namespace llvm {
class AliasAnalysis;
-class TargetLowering;
-class MachineModuleInfo;
class DwarfWriter;
-class MachineFunction;
-class MachineConstantPoolValue;
class FunctionLoweringInfo;
+class MachineConstantPoolValue;
+class MachineFunction;
+class MachineModuleInfo;
+class SDNodeOrdering;
+class SDDbgValue;
+class TargetLowering;
template<> struct ilist_traits<SDNode> : public ilist_default_traits<SDNode> {
private:
static void createNode(const SDNode &);
};
+/// SDDbgInfo - Keeps track of dbg_value information through SDISel. We do
+/// not build SDNodes for these so as not to perturb the generated code;
+/// instead the info is kept off to the side in this structure. SDNodes may
+/// have an associated dbg_value entry in DbgValMap. Debug info that is not
+/// associated with any SDNode is held in DbgConstMap. It is possible for
+/// optimizations to change a variable to a constant, in which case the
+/// corresponding debug info is moved from the variable to the constant table
+/// (NYI).
+class SDDbgInfo {
+ DenseMap<const SDNode*, SDDbgValue*> DbgVblMap;
+ SmallVector<SDDbgValue*, 4> DbgConstMap;
+
+ void operator=(const SDDbgInfo&); // Do not implement.
+ SDDbgInfo(const SDDbgInfo&); // Do not implement.
+public:
+ SDDbgInfo() {}
+
+ void add(const SDNode *Node, SDDbgValue *V) {
+ DbgVblMap[Node] = V;
+ }
+ void add(SDDbgValue *V) { DbgConstMap.push_back(V); }
+ void remove(const SDNode *Node) {
+ DenseMap<const SDNode*, SDDbgValue*>::iterator Itr =
+ DbgVblMap.find(Node);
+ if (Itr != DbgVblMap.end())
+ DbgVblMap.erase(Itr);
+ }
+ // No need to remove a constant.
+ void clear() {
+ DbgVblMap.clear();
+ DbgConstMap.clear();
+ }
+ SDDbgValue *getSDDbgValue(const SDNode *Node) {
+ return DbgVblMap[Node];
+ }
+ typedef SmallVector<SDDbgValue*, 4>::iterator ConstDbgIterator;
+ ConstDbgIterator DbgConstBegin() { return DbgConstMap.begin(); }
+ ConstDbgIterator DbgConstEnd() { return DbgConstMap.end(); }
+};
+
enum CombineLevel {
Unrestricted, // Combine may create illegal operations and illegal types.
NoIllegalTypes, // Combine may create illegal operations but no illegal types.
NoIllegalOperations // Combine may only create legal operations and types.
};
+class SelectionDAG;
+void checkForCycles(const SDNode *N);
+void checkForCycles(const SelectionDAG *DAG);
+
/// SelectionDAG class - This is used to represent a portion of an LLVM function
/// in a low-level Data Dependence DAG representation suitable for instruction
/// selection. This DAG is constructed as the first step of instruction
/// SelectionDAG.
BumpPtrAllocator Allocator;
+ /// SDNodeOrdering - The ordering of the SDNodes. It roughly corresponds to
+ /// the ordering of the original LLVM instructions.
+ SDNodeOrdering *Ordering;
+
+ /// DbgInfo - Tracks dbg_value information through SDISel.
+ SDDbgInfo *DbgInfo;
+
/// VerifyNode - Sanity check the given node. Aborts if it is invalid.
void VerifyNode(SDNode *N);
DenseSet<SDNode *> &visited,
int level, bool &printed);
+ void operator=(const SelectionDAG&); // Do not implement.
+ SelectionDAG(const SelectionDAG&); // Do not implement.
+
public:
SelectionDAG(TargetLowering &tli, FunctionLoweringInfo &fli);
~SelectionDAG();
const SDValue &setRoot(SDValue N) {
assert((!N.getNode() || N.getValueType() == MVT::Other) &&
"DAG root value is not a chain!");
- return Root = N;
+ if (N.getNode())
+ checkForCycles(N.getNode());
+ Root = N;
+ if (N.getNode())
+ checkForCycles(this);
+ return Root;
}
/// Combine - This iterates over the nodes in the SelectionDAG, folding
///
/// Note that this is an involved process that may invalidate pointers into
/// the graph.
- void Legalize(bool TypesNeedLegalizing, CodeGenOpt::Level OptLevel);
+ void Legalize(CodeGenOpt::Level OptLevel);
/// LegalizeVectors - This transforms the SelectionDAG into a SelectionDAG
/// that only uses vector math operations supported by the target. This is
unsigned char TargetFlags = 0);
SDValue getValueType(EVT);
SDValue getRegister(unsigned Reg, EVT VT);
- SDValue getDbgStopPoint(DebugLoc DL, SDValue Root,
- unsigned Line, unsigned Col, MDNode *CU);
SDValue getLabel(unsigned Opcode, DebugLoc dl, SDValue Root,
unsigned LabelID);
SDValue getBlockAddress(BlockAddress *BA, EVT VT,
/// determined by their operands, and they produce a value AND a token chain.
///
SDValue getLoad(EVT VT, DebugLoc dl, SDValue Chain, SDValue Ptr,
- const Value *SV, int SVOffset, bool isVolatile=false,
- unsigned Alignment=0);
+ const Value *SV, int SVOffset, bool isVolatile,
+ bool isNonTemporal, unsigned Alignment);
SDValue getExtLoad(ISD::LoadExtType ExtType, DebugLoc dl, EVT VT,
- SDValue Chain, SDValue Ptr, const Value *SV,
- int SVOffset, EVT MemVT, bool isVolatile=false,
- unsigned Alignment=0);
+ SDValue Chain, SDValue Ptr, const Value *SV,
+ int SVOffset, EVT MemVT, bool isVolatile,
+ bool isNonTemporal, unsigned Alignment);
SDValue getIndexedLoad(SDValue OrigLoad, DebugLoc dl, SDValue Base,
SDValue Offset, ISD::MemIndexedMode AM);
SDValue getLoad(ISD::MemIndexedMode AM, DebugLoc dl, ISD::LoadExtType ExtType,
EVT VT, SDValue Chain, SDValue Ptr, SDValue Offset,
const Value *SV, int SVOffset, EVT MemVT,
- bool isVolatile=false, unsigned Alignment=0);
+ bool isVolatile, bool isNonTemporal, unsigned Alignment);
SDValue getLoad(ISD::MemIndexedMode AM, DebugLoc dl, ISD::LoadExtType ExtType,
EVT VT, SDValue Chain, SDValue Ptr, SDValue Offset,
EVT MemVT, MachineMemOperand *MMO);
/// getStore - Helper function to build ISD::STORE nodes.
///
SDValue getStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
- const Value *SV, int SVOffset, bool isVolatile=false,
- unsigned Alignment=0);
+ const Value *SV, int SVOffset, bool isVolatile,
+ bool isNonTemporal, unsigned Alignment);
SDValue getStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
MachineMemOperand *MMO);
SDValue getTruncStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
- const Value *SV, int SVOffset, EVT TVT,
- bool isVolatile=false, unsigned Alignment=0);
+ const Value *SV, int SVOffset, EVT TVT,
+ bool isNonTemporal, bool isVolatile,
+ unsigned Alignment);
SDValue getTruncStore(SDValue Chain, DebugLoc dl, SDValue Val, SDValue Ptr,
EVT TVT, MachineMemOperand *MMO);
SDValue getIndexedStore(SDValue OrigStoe, DebugLoc dl, SDValue Base,
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, SDVTList VTs,
const SDValue *Ops, unsigned NumOps);
- /// MorphNodeTo - These *mutate* the specified node to have the specified
+ /// MorphNodeTo - This *mutates* the specified node to have the specified
/// return type, opcode, and operands.
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT, SDValue Op1);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT,
- SDValue Op1, SDValue Op2);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT,
- SDValue Op1, SDValue Op2, SDValue Op3);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT,
- const SDValue *Ops, unsigned NumOps);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT1, EVT VT2);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT1,
- EVT VT2, const SDValue *Ops, unsigned NumOps);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT1,
- EVT VT2, EVT VT3, const SDValue *Ops, unsigned NumOps);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT1,
- EVT VT2, SDValue Op1);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT1,
- EVT VT2, SDValue Op1, SDValue Op2);
- SDNode *MorphNodeTo(SDNode *N, unsigned Opc, EVT VT1,
- EVT VT2, SDValue Op1, SDValue Op2, SDValue Op3);
SDNode *MorphNodeTo(SDNode *N, unsigned Opc, SDVTList VTs,
const SDValue *Ops, unsigned NumOps);
}
}
+ /// AssignOrdering - Assign an order to the SDNode.
+ void AssignOrdering(const SDNode *SD, unsigned Order);
+
+ /// GetOrdering - Get the order for the SDNode.
+ unsigned GetOrdering(const SDNode *SD) const;
+
+ /// AssignDbgInfo - Assign debug info to the SDNode.
+ void AssignDbgInfo(SDNode *SD, SDDbgValue *db);
+
+ /// RememberDbgInfo - Remember debug info with no associated SDNode.
+ void RememberDbgInfo(SDDbgValue *db);
+
+ /// GetDbgInfo - Get the debug info for the SDNode.
+ SDDbgValue *GetDbgInfo(const SDNode* SD);
+
+ SDDbgInfo::ConstDbgIterator DbgConstBegin() {
+ return DbgInfo->DbgConstBegin();
+ }
+ SDDbgInfo::ConstDbgIterator DbgConstEnd() { return DbgInfo->DbgConstEnd(); }
+
void dump() const;
/// CreateStackTemporary - Create a stack temporary, suitable for holding the
/// isKnownNeverNan - Test whether the given SDValue is known to never be NaN.
bool isKnownNeverNaN(SDValue Op) const;
+ /// isKnownNeverZero - Test whether the given SDValue is known to never be
+ /// positive or negative Zero.
+ bool isKnownNeverZero(SDValue Op) const;
+
+ /// isEqualTo - Test whether two SDValues are known to compare equal. This
+ /// is true if they are the same value, or if one is negative zero and the
+ /// other positive zero.
+ bool isEqualTo(SDValue A, SDValue B) const;
+
/// isVerifiedDebugInfoDesc - Returns true if the specified SDValue has
/// been verified as a debug information descriptor.
bool isVerifiedDebugInfoDesc(SDValue Op) const;
/// element of the result of the vector shuffle.
SDValue getShuffleScalarElt(const ShuffleVectorSDNode *N, unsigned Idx);
+ /// UnrollVectorOp - Utility function used by legalize and lowering to
+ /// "unroll" a vector operation by splitting out the scalars and operating
+ /// on each element individually. If the ResNE is 0, fully unroll the vector
+ /// op. If ResNE is less than the width of the vector op, unroll up to ResNE.
+ /// If the ResNE is greater than the width of the vector op, unroll the
+ /// vector op and fill the end of the resulting vector with UNDEFS.
+ SDValue UnrollVectorOp(SDNode *N, unsigned ResNE = 0);
+
+ /// isConsecutiveLoad - Return true if LD is loading 'Bytes' bytes from a
+ /// location that is 'Dist' units away from the location that the 'Base' load
+ /// is loading from.
+ bool isConsecutiveLoad(LoadSDNode *LD, LoadSDNode *Base,
+ unsigned Bytes, int Dist) const;
+
+ /// InferPtrAlignment - Infer alignment of a load / store address. Return 0 if
+ /// it cannot be inferred.
+ unsigned InferPtrAlignment(SDValue Ptr) const;
+
private:
bool RemoveNodeFromCSEMaps(SDNode *N);
void AddModifiedNodeToCSEMaps(SDNode *N, DAGUpdateListener *UpdateListener);
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