class MachineFrameInfo;
class MachineInstr;
class MachineJumpTableInfo;
- class MachineModuleInfo;
class MCContext;
class MCExpr;
- class DwarfWriter;
class SDNode;
class SDValue;
class SelectionDAG;
class TargetData;
class TargetMachine;
class TargetRegisterClass;
- class TargetSubtarget;
class TargetLoweringObjectFile;
class Value;
ZeroOrNegativeOneBooleanContent // All bits equal to bit 0.
};
- enum SchedPreference {
- SchedulingForLatency, // Scheduling for shortest total latency.
- SchedulingForRegPressure // Scheduling for lowest register pressure.
- };
-
/// NOTE: The constructor takes ownership of TLOF.
- explicit TargetLowering(TargetMachine &TM, TargetLoweringObjectFile *TLOF);
+ explicit TargetLowering(const TargetMachine &TM,
+ const TargetLoweringObjectFile *TLOF);
virtual ~TargetLowering();
- TargetMachine &getTargetMachine() const { return TM; }
+ const TargetMachine &getTargetMachine() const { return TM; }
const TargetData *getTargetData() const { return TD; }
- TargetLoweringObjectFile &getObjFileLowering() const { return TLOF; }
+ const TargetLoweringObjectFile &getObjFileLowering() const { return TLOF; }
bool isBigEndian() const { return !IsLittleEndian; }
bool isLittleEndian() const { return IsLittleEndian; }
MVT getPointerTy() const { return PointerTy; }
MVT getShiftAmountTy() const { return ShiftAmountTy; }
- /// usesGlobalOffsetTable - Return true if this target uses a GOT for PIC
- /// codegen.
- bool usesGlobalOffsetTable() const { return UsesGlobalOffsetTable; }
-
/// isSelectExpensive - Return true if the select operation is expensive for
/// this target.
bool isSelectExpensive() const { return SelectIsExpensive; }
BooleanContent getBooleanContents() const { return BooleanContents;}
/// getSchedulingPreference - Return target scheduling preference.
- SchedPreference getSchedulingPreference() const {
+ Sched::Preference getSchedulingPreference() const {
return SchedPreferenceInfo;
}
+ /// getSchedulingPreference - Some scheduler, e.g. hybrid, can switch to
+ /// different scheduling heuristics for different nodes. This function returns
+ /// the preference (or none) for the given node.
+ virtual Sched::Preference getSchedulingPreference(SDNode *N) const {
+ return Sched::None;
+ }
+
/// getRegClassFor - Return the register class that should be used for the
- /// specified value type. This may only be called on legal types.
- TargetRegisterClass *getRegClassFor(EVT VT) const {
+ /// specified value type.
+ virtual TargetRegisterClass *getRegClassFor(EVT VT) const {
assert(VT.isSimple() && "getRegClassFor called on illegal type!");
TargetRegisterClass *RC = RegClassForVT[VT.getSimpleVT().SimpleTy];
assert(RC && "This value type is not natively supported!");
return VT.isSimple() && RegClassForVT[VT.getSimpleVT().SimpleTy] != 0;
}
+ /// isTypeSynthesizable - Return true if it's OK for the compiler to create
+ /// new operations of this type. All Legal types are synthesizable except
+ /// MMX vector types on X86. Non-Legal types are not synthesizable.
+ bool isTypeSynthesizable(EVT VT) const {
+ return isTypeLegal(VT) && Synthesizable[VT.getSimpleVT().SimpleTy];
+ }
+
class ValueTypeActionImpl {
- /// ValueTypeActions - This is a bitvector that contains two bits for each
- /// value type, where the two bits correspond to the LegalizeAction enum.
- /// This can be queried with "getTypeAction(VT)".
- /// dimension by (MVT::MAX_ALLOWED_VALUETYPE/32) * 2
- uint32_t ValueTypeActions[(MVT::MAX_ALLOWED_VALUETYPE/32)*2];
+ /// ValueTypeActions - For each value type, keep a LegalizeAction enum
+ /// that indicates how instruction selection should deal with the type.
+ uint8_t ValueTypeActions[MVT::LAST_VALUETYPE];
public:
ValueTypeActionImpl() {
- ValueTypeActions[0] = ValueTypeActions[1] = 0;
- ValueTypeActions[2] = ValueTypeActions[3] = 0;
- }
- ValueTypeActionImpl(const ValueTypeActionImpl &RHS) {
- ValueTypeActions[0] = RHS.ValueTypeActions[0];
- ValueTypeActions[1] = RHS.ValueTypeActions[1];
- ValueTypeActions[2] = RHS.ValueTypeActions[2];
- ValueTypeActions[3] = RHS.ValueTypeActions[3];
+ std::fill(ValueTypeActions, array_endof(ValueTypeActions), 0);
}
-
LegalizeAction getTypeAction(LLVMContext &Context, EVT VT) const {
if (VT.isExtended()) {
if (VT.isVector()) {
return Legal;
}
unsigned I = VT.getSimpleVT().SimpleTy;
- assert(I<4*array_lengthof(ValueTypeActions)*sizeof(ValueTypeActions[0]));
- return (LegalizeAction)((ValueTypeActions[I>>4] >> ((2*I) & 31)) & 3);
+ return (LegalizeAction)ValueTypeActions[I];
}
void setTypeAction(EVT VT, LegalizeAction Action) {
unsigned I = VT.getSimpleVT().SimpleTy;
- assert(I<4*array_lengthof(ValueTypeActions)*sizeof(ValueTypeActions[0]));
- ValueTypeActions[I>>4] |= Action << ((I*2) & 31);
+ ValueTypeActions[I] = Action;
}
};
/// intrinsic will need to map to a MemIntrinsicNode (touches memory). If
/// this is the case, it returns true and store the intrinsic
/// information into the IntrinsicInfo that was passed to the function.
- typedef struct IntrinsicInfo {
+ struct IntrinsicInfo {
unsigned opc; // target opcode
EVT memVT; // memory VT
const Value* ptrVal; // value representing memory location
bool vol; // is volatile?
bool readMem; // reads memory?
bool writeMem; // writes memory?
- } IntrinisicInfo;
+ };
- virtual bool getTgtMemIntrinsic(IntrinsicInfo& Info,
- CallInst &I, unsigned Intrinsic) {
+ virtual bool getTgtMemIntrinsic(IntrinsicInfo &Info,
+ const CallInst &I, unsigned Intrinsic) const {
return false;
}
- /// getWidenVectorType: given a vector type, returns the type to widen to
- /// (e.g., v7i8 to v8i8). If the vector type is legal, it returns itself.
- /// If there is no vector type that we want to widen to, returns MVT::Other
- /// When and were to widen is target dependent based on the cost of
- /// scalarizing vs using the wider vector type.
- virtual EVT getWidenVectorType(EVT VT) const;
-
/// isFPImmLegal - Returns true if the target can instruction select the
/// specified FP immediate natively. If false, the legalizer will materialize
/// the FP immediate as a load from a constant pool.
return true;
}
+ /// canOpTrap - Returns true if the operation can trap for the value type.
+ /// VT must be a legal type. By default, we optimistically assume most
+ /// operations don't trap except for divide and remainder.
+ virtual bool canOpTrap(unsigned Op, EVT VT) const;
+
/// isVectorClearMaskLegal - Similar to isShuffleMaskLegal. This is
/// used by Targets can use this to indicate if there is a suitable
/// VECTOR_SHUFFLE that can be used to replace a VAND with a constant
/// for it.
LegalizeAction getOperationAction(unsigned Op, EVT VT) const {
if (VT.isExtended()) return Expand;
- assert(Op < array_lengthof(OpActions[0]) &&
- (unsigned)VT.getSimpleVT().SimpleTy < sizeof(OpActions[0][0])*8 &&
- "Table isn't big enough!");
+ assert(Op < array_lengthof(OpActions[0]) && "Table isn't big enough!");
unsigned I = (unsigned) VT.getSimpleVT().SimpleTy;
- unsigned J = I & 31;
- I = I >> 5;
- return (LegalizeAction)((OpActions[I][Op] >> (J*2) ) & 3);
+ return (LegalizeAction)OpActions[I][Op];
}
/// isOperationLegalOrCustom - Return true if the specified operation is
/// either it is legal, needs to be promoted to a larger size, needs to be
/// expanded to some other code sequence, or the target has a custom expander
/// for it.
- LegalizeAction getLoadExtAction(unsigned LType, EVT VT) const {
- assert(LType < array_lengthof(LoadExtActions) &&
- (unsigned)VT.getSimpleVT().SimpleTy < sizeof(LoadExtActions[0])*4 &&
+ LegalizeAction getLoadExtAction(unsigned ExtType, EVT VT) const {
+ assert(ExtType < ISD::LAST_LOADEXT_TYPE &&
+ (unsigned)VT.getSimpleVT().SimpleTy < MVT::LAST_VALUETYPE &&
"Table isn't big enough!");
- return (LegalizeAction)((LoadExtActions[LType] >>
- (2*VT.getSimpleVT().SimpleTy)) & 3);
+ return (LegalizeAction)LoadExtActions[VT.getSimpleVT().SimpleTy][ExtType];
}
/// isLoadExtLegal - Return true if the specified load with extension is legal
/// on this target.
- bool isLoadExtLegal(unsigned LType, EVT VT) const {
+ bool isLoadExtLegal(unsigned ExtType, EVT VT) const {
return VT.isSimple() &&
- (getLoadExtAction(LType, VT) == Legal ||
- getLoadExtAction(LType, VT) == Custom);
+ (getLoadExtAction(ExtType, VT) == Legal ||
+ getLoadExtAction(ExtType, VT) == Custom);
}
/// getTruncStoreAction - Return how this store with truncation should be
/// treated: either it is legal, needs to be promoted to a larger size, needs
/// to be expanded to some other code sequence, or the target has a custom
/// expander for it.
- LegalizeAction getTruncStoreAction(EVT ValVT,
- EVT MemVT) const {
- assert((unsigned)ValVT.getSimpleVT().SimpleTy <
- array_lengthof(TruncStoreActions) &&
- (unsigned)MemVT.getSimpleVT().SimpleTy <
- sizeof(TruncStoreActions[0])*4 &&
+ LegalizeAction getTruncStoreAction(EVT ValVT, EVT MemVT) const {
+ assert((unsigned)ValVT.getSimpleVT().SimpleTy < MVT::LAST_VALUETYPE &&
+ (unsigned)MemVT.getSimpleVT().SimpleTy < MVT::LAST_VALUETYPE &&
"Table isn't big enough!");
- return (LegalizeAction)((TruncStoreActions[ValVT.getSimpleVT().SimpleTy] >>
- (2*MemVT.getSimpleVT().SimpleTy)) & 3);
+ return (LegalizeAction)TruncStoreActions[ValVT.getSimpleVT().SimpleTy]
+ [MemVT.getSimpleVT().SimpleTy];
}
/// isTruncStoreLegal - Return true if the specified store with truncation is
/// for it.
LegalizeAction
getIndexedLoadAction(unsigned IdxMode, EVT VT) const {
- assert( IdxMode < array_lengthof(IndexedModeActions[0][0]) &&
+ assert( IdxMode < ISD::LAST_INDEXED_MODE &&
((unsigned)VT.getSimpleVT().SimpleTy) < MVT::LAST_VALUETYPE &&
"Table isn't big enough!");
- return (LegalizeAction)((IndexedModeActions[
- (unsigned)VT.getSimpleVT().SimpleTy][0][IdxMode]));
+ unsigned Ty = (unsigned)VT.getSimpleVT().SimpleTy;
+ return (LegalizeAction)((IndexedModeActions[Ty][IdxMode] & 0xf0) >> 4);
}
/// isIndexedLoadLegal - Return true if the specified indexed load is legal
/// for it.
LegalizeAction
getIndexedStoreAction(unsigned IdxMode, EVT VT) const {
- assert(IdxMode < array_lengthof(IndexedModeActions[0][1]) &&
- (unsigned)VT.getSimpleVT().SimpleTy < MVT::LAST_VALUETYPE &&
+ assert( IdxMode < ISD::LAST_INDEXED_MODE &&
+ ((unsigned)VT.getSimpleVT().SimpleTy) < MVT::LAST_VALUETYPE &&
"Table isn't big enough!");
- return (LegalizeAction)((IndexedModeActions[
- (unsigned)VT.getSimpleVT().SimpleTy][1][IdxMode]));
+ unsigned Ty = (unsigned)VT.getSimpleVT().SimpleTy;
+ return (LegalizeAction)(IndexedModeActions[Ty][IdxMode] & 0x0f);
}
/// isIndexedStoreLegal - Return true if the specified indexed load is legal
getIndexedStoreAction(IdxMode, VT) == Custom);
}
- /// getConvertAction - Return how the conversion should be treated:
- /// either it is legal, needs to be promoted to a larger size, needs to be
- /// expanded to some other code sequence, or the target has a custom expander
- /// for it.
- LegalizeAction
- getConvertAction(EVT FromVT, EVT ToVT) const {
- assert((unsigned)FromVT.getSimpleVT().SimpleTy <
- array_lengthof(ConvertActions) &&
- (unsigned)ToVT.getSimpleVT().SimpleTy <
- sizeof(ConvertActions[0])*4 &&
- "Table isn't big enough!");
- return (LegalizeAction)((ConvertActions[FromVT.getSimpleVT().SimpleTy] >>
- (2*ToVT.getSimpleVT().SimpleTy)) & 3);
- }
-
- /// isConvertLegal - Return true if the specified conversion is legal
- /// on this target.
- bool isConvertLegal(EVT FromVT, EVT ToVT) const {
- return isTypeLegal(FromVT) && isTypeLegal(ToVT) &&
- (getConvertAction(FromVT, ToVT) == Legal ||
- getConvertAction(FromVT, ToVT) == Custom);
- }
-
/// getCondCodeAction - Return how the condition code should be treated:
/// either it is legal, needs to be expanded to some other code sequence,
/// or the target has a custom expander for it.
/// counterpart (e.g. structs), otherwise it will assert.
EVT getValueType(const Type *Ty, bool AllowUnknown = false) const {
EVT VT = EVT::getEVT(Ty, AllowUnknown);
- return VT == MVT:: iPTR ? PointerTy : VT;
+ return VT == MVT::iPTR ? PointerTy : VT;
}
/// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
}
/// getOptimalMemOpType - Returns the target specific optimal type for load
- /// and store operations as a result of memset, memcpy, and memmove lowering.
- /// It returns EVT::iAny if SelectionDAG should be responsible for
- /// determining it.
- virtual EVT getOptimalMemOpType(uint64_t Size, unsigned Align,
- bool isSrcConst, bool isSrcStr,
- SelectionDAG &DAG) const {
- return MVT::iAny;
+ /// and store operations as a result of memset, memcpy, and memmove
+ /// lowering. If DstAlign is zero that means it's safe to destination
+ /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
+ /// means there isn't a need to check it against alignment requirement,
+ /// probably because the source does not need to be loaded. If
+ /// 'NonScalarIntSafe' is true, that means it's safe to return a
+ /// non-scalar-integer type, e.g. empty string source, constant, or loaded
+ /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
+ /// constant so it does not need to be loaded.
+ /// It returns EVT::Other if the type should be determined using generic
+ /// target-independent logic.
+ virtual EVT getOptimalMemOpType(uint64_t Size,
+ unsigned DstAlign, unsigned SrcAlign,
+ bool NonScalarIntSafe, bool MemcpyStrSrc,
+ MachineFunction &MF) const {
+ return MVT::Other;
}
/// usesUnderscoreSetJmp - Determine if we should use _setjmp or setjmp
const MachineBasicBlock *MBB, unsigned uid,
MCContext &Ctx) const {
assert(0 && "Need to implement this hook if target has custom JTIs");
+ return 0;
}
/// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
/// that want to combine
struct TargetLoweringOpt {
SelectionDAG &DAG;
+ bool LegalTys;
+ bool LegalOps;
bool ShrinkOps;
SDValue Old;
SDValue New;
- explicit TargetLoweringOpt(SelectionDAG &InDAG, bool Shrink = false) :
- DAG(InDAG), ShrinkOps(Shrink) {}
+ explicit TargetLoweringOpt(SelectionDAG &InDAG,
+ bool LT, bool LO,
+ bool Shrink = false) :
+ DAG(InDAG), LegalTys(LT), LegalOps(LO), ShrinkOps(Shrink) {}
+
+ bool LegalTypes() const { return LegalTys; }
+ bool LegalOperations() const { return LegalOps; }
bool CombineTo(SDValue O, SDValue N) {
Old = O;
/// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
/// node is a GlobalAddress + offset.
virtual bool
- isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) const;
+ isGAPlusOffset(SDNode *N, const GlobalValue* &GA, int64_t &Offset) const;
/// PerformDAGCombine - This method will be invoked for all target nodes and
/// for any target-independent nodes that the target has registered with
/// more complex transformations.
///
virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
+
+ /// isTypeDesirableForOp - Return true if the target has native support for
+ /// the specified value type and it is 'desirable' to use the type for the
+ /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
+ /// instruction encodings are longer and some i16 instructions are slow.
+ virtual bool isTypeDesirableForOp(unsigned Opc, EVT VT) const {
+ // By default, assume all legal types are desirable.
+ return isTypeLegal(VT);
+ }
+
+ /// IsDesirableToPromoteOp - This method query the target whether it is
+ /// beneficial for dag combiner to promote the specified node. If true, it
+ /// should return the desired promotion type by reference.
+ virtual bool IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
+ return false;
+ }
//===--------------------------------------------------------------------===//
// TargetLowering Configuration Methods - These methods should be invoked by
//
protected:
- /// setUsesGlobalOffsetTable - Specify that this target does or doesn't use a
- /// GOT for PC-relative code.
- void setUsesGlobalOffsetTable(bool V) { UsesGlobalOffsetTable = V; }
-
/// setShiftAmountType - Describe the type that should be used for shift
/// amounts. This type defaults to the pointer type.
void setShiftAmountType(MVT VT) { ShiftAmountTy = VT; }
void setBooleanContents(BooleanContent Ty) { BooleanContents = Ty; }
/// setSchedulingPreference - Specify the target scheduling preference.
- void setSchedulingPreference(SchedPreference Pref) {
+ void setSchedulingPreference(Sched::Preference Pref) {
SchedPreferenceInfo = Pref;
}
/// addRegisterClass - Add the specified register class as an available
/// regclass for the specified value type. This indicates the selector can
/// handle values of that class natively.
- void addRegisterClass(EVT VT, TargetRegisterClass *RC) {
+ void addRegisterClass(EVT VT, TargetRegisterClass *RC,
+ bool isSynthesizable = true) {
assert((unsigned)VT.getSimpleVT().SimpleTy < array_lengthof(RegClassForVT));
AvailableRegClasses.push_back(std::make_pair(VT, RC));
RegClassForVT[VT.getSimpleVT().SimpleTy] = RC;
+ Synthesizable[VT.getSimpleVT().SimpleTy] = isSynthesizable;
}
/// computeRegisterProperties - Once all of the register classes are added,
/// with the specified type and indicate what to do about it.
void setOperationAction(unsigned Op, MVT VT,
LegalizeAction Action) {
- unsigned I = (unsigned)VT.SimpleTy;
- unsigned J = I & 31;
- I = I >> 5;
- OpActions[I][Op] &= ~(uint64_t(3UL) << (J*2));
- OpActions[I][Op] |= (uint64_t)Action << (J*2);
+ assert(Op < array_lengthof(OpActions[0]) && "Table isn't big enough!");
+ OpActions[(unsigned)VT.SimpleTy][Op] = (uint8_t)Action;
}
/// setLoadExtAction - Indicate that the specified load with extension does
- /// not work with the with specified type and indicate what to do about it.
+ /// not work with the specified type and indicate what to do about it.
void setLoadExtAction(unsigned ExtType, MVT VT,
- LegalizeAction Action) {
- assert((unsigned)VT.SimpleTy*2 < 63 &&
- ExtType < array_lengthof(LoadExtActions) &&
+ LegalizeAction Action) {
+ assert(ExtType < ISD::LAST_LOADEXT_TYPE &&
+ (unsigned)VT.SimpleTy < MVT::LAST_VALUETYPE &&
"Table isn't big enough!");
- LoadExtActions[ExtType] &= ~(uint64_t(3UL) << VT.SimpleTy*2);
- LoadExtActions[ExtType] |= (uint64_t)Action << VT.SimpleTy*2;
+ LoadExtActions[VT.SimpleTy][ExtType] = (uint8_t)Action;
}
/// setTruncStoreAction - Indicate that the specified truncating store does
- /// not work with the with specified type and indicate what to do about it.
+ /// not work with the specified type and indicate what to do about it.
void setTruncStoreAction(MVT ValVT, MVT MemVT,
LegalizeAction Action) {
- assert((unsigned)ValVT.SimpleTy < array_lengthof(TruncStoreActions) &&
- (unsigned)MemVT.SimpleTy*2 < 63 &&
+ assert((unsigned)ValVT.SimpleTy < MVT::LAST_VALUETYPE &&
+ (unsigned)MemVT.SimpleTy < MVT::LAST_VALUETYPE &&
"Table isn't big enough!");
- TruncStoreActions[ValVT.SimpleTy] &= ~(uint64_t(3UL) << MemVT.SimpleTy*2);
- TruncStoreActions[ValVT.SimpleTy] |= (uint64_t)Action << MemVT.SimpleTy*2;
+ TruncStoreActions[ValVT.SimpleTy][MemVT.SimpleTy] = (uint8_t)Action;
}
/// setIndexedLoadAction - Indicate that the specified indexed load does or
- /// does not work with the with specified type and indicate what to do abort
+ /// does not work with the specified type and indicate what to do abort
/// it. NOTE: All indexed mode loads are initialized to Expand in
/// TargetLowering.cpp
void setIndexedLoadAction(unsigned IdxMode, MVT VT,
LegalizeAction Action) {
assert((unsigned)VT.SimpleTy < MVT::LAST_VALUETYPE &&
- IdxMode < array_lengthof(IndexedModeActions[0][0]) &&
+ IdxMode < ISD::LAST_INDEXED_MODE &&
+ (unsigned)Action < 0xf &&
"Table isn't big enough!");
- IndexedModeActions[(unsigned)VT.SimpleTy][0][IdxMode] = (uint8_t)Action;
+ // Load action are kept in the upper half.
+ IndexedModeActions[(unsigned)VT.SimpleTy][IdxMode] &= ~0xf0;
+ IndexedModeActions[(unsigned)VT.SimpleTy][IdxMode] |= ((uint8_t)Action) <<4;
}
/// setIndexedStoreAction - Indicate that the specified indexed store does or
- /// does not work with the with specified type and indicate what to do about
+ /// does not work with the specified type and indicate what to do about
/// it. NOTE: All indexed mode stores are initialized to Expand in
/// TargetLowering.cpp
void setIndexedStoreAction(unsigned IdxMode, MVT VT,
LegalizeAction Action) {
assert((unsigned)VT.SimpleTy < MVT::LAST_VALUETYPE &&
- IdxMode < array_lengthof(IndexedModeActions[0][1] ) &&
+ IdxMode < ISD::LAST_INDEXED_MODE &&
+ (unsigned)Action < 0xf &&
"Table isn't big enough!");
- IndexedModeActions[(unsigned)VT.SimpleTy][1][IdxMode] = (uint8_t)Action;
+ // Store action are kept in the lower half.
+ IndexedModeActions[(unsigned)VT.SimpleTy][IdxMode] &= ~0x0f;
+ IndexedModeActions[(unsigned)VT.SimpleTy][IdxMode] |= ((uint8_t)Action);
}
- /// setConvertAction - Indicate that the specified conversion does or does
- /// not work with the with specified type and indicate what to do about it.
- void setConvertAction(MVT FromVT, MVT ToVT,
- LegalizeAction Action) {
- assert((unsigned)FromVT.SimpleTy < array_lengthof(ConvertActions) &&
- (unsigned)ToVT.SimpleTy < MVT::LAST_VALUETYPE &&
- "Table isn't big enough!");
- ConvertActions[FromVT.SimpleTy] &= ~(uint64_t(3UL) << ToVT.SimpleTy*2);
- ConvertActions[FromVT.SimpleTy] |= (uint64_t)Action << ToVT.SimpleTy*2;
- }
-
/// setCondCodeAction - Indicate that the specified condition code is or isn't
/// supported on the target and indicate what to do about it.
void setCondCodeAction(ISD::CondCode CC, MVT VT,
}
public:
-
- virtual const TargetSubtarget *getSubtarget() {
- assert(0 && "Not Implemented");
- return NULL; // this is here to silence compiler errors
- }
-
//===--------------------------------------------------------------------===//
// Lowering methods - These methods must be implemented by targets so that
// the SelectionDAGLowering code knows how to lower these.
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
DebugLoc dl, SelectionDAG &DAG,
- SmallVectorImpl<SDValue> &InVals) {
+ SmallVectorImpl<SDValue> &InVals) const {
assert(0 && "Not Implemented");
return SDValue(); // this is here to silence compiler errors
}
bool isVarArg, bool isInreg, unsigned NumFixedArgs,
CallingConv::ID CallConv, bool isTailCall,
bool isReturnValueUsed, SDValue Callee, ArgListTy &Args,
- SelectionDAG &DAG, DebugLoc dl, unsigned Order);
+ SelectionDAG &DAG, DebugLoc dl) const;
/// LowerCall - This hook must be implemented to lower calls into the
/// the specified DAG. The outgoing arguments to the call are described
/// described by the Ins array. The implementation should fill in the
/// InVals array with legal-type return values from the call, and return
/// the resulting token chain value.
- ///
- /// The isTailCall flag here is normative. If it is true, the
- /// implementation must emit a tail call. The
- /// IsEligibleForTailCallOptimization hook should be used to catch
- /// cases that cannot be handled.
- ///
virtual SDValue
LowerCall(SDValue Chain, SDValue Callee,
- CallingConv::ID CallConv, bool isVarArg, bool isTailCall,
+ CallingConv::ID CallConv, bool isVarArg, bool &isTailCall,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<ISD::InputArg> &Ins,
DebugLoc dl, SelectionDAG &DAG,
- SmallVectorImpl<SDValue> &InVals) {
+ SmallVectorImpl<SDValue> &InVals) const {
assert(0 && "Not Implemented");
return SDValue(); // this is here to silence compiler errors
}
virtual bool CanLowerReturn(CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<EVT> &OutTys,
const SmallVectorImpl<ISD::ArgFlagsTy> &ArgsFlags,
- SelectionDAG &DAG)
+ SelectionDAG &DAG) const
{
// Return true by default to get preexisting behavior.
return true;
}
+
/// LowerReturn - This hook must be implemented to lower outgoing
/// return values, described by the Outs array, into the specified
/// DAG. The implementation should return the resulting token chain
virtual SDValue
LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
- DebugLoc dl, SelectionDAG &DAG) {
+ DebugLoc dl, SelectionDAG &DAG) const {
assert(0 && "Not Implemented");
return SDValue(); // this is here to silence compiler errors
}
- /// EmitTargetCodeForMemcpy - Emit target-specific code that performs a
- /// memcpy. This can be used by targets to provide code sequences for cases
- /// that don't fit the target's parameters for simple loads/stores and can be
- /// more efficient than using a library call. This function can return a null
- /// SDValue if the target declines to use custom code and a different
- /// lowering strategy should be used.
- ///
- /// If AlwaysInline is true, the size is constant and the target should not
- /// emit any calls and is strongly encouraged to attempt to emit inline code
- /// even if it is beyond the usual threshold because this intrinsic is being
- /// expanded in a place where calls are not feasible (e.g. within the prologue
- /// for another call). If the target chooses to decline an AlwaysInline
- /// request here, legalize will resort to using simple loads and stores.
- virtual SDValue
- EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
- SDValue Chain,
- SDValue Op1, SDValue Op2,
- SDValue Op3, unsigned Align,
- bool AlwaysInline,
- const Value *DstSV, uint64_t DstOff,
- const Value *SrcSV, uint64_t SrcOff) {
- return SDValue();
- }
-
- /// EmitTargetCodeForMemmove - Emit target-specific code that performs a
- /// memmove. This can be used by targets to provide code sequences for cases
- /// that don't fit the target's parameters for simple loads/stores and can be
- /// more efficient than using a library call. This function can return a null
- /// SDValue if the target declines to use custom code and a different
- /// lowering strategy should be used.
- virtual SDValue
- EmitTargetCodeForMemmove(SelectionDAG &DAG, DebugLoc dl,
- SDValue Chain,
- SDValue Op1, SDValue Op2,
- SDValue Op3, unsigned Align,
- const Value *DstSV, uint64_t DstOff,
- const Value *SrcSV, uint64_t SrcOff) {
- return SDValue();
- }
-
- /// EmitTargetCodeForMemset - Emit target-specific code that performs a
- /// memset. This can be used by targets to provide code sequences for cases
- /// that don't fit the target's parameters for simple stores and can be more
- /// efficient than using a library call. This function can return a null
- /// SDValue if the target declines to use custom code and a different
- /// lowering strategy should be used.
- virtual SDValue
- EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
- SDValue Chain,
- SDValue Op1, SDValue Op2,
- SDValue Op3, unsigned Align,
- const Value *DstSV, uint64_t DstOff) {
- return SDValue();
- }
-
/// LowerOperationWrapper - This callback is invoked by the type legalizer
/// to legalize nodes with an illegal operand type but legal result types.
/// It replaces the LowerOperation callback in the type Legalizer.
/// The default implementation calls LowerOperation.
virtual void LowerOperationWrapper(SDNode *N,
SmallVectorImpl<SDValue> &Results,
- SelectionDAG &DAG);
+ SelectionDAG &DAG) const;
/// LowerOperation - This callback is invoked for operations that are
/// unsupported by the target, which are registered to use 'custom' lowering,
/// and whose defined values are all legal.
/// If the target has no operations that require custom lowering, it need not
/// implement this. The default implementation of this aborts.
- virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
+ virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
/// ReplaceNodeResults - This callback is invoked when a node result type is
/// illegal for the target, and the operation was registered to use 'custom'
/// If the target has no operations that require custom lowering, it need not
/// implement this. The default implementation aborts.
virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results,
- SelectionDAG &DAG) {
+ SelectionDAG &DAG) const {
assert(0 && "ReplaceNodeResults not implemented for this target!");
}
- /// IsEligibleForTailCallOptimization - Check whether the call is eligible for
- /// tail call optimization. Targets which want to do tail call optimization
- /// should override this function.
- virtual bool
- IsEligibleForTailCallOptimization(SDValue Callee,
- CallingConv::ID CalleeCC,
- bool isVarArg,
- const SmallVectorImpl<ISD::InputArg> &Ins,
- SelectionDAG& DAG) const {
- // Conservative default: no calls are eligible.
- return false;
- }
-
/// getTargetNodeName() - This method returns the name of a target specific
/// DAG node.
virtual const char *getTargetNodeName(unsigned Opcode) const;
/// or null if the target does not support "fast" ISel.
virtual FastISel *
createFastISel(MachineFunction &,
- MachineModuleInfo *, DwarfWriter *,
DenseMap<const Value *, unsigned> &,
DenseMap<const BasicBlock *, MachineBasicBlock *> &,
- DenseMap<const AllocaInst *, int> &
+ DenseMap<const AllocaInst *, int> &,
+ std::vector<std::pair<MachineInstr*, unsigned> > &
#ifndef NDEBUG
- , SmallSet<Instruction*, 8> &CatchInfoLost
+ , SmallSet<const Instruction *, 8> &CatchInfoLost
#endif
- ) {
+ ) const {
return 0;
}
// insert. The specified MachineInstr is created but not inserted into any
// basic blocks, and this method is called to expand it into a sequence of
// instructions, potentially also creating new basic blocks and control flow.
- // When new basic blocks are inserted and the edges from MBB to its successors
- // are modified, the method should insert pairs of <OldSucc, NewSucc> into the
- // DenseMap.
- virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
- MachineBasicBlock *MBB,
- DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
+ virtual MachineBasicBlock *
+ EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const;
//===--------------------------------------------------------------------===//
// Addressing mode description hooks (used by LSR etc).
}
private:
- TargetMachine &TM;
+ const TargetMachine &TM;
const TargetData *TD;
- TargetLoweringObjectFile &TLOF;
+ const TargetLoweringObjectFile &TLOF;
/// PointerTy - The type to use for pointers, usually i32 or i64.
///
///
bool IsLittleEndian;
- /// UsesGlobalOffsetTable - True if this target uses a GOT for PIC codegen.
- ///
- bool UsesGlobalOffsetTable;
-
/// SelectIsExpensive - Tells the code generator not to expand operations
/// into sequences that use the select operations if possible.
bool SelectIsExpensive;
/// SchedPreferenceInfo - The target scheduling preference: shortest possible
/// total cycles or lowest register usage.
- SchedPreference SchedPreferenceInfo;
+ Sched::Preference SchedPreferenceInfo;
/// JumpBufSize - The size, in bytes, of the target's jmp_buf buffers
unsigned JumpBufSize;
unsigned char NumRegistersForVT[MVT::LAST_VALUETYPE];
EVT RegisterTypeForVT[MVT::LAST_VALUETYPE];
+ /// Synthesizable indicates whether it is OK for the compiler to create new
+ /// operations using this type. All Legal types are Synthesizable except
+ /// MMX types on X86. Non-Legal types are not Synthesizable.
+ bool Synthesizable[MVT::LAST_VALUETYPE];
+
/// TransformToType - For any value types we are promoting or expanding, this
/// contains the value type that we are changing to. For Expanded types, this
/// contains one step of the expand (e.g. i64 -> i32), even if there are
/// Most operations are Legal (aka, supported natively by the target), but
/// operations that are not should be described. Note that operations on
/// non-legal value types are not described here.
- /// This array is accessed using VT.getSimpleVT(), so it is subject to
- /// the MVT::MAX_ALLOWED_VALUETYPE * 2 bits.
- uint64_t OpActions[MVT::MAX_ALLOWED_VALUETYPE/(sizeof(uint64_t)*4)][ISD::BUILTIN_OP_END];
+ uint8_t OpActions[MVT::LAST_VALUETYPE][ISD::BUILTIN_OP_END];
- /// LoadExtActions - For each load of load extension type and each value type,
+ /// LoadExtActions - For each load extension type and each value type,
/// keep a LegalizeAction that indicates how instruction selection should deal
- /// with the load.
- uint64_t LoadExtActions[ISD::LAST_LOADEXT_TYPE];
+ /// with a load of a specific value type and extension type.
+ uint8_t LoadExtActions[MVT::LAST_VALUETYPE][ISD::LAST_LOADEXT_TYPE];
- /// TruncStoreActions - For each truncating store, keep a LegalizeAction that
- /// indicates how instruction selection should deal with the store.
- uint64_t TruncStoreActions[MVT::LAST_VALUETYPE];
+ /// TruncStoreActions - For each value type pair keep a LegalizeAction that
+ /// indicates whether a truncating store of a specific value type and
+ /// truncating type is legal.
+ uint8_t TruncStoreActions[MVT::LAST_VALUETYPE][MVT::LAST_VALUETYPE];
/// IndexedModeActions - For each indexed mode and each value type,
/// keep a pair of LegalizeAction that indicates how instruction
- /// selection should deal with the load / store. The first
- /// dimension is now the value_type for the reference. The second
- /// dimension is the load [0] vs. store[1]. The third dimension
- /// represents the various modes for load store.
- uint8_t IndexedModeActions[MVT::LAST_VALUETYPE][2][ISD::LAST_INDEXED_MODE];
+ /// selection should deal with the load / store. The first dimension is the
+ /// value_type for the reference. The second dimension represents the various
+ /// modes for load store.
+ uint8_t IndexedModeActions[MVT::LAST_VALUETYPE][ISD::LAST_INDEXED_MODE];
- /// ConvertActions - For each conversion from source type to destination type,
- /// keep a LegalizeAction that indicates how instruction selection should
- /// deal with the conversion.
- /// Currently, this is used only for floating->floating conversions
- /// (FP_EXTEND and FP_ROUND).
- uint64_t ConvertActions[MVT::LAST_VALUETYPE];
-
/// CondCodeActions - For each condition code (ISD::CondCode) keep a
/// LegalizeAction that indicates how instruction selection should
/// deal with the condition code.
projects / oota-llvm.git / blobdiff