class MachineFunction;
class MachineFrameInfo;
class MachineInstr;
+ class MachineJumpTableInfo;
class MachineModuleInfo;
+ class MCContext;
+ class MCExpr;
class DwarfWriter;
class SDNode;
class SDValue;
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; }
/// 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,
+ virtual bool getTgtMemIntrinsic(IntrinsicInfo &Info,
CallInst &I, unsigned Intrinsic) {
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
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
+ /// It returns EVT::Other 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;
+ virtual EVT getOptimalMemOpType(uint64_t Size,
+ unsigned DstAlign, unsigned SrcAlign,
+ bool SafeToUseFP, SelectionDAG &DAG) const {
+ return MVT::Other;
}
/// usesUnderscoreSetJmp - Determine if we should use _setjmp or setjmp
/// MachineJumpTableInfo::JTEntryKind enum.
virtual unsigned getJumpTableEncoding() const;
+ virtual const MCExpr *
+ LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
+ 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
/// jumptable.
virtual SDValue getPICJumpTableRelocBase(SDValue Table,
- SelectionDAG &DAG) const;
-
+ SelectionDAG &DAG) const;
+
+ /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
+ /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
+ /// MCExpr.
+ virtual const MCExpr *
+ getPICJumpTableRelocBaseExpr(const MachineFunction *MF,
+ unsigned JTI, MCContext &Ctx) const;
+
/// isOffsetFoldingLegal - Return true if folding a constant offset
/// with the given GlobalAddress is legal. It is frequently not legal in
/// PIC relocation models.
//
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; }
}
/// 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 &&
}
/// 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) &&
}
/// 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,
}
/// 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,
IndexedModeActions[(unsigned)VT.SimpleTy][1][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,
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);
/// 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,
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;
///
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;
/// represents the various modes for load store.
uint8_t IndexedModeActions[MVT::LAST_VALUETYPE][2][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.
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