SelectionDAGISel.cpp File Reference

#include "llvm/CodeGen/SelectionDAGISel.h"
#include "ScheduleDAGSDNodes.h"
#include "SelectionDAGBuilder.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/CFG.h"
#include "llvm/Analysis/LazyBlockFrequencyInfo.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/UniformityAnalysis.h"
#include "llvm/CodeGen/AssignmentTrackingAnalysis.h"
#include "llvm/CodeGen/CodeGenCommonISel.h"
#include "llvm/CodeGen/FastISel.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/GCMetadata.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachinePassRegistry.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MachineValueType.h"
#include "llvm/CodeGen/SchedulerRegistry.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/StackMaps.h"
#include "llvm/CodeGen/StackProtector.h"
#include "llvm/CodeGen/SwiftErrorValueTracking.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/CodeGen/WinEHFuncInfo.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/EHPersonalities.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/IntrinsicsWebAssembly.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Statepoint.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/InitializePasses.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/Pass.h"
#include "llvm/Support/BranchProbability.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetIntrinsicInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iterator>
#include <limits>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>

Go to the source code of this file.

Classes
class	llvm::OptLevelChanger
	This class is used by SelectionDAGISel to temporarily override the optimization level on a per-function basis. More...

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

Macros
#define	DEBUG_TYPE   "isel"

Functions
	STATISTIC (NumFastIselFailures, "Number of instructions fast isel failed on")
	STATISTIC (NumFastIselSuccess, "Number of instructions fast isel selected")
	STATISTIC (NumFastIselBlocks, "Number of blocks selected entirely by fast isel")
	STATISTIC (NumDAGBlocks, "Number of blocks selected using DAG")
	STATISTIC (NumDAGIselRetries,"Number of times dag isel has to try another path")
	STATISTIC (NumEntryBlocks, "Number of entry blocks encountered")
	STATISTIC (NumFastIselFailLowerArguments, "Number of entry blocks where fast isel failed to lower arguments")
ScheduleDAGSDNodes *	llvm::createDefaultScheduler (SelectionDAGISel *IS, CodeGenOptLevel OptLevel)
	createDefaultScheduler - This creates an instruction scheduler appropriate for the target.
static void	computeUsesMSVCFloatingPoint (const Triple &TT, const Function &F, MachineModuleInfo &MMI)
static void	reportFastISelFailure (MachineFunction &MF, OptimizationRemarkEmitter &ORE, OptimizationRemarkMissed &R, bool ShouldAbort)
static bool	hasExceptionPointerOrCodeUser (const CatchPadInst *CPI)
static void	mapWasmLandingPadIndex (MachineBasicBlock *MBB, const CatchPadInst *CPI)
static bool	isFoldedOrDeadInstruction (const Instruction *I, const FunctionLoweringInfo &FuncInfo)
	isFoldedOrDeadInstruction - Return true if the specified instruction is side-effect free and is either dead or folded into a generated instruction.
static bool	processIfEntryValueDbgDeclare (FunctionLoweringInfo &FuncInfo, const Value *Arg, DIExpression *Expr, DILocalVariable *Var, DebugLoc DbgLoc)
static bool	processDbgDeclare (FunctionLoweringInfo &FuncInfo, const Value *Address, DIExpression *Expr, DILocalVariable *Var, DebugLoc DbgLoc)
static void	processDbgDeclares (FunctionLoweringInfo &FuncInfo)
	Collect llvm.dbg.declare information.
static void	processSingleLocVars (FunctionLoweringInfo &FuncInfo, FunctionVarLocs const *FnVarLocs)
	Collect single location variable information generated with assignment tracking.
static SDNode *	findGlueUse (SDNode *N)
	findGlueUse - Return use of MVT::Glue value produced by the specified SDNode.
static bool	findNonImmUse (SDNode *Root, SDNode *Def, SDNode *ImmedUse, bool IgnoreChains)
	findNonImmUse - Return true if "Def" is a predecessor of "Root" via a path beyond "ImmedUse".
static LLVM_ATTRIBUTE_ALWAYS_INLINE uint64_t	GetVBR (uint64_t Val, const unsigned char *MatcherTable, unsigned &Idx)
	GetVBR - decode a vbr encoding whose top bit is set.
static SDValue	HandleMergeInputChains (SmallVectorImpl< SDNode * > &ChainNodesMatched, SelectionDAG *CurDAG)
	HandleMergeInputChains - This implements the OPC_EmitMergeInputChains operation for when the pattern matched at least one node with a chains.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckSame (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const SmallVectorImpl< std::pair< SDValue, SDNode * > > &RecordedNodes)
	CheckSame - Implements OP_CheckSame.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckChildSame (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const SmallVectorImpl< std::pair< SDValue, SDNode * > > &RecordedNodes, unsigned ChildNo)
	CheckChildSame - Implements OP_CheckChildXSame.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckPatternPredicate (const unsigned char *MatcherTable, unsigned &MatcherIndex, const SelectionDAGISel &SDISel, bool TwoBytePredNo)
	CheckPatternPredicate - Implements OP_CheckPatternPredicate.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckNodePredicate (const unsigned char *MatcherTable, unsigned &MatcherIndex, const SelectionDAGISel &SDISel, SDNode *N)
	CheckNodePredicate - Implements OP_CheckNodePredicate.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckOpcode (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDNode *N)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckType (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const TargetLowering *TLI, const DataLayout &DL)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckChildType (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const TargetLowering *TLI, const DataLayout &DL, unsigned ChildNo)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckCondCode (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckChild2CondCode (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckValueType (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const TargetLowering *TLI, const DataLayout &DL)
static uint64_t	decodeSignRotatedValue (uint64_t V)
	Decode a signed value stored with the sign bit in the LSB for dense VBR encoding.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckInteger (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckChildInteger (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, unsigned ChildNo)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckAndImm (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const SelectionDAGISel &SDISel)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckOrImm (const unsigned char *MatcherTable, unsigned &MatcherIndex, SDValue N, const SelectionDAGISel &SDISel)
static unsigned	IsPredicateKnownToFail (const unsigned char *Table, unsigned Index, SDValue N, bool &Result, const SelectionDAGISel &SDISel, SmallVectorImpl< std::pair< SDValue, SDNode * > > &RecordedNodes)
	IsPredicateKnownToFail - If we know how and can do so without pushing a scope, evaluate the current node.

Variables
static cl::opt< int >	EnableFastISelAbort ("fast-isel-abort", cl::Hidden, cl::desc("Enable abort calls when \"fast\" instruction selection " "fails to lower an instruction: 0 disable the abort, 1 will " "abort but for args, calls and terminators, 2 will also " "abort for argument lowering, and 3 will never fallback " "to SelectionDAG."))
static cl::opt< bool >	EnableFastISelFallbackReport ("fast-isel-report-on-fallback", cl::Hidden, cl::desc("Emit a diagnostic when \"fast\" instruction selection " "falls back to SelectionDAG."))
static cl::opt< bool >	UseMBPI ("use-mbpi", cl::desc("use Machine Branch Probability Info"), cl::init(true), cl::Hidden)
static cl::opt< std::string >	FilterDAGBasicBlockName ("filter-view-dags", cl::Hidden, cl::desc("Only display the basic block whose name " "matches this for all view-*-dags options"))
static cl::opt< bool >	ViewDAGCombine1 ("view-dag-combine1-dags", cl::Hidden, cl::desc("Pop up a window to show dags before the first " "dag combine pass"))
static cl::opt< bool >	ViewLegalizeTypesDAGs ("view-legalize-types-dags", cl::Hidden, cl::desc("Pop up a window to show dags before legalize types"))
static cl::opt< bool >	ViewDAGCombineLT ("view-dag-combine-lt-dags", cl::Hidden, cl::desc("Pop up a window to show dags before the post " "legalize types dag combine pass"))
static cl::opt< bool >	ViewLegalizeDAGs ("view-legalize-dags", cl::Hidden, cl::desc("Pop up a window to show dags before legalize"))
static cl::opt< bool >	ViewDAGCombine2 ("view-dag-combine2-dags", cl::Hidden, cl::desc("Pop up a window to show dags before the second " "dag combine pass"))
static cl::opt< bool >	ViewISelDAGs ("view-isel-dags", cl::Hidden, cl::desc("Pop up a window to show isel dags as they are selected"))
static cl::opt< bool >	ViewSchedDAGs ("view-sched-dags", cl::Hidden, cl::desc("Pop up a window to show sched dags as they are processed"))
static cl::opt< bool >	ViewSUnitDAGs ("view-sunit-dags", cl::Hidden, cl::desc("Pop up a window to show SUnit dags after they are processed"))
static cl::opt< RegisterScheduler::FunctionPassCtor, false, RegisterPassParser< RegisterScheduler > >	ISHeuristic ("pre-RA-sched", cl::init(&createDefaultScheduler), cl::Hidden, cl::desc("Instruction schedulers available (before register" " allocation):"))
	ISHeuristic command line option for instruction schedulers.
static RegisterScheduler	defaultListDAGScheduler ("default", "Best scheduler for the target", createDefaultScheduler)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "isel"

Definition at line 115 of file SelectionDAGISel.cpp.

Function Documentation

CheckAndImm()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckAndImm ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const SelectionDAGISel &  SDISel  )

static

Definition at line 2756 of file SelectionDAGISel.cpp.

References llvm::ISD::AND, llvm::CallingConv::C, llvm::SelectionDAGISel::CheckAndMask(), GetVBR(), and N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckChild2CondCode()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckChild2CondCode ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N  )

static

Definition at line 2705 of file SelectionDAGISel.cpp.

References N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckChildInteger()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckChildInteger ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, unsigned  ChildNo  )

static

Definition at line 2748 of file SelectionDAGISel.cpp.

References N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckChildSame()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckChildSame ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const SmallVectorImpl< std::pair< SDValue, SDNode * > > &  RecordedNodes, unsigned  ChildNo  )

static

CheckChildSame - Implements OP_CheckChildXSame.

Definition at line 2642 of file SelectionDAGISel.cpp.

References N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckChildType()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckChildType ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const TargetLowering *  TLI, const DataLayout &  DL, unsigned  ChildNo  )

static

Definition at line 2688 of file SelectionDAGISel.cpp.

References DL, and N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckCondCode()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckCondCode ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N  )

static

Definition at line 2698 of file SelectionDAGISel.cpp.

References N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckInteger()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckInteger ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N  )

static

Definition at line 2735 of file SelectionDAGISel.cpp.

References llvm::CallingConv::C, decodeSignRotatedValue(), GetVBR(), and N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckNodePredicate()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckNodePredicate ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, const SelectionDAGISel &  SDISel, SDNode *  N  )

static

CheckNodePredicate - Implements OP_CheckNodePredicate.

Definition at line 2664 of file SelectionDAGISel.cpp.

References llvm::SelectionDAGISel::CheckNodePredicate(), and N.

Referenced by IsPredicateKnownToFail().

CheckOpcode()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckOpcode ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDNode *  N  )

static

Definition at line 2670 of file SelectionDAGISel.cpp.

References N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckOrImm()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckOrImm ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const SelectionDAGISel &  SDISel  )

static

Definition at line 2769 of file SelectionDAGISel.cpp.

References llvm::CallingConv::C, llvm::SelectionDAGISel::CheckOrMask(), GetVBR(), N, and llvm::ISD::OR.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckPatternPredicate()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckPatternPredicate ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, const SelectionDAGISel &  SDISel, bool  TwoBytePredNo  )

static

CheckPatternPredicate - Implements OP_CheckPatternPredicate.

Definition at line 2654 of file SelectionDAGISel.cpp.

References llvm::SelectionDAGISel::CheckPatternPredicate().

Referenced by IsPredicateKnownToFail().

CheckSame()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckSame ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const SmallVectorImpl< std::pair< SDValue, SDNode * > > &  RecordedNodes  )

static

CheckSame - Implements OP_CheckSame.

Definition at line 2633 of file SelectionDAGISel.cpp.

References assert(), and N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckType()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckType ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const TargetLowering *  TLI, const DataLayout &  DL  )

static

Definition at line 2678 of file SelectionDAGISel.cpp.

References DL, llvm::TargetLoweringBase::getPointerTy(), and N.

Referenced by llvm::getPointersDiff(), llvm::isConsecutiveAccess(), IsPredicateKnownToFail(), ProfileExistsOpInit(), ProfileIsAOpInit(), and llvm::SelectionDAGISel::SelectCodeCommon().

CheckValueType()

static LLVM_ATTRIBUTE_ALWAYS_INLINE bool CheckValueType ( const unsigned char *  MatcherTable, unsigned &  MatcherIndex, SDValue  N, const TargetLowering *  TLI, const DataLayout &  DL  )

static

Definition at line 2713 of file SelectionDAGISel.cpp.

References DL, llvm::TargetLoweringBase::getPointerTy(), and N.

Referenced by IsPredicateKnownToFail(), and llvm::SelectionDAGISel::SelectCodeCommon().

computeUsesMSVCFloatingPoint()

static void computeUsesMSVCFloatingPoint ( const Triple &  TT, const Function &  F, MachineModuleInfo &  MMI  )

static

Definition at line 358 of file SelectionDAGISel.cpp.

References F, I, instructions, llvm::MachineModuleInfo::setUsesMSVCFloatingPoint(), and llvm::MachineModuleInfo::usesMSVCFloatingPoint().

Referenced by llvm::SelectionDAGISel::runOnMachineFunction().

decodeSignRotatedValue()

uint64_t BitcodeReader::decodeSignRotatedValue ( uint64_t  V )

static

Decode a signed value stored with the sign bit in the LSB for dense VBR encoding.

Definition at line 2725 of file SelectionDAGISel.cpp.

Referenced by CheckInteger(), and llvm::SelectionDAGISel::SelectCodeCommon().

findGlueUse()

static SDNode * findGlueUse ( SDNode *  N )

static

findGlueUse - Return use of MVT::Glue value produced by the specified SDNode.

Definition at line 2129 of file SelectionDAGISel.cpp.

References E, llvm::Use::getUser(), I, and N.

Referenced by llvm::SelectionDAGISel::IsLegalToFold().

findNonImmUse()

static bool findNonImmUse ( SDNode *  Root, SDNode *  Def, SDNode *  ImmedUse, bool  IgnoreChains  )

static

findNonImmUse - Return true if "Def" is a predecessor of "Root" via a path beyond "ImmedUse".

We may ignore chains as they are checked separately.

Definition at line 2141 of file SelectionDAGISel.cpp.

References llvm::SDNode::hasPredecessorHelper(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::SDNode::isOnlyUserOf(), N, llvm::SDNode::op_values(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by llvm::SelectionDAGISel::IsLegalToFold().

GetVBR()

static LLVM_ATTRIBUTE_ALWAYS_INLINE uint64_t GetVBR ( uint64_t  Val, const unsigned char *  MatcherTable, unsigned &  Idx  )

static

GetVBR - decode a vbr encoding whose top bit is set.

Definition at line 2429 of file SelectionDAGISel.cpp.

References assert(), and Idx.

Referenced by CheckAndImm(), CheckInteger(), CheckOrImm(), and llvm::SelectionDAGISel::SelectCodeCommon().

HandleMergeInputChains()

static SDValue HandleMergeInputChains ( SmallVectorImpl< SDNode * > &  ChainNodesMatched, SelectionDAG *  CurDAG  )

static

HandleMergeInputChains - This implements the OPC_EmitMergeInputChains operation for when the pattern matched at least one node with a chains.

The input vector contains a list of all of the chained nodes that we match. We must determine if this is a valid thing to cover (i.e. matching it won't induce cycles in the DAG) and if so, creating a TokenFactor node. that will be used as the input node chain for the generated nodes.

Definition at line 2512 of file SelectionDAGISel.cpp.

References llvm::SmallPtrSetImplBase::clear(), llvm::SmallVectorBase< Size_T >::empty(), llvm::ISD::EntryToken, llvm::SelectionDAG::getEntryNode(), llvm::SelectionDAG::getNode(), llvm::SDNode::hasPredecessorHelper(), llvm::SmallPtrSetImpl< PtrType >::insert(), N, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorBase< Size_T >::size(), and llvm::ISD::TokenFactor.

Referenced by llvm::SelectionDAGISel::SelectCodeCommon().

hasExceptionPointerOrCodeUser()

static bool hasExceptionPointerOrCodeUser ( const CatchPadInst *  CPI )

static

Definition at line 1189 of file SelectionDAGISel.cpp.

References llvm::Value::users().

isFoldedOrDeadInstruction()

static bool isFoldedOrDeadInstruction ( const Instruction *  I, const FunctionLoweringInfo &  FuncInfo  )

static

isFoldedOrDeadInstruction - Return true if the specified instruction is side-effect free and is either dead or folded into a generated instruction.

Return false if it needs to be emitted.

Definition at line 1336 of file SelectionDAGISel.cpp.

References I, and llvm::FunctionLoweringInfo::isExportedInst().

IsPredicateKnownToFail()

static unsigned IsPredicateKnownToFail ( const unsigned char *  Table, unsigned  Index, SDValue  N, bool &  Result, const SelectionDAGISel &  SDISel, SmallVectorImpl< std::pair< SDValue, SDNode * > > &  RecordedNodes  )

static

IsPredicateKnownToFail - If we know how and can do so without pushing a scope, evaluate the current node.

If the current predicate is known to fail, set Result=true and return anything. If the current predicate is known to pass, set Result=false and return the MatcherIndex to continue with. If the current predicate is unknown, set Result=false and return the MatcherIndex to continue with.

Definition at line 2787 of file SelectionDAGISel.cpp.

References CheckAndImm(), CheckChild2CondCode(), CheckChildInteger(), CheckChildSame(), CheckChildType(), CheckCondCode(), CheckInteger(), CheckNodePredicate(), CheckOpcode(), CheckOrImm(), CheckPatternPredicate(), CheckSame(), CheckType(), CheckValueType(), llvm::SelectionDAGISel::CurDAG, llvm::SelectionDAG::getDataLayout(), N, llvm::SelectionDAGISel::OPC_CheckAndImm, llvm::SelectionDAGISel::OPC_CheckChild0Integer, llvm::SelectionDAGISel::OPC_CheckChild0Same, llvm::SelectionDAGISel::OPC_CheckChild0Type, llvm::SelectionDAGISel::OPC_CheckChild1Integer, llvm::SelectionDAGISel::OPC_CheckChild1Same, llvm::SelectionDAGISel::OPC_CheckChild1Type, llvm::SelectionDAGISel::OPC_CheckChild2CondCode, llvm::SelectionDAGISel::OPC_CheckChild2Integer, llvm::SelectionDAGISel::OPC_CheckChild2Same, llvm::SelectionDAGISel::OPC_CheckChild2Type, llvm::SelectionDAGISel::OPC_CheckChild3Integer, llvm::SelectionDAGISel::OPC_CheckChild3Same, llvm::SelectionDAGISel::OPC_CheckChild3Type, llvm::SelectionDAGISel::OPC_CheckChild4Integer, llvm::SelectionDAGISel::OPC_CheckChild4Type, llvm::SelectionDAGISel::OPC_CheckChild5Type, llvm::SelectionDAGISel::OPC_CheckChild6Type, llvm::SelectionDAGISel::OPC_CheckChild7Type, llvm::SelectionDAGISel::OPC_CheckCondCode, llvm::SelectionDAGISel::OPC_CheckInteger, llvm::SelectionDAGISel::OPC_CheckOpcode, llvm::SelectionDAGISel::OPC_CheckOrImm, llvm::SelectionDAGISel::OPC_CheckPatternPredicate, llvm::SelectionDAGISel::OPC_CheckPatternPredicate2, llvm::SelectionDAGISel::OPC_CheckPredicate, llvm::SelectionDAGISel::OPC_CheckSame, llvm::SelectionDAGISel::OPC_CheckType, llvm::SelectionDAGISel::OPC_CheckTypeRes, llvm::SelectionDAGISel::OPC_CheckValueType, and llvm::SelectionDAGISel::TLI.

Referenced by llvm::SelectionDAGISel::SelectCodeCommon().

mapWasmLandingPadIndex()

static void mapWasmLandingPadIndex ( MachineBasicBlock *  MBB, const CatchPadInst *  CPI  )

static

Definition at line 1204 of file SelectionDAGISel.cpp.

References llvm::FuncletPadInst::arg_size(), assert(), llvm::FuncletPadInst::getArgOperand(), llvm::MachineBasicBlock::getParent(), MBB, llvm::MachineFunction::setWasmLandingPadIndex(), and llvm::Value::users().

processDbgDeclare()

static bool processDbgDeclare ( FunctionLoweringInfo &  FuncInfo, const Value *  Address, DIExpression *  Expr, DILocalVariable *  Var, DebugLoc  DbgLoc  )

static

Definition at line 1371 of file SelectionDAGISel.cpp.

References llvm::Address, llvm::DIExpression::ApplyOffset, assert(), llvm::dbgs(), DL, llvm::FunctionLoweringInfo::getArgumentFrameIndex(), llvm::MachineFunction::getDataLayout(), LLVM_DEBUG, llvm::FunctionLoweringInfo::MF, llvm::Offset, llvm::DIExpression::prepend(), processIfEntryValueDbgDeclare(), llvm::MachineFunction::setVariableDbgInfo(), and llvm::FunctionLoweringInfo::StaticAllocaMap.

Referenced by processDbgDeclares(), and processSingleLocVars().

processDbgDeclares()

static void processDbgDeclares ( FunctionLoweringInfo &  FuncInfo )

static

Collect llvm.dbg.declare information.

This is done after argument lowering in case the declarations refer to arguments.

Definition at line 1421 of file SelectionDAGISel.cpp.

References llvm::FunctionLoweringInfo::Fn, I, instructions, llvm::FunctionLoweringInfo::PreprocessedDbgDeclares, and processDbgDeclare().

processIfEntryValueDbgDeclare()

static bool processIfEntryValueDbgDeclare ( FunctionLoweringInfo &  FuncInfo, const Value *  Arg, DIExpression *  Expr, DILocalVariable *  Var, DebugLoc  DbgLoc  )

static

Definition at line 1345 of file SelectionDAGISel.cpp.

References llvm::DIExpression::append(), llvm::dbgs(), llvm::DIExpression::isEntryValue(), llvm::MachineRegisterInfo::liveins(), LLVM_DEBUG, llvm::FunctionLoweringInfo::MF, llvm::FunctionLoweringInfo::RegInfo, llvm::MachineFunction::setVariableDbgInfo(), and llvm::FunctionLoweringInfo::ValueMap.

Referenced by processDbgDeclare().

processSingleLocVars()

static void processSingleLocVars ( FunctionLoweringInfo &  FuncInfo, FunctionVarLocs const *  FnVarLocs  )

static

Collect single location variable information generated with assignment tracking.

This is done after argument lowering in case the declarations refer to arguments.

Definition at line 1433 of file SelectionDAGISel.cpp.

References assert(), End, llvm::FunctionVarLocs::getDILocalVariable(), processDbgDeclare(), llvm::FunctionVarLocs::single_locs_begin(), and llvm::FunctionVarLocs::single_locs_end().

reportFastISelFailure()

static void reportFastISelFailure ( MachineFunction &  MF, OptimizationRemarkEmitter &  ORE, OptimizationRemarkMissed &  R, bool  ShouldAbort  )

static

Definition at line 665 of file SelectionDAGISel.cpp.

References llvm::dbgs(), llvm::OptimizationRemarkEmitter::emit(), llvm::MachineFunction::getName(), LLVM_DEBUG, and llvm::report_fatal_error().

STATISTIC() [1/7]

STATISTIC	(	NumDAGBlocks	,
		"Number of blocks selected using DAG"
	)

STATISTIC() [2/7]

STATISTIC	(	NumDAGIselRetries	,
		"Number of times dag isel has to try another path"
	)

STATISTIC() [3/7]

STATISTIC	(	NumEntryBlocks	,
		"Number of entry blocks encountered"
	)

STATISTIC() [4/7]

STATISTIC	(	NumFastIselBlocks	,
		"Number of blocks selected entirely by fast isel"
	)

STATISTIC() [5/7]

STATISTIC	(	NumFastIselFailLowerArguments	,
		"Number of entry blocks where fast isel failed to lower arguments"
	)

STATISTIC() [6/7]

STATISTIC	(	NumFastIselFailures	,
		"Number of instructions fast isel failed on"
	)

STATISTIC() [7/7]

STATISTIC	(	NumFastIselSuccess	,
		"Number of instructions fast isel selected"
	)

Variable Documentation

defaultListDAGScheduler

RegisterScheduler defaultListDAGScheduler("default", "Best scheduler for the target", createDefaultScheduler) ( "default"  , "Best scheduler for the target"  , createDefaultScheduler    )

static

EnableFastISelAbort

cl::opt< int > EnableFastISelAbort("fast-isel-abort", cl::Hidden, cl::desc("Enable abort calls when \"fast\" instruction selection " "fails to lower an instruction: 0 disable the abort, 1 will " "abort but for args, calls and terminators, 2 will also " "abort for argument lowering, and 3 will never fallback " "to SelectionDAG.")) ( "fast-isel-abort"  , cl::Hidden  , cl::desc("Enable abort calls when \"fast\" instruction selection " "fails to lower an instruction: 0 disable the abort, 1 will " "abort but for args, calls and terminators, 2 will also " "abort for argument lowering, and 3 will never fallback " "to SelectionDAG.")    )

static

Referenced by llvm::SelectionDAGISel::runOnMachineFunction().

EnableFastISelFallbackReport

cl::opt< bool > EnableFastISelFallbackReport("fast-isel-report-on-fallback", cl::Hidden, cl::desc("Emit a diagnostic when \"fast\" instruction selection " "falls back to SelectionDAG.")) ( "fast-isel-report-on-fallback"  , cl::Hidden  , cl::desc("Emit a diagnostic when \"fast\" instruction selection " "falls back to SelectionDAG.")    )

static

Referenced by llvm::SelectionDAGISel::runOnMachineFunction().

FilterDAGBasicBlockName

cl::opt< std::string > FilterDAGBasicBlockName("filter-view-dags", cl::Hidden, cl::desc("Only display the basic block whose name " "matches this for all view-*-dags options")) ( "filter-view-dags"  , cl::Hidden  , cl::desc("Only display the basic block whose name " "matches this for all view-*-dags options")    )

static

ISHeuristic

cl::opt< RegisterScheduler::FunctionPassCtor, false, RegisterPassParser< RegisterScheduler > > ISHeuristic("pre-RA-sched", cl::init(&createDefaultScheduler), cl::Hidden, cl::desc("Instruction schedulers available (before register" " allocation):")) ( "pre-RA-sched"  , cl::init &  createDefaultScheduler, cl::Hidden  , cl::desc("Instruction schedulers available (before register" " allocation):")    )

static

ISHeuristic command line option for instruction schedulers.

UseMBPI

cl::opt< bool > UseMBPI("use-mbpi", cl::desc("use Machine Branch Probability Info"), cl::init(true), cl::Hidden) ( "use-mbpi"  , cl::desc("use Machine Branch Probability Info")  , cl::init(true)  , cl::Hidden    )

static

Referenced by llvm::SelectionDAGISel::getAnalysisUsage(), and llvm::SelectionDAGISel::runOnMachineFunction().

ViewDAGCombine1

cl::opt< bool > ViewDAGCombine1("view-dag-combine1-dags", cl::Hidden, cl::desc("Pop up a window to show dags before the first " "dag combine pass")) ( "view-dag-combine1-dags"  , cl::Hidden  , cl::desc("Pop up a window to show dags before the first " "dag combine pass")    )

static

ViewDAGCombine2

cl::opt< bool > ViewDAGCombine2("view-dag-combine2-dags", cl::Hidden, cl::desc("Pop up a window to show dags before the second " "dag combine pass")) ( "view-dag-combine2-dags"  , cl::Hidden  , cl::desc("Pop up a window to show dags before the second " "dag combine pass")    )

static

ViewDAGCombineLT

cl::opt< bool > ViewDAGCombineLT("view-dag-combine-lt-dags", cl::Hidden, cl::desc("Pop up a window to show dags before the post " "legalize types dag combine pass")) ( "view-dag-combine-lt-dags"  , cl::Hidden  , cl::desc("Pop up a window to show dags before the post " "legalize types dag combine pass")    )

static

ViewISelDAGs

cl::opt< bool > ViewISelDAGs("view-isel-dags", cl::Hidden, cl::desc("Pop up a window to show isel dags as they are selected")) ( "view-isel-dags"  , cl::Hidden  , cl::desc("Pop up a window to show isel dags as they are selected")    )

static

ViewLegalizeDAGs

cl::opt< bool > ViewLegalizeDAGs("view-legalize-dags", cl::Hidden, cl::desc("Pop up a window to show dags before legalize")) ( "view-legalize-dags"  , cl::Hidden  , cl::desc("Pop up a window to show dags before legalize")    )

static

ViewLegalizeTypesDAGs

cl::opt< bool > ViewLegalizeTypesDAGs("view-legalize-types-dags", cl::Hidden, cl::desc("Pop up a window to show dags before legalize types")) ( "view-legalize-types-dags"  , cl::Hidden  , cl::desc("Pop up a window to show dags before legalize types")    )

static

ViewSchedDAGs

cl::opt< bool > ViewSchedDAGs("view-sched-dags", cl::Hidden, cl::desc("Pop up a window to show sched dags as they are processed")) ( "view-sched-dags"  , cl::Hidden  , cl::desc("Pop up a window to show sched dags as they are processed")    )

static

ViewSUnitDAGs

cl::opt< bool > ViewSUnitDAGs("view-sunit-dags", cl::Hidden, cl::desc("Pop up a window to show SUnit dags after they are processed")) ( "view-sunit-dags"  , cl::Hidden  , cl::desc("Pop up a window to show SUnit dags after they are processed")    )

static