//===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===//
-//
+//
// 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 declares the SelectionDAG class, and transitively defines the
// SDNode class and subclasses.
-//
+//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_SELECTIONDAG_H
/// linear form.
///
class SelectionDAG {
- const TargetMachine &TM;
+ TargetLowering &TLI;
MachineFunction &MF;
// Root - The root of the entire DAG. EntryNode - The starting token.
// AllNodes - All of the nodes in the DAG
std::vector<SDNode*> AllNodes;
+
+ // ValueNodes - track SrcValue nodes
+ std::map<std::pair<const Value*, int>, SDNode*> ValueNodes;
+
public:
- SelectionDAG(const TargetMachine &tm, MachineFunction &mf) : TM(tm), MF(mf) {
+ SelectionDAG(TargetLowering &tli, MachineFunction &mf) : TLI(tli), MF(mf) {
EntryNode = Root = getNode(ISD::EntryToken, MVT::Other);
}
~SelectionDAG();
MachineFunction &getMachineFunction() const { return MF; }
- const TargetMachine &getTarget() { return TM; }
+ const TargetMachine &getTarget() const;
+ TargetLowering &getTargetLoweringInfo() const { return TLI; }
/// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'.
///
typedef std::vector<SDNode*>::const_iterator allnodes_iterator;
allnodes_iterator allnodes_begin() const { return AllNodes.begin(); }
allnodes_iterator allnodes_end() const { return AllNodes.end(); }
-
+
/// getRoot - Return the root tag of the SelectionDAG.
///
const SDOperand &getRoot() const { return Root; }
///
/// Note that this is an involved process that may invalidate pointers into
/// the graph.
- void Legalize(TargetLowering &TLI);
+ void Legalize();
/// RemoveDeadNodes - This method deletes all unreachable nodes in the
/// SelectionDAG, including nodes (like loads) that have uses of their token
SDOperand getCopyToReg(SDOperand Chain, SDOperand N, unsigned Reg) {
// Note: these are auto-CSE'd because the caller doesn't make requests that
// could cause duplicates to occur.
- SDNode *NN = new RegSDNode(ISD::CopyToReg, MVT::Other, Chain, N, Reg);
+ SDNode *NN = new RegSDNode(ISD::CopyToReg, Chain, N, Reg);
+ NN->setValueTypes(MVT::Other);
AllNodes.push_back(NN);
return SDOperand(NN, 0);
}
- SDOperand getCopyFromReg(unsigned Reg, MVT::ValueType VT) {
+ SDOperand getCopyFromReg(unsigned Reg, MVT::ValueType VT, SDOperand Chain) {
// Note: These nodes are auto-CSE'd by the caller of this method.
- SDNode *NN = new RegSDNode(ISD::CopyFromReg, VT, Reg);
+ SDNode *NN = new RegSDNode(ISD::CopyFromReg, Chain, Reg);
+ NN->setValueTypes(VT, MVT::Other);
AllNodes.push_back(NN);
return SDOperand(NN, 0);
}
SDOperand getImplicitDef(SDOperand Chain, unsigned Reg) {
// Note: These nodes are auto-CSE'd by the caller of this method.
- SDNode *NN = new RegSDNode(ISD::ImplicitDef, MVT::Other, Chain, Reg);
+ SDNode *NN = new RegSDNode(ISD::ImplicitDef, Chain, Reg);
+ NN->setValueTypes(MVT::Other);
AllNodes.push_back(NN);
return SDOperand(NN, 0);
}
/// getCall - Note that this destroys the vector of RetVals passed in.
///
SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain,
- SDOperand Callee) {
- SDNode *NN = new SDNode(ISD::CALL, Chain, Callee);
+ SDOperand Callee, bool isTailCall = false) {
+ SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, Chain,
+ Callee);
NN->setValueTypes(RetVals);
AllNodes.push_back(NN);
return NN;
}
- SDOperand getSetCC(ISD::CondCode, SDOperand LHS, SDOperand RHS);
+ /// getCall - This is identical to the one above, and should be used for calls
+ /// where arguments are passed in physical registers. This destroys the
+ /// RetVals and ArgsInRegs vectors.
+ SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain,
+ SDOperand Callee, std::vector<SDOperand> &ArgsInRegs,
+ bool isTailCall = false) {
+ ArgsInRegs.insert(ArgsInRegs.begin(), Callee);
+ ArgsInRegs.insert(ArgsInRegs.begin(), Chain);
+ SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, ArgsInRegs);
+ NN->setValueTypes(RetVals);
+ AllNodes.push_back(NN);
+ return NN;
+ }
+
+
+ SDOperand getSetCC(ISD::CondCode, MVT::ValueType VT,
+ SDOperand LHS, SDOperand RHS);
+
+ /// getZeroExtendInReg - Return the expression required to zero extend the Op
+ /// value assuming it was the smaller SrcTy value.
+ SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy);
/// getNode - Gets or creates the specified node.
///
SDOperand N1, SDOperand N2);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
SDOperand N1, SDOperand N2, SDOperand N3);
+ SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
+ SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
std::vector<SDOperand> &Children);
+ SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
+ std::vector<SDOperand> &Ops);
// getNode - These versions take an extra value type for extending and
- // truncating loads and stores.
+ // truncating loads, stores, rounds, extends etc.
SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N1,
SDOperand N2, MVT::ValueType EVT);
+ SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
+ SDOperand N, MVT::ValueType EVT);
SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N1,
SDOperand N2, SDOperand N3, MVT::ValueType EVT);
+ SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N1,
+ SDOperand N2, SDOperand N3, SDOperand N4,
+ MVT::ValueType EVT);
+
/// 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);
+ SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
+ SDOperand SV);
+
+ // getSrcValue - construct a node to track a Value* through the backend
+ SDOperand getSrcValue(const Value* I, int offset = 0);
void replaceAllUsesWith(SDOperand Old, SDOperand New) {
assert(Old != New && "RAUW self!");
std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >,
SDNode *> BinaryOps;
- std::map<std::pair<std::pair<SDOperand, SDOperand>, ISD::CondCode>,
+ std::map<std::pair<std::pair<SDOperand, SDOperand>,
+ std::pair<ISD::CondCode, MVT::ValueType> >,
SetCCSDNode*> SetCCs;
std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >,
std::map<const GlobalValue*, SDNode*> GlobalValues;
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
- std::map<std::pair<double, MVT::ValueType>, SDNode*> ConstantFPs;
+ std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
std::map<int, SDNode*> FrameIndices;
std::map<unsigned, SDNode*> ConstantPoolIndices;
std::map<MachineBasicBlock *, SDNode*> BBNodes;
+ std::map<std::pair<unsigned,
+ std::pair<std::vector<MVT::ValueType>,
+ std::vector<SDOperand> > >,
+ SDNode*> ArbitraryNodes;
+
std::map<std::string, SDNode*> ExternalSymbols;
struct EVTStruct {
unsigned Opcode;
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