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      1 //===-- SelectionDAGDumper.cpp - Implement SelectionDAG::dump() -----------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This implements the SelectionDAG::dump method and friends.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "llvm/CodeGen/SelectionDAG.h"
     15 #include "ScheduleDAGSDNodes.h"
     16 #include "llvm/ADT/StringExtras.h"
     17 #include "llvm/CodeGen/MachineConstantPool.h"
     18 #include "llvm/CodeGen/MachineFunction.h"
     19 #include "llvm/CodeGen/MachineModuleInfo.h"
     20 #include "llvm/IR/DebugInfo.h"
     21 #include "llvm/IR/Function.h"
     22 #include "llvm/IR/Intrinsics.h"
     23 #include "llvm/Support/Debug.h"
     24 #include "llvm/Support/GraphWriter.h"
     25 #include "llvm/Support/raw_ostream.h"
     26 #include "llvm/Target/TargetInstrInfo.h"
     27 #include "llvm/Target/TargetIntrinsicInfo.h"
     28 #include "llvm/Target/TargetMachine.h"
     29 #include "llvm/Target/TargetRegisterInfo.h"
     30 #include "llvm/Target/TargetSubtargetInfo.h"
     31 using namespace llvm;
     32 
     33 std::string SDNode::getOperationName(const SelectionDAG *G) const {
     34   switch (getOpcode()) {
     35   default:
     36     if (getOpcode() < ISD::BUILTIN_OP_END)
     37       return "<<Unknown DAG Node>>";
     38     if (isMachineOpcode()) {
     39       if (G)
     40         if (const TargetInstrInfo *TII = G->getSubtarget().getInstrInfo())
     41           if (getMachineOpcode() < TII->getNumOpcodes())
     42             return TII->getName(getMachineOpcode());
     43       return "<<Unknown Machine Node #" + utostr(getOpcode()) + ">>";
     44     }
     45     if (G) {
     46       const TargetLowering &TLI = G->getTargetLoweringInfo();
     47       const char *Name = TLI.getTargetNodeName(getOpcode());
     48       if (Name) return Name;
     49       return "<<Unknown Target Node #" + utostr(getOpcode()) + ">>";
     50     }
     51     return "<<Unknown Node #" + utostr(getOpcode()) + ">>";
     52 
     53 #ifndef NDEBUG
     54   case ISD::DELETED_NODE:               return "<<Deleted Node!>>";
     55 #endif
     56   case ISD::PREFETCH:                   return "Prefetch";
     57   case ISD::ATOMIC_FENCE:               return "AtomicFence";
     58   case ISD::ATOMIC_CMP_SWAP:            return "AtomicCmpSwap";
     59   case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS: return "AtomicCmpSwapWithSuccess";
     60   case ISD::ATOMIC_SWAP:                return "AtomicSwap";
     61   case ISD::ATOMIC_LOAD_ADD:            return "AtomicLoadAdd";
     62   case ISD::ATOMIC_LOAD_SUB:            return "AtomicLoadSub";
     63   case ISD::ATOMIC_LOAD_AND:            return "AtomicLoadAnd";
     64   case ISD::ATOMIC_LOAD_OR:             return "AtomicLoadOr";
     65   case ISD::ATOMIC_LOAD_XOR:            return "AtomicLoadXor";
     66   case ISD::ATOMIC_LOAD_NAND:           return "AtomicLoadNand";
     67   case ISD::ATOMIC_LOAD_MIN:            return "AtomicLoadMin";
     68   case ISD::ATOMIC_LOAD_MAX:            return "AtomicLoadMax";
     69   case ISD::ATOMIC_LOAD_UMIN:           return "AtomicLoadUMin";
     70   case ISD::ATOMIC_LOAD_UMAX:           return "AtomicLoadUMax";
     71   case ISD::ATOMIC_LOAD:                return "AtomicLoad";
     72   case ISD::ATOMIC_STORE:               return "AtomicStore";
     73   case ISD::PCMARKER:                   return "PCMarker";
     74   case ISD::READCYCLECOUNTER:           return "ReadCycleCounter";
     75   case ISD::SRCVALUE:                   return "SrcValue";
     76   case ISD::MDNODE_SDNODE:              return "MDNode";
     77   case ISD::EntryToken:                 return "EntryToken";
     78   case ISD::TokenFactor:                return "TokenFactor";
     79   case ISD::AssertSext:                 return "AssertSext";
     80   case ISD::AssertZext:                 return "AssertZext";
     81 
     82   case ISD::BasicBlock:                 return "BasicBlock";
     83   case ISD::VALUETYPE:                  return "ValueType";
     84   case ISD::Register:                   return "Register";
     85   case ISD::RegisterMask:               return "RegisterMask";
     86   case ISD::Constant:
     87     if (cast<ConstantSDNode>(this)->isOpaque())
     88       return "OpaqueConstant";
     89     return "Constant";
     90   case ISD::ConstantFP:                 return "ConstantFP";
     91   case ISD::GlobalAddress:              return "GlobalAddress";
     92   case ISD::GlobalTLSAddress:           return "GlobalTLSAddress";
     93   case ISD::FrameIndex:                 return "FrameIndex";
     94   case ISD::JumpTable:                  return "JumpTable";
     95   case ISD::GLOBAL_OFFSET_TABLE:        return "GLOBAL_OFFSET_TABLE";
     96   case ISD::RETURNADDR:                 return "RETURNADDR";
     97   case ISD::FRAMEADDR:                  return "FRAMEADDR";
     98   case ISD::FRAME_ALLOC_RECOVER:        return "FRAME_ALLOC_RECOVER";
     99   case ISD::READ_REGISTER:              return "READ_REGISTER";
    100   case ISD::WRITE_REGISTER:             return "WRITE_REGISTER";
    101   case ISD::FRAME_TO_ARGS_OFFSET:       return "FRAME_TO_ARGS_OFFSET";
    102   case ISD::EH_RETURN:                  return "EH_RETURN";
    103   case ISD::EH_SJLJ_SETJMP:             return "EH_SJLJ_SETJMP";
    104   case ISD::EH_SJLJ_LONGJMP:            return "EH_SJLJ_LONGJMP";
    105   case ISD::ConstantPool:               return "ConstantPool";
    106   case ISD::TargetIndex:                return "TargetIndex";
    107   case ISD::ExternalSymbol:             return "ExternalSymbol";
    108   case ISD::BlockAddress:               return "BlockAddress";
    109   case ISD::INTRINSIC_WO_CHAIN:
    110   case ISD::INTRINSIC_VOID:
    111   case ISD::INTRINSIC_W_CHAIN: {
    112     unsigned OpNo = getOpcode() == ISD::INTRINSIC_WO_CHAIN ? 0 : 1;
    113     unsigned IID = cast<ConstantSDNode>(getOperand(OpNo))->getZExtValue();
    114     if (IID < Intrinsic::num_intrinsics)
    115       return Intrinsic::getName((Intrinsic::ID)IID);
    116     else if (const TargetIntrinsicInfo *TII = G->getTarget().getIntrinsicInfo())
    117       return TII->getName(IID);
    118     llvm_unreachable("Invalid intrinsic ID");
    119   }
    120 
    121   case ISD::BUILD_VECTOR:               return "BUILD_VECTOR";
    122   case ISD::TargetConstant:
    123     if (cast<ConstantSDNode>(this)->isOpaque())
    124       return "OpaqueTargetConstant";
    125     return "TargetConstant";
    126   case ISD::TargetConstantFP:           return "TargetConstantFP";
    127   case ISD::TargetGlobalAddress:        return "TargetGlobalAddress";
    128   case ISD::TargetGlobalTLSAddress:     return "TargetGlobalTLSAddress";
    129   case ISD::TargetFrameIndex:           return "TargetFrameIndex";
    130   case ISD::TargetJumpTable:            return "TargetJumpTable";
    131   case ISD::TargetConstantPool:         return "TargetConstantPool";
    132   case ISD::TargetExternalSymbol:       return "TargetExternalSymbol";
    133   case ISD::TargetBlockAddress:         return "TargetBlockAddress";
    134 
    135   case ISD::CopyToReg:                  return "CopyToReg";
    136   case ISD::CopyFromReg:                return "CopyFromReg";
    137   case ISD::UNDEF:                      return "undef";
    138   case ISD::MERGE_VALUES:               return "merge_values";
    139   case ISD::INLINEASM:                  return "inlineasm";
    140   case ISD::EH_LABEL:                   return "eh_label";
    141   case ISD::HANDLENODE:                 return "handlenode";
    142 
    143   // Unary operators
    144   case ISD::FABS:                       return "fabs";
    145   case ISD::FMINNUM:                    return "fminnum";
    146   case ISD::FMAXNUM:                    return "fmaxnum";
    147   case ISD::FNEG:                       return "fneg";
    148   case ISD::FSQRT:                      return "fsqrt";
    149   case ISD::FSIN:                       return "fsin";
    150   case ISD::FCOS:                       return "fcos";
    151   case ISD::FSINCOS:                    return "fsincos";
    152   case ISD::FTRUNC:                     return "ftrunc";
    153   case ISD::FFLOOR:                     return "ffloor";
    154   case ISD::FCEIL:                      return "fceil";
    155   case ISD::FRINT:                      return "frint";
    156   case ISD::FNEARBYINT:                 return "fnearbyint";
    157   case ISD::FROUND:                     return "fround";
    158   case ISD::FEXP:                       return "fexp";
    159   case ISD::FEXP2:                      return "fexp2";
    160   case ISD::FLOG:                       return "flog";
    161   case ISD::FLOG2:                      return "flog2";
    162   case ISD::FLOG10:                     return "flog10";
    163 
    164   // Binary operators
    165   case ISD::ADD:                        return "add";
    166   case ISD::SUB:                        return "sub";
    167   case ISD::MUL:                        return "mul";
    168   case ISD::MULHU:                      return "mulhu";
    169   case ISD::MULHS:                      return "mulhs";
    170   case ISD::SDIV:                       return "sdiv";
    171   case ISD::UDIV:                       return "udiv";
    172   case ISD::SREM:                       return "srem";
    173   case ISD::UREM:                       return "urem";
    174   case ISD::SMUL_LOHI:                  return "smul_lohi";
    175   case ISD::UMUL_LOHI:                  return "umul_lohi";
    176   case ISD::SDIVREM:                    return "sdivrem";
    177   case ISD::UDIVREM:                    return "udivrem";
    178   case ISD::AND:                        return "and";
    179   case ISD::OR:                         return "or";
    180   case ISD::XOR:                        return "xor";
    181   case ISD::SHL:                        return "shl";
    182   case ISD::SRA:                        return "sra";
    183   case ISD::SRL:                        return "srl";
    184   case ISD::ROTL:                       return "rotl";
    185   case ISD::ROTR:                       return "rotr";
    186   case ISD::FADD:                       return "fadd";
    187   case ISD::FSUB:                       return "fsub";
    188   case ISD::FMUL:                       return "fmul";
    189   case ISD::FDIV:                       return "fdiv";
    190   case ISD::FMA:                        return "fma";
    191   case ISD::FMAD:                       return "fmad";
    192   case ISD::FREM:                       return "frem";
    193   case ISD::FCOPYSIGN:                  return "fcopysign";
    194   case ISD::FGETSIGN:                   return "fgetsign";
    195   case ISD::FPOW:                       return "fpow";
    196 
    197   case ISD::FPOWI:                      return "fpowi";
    198   case ISD::SETCC:                      return "setcc";
    199   case ISD::SELECT:                     return "select";
    200   case ISD::VSELECT:                    return "vselect";
    201   case ISD::SELECT_CC:                  return "select_cc";
    202   case ISD::INSERT_VECTOR_ELT:          return "insert_vector_elt";
    203   case ISD::EXTRACT_VECTOR_ELT:         return "extract_vector_elt";
    204   case ISD::CONCAT_VECTORS:             return "concat_vectors";
    205   case ISD::INSERT_SUBVECTOR:           return "insert_subvector";
    206   case ISD::EXTRACT_SUBVECTOR:          return "extract_subvector";
    207   case ISD::SCALAR_TO_VECTOR:           return "scalar_to_vector";
    208   case ISD::VECTOR_SHUFFLE:             return "vector_shuffle";
    209   case ISD::CARRY_FALSE:                return "carry_false";
    210   case ISD::ADDC:                       return "addc";
    211   case ISD::ADDE:                       return "adde";
    212   case ISD::SADDO:                      return "saddo";
    213   case ISD::UADDO:                      return "uaddo";
    214   case ISD::SSUBO:                      return "ssubo";
    215   case ISD::USUBO:                      return "usubo";
    216   case ISD::SMULO:                      return "smulo";
    217   case ISD::UMULO:                      return "umulo";
    218   case ISD::SUBC:                       return "subc";
    219   case ISD::SUBE:                       return "sube";
    220   case ISD::SHL_PARTS:                  return "shl_parts";
    221   case ISD::SRA_PARTS:                  return "sra_parts";
    222   case ISD::SRL_PARTS:                  return "srl_parts";
    223 
    224   // Conversion operators.
    225   case ISD::SIGN_EXTEND:                return "sign_extend";
    226   case ISD::ZERO_EXTEND:                return "zero_extend";
    227   case ISD::ANY_EXTEND:                 return "any_extend";
    228   case ISD::SIGN_EXTEND_INREG:          return "sign_extend_inreg";
    229   case ISD::ANY_EXTEND_VECTOR_INREG:    return "any_extend_vector_inreg";
    230   case ISD::SIGN_EXTEND_VECTOR_INREG:   return "sign_extend_vector_inreg";
    231   case ISD::ZERO_EXTEND_VECTOR_INREG:   return "zero_extend_vector_inreg";
    232   case ISD::TRUNCATE:                   return "truncate";
    233   case ISD::FP_ROUND:                   return "fp_round";
    234   case ISD::FLT_ROUNDS_:                return "flt_rounds";
    235   case ISD::FP_ROUND_INREG:             return "fp_round_inreg";
    236   case ISD::FP_EXTEND:                  return "fp_extend";
    237 
    238   case ISD::SINT_TO_FP:                 return "sint_to_fp";
    239   case ISD::UINT_TO_FP:                 return "uint_to_fp";
    240   case ISD::FP_TO_SINT:                 return "fp_to_sint";
    241   case ISD::FP_TO_UINT:                 return "fp_to_uint";
    242   case ISD::BITCAST:                    return "bitcast";
    243   case ISD::ADDRSPACECAST:              return "addrspacecast";
    244   case ISD::FP16_TO_FP:                 return "fp16_to_fp";
    245   case ISD::FP_TO_FP16:                 return "fp_to_fp16";
    246 
    247   case ISD::CONVERT_RNDSAT: {
    248     switch (cast<CvtRndSatSDNode>(this)->getCvtCode()) {
    249     default: llvm_unreachable("Unknown cvt code!");
    250     case ISD::CVT_FF:                   return "cvt_ff";
    251     case ISD::CVT_FS:                   return "cvt_fs";
    252     case ISD::CVT_FU:                   return "cvt_fu";
    253     case ISD::CVT_SF:                   return "cvt_sf";
    254     case ISD::CVT_UF:                   return "cvt_uf";
    255     case ISD::CVT_SS:                   return "cvt_ss";
    256     case ISD::CVT_SU:                   return "cvt_su";
    257     case ISD::CVT_US:                   return "cvt_us";
    258     case ISD::CVT_UU:                   return "cvt_uu";
    259     }
    260   }
    261 
    262     // Control flow instructions
    263   case ISD::BR:                         return "br";
    264   case ISD::BRIND:                      return "brind";
    265   case ISD::BR_JT:                      return "br_jt";
    266   case ISD::BRCOND:                     return "brcond";
    267   case ISD::BR_CC:                      return "br_cc";
    268   case ISD::CALLSEQ_START:              return "callseq_start";
    269   case ISD::CALLSEQ_END:                return "callseq_end";
    270 
    271     // Other operators
    272   case ISD::LOAD:                       return "load";
    273   case ISD::STORE:                      return "store";
    274   case ISD::MLOAD:                      return "masked_load";
    275   case ISD::MSTORE:                     return "masked_store";
    276   case ISD::VAARG:                      return "vaarg";
    277   case ISD::VACOPY:                     return "vacopy";
    278   case ISD::VAEND:                      return "vaend";
    279   case ISD::VASTART:                    return "vastart";
    280   case ISD::DYNAMIC_STACKALLOC:         return "dynamic_stackalloc";
    281   case ISD::EXTRACT_ELEMENT:            return "extract_element";
    282   case ISD::BUILD_PAIR:                 return "build_pair";
    283   case ISD::STACKSAVE:                  return "stacksave";
    284   case ISD::STACKRESTORE:               return "stackrestore";
    285   case ISD::TRAP:                       return "trap";
    286   case ISD::DEBUGTRAP:                  return "debugtrap";
    287   case ISD::LIFETIME_START:             return "lifetime.start";
    288   case ISD::LIFETIME_END:               return "lifetime.end";
    289 
    290   // Bit manipulation
    291   case ISD::BSWAP:                      return "bswap";
    292   case ISD::CTPOP:                      return "ctpop";
    293   case ISD::CTTZ:                       return "cttz";
    294   case ISD::CTTZ_ZERO_UNDEF:            return "cttz_zero_undef";
    295   case ISD::CTLZ:                       return "ctlz";
    296   case ISD::CTLZ_ZERO_UNDEF:            return "ctlz_zero_undef";
    297 
    298   // Trampolines
    299   case ISD::INIT_TRAMPOLINE:            return "init_trampoline";
    300   case ISD::ADJUST_TRAMPOLINE:          return "adjust_trampoline";
    301 
    302   case ISD::CONDCODE:
    303     switch (cast<CondCodeSDNode>(this)->get()) {
    304     default: llvm_unreachable("Unknown setcc condition!");
    305     case ISD::SETOEQ:                   return "setoeq";
    306     case ISD::SETOGT:                   return "setogt";
    307     case ISD::SETOGE:                   return "setoge";
    308     case ISD::SETOLT:                   return "setolt";
    309     case ISD::SETOLE:                   return "setole";
    310     case ISD::SETONE:                   return "setone";
    311 
    312     case ISD::SETO:                     return "seto";
    313     case ISD::SETUO:                    return "setuo";
    314     case ISD::SETUEQ:                   return "setue";
    315     case ISD::SETUGT:                   return "setugt";
    316     case ISD::SETUGE:                   return "setuge";
    317     case ISD::SETULT:                   return "setult";
    318     case ISD::SETULE:                   return "setule";
    319     case ISD::SETUNE:                   return "setune";
    320 
    321     case ISD::SETEQ:                    return "seteq";
    322     case ISD::SETGT:                    return "setgt";
    323     case ISD::SETGE:                    return "setge";
    324     case ISD::SETLT:                    return "setlt";
    325     case ISD::SETLE:                    return "setle";
    326     case ISD::SETNE:                    return "setne";
    327 
    328     case ISD::SETTRUE:                  return "settrue";
    329     case ISD::SETTRUE2:                 return "settrue2";
    330     case ISD::SETFALSE:                 return "setfalse";
    331     case ISD::SETFALSE2:                return "setfalse2";
    332     }
    333   }
    334 }
    335 
    336 const char *SDNode::getIndexedModeName(ISD::MemIndexedMode AM) {
    337   switch (AM) {
    338   default:              return "";
    339   case ISD::PRE_INC:    return "<pre-inc>";
    340   case ISD::PRE_DEC:    return "<pre-dec>";
    341   case ISD::POST_INC:   return "<post-inc>";
    342   case ISD::POST_DEC:   return "<post-dec>";
    343   }
    344 }
    345 
    346 void SDNode::dump() const { dump(nullptr); }
    347 void SDNode::dump(const SelectionDAG *G) const {
    348   print(dbgs(), G);
    349   dbgs() << '\n';
    350 }
    351 
    352 void SDNode::print_types(raw_ostream &OS, const SelectionDAG *G) const {
    353   OS << (const void*)this << ": ";
    354 
    355   for (unsigned i = 0, e = getNumValues(); i != e; ++i) {
    356     if (i) OS << ",";
    357     if (getValueType(i) == MVT::Other)
    358       OS << "ch";
    359     else
    360       OS << getValueType(i).getEVTString();
    361   }
    362   OS << " = " << getOperationName(G);
    363 }
    364 
    365 void SDNode::print_details(raw_ostream &OS, const SelectionDAG *G) const {
    366   if (const MachineSDNode *MN = dyn_cast<MachineSDNode>(this)) {
    367     if (!MN->memoperands_empty()) {
    368       OS << "<";
    369       OS << "Mem:";
    370       for (MachineSDNode::mmo_iterator i = MN->memoperands_begin(),
    371            e = MN->memoperands_end(); i != e; ++i) {
    372         OS << **i;
    373         if (std::next(i) != e)
    374           OS << " ";
    375       }
    376       OS << ">";
    377     }
    378   } else if (const ShuffleVectorSDNode *SVN =
    379                dyn_cast<ShuffleVectorSDNode>(this)) {
    380     OS << "<";
    381     for (unsigned i = 0, e = ValueList[0].getVectorNumElements(); i != e; ++i) {
    382       int Idx = SVN->getMaskElt(i);
    383       if (i) OS << ",";
    384       if (Idx < 0)
    385         OS << "u";
    386       else
    387         OS << Idx;
    388     }
    389     OS << ">";
    390   } else if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) {
    391     OS << '<' << CSDN->getAPIntValue() << '>';
    392   } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) {
    393     if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEsingle)
    394       OS << '<' << CSDN->getValueAPF().convertToFloat() << '>';
    395     else if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEdouble)
    396       OS << '<' << CSDN->getValueAPF().convertToDouble() << '>';
    397     else {
    398       OS << "<APFloat(";
    399       CSDN->getValueAPF().bitcastToAPInt().dump();
    400       OS << ")>";
    401     }
    402   } else if (const GlobalAddressSDNode *GADN =
    403              dyn_cast<GlobalAddressSDNode>(this)) {
    404     int64_t offset = GADN->getOffset();
    405     OS << '<';
    406     GADN->getGlobal()->printAsOperand(OS);
    407     OS << '>';
    408     if (offset > 0)
    409       OS << " + " << offset;
    410     else
    411       OS << " " << offset;
    412     if (unsigned int TF = GADN->getTargetFlags())
    413       OS << " [TF=" << TF << ']';
    414   } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) {
    415     OS << "<" << FIDN->getIndex() << ">";
    416   } else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(this)) {
    417     OS << "<" << JTDN->getIndex() << ">";
    418     if (unsigned int TF = JTDN->getTargetFlags())
    419       OS << " [TF=" << TF << ']';
    420   } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){
    421     int offset = CP->getOffset();
    422     if (CP->isMachineConstantPoolEntry())
    423       OS << "<" << *CP->getMachineCPVal() << ">";
    424     else
    425       OS << "<" << *CP->getConstVal() << ">";
    426     if (offset > 0)
    427       OS << " + " << offset;
    428     else
    429       OS << " " << offset;
    430     if (unsigned int TF = CP->getTargetFlags())
    431       OS << " [TF=" << TF << ']';
    432   } else if (const TargetIndexSDNode *TI = dyn_cast<TargetIndexSDNode>(this)) {
    433     OS << "<" << TI->getIndex() << '+' << TI->getOffset() << ">";
    434     if (unsigned TF = TI->getTargetFlags())
    435       OS << " [TF=" << TF << ']';
    436   } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) {
    437     OS << "<";
    438     const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
    439     if (LBB)
    440       OS << LBB->getName() << " ";
    441     OS << (const void*)BBDN->getBasicBlock() << ">";
    442   } else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) {
    443     OS << ' ' << PrintReg(R->getReg(),
    444                           G ? G->getSubtarget().getRegisterInfo() : nullptr);
    445   } else if (const ExternalSymbolSDNode *ES =
    446              dyn_cast<ExternalSymbolSDNode>(this)) {
    447     OS << "'" << ES->getSymbol() << "'";
    448     if (unsigned int TF = ES->getTargetFlags())
    449       OS << " [TF=" << TF << ']';
    450   } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) {
    451     if (M->getValue())
    452       OS << "<" << M->getValue() << ">";
    453     else
    454       OS << "<null>";
    455   } else if (const MDNodeSDNode *MD = dyn_cast<MDNodeSDNode>(this)) {
    456     if (MD->getMD())
    457       OS << "<" << MD->getMD() << ">";
    458     else
    459       OS << "<null>";
    460   } else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) {
    461     OS << ":" << N->getVT().getEVTString();
    462   }
    463   else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(this)) {
    464     OS << "<" << *LD->getMemOperand();
    465 
    466     bool doExt = true;
    467     switch (LD->getExtensionType()) {
    468     default: doExt = false; break;
    469     case ISD::EXTLOAD:  OS << ", anyext"; break;
    470     case ISD::SEXTLOAD: OS << ", sext"; break;
    471     case ISD::ZEXTLOAD: OS << ", zext"; break;
    472     }
    473     if (doExt)
    474       OS << " from " << LD->getMemoryVT().getEVTString();
    475 
    476     const char *AM = getIndexedModeName(LD->getAddressingMode());
    477     if (*AM)
    478       OS << ", " << AM;
    479 
    480     OS << ">";
    481   } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(this)) {
    482     OS << "<" << *ST->getMemOperand();
    483 
    484     if (ST->isTruncatingStore())
    485       OS << ", trunc to " << ST->getMemoryVT().getEVTString();
    486 
    487     const char *AM = getIndexedModeName(ST->getAddressingMode());
    488     if (*AM)
    489       OS << ", " << AM;
    490 
    491     OS << ">";
    492   } else if (const MemSDNode* M = dyn_cast<MemSDNode>(this)) {
    493     OS << "<" << *M->getMemOperand() << ">";
    494   } else if (const BlockAddressSDNode *BA =
    495                dyn_cast<BlockAddressSDNode>(this)) {
    496     int64_t offset = BA->getOffset();
    497     OS << "<";
    498     BA->getBlockAddress()->getFunction()->printAsOperand(OS, false);
    499     OS << ", ";
    500     BA->getBlockAddress()->getBasicBlock()->printAsOperand(OS, false);
    501     OS << ">";
    502     if (offset > 0)
    503       OS << " + " << offset;
    504     else
    505       OS << " " << offset;
    506     if (unsigned int TF = BA->getTargetFlags())
    507       OS << " [TF=" << TF << ']';
    508   } else if (const AddrSpaceCastSDNode *ASC =
    509                dyn_cast<AddrSpaceCastSDNode>(this)) {
    510     OS << '['
    511        << ASC->getSrcAddressSpace()
    512        << " -> "
    513        << ASC->getDestAddressSpace()
    514        << ']';
    515   }
    516 
    517   if (unsigned Order = getIROrder())
    518       OS << " [ORD=" << Order << ']';
    519 
    520   if (getNodeId() != -1)
    521     OS << " [ID=" << getNodeId() << ']';
    522 
    523   if (!G)
    524     return;
    525 
    526   MDLocation *L = getDebugLoc();
    527   if (!L)
    528     return;
    529 
    530   if (auto *Scope = L->getScope())
    531     OS << Scope->getFilename();
    532   else
    533     OS << "<unknown>";
    534   OS << ':' << L->getLine();
    535   if (unsigned C = L->getColumn())
    536     OS << ':' << C;
    537 }
    538 
    539 static void DumpNodes(const SDNode *N, unsigned indent, const SelectionDAG *G) {
    540   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
    541     if (N->getOperand(i).getNode()->hasOneUse())
    542       DumpNodes(N->getOperand(i).getNode(), indent+2, G);
    543     else
    544       dbgs() << "\n" << std::string(indent+2, ' ')
    545              << (void*)N->getOperand(i).getNode() << ": <multiple use>";
    546 
    547   dbgs() << '\n';
    548   dbgs().indent(indent);
    549   N->dump(G);
    550 }
    551 
    552 void SelectionDAG::dump() const {
    553   dbgs() << "SelectionDAG has " << AllNodes.size() << " nodes:";
    554 
    555   for (allnodes_const_iterator I = allnodes_begin(), E = allnodes_end();
    556        I != E; ++I) {
    557     const SDNode *N = I;
    558     if (!N->hasOneUse() && N != getRoot().getNode())
    559       DumpNodes(N, 2, this);
    560   }
    561 
    562   if (getRoot().getNode()) DumpNodes(getRoot().getNode(), 2, this);
    563   dbgs() << "\n\n";
    564 }
    565 
    566 void SDNode::printr(raw_ostream &OS, const SelectionDAG *G) const {
    567   print_types(OS, G);
    568   print_details(OS, G);
    569 }
    570 
    571 typedef SmallPtrSet<const SDNode *, 128> VisitedSDNodeSet;
    572 static void DumpNodesr(raw_ostream &OS, const SDNode *N, unsigned indent,
    573                        const SelectionDAG *G, VisitedSDNodeSet &once) {
    574   if (!once.insert(N).second) // If we've been here before, return now.
    575     return;
    576 
    577   // Dump the current SDNode, but don't end the line yet.
    578   OS.indent(indent);
    579   N->printr(OS, G);
    580 
    581   // Having printed this SDNode, walk the children:
    582   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    583     const SDNode *child = N->getOperand(i).getNode();
    584 
    585     if (i) OS << ",";
    586     OS << " ";
    587 
    588     if (child->getNumOperands() == 0) {
    589       // This child has no grandchildren; print it inline right here.
    590       child->printr(OS, G);
    591       once.insert(child);
    592     } else {         // Just the address. FIXME: also print the child's opcode.
    593       OS << (const void*)child;
    594       if (unsigned RN = N->getOperand(i).getResNo())
    595         OS << ":" << RN;
    596     }
    597   }
    598 
    599   OS << "\n";
    600 
    601   // Dump children that have grandchildren on their own line(s).
    602   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    603     const SDNode *child = N->getOperand(i).getNode();
    604     DumpNodesr(OS, child, indent+2, G, once);
    605   }
    606 }
    607 
    608 void SDNode::dumpr() const {
    609   VisitedSDNodeSet once;
    610   DumpNodesr(dbgs(), this, 0, nullptr, once);
    611 }
    612 
    613 void SDNode::dumpr(const SelectionDAG *G) const {
    614   VisitedSDNodeSet once;
    615   DumpNodesr(dbgs(), this, 0, G, once);
    616 }
    617 
    618 static void printrWithDepthHelper(raw_ostream &OS, const SDNode *N,
    619                                   const SelectionDAG *G, unsigned depth,
    620                                   unsigned indent) {
    621   if (depth == 0)
    622     return;
    623 
    624   OS.indent(indent);
    625 
    626   N->print(OS, G);
    627 
    628   if (depth < 1)
    629     return;
    630 
    631   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    632     // Don't follow chain operands.
    633     if (N->getOperand(i).getValueType() == MVT::Other)
    634       continue;
    635     OS << '\n';
    636     printrWithDepthHelper(OS, N->getOperand(i).getNode(), G, depth-1, indent+2);
    637   }
    638 }
    639 
    640 void SDNode::printrWithDepth(raw_ostream &OS, const SelectionDAG *G,
    641                             unsigned depth) const {
    642   printrWithDepthHelper(OS, this, G, depth, 0);
    643 }
    644 
    645 void SDNode::printrFull(raw_ostream &OS, const SelectionDAG *G) const {
    646   // Don't print impossibly deep things.
    647   printrWithDepth(OS, G, 10);
    648 }
    649 
    650 void SDNode::dumprWithDepth(const SelectionDAG *G, unsigned depth) const {
    651   printrWithDepth(dbgs(), G, depth);
    652 }
    653 
    654 void SDNode::dumprFull(const SelectionDAG *G) const {
    655   // Don't print impossibly deep things.
    656   dumprWithDepth(G, 10);
    657 }
    658 
    659 void SDNode::print(raw_ostream &OS, const SelectionDAG *G) const {
    660   print_types(OS, G);
    661   for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
    662     if (i) OS << ", "; else OS << " ";
    663     OS << (void*)getOperand(i).getNode();
    664     if (unsigned RN = getOperand(i).getResNo())
    665       OS << ":" << RN;
    666   }
    667   print_details(OS, G);
    668 }
    669