SelectionDAGISel.cpp File Reference (original) (raw)

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

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")
static bool	dontUseFastISelFor (const Function &Fn)
static bool	maintainPGOProfile (const TargetMachine &TM, CodeGenOptLevel OptLevel)
LLVM_ABI ScheduleDAGSDNodes *	llvm::createDefaultScheduler (SelectionDAGISel *IS, CodeGenOptLevel OptLevel)
	createDefaultScheduler - This creates an instruction scheduler appropriate for the target.
static void	reportFastISelFailure (MachineFunction &MF, OptimizationRemarkEmitter &ORE, OptimizationRemarkMissed &R, bool ShouldAbort)
static void	preserveFakeUses (BasicBlock::iterator Begin, BasicBlock::iterator End)
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 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 LLVM_ATTRIBUTE_ALWAYS_INLINE MVT::SimpleValueType	getSimpleVT (const unsigned char *MatcherTable, unsigned &MatcherIndex)
	getSimpleVT - Decode a value in MatcherTable, if it's a VBR encoded value, use GetVBR to decode it.
static SDValue	HandleMergeInputChains (const SmallVectorImpl< SDNode * > &ChainNodesMatched, SDValue InputGlue, 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 (unsigned Opcode, const unsigned char *MatcherTable, unsigned &MatcherIndex, const SelectionDAGISel &SDISel)
	CheckPatternPredicate - Implements OP_CheckPatternPredicate.
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckNodePredicate (unsigned Opcode, const unsigned char *MatcherTable, unsigned &MatcherIndex, const SelectionDAGISel &SDISel, SDValue Op)
	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 (MVT::SimpleValueType VT, SDValue N, const TargetLowering *TLI, const DataLayout &DL)
static LLVM_ATTRIBUTE_ALWAYS_INLINE bool	CheckChildType (MVT::SimpleValueType VT, 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< bool >	DumpSortedDAG ("dump-sorted-dags", cl::Hidden, cl::desc("Print DAGs with sorted nodes in debug dump"), cl::init(false))
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)

◆ DEBUG_TYPE

#define DEBUG_TYPE "isel"

◆ ISEL_DUMP

Value:

do { \

} \

} while (false)

#define ISEL_DUMP_DEBUG_TYPE

static TableGen::Emitter::OptClass< SkeletonEmitter > X("gen-skeleton-class", "Generate example skeleton class")

LLVM_ABI bool isCurrentDebugType(const char *Type, int Level=0)

isCurrentDebugType - Return true if the specified string is the debug type specified on the command l...

LLVM_ABI bool DebugFlag

This boolean is set to true if the '-debug' command line option is specified.

Definition at line 191 of file SelectionDAGISel.cpp.

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

◆ ISEL_DUMP_DEBUG_TYPE

◆ CheckAndImm()

◆ CheckChild2CondCode()

◆ CheckChildInteger()

◆ CheckChildSame()

◆ CheckChildType()

◆ CheckCondCode()

◆ CheckInteger()

◆ CheckNodePredicate()

◆ CheckOpcode()

◆ CheckOrImm()

◆ CheckPatternPredicate()

◆ CheckSame()

◆ CheckType()

◆ CheckValueType()

◆ decodeSignRotatedValue()

◆ dontUseFastISelFor()

◆ findNonImmUse()

◆ getSimpleVT()

◆ GetVBR()

◆ HandleMergeInputChains()

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 2781 of file SelectionDAGISel.cpp.

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

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

◆ hasExceptionPointerOrCodeUser()

◆ isFoldedOrDeadInstruction()

◆ IsPredicateKnownToFail()

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 3072 of file SelectionDAGISel.cpp.

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

◆ maintainPGOProfile()

◆ mapWasmLandingPadIndex()

◆ preserveFakeUses()

◆ processDbgDeclare()

Definition at line 1555 of file SelectionDAGISel.cpp.

References llvm::DIExpression::ApplyOffset, assert(), llvm::dbgs(), DL, llvm::dyn_cast(), 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()

◆ processIfEntryValueDbgDeclare()

◆ processSingleLocVars()

◆ reportFastISelFailure()

◆ 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]

◆ defaultListDAGScheduler

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

◆ DumpSortedDAG

cl::opt< bool > DumpSortedDAG("dump-sorted-dags", cl::Hidden, cl::desc("Print DAGs with sorted nodes in debug dump"), cl::init(false)) ( "dump-sorted-dags" , cl::Hidden , cl::desc("Print DAGs with sorted nodes in debug dump") , cl::init(false) )	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

◆ 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

◆ 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

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

◆ 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