//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
class AliasAnalysis;
class TargetLowering;
class TargetMachine;
- class MachineDebugInfo;
+ class MachineModuleInfo;
class MachineFunction;
class MachineConstantPoolValue;
- class SDOperand;
/// SelectionDAG class - This is used to represent a portion of an LLVM function
/// in a low-level Data Dependence DAG representation suitable for instruction
class SelectionDAG {
TargetLowering &TLI;
MachineFunction &MF;
- MachineDebugInfo *DI;
+ MachineModuleInfo *MMI;
/// Root - The root of the entire DAG. EntryNode - The starting token.
SDOperand Root, EntryNode;
FoldingSet<SDNode> CSEMap;
public:
- SelectionDAG(TargetLowering &tli, MachineFunction &mf, MachineDebugInfo *di)
- : TLI(tli), MF(mf), DI(di) {
+ SelectionDAG(TargetLowering &tli, MachineFunction &mf, MachineModuleInfo *mmi)
+ : TLI(tli), MF(mf), MMI(mmi) {
EntryNode = Root = getNode(ISD::EntryToken, MVT::Other);
}
~SelectionDAG();
MachineFunction &getMachineFunction() const { return MF; }
const TargetMachine &getTarget() const;
TargetLowering &getTargetLoweringInfo() const { return TLI; }
- MachineDebugInfo *getMachineDebugInfo() const { return DI; }
+ MachineModuleInfo *getMachineModuleInfo() const { return MMI; }
/// viewGraph - Pop up a GraphViz/gv window with the DAG rendered using 'dot'.
///
/// generate any nodes that will be illegal on the target.
void Combine(bool AfterLegalize, AliasAnalysis &AA);
+ /// LegalizeTypes - This transforms the SelectionDAG into a SelectionDAG that
+ /// only uses types natively supported by the target.
+ ///
+ /// Note that this is an involved process that may invalidate pointers into
+ /// the graph.
+ void LegalizeTypes();
+
/// Legalize - This transforms the SelectionDAG into a SelectionDAG that is
/// compatible with the target instruction selector, as indicated by the
/// TargetLowering object.
/// SelectionDAG.
void RemoveDeadNodes();
- /// RemoveDeadNode - Remove the specified node from the system. If any of its
- /// operands then becomes dead, remove them as well. The vector Deleted is
- /// populated with nodes that are deleted.
- void RemoveDeadNode(SDNode *N, std::vector<SDNode*> &Deleted);
-
/// DeleteNode - Remove the specified node from the system. This node must
/// have no referrers.
void DeleteNode(SDNode *N);
MVT::ValueType VT3) {
return getVTList(VT1, VT2, VT3).VTs;
}
- const MVT::ValueType *getNodeValueTypes(std::vector<MVT::ValueType> &VTList) {
- return getVTList(&VTList[0], VTList.size()).VTs;
+ const MVT::ValueType *getNodeValueTypes(std::vector<MVT::ValueType> &vtList) {
+ return getVTList(&vtList[0], (unsigned)vtList.size()).VTs;
}
//
SDOperand getString(const std::string &Val);
SDOperand getConstant(uint64_t Val, MVT::ValueType VT, bool isTarget = false);
+ SDOperand getConstant(const APInt &Val, MVT::ValueType VT, bool isTarget = false);
+ SDOperand getIntPtrConstant(uint64_t Val, bool isTarget = false);
SDOperand getTargetConstant(uint64_t Val, MVT::ValueType VT) {
return getConstant(Val, VT, true);
}
+ SDOperand getTargetConstant(const APInt &Val, MVT::ValueType VT) {
+ return getConstant(Val, VT, true);
+ }
SDOperand getConstantFP(double Val, MVT::ValueType VT, bool isTarget = false);
+ SDOperand getConstantFP(const APFloat& Val, MVT::ValueType VT,
+ bool isTarget = false);
SDOperand getTargetConstantFP(double Val, MVT::ValueType VT) {
return getConstantFP(Val, VT, true);
}
+ SDOperand getTargetConstantFP(const APFloat& Val, MVT::ValueType VT) {
+ return getConstantFP(Val, VT, true);
+ }
SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT,
int offset = 0, bool isTargetGA = false);
SDOperand getTargetGlobalAddress(const GlobalValue *GV, MVT::ValueType VT,
SDOperand getBasicBlock(MachineBasicBlock *MBB);
SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
+ SDOperand getArgFlags(ISD::ArgFlagsTy Flags);
SDOperand getValueType(MVT::ValueType);
SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
return getNode(ISD::CALLSEQ_START, VTs, 2, Ops, 2);
}
+ /// getCALLSEQ_END - Return a new CALLSEQ_END node, which always must have a
+ /// flag result (to ensure it's not CSE'd).
+ SDOperand getCALLSEQ_END(SDOperand Chain, SDOperand Op1, SDOperand Op2,
+ SDOperand InFlag) {
+ SDVTList NodeTys = getVTList(MVT::Other, MVT::Flag);
+ SmallVector<SDOperand, 4> Ops;
+ Ops.push_back(Chain);
+ Ops.push_back(Op1);
+ Ops.push_back(Op2);
+ Ops.push_back(InFlag);
+ return getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0],
+ (unsigned)Ops.size() - (InFlag.Val == 0 ? 1 : 0));
+ }
+
/// getNode - Gets or creates the specified node.
///
SDOperand getNode(unsigned Opcode, MVT::ValueType VT);
SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
SDOperand N5);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
SDOperand getNode(unsigned Opcode, const MVT::ValueType *VTs, unsigned NumVTs,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
+ SDOperand getNode(unsigned Opcode, SDVTList VTs);
+ SDOperand getNode(unsigned Opcode, SDVTList VTs, SDOperand N);
SDOperand getNode(unsigned Opcode, SDVTList VTs,
- const SDOperand *Ops, unsigned NumOps);
-
+ SDOperand N1, SDOperand N2);
+ SDOperand getNode(unsigned Opcode, SDVTList VTs,
+ SDOperand N1, SDOperand N2, SDOperand N3);
+ SDOperand getNode(unsigned Opcode, SDVTList VTs,
+ SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
+ SDOperand getNode(unsigned Opcode, SDVTList VTs,
+ SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
+ SDOperand N5);
+ SDOperand getNode(unsigned Opcode, SDVTList VTs,
+ SDOperandPtr Ops, unsigned NumOps);
+
+ SDOperand getMemcpy(SDOperand Chain, SDOperand Dst, SDOperand Src,
+ SDOperand Size, unsigned Align,
+ bool AlwaysInline,
+ const Value *DstSV, uint64_t DstSVOff,
+ const Value *SrcSV, uint64_t SrcSVOff);
+
+ SDOperand getMemmove(SDOperand Chain, SDOperand Dst, SDOperand Src,
+ SDOperand Size, unsigned Align,
+ const Value *DstSV, uint64_t DstOSVff,
+ const Value *SrcSV, uint64_t SrcSVOff);
+
+ SDOperand getMemset(SDOperand Chain, SDOperand Dst, SDOperand Src,
+ SDOperand Size, unsigned Align,
+ const Value *DstSV, uint64_t DstSVOff);
+
/// getSetCC - Helper function to make it easier to build SetCC's if you just
/// have an ISD::CondCode instead of an SDOperand.
///
return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond));
}
+ /// getVSetCC - Helper function to make it easier to build VSetCC's nodes
+ /// if you just have an ISD::CondCode instead of an SDOperand.
+ ///
+ SDOperand getVSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS,
+ ISD::CondCode Cond) {
+ return getNode(ISD::VSETCC, VT, LHS, RHS, getCondCode(Cond));
+ }
+
/// getSelectCC - Helper function to make it easier to build SelectCC's if you
/// just have an ISD::CondCode instead of an SDOperand.
///
SDOperand getVAArg(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
SDOperand SV);
+ /// getAtomic - Gets a node for an atomic op, produces result and chain, takes
+ // 3 operands
+ SDOperand getAtomic(unsigned Opcode, SDOperand Chain, SDOperand Ptr,
+ SDOperand Cmp, SDOperand Swp, MVT::ValueType VT);
+
+ /// getAtomic - Gets a node for an atomic op, produces result and chain, takes
+ // 2 operands
+ SDOperand getAtomic(unsigned Opcode, SDOperand Chain, SDOperand Ptr,
+ SDOperand Val, MVT::ValueType VT);
+
/// getLoad - Loads are not normal binary operators: their result type is not
/// determined by their operands, and they produce a value AND a token chain.
///
SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
- const Value *SV, int SVOffset, bool isVolatile=false);
+ const Value *SV, int SVOffset, bool isVolatile=false,
+ unsigned Alignment=0);
SDOperand getExtLoad(ISD::LoadExtType ExtType, MVT::ValueType VT,
SDOperand Chain, SDOperand Ptr, const Value *SV,
- int SVOffset, MVT::ValueType EVT, bool isVolatile=false);
+ int SVOffset, MVT::ValueType EVT, bool isVolatile=false,
+ unsigned Alignment=0);
SDOperand getIndexedLoad(SDOperand OrigLoad, SDOperand Base,
- SDOperand Offset, ISD::MemOpAddrMode AM);
- SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain,
- SDOperand Ptr, SDOperand SV);
+ SDOperand Offset, ISD::MemIndexedMode AM);
+ SDOperand getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
+ MVT::ValueType VT, SDOperand Chain,
+ SDOperand Ptr, SDOperand Offset,
+ const Value *SV, int SVOffset, MVT::ValueType EVT,
+ bool isVolatile=false, unsigned Alignment=0);
/// getStore - Helper function to build ISD::STORE nodes.
///
- SDOperand getStore(SDOperand Chain, SDOperand Value, SDOperand Ptr,
- const Value *SV, int SVOffset, bool isVolatile=false);
- SDOperand getTruncStore(SDOperand Chain, SDOperand Value, SDOperand Ptr,
+ SDOperand getStore(SDOperand Chain, SDOperand Val, SDOperand Ptr,
+ const Value *SV, int SVOffset, bool isVolatile=false,
+ unsigned Alignment=0);
+ SDOperand getTruncStore(SDOperand Chain, SDOperand Val, SDOperand Ptr,
const Value *SV, int SVOffset, MVT::ValueType TVT,
- bool isVolatile=false);
+ bool isVolatile=false, unsigned Alignment=0);
+ SDOperand getIndexedStore(SDOperand OrigStoe, SDOperand Base,
+ SDOperand Offset, ISD::MemIndexedMode AM);
- // getSrcValue - construct a node to track a Value* through the backend
- SDOperand getSrcValue(const Value* I, int offset = 0);
+ // getSrcValue - Construct a node to track a Value* through the backend.
+ SDOperand getSrcValue(const Value *v);
+
+ // getMemOperand - Construct a node to track a memory reference
+ // through the backend.
+ SDOperand getMemOperand(const MachineMemOperand &MO);
/// UpdateNodeOperands - *Mutate* the specified node in-place to have the
/// specified operands. If the resultant node already exists in the DAG,
SDOperand Op3, SDOperand Op4);
SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
SDOperand Op3, SDOperand Op4, SDOperand Op5);
- SDOperand UpdateNodeOperands(SDOperand N, SDOperand *Ops, unsigned NumOps);
+ SDOperand UpdateNodeOperands(SDOperand N, SDOperandPtr Ops, unsigned NumOps);
/// SelectNodeTo - These are used for target selectors to *mutate* the
/// specified node to have the specified return type, Target opcode, and
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
SDOperand Op1, SDOperand Op2, SDOperand Op3);
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
SDNode *SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
SDOperand Op1, SDOperand Op2, SDOperand Op3);
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
+ SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
+ MVT::ValueType VT2);
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
MVT::ValueType VT2, SDOperand Op1);
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
SDOperand Op3);
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
MVT::ValueType VT2,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
MVT::ValueType VT2, MVT::ValueType VT3,
SDOperand Op1, SDOperand Op2);
+ SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
+ MVT::ValueType VT2, MVT::ValueType VT3,
+ SDOperand Op1, SDOperand Op2, SDOperand Op3);
SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
MVT::ValueType VT2, MVT::ValueType VT3,
- const SDOperand *Ops, unsigned NumOps);
+ SDOperandPtr Ops, unsigned NumOps);
+ SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
+ MVT::ValueType VT2, MVT::ValueType VT3,
+ MVT::ValueType VT4,
+ SDOperandPtr Ops, unsigned NumOps);
+ SDNode *getTargetNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
+ SDOperandPtr Ops, unsigned NumOps);
+
+ /// getNodeIfExists - Get the specified node if it's already available, or
+ /// else return NULL.
+ SDNode *getNodeIfExists(unsigned Opcode, SDVTList VTs,
+ SDOperandPtr Ops, unsigned NumOps);
+
+ /// DAGUpdateListener - Clients of various APIs that cause global effects on
+ /// the DAG can optionally implement this interface. This allows the clients
+ /// to handle the various sorts of updates that happen.
+ class DAGUpdateListener {
+ public:
+ virtual ~DAGUpdateListener();
+ virtual void NodeDeleted(SDNode *N) = 0;
+ virtual void NodeUpdated(SDNode *N) = 0;
+ };
+
+ /// RemoveDeadNode - Remove the specified node from the system. If any of its
+ /// operands then becomes dead, remove them as well. Inform UpdateListener
+ /// for each node deleted.
+ void RemoveDeadNode(SDNode *N, DAGUpdateListener *UpdateListener = 0);
/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
/// This can cause recursive merging of nodes in the DAG. Use the first
/// version if 'From' is known to have a single result, use the second
/// if you have two nodes with identical results, use the third otherwise.
///
- /// These methods all take an optional vector, which (if not null) is
- /// populated with any nodes that are deleted from the SelectionDAG, due to
- /// new equivalences that are discovered.
+ /// These methods all take an optional UpdateListener, which (if not null) is
+ /// informed about nodes that are deleted and modified due to recursive
+ /// changes in the dag.
///
void ReplaceAllUsesWith(SDOperand From, SDOperand Op,
- std::vector<SDNode*> *Deleted = 0);
+ DAGUpdateListener *UpdateListener = 0);
void ReplaceAllUsesWith(SDNode *From, SDNode *To,
- std::vector<SDNode*> *Deleted = 0);
- void ReplaceAllUsesWith(SDNode *From, const SDOperand *To,
- std::vector<SDNode*> *Deleted = 0);
+ DAGUpdateListener *UpdateListener = 0);
+ void ReplaceAllUsesWith(SDNode *From, SDOperandPtr To,
+ DAGUpdateListener *UpdateListener = 0);
/// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
- /// uses of other values produced by From.Val alone. The Deleted vector is
- /// handled the same was as for ReplaceAllUsesWith, but it is required for
- /// this method.
+ /// uses of other values produced by From.Val alone.
void ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To,
- std::vector<SDNode*> &Deleted);
+ DAGUpdateListener *UpdateListener = 0);
/// AssignNodeIds - Assign a unique node id for each node in the DAG based on
/// their allnodes order. It returns the maximum id.
/// isCommutativeBinOp - Returns true if the opcode is a commutative binary
/// operation.
static bool isCommutativeBinOp(unsigned Opcode) {
+ // FIXME: This should get its info from the td file, so that we can include
+ // target info.
switch (Opcode) {
case ISD::ADD:
case ISD::MUL:
case ISD::MULHU:
case ISD::MULHS:
+ case ISD::SMUL_LOHI:
+ case ISD::UMUL_LOHI:
case ISD::FADD:
case ISD::FMUL:
case ISD::AND:
void dump() const;
+ /// CreateStackTemporary - Create a stack temporary, suitable for holding the
+ /// specified value type.
+ SDOperand CreateStackTemporary(MVT::ValueType VT);
+
/// FoldSetCC - Constant fold a setcc to true or false.
SDOperand FoldSetCC(MVT::ValueType VT, SDOperand N1,
SDOperand N2, ISD::CondCode Cond);
+ /// SignBitIsZero - Return true if the sign bit of Op is known to be zero. We
+ /// use this predicate to simplify operations downstream.
+ bool SignBitIsZero(SDOperand Op, unsigned Depth = 0) const;
+
+ /// MaskedValueIsZero - Return true if 'Op & Mask' is known to be zero. We
+ /// use this predicate to simplify operations downstream. Op and Mask are
+ /// known to be the same type.
+ bool MaskedValueIsZero(SDOperand Op, const APInt &Mask, unsigned Depth = 0)
+ const;
+
+ /// ComputeMaskedBits - Determine which of the bits specified in Mask are
+ /// known to be either zero or one and return them in the KnownZero/KnownOne
+ /// bitsets. This code only analyzes bits in Mask, in order to short-circuit
+ /// processing. Targets can implement the computeMaskedBitsForTargetNode
+ /// method in the TargetLowering class to allow target nodes to be understood.
+ void ComputeMaskedBits(SDOperand Op, const APInt &Mask, APInt &KnownZero,
+ APInt &KnownOne, unsigned Depth = 0) const;
+
+ /// ComputeNumSignBits - Return the number of times the sign bit of the
+ /// register is replicated into the other bits. We know that at least 1 bit
+ /// is always equal to the sign bit (itself), but other cases can give us
+ /// information. For example, immediately after an "SRA X, 2", we know that
+ /// the top 3 bits are all equal to each other, so we return 3. Targets can
+ /// implement the ComputeNumSignBitsForTarget method in the TargetLowering
+ /// class to allow target nodes to be understood.
+ unsigned ComputeNumSignBits(SDOperand Op, unsigned Depth = 0) const;
+
+ /// isVerifiedDebugInfoDesc - Returns true if the specified SDOperand has
+ /// been verified as a debug information descriptor.
+ bool isVerifiedDebugInfoDesc(SDOperand Op) const;
+
+ /// getShuffleScalarElt - Returns the scalar element that will make up the ith
+ /// element of the result of the vector shuffle.
+ SDOperand getShuffleScalarElt(const SDNode *N, unsigned Idx);
+
private:
void RemoveNodeFromCSEMaps(SDNode *N);
SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
SDNode *FindModifiedNodeSlot(SDNode *N, SDOperand Op, void *&InsertPos);
SDNode *FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2,
void *&InsertPos);
- SDNode *FindModifiedNodeSlot(SDNode *N, const SDOperand *Ops, unsigned NumOps,
+ SDNode *FindModifiedNodeSlot(SDNode *N, SDOperandPtr Ops, unsigned NumOps,
void *&InsertPos);
void DeleteNodeNotInCSEMaps(SDNode *N);
std::vector<CondCodeSDNode*> CondCodeNodes;
std::vector<SDNode*> ValueTypeNodes;
+ std::map<MVT::ValueType, SDNode*> ExtendedValueTypeNodes;
std::map<std::string, SDNode*> ExternalSymbols;
std::map<std::string, SDNode*> TargetExternalSymbols;
std::map<std::string, StringSDNode*> StringNodes;
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