SelectionDAG.h revision ff66368a5f83ed62cb7817efc4a16b78c449a4c0
1c3aae25116e66c177579b0b79182b09340b19753Chris Lattner//===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===// 2ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 36fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// The LLVM Compiler Infrastructure 46fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// 56fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// This file was developed by the LLVM research group and is distributed under 66fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// the University of Illinois Open Source License. See LICENSE.TXT for details. 7ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 86fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell//===----------------------------------------------------------------------===// 9ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 10c3aae25116e66c177579b0b79182b09340b19753Chris Lattner// This file declares the SelectionDAG class, and transitively defines the 11c3aae25116e66c177579b0b79182b09340b19753Chris Lattner// SDNode class and subclasses. 12ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 13cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner//===----------------------------------------------------------------------===// 14cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 15cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner#ifndef LLVM_CODEGEN_SELECTIONDAG_H 16cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner#define LLVM_CODEGEN_SELECTIONDAG_H 17cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 18c3aae25116e66c177579b0b79182b09340b19753Chris Lattner#include "llvm/CodeGen/SelectionDAGNodes.h" 19cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner#include <map> 20c3aae25116e66c177579b0b79182b09340b19753Chris Lattner#include <string> // FIXME remove eventually, turning map into const char* map. 21d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 22d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 23c3aae25116e66c177579b0b79182b09340b19753Chris Lattner class TargetLowering; 24c3aae25116e66c177579b0b79182b09340b19753Chris Lattner class TargetMachine; 25c3aae25116e66c177579b0b79182b09340b19753Chris Lattner class MachineFunction; 26c3aae25116e66c177579b0b79182b09340b19753Chris Lattner 27c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// SelectionDAG class - This is used to represent a portion of an LLVM function 28c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// in a low-level Data Dependence DAG representation suitable for instruction 29c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// selection. This DAG is constructed as the first step of instruction 30c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// selection in order to allow implementation of machine specific optimizations 31c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// and code simplifications. 32c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// 33c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// The representation used by the SelectionDAG is a target-independent 34c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// representation, which has some similarities to the GCC RTL representation, 35c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// but is significantly more simple, powerful, and is a graph form instead of a 36c3aae25116e66c177579b0b79182b09340b19753Chris Lattner/// linear form. 37cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner/// 38cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattnerclass SelectionDAG { 39063287a76b5d1486f498fcf674a26d1155471a3fChris Lattner TargetLowering &TLI; 40c3aae25116e66c177579b0b79182b09340b19753Chris Lattner MachineFunction &MF; 41cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 42c3aae25116e66c177579b0b79182b09340b19753Chris Lattner // Root - The root of the entire DAG. EntryNode - The starting token. 43c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand Root, EntryNode; 44cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 45cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner // AllNodes - All of the nodes in the DAG 46c3aae25116e66c177579b0b79182b09340b19753Chris Lattner std::vector<SDNode*> AllNodes; 47691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth 48691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth // ValueNodes - track SrcValue nodes 49691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth std::map<std::pair<const Value*, int>, SDNode*> ValueNodes; 50691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth 51cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattnerpublic: 52063287a76b5d1486f498fcf674a26d1155471a3fChris Lattner SelectionDAG(TargetLowering &tli, MachineFunction &mf) : TLI(tli), MF(mf) { 53c3aae25116e66c177579b0b79182b09340b19753Chris Lattner EntryNode = Root = getNode(ISD::EntryToken, MVT::Other); 54c3aae25116e66c177579b0b79182b09340b19753Chris Lattner } 55cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner ~SelectionDAG(); 56cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 57c3aae25116e66c177579b0b79182b09340b19753Chris Lattner MachineFunction &getMachineFunction() const { return MF; } 58063287a76b5d1486f498fcf674a26d1155471a3fChris Lattner const TargetMachine &getTarget() const; 59063287a76b5d1486f498fcf674a26d1155471a3fChris Lattner TargetLowering &getTargetLoweringInfo() const { return TLI; } 60cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 611080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner /// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'. 621080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner /// 631080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner void viewGraph(); 641080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner 651080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner 661080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner typedef std::vector<SDNode*>::const_iterator allnodes_iterator; 671080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner allnodes_iterator allnodes_begin() const { return AllNodes.begin(); } 681080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner allnodes_iterator allnodes_end() const { return AllNodes.end(); } 69ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 70c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// getRoot - Return the root tag of the SelectionDAG. 71cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner /// 72c3aae25116e66c177579b0b79182b09340b19753Chris Lattner const SDOperand &getRoot() const { return Root; } 73cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 74c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// getEntryNode - Return the token chain corresponding to the entry of the 75c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// function. 76c3aae25116e66c177579b0b79182b09340b19753Chris Lattner const SDOperand &getEntryNode() const { return EntryNode; } 77cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 78c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// setRoot - Set the current root tag of the SelectionDAG. 79cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner /// 80c3aae25116e66c177579b0b79182b09340b19753Chris Lattner const SDOperand &setRoot(SDOperand N) { return Root = N; } 81cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 82c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// Legalize - This transforms the SelectionDAG into a SelectionDAG that is 83c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// compatible with the target instruction selector, as indicated by the 84c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// TargetLowering object. 85cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner /// 86c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// Note that this is an involved process that may invalidate pointers into 87c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// the graph. 88063287a76b5d1486f498fcf674a26d1155471a3fChris Lattner void Legalize(); 89c3aae25116e66c177579b0b79182b09340b19753Chris Lattner 90d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner /// RemoveDeadNodes - This method deletes all unreachable nodes in the 91d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner /// SelectionDAG, including nodes (like loads) that have uses of their token 92d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner /// chain but no other uses and no side effect. If a node is passed in as an 93d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner /// argument, it is used as the seed for node deletion. 94d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner void RemoveDeadNodes(SDNode *N = 0); 95d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner 96c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getConstant(uint64_t Val, MVT::ValueType VT); 97c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getConstantFP(double Val, MVT::ValueType VT); 98c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT); 99c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getFrameIndex(int FI, MVT::ValueType VT); 100c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getConstantPool(unsigned CPIdx, MVT::ValueType VT); 101c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getBasicBlock(MachineBasicBlock *MBB); 102c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT); 10315e4b01920d6a0ffbe35d3e5aa88a4b42970b6a7Chris Lattner SDOperand getValueType(MVT::ValueType); 104c3aae25116e66c177579b0b79182b09340b19753Chris Lattner 1059ffdfb6bae9a8befd23e002f71f08aa42caee627Chris Lattner SDOperand getCopyToReg(SDOperand Chain, SDOperand N, unsigned Reg) { 106c3aae25116e66c177579b0b79182b09340b19753Chris Lattner // Note: these are auto-CSE'd because the caller doesn't make requests that 107c3aae25116e66c177579b0b79182b09340b19753Chris Lattner // could cause duplicates to occur. 10860e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner SDNode *NN = new RegSDNode(ISD::CopyToReg, Chain, N, Reg); 10960e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner NN->setValueTypes(MVT::Other); 110c3aae25116e66c177579b0b79182b09340b19753Chris Lattner AllNodes.push_back(NN); 111c3aae25116e66c177579b0b79182b09340b19753Chris Lattner return SDOperand(NN, 0); 112cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner } 113cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 11460e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner SDOperand getCopyFromReg(unsigned Reg, MVT::ValueType VT, SDOperand Chain) { 115c3aae25116e66c177579b0b79182b09340b19753Chris Lattner // Note: These nodes are auto-CSE'd by the caller of this method. 11660e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner SDNode *NN = new RegSDNode(ISD::CopyFromReg, Chain, Reg); 11760e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner NN->setValueTypes(VT, MVT::Other); 11818c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner AllNodes.push_back(NN); 11918c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner return SDOperand(NN, 0); 12018c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner } 12118c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner 1221cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner SDOperand getImplicitDef(SDOperand Chain, unsigned Reg) { 12318c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner // Note: These nodes are auto-CSE'd by the caller of this method. 12460e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner SDNode *NN = new RegSDNode(ISD::ImplicitDef, Chain, Reg); 12560e4878f9414227a92fec423d5fc39f0d00a2478Chris Lattner NN->setValueTypes(MVT::Other); 126c3aae25116e66c177579b0b79182b09340b19753Chris Lattner AllNodes.push_back(NN); 127c3aae25116e66c177579b0b79182b09340b19753Chris Lattner return SDOperand(NN, 0); 128cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner } 129cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 130c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// getCall - Note that this destroys the vector of RetVals passed in. 131c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// 132c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain, 1334c1eae9fb329e0e371d453957c56426294de24e9Chris Lattner SDOperand Callee, bool isTailCall = false) { 1344211e73c4905af413db7524f24414c16a7f69102Chris Lattner SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, Chain, 1354211e73c4905af413db7524f24414c16a7f69102Chris Lattner Callee); 136c3aae25116e66c177579b0b79182b09340b19753Chris Lattner NN->setValueTypes(RetVals); 137c3aae25116e66c177579b0b79182b09340b19753Chris Lattner AllNodes.push_back(NN); 138c3aae25116e66c177579b0b79182b09340b19753Chris Lattner return NN; 139cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner } 140cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 14102b86f52ed19213ef4911da902145155c03fb136Chris Lattner /// getCall - This is identical to the one above, and should be used for calls 14202b86f52ed19213ef4911da902145155c03fb136Chris Lattner /// where arguments are passed in physical registers. This destroys the 14302b86f52ed19213ef4911da902145155c03fb136Chris Lattner /// RetVals and ArgsInRegs vectors. 14402b86f52ed19213ef4911da902145155c03fb136Chris Lattner SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain, 1454211e73c4905af413db7524f24414c16a7f69102Chris Lattner SDOperand Callee, std::vector<SDOperand> &ArgsInRegs, 1464211e73c4905af413db7524f24414c16a7f69102Chris Lattner bool isTailCall = false) { 14702b86f52ed19213ef4911da902145155c03fb136Chris Lattner ArgsInRegs.insert(ArgsInRegs.begin(), Callee); 14802b86f52ed19213ef4911da902145155c03fb136Chris Lattner ArgsInRegs.insert(ArgsInRegs.begin(), Chain); 1494c1eae9fb329e0e371d453957c56426294de24e9Chris Lattner SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, ArgsInRegs); 15002b86f52ed19213ef4911da902145155c03fb136Chris Lattner NN->setValueTypes(RetVals); 15102b86f52ed19213ef4911da902145155c03fb136Chris Lattner AllNodes.push_back(NN); 15202b86f52ed19213ef4911da902145155c03fb136Chris Lattner return NN; 15302b86f52ed19213ef4911da902145155c03fb136Chris Lattner } 15402b86f52ed19213ef4911da902145155c03fb136Chris Lattner 1557cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner SDOperand getCondCode(ISD::CondCode Cond); 156cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 1571ccae666f596d5aeca5c9942995763600b622062Chris Lattner /// getZeroExtendInReg - Return the expression required to zero extend the Op 1581ccae666f596d5aeca5c9942995763600b622062Chris Lattner /// value assuming it was the smaller SrcTy value. 1591ccae666f596d5aeca5c9942995763600b622062Chris Lattner SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy); 1601ccae666f596d5aeca5c9942995763600b622062Chris Lattner 161c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// getNode - Gets or creates the specified node. 162cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner /// 163c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getNode(unsigned Opcode, MVT::ValueType VT); 164c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N); 165c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 166c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand N1, SDOperand N2); 167c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 168c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand N1, SDOperand N2, SDOperand N3); 169c3aae25116e66c177579b0b79182b09340b19753Chris Lattner SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 1702d86ea21dd76647cb054fd5d27df9e49efc672b6Andrew Lenharth SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4); 1712d86ea21dd76647cb054fd5d27df9e49efc672b6Andrew Lenharth SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 172f7db8c69a12582c7d1ff7c5f25c948dca2dbf7dcChris Lattner SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4, 173f7db8c69a12582c7d1ff7c5f25c948dca2dbf7dcChris Lattner SDOperand N5); 174f7db8c69a12582c7d1ff7c5f25c948dca2dbf7dcChris Lattner SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 175c3aae25116e66c177579b0b79182b09340b19753Chris Lattner std::vector<SDOperand> &Children); 1764211e73c4905af413db7524f24414c16a7f69102Chris Lattner SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys, 1774211e73c4905af413db7524f24414c16a7f69102Chris Lattner std::vector<SDOperand> &Ops); 178c3aae25116e66c177579b0b79182b09340b19753Chris Lattner 1797cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner /// getSetCC - Helper function to make it easier to build SetCC's if you just 1807cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner /// have an ISD::CondCode instead of an SDOperand. 1817cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner /// 1827cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS, 1837cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner ISD::CondCode Cond) { 1847cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond)); 1857cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner } 1869373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman 1879373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman /// getSelectCC - Helper function to make it easier to build SelectCC's if you 1889373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman /// just have an ISD::CondCode instead of an SDOperand. 1899373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman /// 1909373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman SDOperand getSelectCC(SDOperand LHS, SDOperand RHS, 1919373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman SDOperand True, SDOperand False, ISD::CondCode Cond) { 1929373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman MVT::ValueType VT = True.getValueType(); 1939373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond)); 1949373a81e53ce5f9f2c06c4209b8b886605aece08Nate Begeman } 1957cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner 196c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// getLoad - Loads are not normal binary operators: their result type is not 197c3aae25116e66c177579b0b79182b09340b19753Chris Lattner /// determined by their operands, and they produce a value AND a token chain. 198cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner /// 19921074f43ed5165828717ea3606eb2bd222a39b26Chris Lattner SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr, 20021074f43ed5165828717ea3606eb2bd222a39b26Chris Lattner SDOperand SV); 2015f056bf4b862a7c31388a68711dd3b3ed5de2be8Chris Lattner SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain, 2025f056bf4b862a7c31388a68711dd3b3ed5de2be8Chris Lattner SDOperand Ptr, SDOperand SV, MVT::ValueType EVT); 2032d86ea21dd76647cb054fd5d27df9e49efc672b6Andrew Lenharth 2042d86ea21dd76647cb054fd5d27df9e49efc672b6Andrew Lenharth // getSrcValue - construct a node to track a Value* through the backend 205691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth SDOperand getSrcValue(const Value* I, int offset = 0); 206cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 207c3aae25116e66c177579b0b79182b09340b19753Chris Lattner void replaceAllUsesWith(SDOperand Old, SDOperand New) { 208c3aae25116e66c177579b0b79182b09340b19753Chris Lattner assert(Old != New && "RAUW self!"); 209c3aae25116e66c177579b0b79182b09340b19753Chris Lattner assert(0 && "Unimplemented!"); 210cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner } 211cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 212cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner void dump() const; 213d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner 214d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattnerprivate: 215d1fc96499b7619356c7542200d32da898b79f7c1Chris Lattner void DeleteNodeIfDead(SDNode *N, void *NodeSet); 2167cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner 21732c392a3a5e397b5f1cc83aaedfab96368d11e8aNate Begeman /// SimplifySetCC - Try to simplify a setcc built with the specified operands 21832c392a3a5e397b5f1cc83aaedfab96368d11e8aNate Begeman /// and cc. If unable to simplify it, return a null SDOperand. 2194cf009f49cd37ae9cf4096dfe7ee9bcfa8e59b7aChris Lattner SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1, 2204cf009f49cd37ae9cf4096dfe7ee9bcfa8e59b7aChris Lattner SDOperand N2, ISD::CondCode Cond); 2211cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner 22232c392a3a5e397b5f1cc83aaedfab96368d11e8aNate Begeman /// SimplifySelectCC - Try to simplify a select_cc built with the specified 22332c392a3a5e397b5f1cc83aaedfab96368d11e8aNate Begeman /// operands and cc. This can be used to simplify both the select_cc node, 22432c392a3a5e397b5f1cc83aaedfab96368d11e8aNate Begeman /// and a select node whose first operand is a setcc. 225ff66368a5f83ed62cb7817efc4a16b78c449a4c0Nate Begeman SDOperand SimplifySelectCC(SDOperand N1, SDOperand N2, SDOperand N3, 226ff66368a5f83ed62cb7817efc4a16b78c449a4c0Nate Begeman SDOperand N4, ISD::CondCode CC); 22732c392a3a5e397b5f1cc83aaedfab96368d11e8aNate Begeman 2281cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner // Maps to auto-CSE operations. 2291cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >, 2301cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner SDNode *> UnaryOps; 2311cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >, 2321cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner SDNode *> BinaryOps; 2331cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner 2347cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner std::vector<CondCodeSDNode*> CondCodeNodes; 2351cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner 2361cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >, 2371cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner SDNode *> Loads; 2381cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner 2391cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<const GlobalValue*, SDNode*> GlobalValues; 2401cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants; 241b29cb29364d3e22f062c695d2d5740dda42d8e8eChris Lattner std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs; 2421cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<int, SDNode*> FrameIndices; 2431cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<unsigned, SDNode*> ConstantPoolIndices; 2441cff05c7c216eea0e9173738c2a60b70c2b3c013Chris Lattner std::map<MachineBasicBlock *, SDNode*> BBNodes; 24515e4b01920d6a0ffbe35d3e5aa88a4b42970b6a7Chris Lattner std::vector<SDNode*> ValueTypeNodes; 2465f056bf4b862a7c31388a68711dd3b3ed5de2be8Chris Lattner std::map<std::string, SDNode*> ExternalSymbols; 2474211e73c4905af413db7524f24414c16a7f69102Chris Lattner std::map<std::pair<unsigned, 2486765bfed31f06d7ed2f5a87248ffadc9dce10de4Chris Lattner std::pair<MVT::ValueType, std::vector<SDOperand> > >, 2496765bfed31f06d7ed2f5a87248ffadc9dce10de4Chris Lattner SDNode*> OneResultNodes; 2506765bfed31f06d7ed2f5a87248ffadc9dce10de4Chris Lattner std::map<std::pair<unsigned, 2514211e73c4905af413db7524f24414c16a7f69102Chris Lattner std::pair<std::vector<MVT::ValueType>, 2524211e73c4905af413db7524f24414c16a7f69102Chris Lattner std::vector<SDOperand> > >, 2534211e73c4905af413db7524f24414c16a7f69102Chris Lattner SDNode*> ArbitraryNodes; 254cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner}; 255cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 2561080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattnertemplate <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> { 2571080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner typedef SelectionDAG::allnodes_iterator nodes_iterator; 2581080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner static nodes_iterator nodes_begin(SelectionDAG *G) { 2591080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner return G->allnodes_begin(); 2601080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner } 2611080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner static nodes_iterator nodes_end(SelectionDAG *G) { 2621080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner return G->allnodes_end(); 2631080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner } 2641080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner}; 2651080b9ee534579c67f7c99364cc6fa11edbcd919Chris Lattner 266cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner} 267cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner 268cacf462915344c2af25eef1af1f3ee2c7280ff56Chris Lattner#endif 269