScalarShiftAmountTy(), llvm::SelectionDAG::getTargetGlobalAddress(), llvm::SelectionDAGISel::getTargetLowering(), llvm::SDValue::getValueType(), llvm::SDNode::getValueType(), llvm::SDValue::hasOneUse(), llvm::SDNode::hasOneUse(), I, llvm::TargetLowering::isOffsetFoldingLegal(), isOpcodeHandled(), llvm::APInt::isPowerOf2(), LLVM_DEBUG, llvm::ISD::LOAD, llvm::APInt::logBase2(), llvm::max(), llvm::ISD::MUL, N, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorTemplateBase< T >::push_back(), RebalanceOnlyForOptimizations, RebalanceOnlyImbalancedTrees, llvm::SelectionDAG::RemoveDeadNodes(), llvm::SelectionDAG::ReplaceAllUsesWith(), llvm::ISD::SHL, llvm::ISD::STORE, std::swap(), llvm::SelectionDAGISel::TLI, llvm::SelectionDAG::UpdateNodeOperands(), llvm::SDNode::use_begin(), llvm::SDNode::use_size(), llvm::Value::users(), and willShiftRightEliminate().

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 1809 of file HexagonISelDAGToDAG.cpp.

References llvm::SelectionDAGISel::CurDAG, llvm::SelectionDAG::getConstant(), llvm::SDValue::getConstantOperandVal(), llvm::SelectionDAG::getNode(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::SDValue::getValueType(), llvm::ISD::MUL, and llvm::ISD::SHL.

Referenced by isTargetConstant().

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

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

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

Referenced by isTargetConstant().

RebalanceOnlyImbalancedTrees

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

static

Referenced by isTargetConstant().