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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/Assembly/Writer.h"
     18 #include "llvm/CodeGen/MachineConstantPool.h"
     19 #include "llvm/CodeGen/MachineFunction.h"
     20 #include "llvm/CodeGen/MachineModuleInfo.h"
     21 #include "llvm/DebugInfo.h"
     22 #include "llvm/IR/Function.h"
     23 #include "llvm/IR/Intrinsics.h"
     24 #include "llvm/Support/Debug.h"
     25 #include "llvm/Support/GraphWriter.h"
     26 #include "llvm/Support/raw_ostream.h"
     27 #include "llvm/Target/TargetInstrInfo.h"
     28 #include "llvm/Target/TargetIntrinsicInfo.h"
     29 #include "llvm/Target/TargetMachine.h"
     30 #include "llvm/Target/TargetRegisterInfo.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->getTarget().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::MEMBARRIER:                 return "MemBarrier";
     58   case ISD::ATOMIC_FENCE:               return "AtomicFence";
     59   case ISD::ATOMIC_CMP_SWAP:            return "AtomicCmpSwap";
     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:                   return "Constant";
     87   case ISD::ConstantFP:                 return "ConstantFP";
     88   case ISD::GlobalAddress:              return "GlobalAddress";
     89   case ISD::GlobalTLSAddress:           return "GlobalTLSAddress";
     90   case ISD::FrameIndex:                 return "FrameIndex";
     91   case ISD::JumpTable:                  return "JumpTable";
     92   case ISD::GLOBAL_OFFSET_TABLE:        return "GLOBAL_OFFSET_TABLE";
     93   case ISD::RETURNADDR:                 return "RETURNADDR";
     94   case ISD::FRAMEADDR:                  return "FRAMEADDR";
     95   case ISD::FRAME_TO_ARGS_OFFSET:       return "FRAME_TO_ARGS_OFFSET";
     96   case ISD::EXCEPTIONADDR:              return "EXCEPTIONADDR";
     97   case ISD::LSDAADDR:                   return "LSDAADDR";
     98   case ISD::EHSELECTION:                return "EHSELECTION";
     99   case ISD::EH_RETURN:                  return "EH_RETURN";
    100   case ISD::EH_SJLJ_SETJMP:             return "EH_SJLJ_SETJMP";
    101   case ISD::EH_SJLJ_LONGJMP:            return "EH_SJLJ_LONGJMP";
    102   case ISD::ConstantPool:               return "ConstantPool";
    103   case ISD::TargetIndex:                return "TargetIndex";
    104   case ISD::ExternalSymbol:             return "ExternalSymbol";
    105   case ISD::BlockAddress:               return "BlockAddress";
    106   case ISD::INTRINSIC_WO_CHAIN:
    107   case ISD::INTRINSIC_VOID:
    108   case ISD::INTRINSIC_W_CHAIN: {
    109     unsigned OpNo = getOpcode() == ISD::INTRINSIC_WO_CHAIN ? 0 : 1;
    110     unsigned IID = cast<ConstantSDNode>(getOperand(OpNo))->getZExtValue();
    111     if (IID < Intrinsic::num_intrinsics)
    112       return Intrinsic::getName((Intrinsic::ID)IID);
    113     else if (const TargetIntrinsicInfo *TII = G->getTarget().getIntrinsicInfo())
    114       return TII->getName(IID);
    115     llvm_unreachable("Invalid intrinsic ID");
    116   }
    117 
    118   case ISD::BUILD_VECTOR:               return "BUILD_VECTOR";
    119   case ISD::TargetConstant:             return "TargetConstant";
    120   case ISD::TargetConstantFP:           return "TargetConstantFP";
    121   case ISD::TargetGlobalAddress:        return "TargetGlobalAddress";
    122   case ISD::TargetGlobalTLSAddress:     return "TargetGlobalTLSAddress";
    123   case ISD::TargetFrameIndex:           return "TargetFrameIndex";
    124   case ISD::TargetJumpTable:            return "TargetJumpTable";
    125   case ISD::TargetConstantPool:         return "TargetConstantPool";
    126   case ISD::TargetExternalSymbol:       return "TargetExternalSymbol";
    127   case ISD::TargetBlockAddress:         return "TargetBlockAddress";
    128 
    129   case ISD::CopyToReg:                  return "CopyToReg";
    130   case ISD::CopyFromReg:                return "CopyFromReg";
    131   case ISD::UNDEF:                      return "undef";
    132   case ISD::MERGE_VALUES:               return "merge_values";
    133   case ISD::INLINEASM:                  return "inlineasm";
    134   case ISD::EH_LABEL:                   return "eh_label";
    135   case ISD::HANDLENODE:                 return "handlenode";
    136 
    137   // Unary operators
    138   case ISD::FABS:                       return "fabs";
    139   case ISD::FNEG:                       return "fneg";
    140   case ISD::FSQRT:                      return "fsqrt";
    141   case ISD::FSIN:                       return "fsin";
    142   case ISD::FCOS:                       return "fcos";
    143   case ISD::FSINCOS:                    return "fsincos";
    144   case ISD::FTRUNC:                     return "ftrunc";
    145   case ISD::FFLOOR:                     return "ffloor";
    146   case ISD::FCEIL:                      return "fceil";
    147   case ISD::FRINT:                      return "frint";
    148   case ISD::FNEARBYINT:                 return "fnearbyint";
    149   case ISD::FEXP:                       return "fexp";
    150   case ISD::FEXP2:                      return "fexp2";
    151   case ISD::FLOG:                       return "flog";
    152   case ISD::FLOG2:                      return "flog2";
    153   case ISD::FLOG10:                     return "flog10";
    154 
    155   // Binary operators
    156   case ISD::ADD:                        return "add";
    157   case ISD::SUB:                        return "sub";
    158   case ISD::MUL:                        return "mul";
    159   case ISD::MULHU:                      return "mulhu";
    160   case ISD::MULHS:                      return "mulhs";
    161   case ISD::SDIV:                       return "sdiv";
    162   case ISD::UDIV:                       return "udiv";
    163   case ISD::SREM:                       return "srem";
    164   case ISD::UREM:                       return "urem";
    165   case ISD::SMUL_LOHI:                  return "smul_lohi";
    166   case ISD::UMUL_LOHI:                  return "umul_lohi";
    167   case ISD::SDIVREM:                    return "sdivrem";
    168   case ISD::UDIVREM:                    return "udivrem";
    169   case ISD::AND:                        return "and";
    170   case ISD::OR:                         return "or";
    171   case ISD::XOR:                        return "xor";
    172   case ISD::SHL:                        return "shl";
    173   case ISD::SRA:                        return "sra";
    174   case ISD::SRL:                        return "srl";
    175   case ISD::ROTL:                       return "rotl";
    176   case ISD::ROTR:                       return "rotr";
    177   case ISD::FADD:                       return "fadd";
    178   case ISD::FSUB:                       return "fsub";
    179   case ISD::FMUL:                       return "fmul";
    180   case ISD::FDIV:                       return "fdiv";
    181   case ISD::FMA:                        return "fma";
    182   case ISD::FREM:                       return "frem";
    183   case ISD::FCOPYSIGN:                  return "fcopysign";
    184   case ISD::FGETSIGN:                   return "fgetsign";
    185   case ISD::FPOW:                       return "fpow";
    186 
    187   case ISD::FPOWI:                      return "fpowi";
    188   case ISD::SETCC:                      return "setcc";
    189   case ISD::SELECT:                     return "select";
    190   case ISD::VSELECT:                    return "vselect";
    191   case ISD::SELECT_CC:                  return "select_cc";
    192   case ISD::INSERT_VECTOR_ELT:          return "insert_vector_elt";
    193   case ISD::EXTRACT_VECTOR_ELT:         return "extract_vector_elt";
    194   case ISD::CONCAT_VECTORS:             return "concat_vectors";
    195   case ISD::INSERT_SUBVECTOR:           return "insert_subvector";
    196   case ISD::EXTRACT_SUBVECTOR:          return "extract_subvector";
    197   case ISD::SCALAR_TO_VECTOR:           return "scalar_to_vector";
    198   case ISD::VECTOR_SHUFFLE:             return "vector_shuffle";
    199   case ISD::CARRY_FALSE:                return "carry_false";
    200   case ISD::ADDC:                       return "addc";
    201   case ISD::ADDE:                       return "adde";
    202   case ISD::SADDO:                      return "saddo";
    203   case ISD::UADDO:                      return "uaddo";
    204   case ISD::SSUBO:                      return "ssubo";
    205   case ISD::USUBO:                      return "usubo";
    206   case ISD::SMULO:                      return "smulo";
    207   case ISD::UMULO:                      return "umulo";
    208   case ISD::SUBC:                       return "subc";
    209   case ISD::SUBE:                       return "sube";
    210   case ISD::SHL_PARTS:                  return "shl_parts";
    211   case ISD::SRA_PARTS:                  return "sra_parts";
    212   case ISD::SRL_PARTS:                  return "srl_parts";
    213 
    214   // Conversion operators.
    215   case ISD::SIGN_EXTEND:                return "sign_extend";
    216   case ISD::ZERO_EXTEND:                return "zero_extend";
    217   case ISD::ANY_EXTEND:                 return "any_extend";
    218   case ISD::SIGN_EXTEND_INREG:          return "sign_extend_inreg";
    219   case ISD::TRUNCATE:                   return "truncate";
    220   case ISD::FP_ROUND:                   return "fp_round";
    221   case ISD::FLT_ROUNDS_:                return "flt_rounds";
    222   case ISD::FP_ROUND_INREG:             return "fp_round_inreg";
    223   case ISD::FP_EXTEND:                  return "fp_extend";
    224 
    225   case ISD::SINT_TO_FP:                 return "sint_to_fp";
    226   case ISD::UINT_TO_FP:                 return "uint_to_fp";
    227   case ISD::FP_TO_SINT:                 return "fp_to_sint";
    228   case ISD::FP_TO_UINT:                 return "fp_to_uint";
    229   case ISD::BITCAST:                    return "bitcast";
    230   case ISD::FP16_TO_FP32:               return "fp16_to_fp32";
    231   case ISD::FP32_TO_FP16:               return "fp32_to_fp16";
    232 
    233   case ISD::CONVERT_RNDSAT: {
    234     switch (cast<CvtRndSatSDNode>(this)->getCvtCode()) {
    235     default: llvm_unreachable("Unknown cvt code!");
    236     case ISD::CVT_FF:                   return "cvt_ff";
    237     case ISD::CVT_FS:                   return "cvt_fs";
    238     case ISD::CVT_FU:                   return "cvt_fu";
    239     case ISD::CVT_SF:                   return "cvt_sf";
    240     case ISD::CVT_UF:                   return "cvt_uf";
    241     case ISD::CVT_SS:                   return "cvt_ss";
    242     case ISD::CVT_SU:                   return "cvt_su";
    243     case ISD::CVT_US:                   return "cvt_us";
    244     case ISD::CVT_UU:                   return "cvt_uu";
    245     }
    246   }
    247 
    248     // Control flow instructions
    249   case ISD::BR:                         return "br";
    250   case ISD::BRIND:                      return "brind";
    251   case ISD::BR_JT:                      return "br_jt";
    252   case ISD::BRCOND:                     return "brcond";
    253   case ISD::BR_CC:                      return "br_cc";
    254   case ISD::CALLSEQ_START:              return "callseq_start";
    255   case ISD::CALLSEQ_END:                return "callseq_end";
    256 
    257     // Other operators
    258   case ISD::LOAD:                       return "load";
    259   case ISD::STORE:                      return "store";
    260   case ISD::VAARG:                      return "vaarg";
    261   case ISD::VACOPY:                     return "vacopy";
    262   case ISD::VAEND:                      return "vaend";
    263   case ISD::VASTART:                    return "vastart";
    264   case ISD::DYNAMIC_STACKALLOC:         return "dynamic_stackalloc";
    265   case ISD::EXTRACT_ELEMENT:            return "extract_element";
    266   case ISD::BUILD_PAIR:                 return "build_pair";
    267   case ISD::STACKSAVE:                  return "stacksave";
    268   case ISD::STACKRESTORE:               return "stackrestore";
    269   case ISD::TRAP:                       return "trap";
    270   case ISD::DEBUGTRAP:                  return "debugtrap";
    271   case ISD::LIFETIME_START:             return "lifetime.start";
    272   case ISD::LIFETIME_END:               return "lifetime.end";
    273 
    274   // Bit manipulation
    275   case ISD::BSWAP:                      return "bswap";
    276   case ISD::CTPOP:                      return "ctpop";
    277   case ISD::CTTZ:                       return "cttz";
    278   case ISD::CTTZ_ZERO_UNDEF:            return "cttz_zero_undef";
    279   case ISD::CTLZ:                       return "ctlz";
    280   case ISD::CTLZ_ZERO_UNDEF:            return "ctlz_zero_undef";
    281 
    282   // Trampolines
    283   case ISD::INIT_TRAMPOLINE:            return "init_trampoline";
    284   case ISD::ADJUST_TRAMPOLINE:          return "adjust_trampoline";
    285 
    286   case ISD::CONDCODE:
    287     switch (cast<CondCodeSDNode>(this)->get()) {
    288     default: llvm_unreachable("Unknown setcc condition!");
    289     case ISD::SETOEQ:                   return "setoeq";
    290     case ISD::SETOGT:                   return "setogt";
    291     case ISD::SETOGE:                   return "setoge";
    292     case ISD::SETOLT:                   return "setolt";
    293     case ISD::SETOLE:                   return "setole";
    294     case ISD::SETONE:                   return "setone";
    295 
    296     case ISD::SETO:                     return "seto";
    297     case ISD::SETUO:                    return "setuo";
    298     case ISD::SETUEQ:                   return "setue";
    299     case ISD::SETUGT:                   return "setugt";
    300     case ISD::SETUGE:                   return "setuge";
    301     case ISD::SETULT:                   return "setult";
    302     case ISD::SETULE:                   return "setule";
    303     case ISD::SETUNE:                   return "setune";
    304 
    305     case ISD::SETEQ:                    return "seteq";
    306     case ISD::SETGT:                    return "setgt";
    307     case ISD::SETGE:                    return "setge";
    308     case ISD::SETLT:                    return "setlt";
    309     case ISD::SETLE:                    return "setle";
    310     case ISD::SETNE:                    return "setne";
    311 
    312     case ISD::SETTRUE:                  return "settrue";
    313     case ISD::SETTRUE2:                 return "settrue2";
    314     case ISD::SETFALSE:                 return "setfalse";
    315     case ISD::SETFALSE2:                return "setfalse2";
    316     }
    317   }
    318 }
    319 
    320 const char *SDNode::getIndexedModeName(ISD::MemIndexedMode AM) {
    321   switch (AM) {
    322   default:              return "";
    323   case ISD::PRE_INC:    return "<pre-inc>";
    324   case ISD::PRE_DEC:    return "<pre-dec>";
    325   case ISD::POST_INC:   return "<post-inc>";
    326   case ISD::POST_DEC:   return "<post-dec>";
    327   }
    328 }
    329 
    330 void SDNode::dump() const { dump(0); }
    331 void SDNode::dump(const SelectionDAG *G) const {
    332   print(dbgs(), G);
    333   dbgs() << '\n';
    334 }
    335 
    336 void SDNode::print_types(raw_ostream &OS, const SelectionDAG *G) const {
    337   OS << (const void*)this << ": ";
    338 
    339   for (unsigned i = 0, e = getNumValues(); i != e; ++i) {
    340     if (i) OS << ",";
    341     if (getValueType(i) == MVT::Other)
    342       OS << "ch";
    343     else
    344       OS << getValueType(i).getEVTString();
    345   }
    346   OS << " = " << getOperationName(G);
    347 }
    348 
    349 void SDNode::print_details(raw_ostream &OS, const SelectionDAG *G) const {
    350   if (const MachineSDNode *MN = dyn_cast<MachineSDNode>(this)) {
    351     if (!MN->memoperands_empty()) {
    352       OS << "<";
    353       OS << "Mem:";
    354       for (MachineSDNode::mmo_iterator i = MN->memoperands_begin(),
    355            e = MN->memoperands_end(); i != e; ++i) {
    356         OS << **i;
    357         if (llvm::next(i) != e)
    358           OS << " ";
    359       }
    360       OS << ">";
    361     }
    362   } else if (const ShuffleVectorSDNode *SVN =
    363                dyn_cast<ShuffleVectorSDNode>(this)) {
    364     OS << "<";
    365     for (unsigned i = 0, e = ValueList[0].getVectorNumElements(); i != e; ++i) {
    366       int Idx = SVN->getMaskElt(i);
    367       if (i) OS << ",";
    368       if (Idx < 0)
    369         OS << "u";
    370       else
    371         OS << Idx;
    372     }
    373     OS << ">";
    374   } else if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) {
    375     OS << '<' << CSDN->getAPIntValue() << '>';
    376   } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) {
    377     if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEsingle)
    378       OS << '<' << CSDN->getValueAPF().convertToFloat() << '>';
    379     else if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEdouble)
    380       OS << '<' << CSDN->getValueAPF().convertToDouble() << '>';
    381     else {
    382       OS << "<APFloat(";
    383       CSDN->getValueAPF().bitcastToAPInt().dump();
    384       OS << ")>";
    385     }
    386   } else if (const GlobalAddressSDNode *GADN =
    387              dyn_cast<GlobalAddressSDNode>(this)) {
    388     int64_t offset = GADN->getOffset();
    389     OS << '<';
    390     WriteAsOperand(OS, GADN->getGlobal());
    391     OS << '>';
    392     if (offset > 0)
    393       OS << " + " << offset;
    394     else
    395       OS << " " << offset;
    396     if (unsigned int TF = GADN->getTargetFlags())
    397       OS << " [TF=" << TF << ']';
    398   } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) {
    399     OS << "<" << FIDN->getIndex() << ">";
    400   } else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(this)) {
    401     OS << "<" << JTDN->getIndex() << ">";
    402     if (unsigned int TF = JTDN->getTargetFlags())
    403       OS << " [TF=" << TF << ']';
    404   } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){
    405     int offset = CP->getOffset();
    406     if (CP->isMachineConstantPoolEntry())
    407       OS << "<" << *CP->getMachineCPVal() << ">";
    408     else
    409       OS << "<" << *CP->getConstVal() << ">";
    410     if (offset > 0)
    411       OS << " + " << offset;
    412     else
    413       OS << " " << offset;
    414     if (unsigned int TF = CP->getTargetFlags())
    415       OS << " [TF=" << TF << ']';
    416   } else if (const TargetIndexSDNode *TI = dyn_cast<TargetIndexSDNode>(this)) {
    417     OS << "<" << TI->getIndex() << '+' << TI->getOffset() << ">";
    418     if (unsigned TF = TI->getTargetFlags())
    419       OS << " [TF=" << TF << ']';
    420   } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) {
    421     OS << "<";
    422     const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
    423     if (LBB)
    424       OS << LBB->getName() << " ";
    425     OS << (const void*)BBDN->getBasicBlock() << ">";
    426   } else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) {
    427     OS << ' ' << PrintReg(R->getReg(), G ? G->getTarget().getRegisterInfo() :0);
    428   } else if (const ExternalSymbolSDNode *ES =
    429              dyn_cast<ExternalSymbolSDNode>(this)) {
    430     OS << "'" << ES->getSymbol() << "'";
    431     if (unsigned int TF = ES->getTargetFlags())
    432       OS << " [TF=" << TF << ']';
    433   } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) {
    434     if (M->getValue())
    435       OS << "<" << M->getValue() << ">";
    436     else
    437       OS << "<null>";
    438   } else if (const MDNodeSDNode *MD = dyn_cast<MDNodeSDNode>(this)) {
    439     if (MD->getMD())
    440       OS << "<" << MD->getMD() << ">";
    441     else
    442       OS << "<null>";
    443   } else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) {
    444     OS << ":" << N->getVT().getEVTString();
    445   }
    446   else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(this)) {
    447     OS << "<" << *LD->getMemOperand();
    448 
    449     bool doExt = true;
    450     switch (LD->getExtensionType()) {
    451     default: doExt = false; break;
    452     case ISD::EXTLOAD:  OS << ", anyext"; break;
    453     case ISD::SEXTLOAD: OS << ", sext"; break;
    454     case ISD::ZEXTLOAD: OS << ", zext"; break;
    455     }
    456     if (doExt)
    457       OS << " from " << LD->getMemoryVT().getEVTString();
    458 
    459     const char *AM = getIndexedModeName(LD->getAddressingMode());
    460     if (*AM)
    461       OS << ", " << AM;
    462 
    463     OS << ">";
    464   } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(this)) {
    465     OS << "<" << *ST->getMemOperand();
    466 
    467     if (ST->isTruncatingStore())
    468       OS << ", trunc to " << ST->getMemoryVT().getEVTString();
    469 
    470     const char *AM = getIndexedModeName(ST->getAddressingMode());
    471     if (*AM)
    472       OS << ", " << AM;
    473 
    474     OS << ">";
    475   } else if (const MemSDNode* M = dyn_cast<MemSDNode>(this)) {
    476     OS << "<" << *M->getMemOperand() << ">";
    477   } else if (const BlockAddressSDNode *BA =
    478                dyn_cast<BlockAddressSDNode>(this)) {
    479     int64_t offset = BA->getOffset();
    480     OS << "<";
    481     WriteAsOperand(OS, BA->getBlockAddress()->getFunction(), false);
    482     OS << ", ";
    483     WriteAsOperand(OS, BA->getBlockAddress()->getBasicBlock(), false);
    484     OS << ">";
    485     if (offset > 0)
    486       OS << " + " << offset;
    487     else
    488       OS << " " << offset;
    489     if (unsigned int TF = BA->getTargetFlags())
    490       OS << " [TF=" << TF << ']';
    491   }
    492 
    493   if (G)
    494     if (unsigned Order = G->GetOrdering(this))
    495       OS << " [ORD=" << Order << ']';
    496 
    497   if (getNodeId() != -1)
    498     OS << " [ID=" << getNodeId() << ']';
    499 
    500   DebugLoc dl = getDebugLoc();
    501   if (G && !dl.isUnknown()) {
    502     DIScope
    503       Scope(dl.getScope(G->getMachineFunction().getFunction()->getContext()));
    504     OS << " dbg:";
    505     // Omit the directory, since it's usually long and uninteresting.
    506     if (Scope.Verify())
    507       OS << Scope.getFilename();
    508     else
    509       OS << "<unknown>";
    510     OS << ':' << dl.getLine();
    511     if (dl.getCol() != 0)
    512       OS << ':' << dl.getCol();
    513   }
    514 }
    515 
    516 static void DumpNodes(const SDNode *N, unsigned indent, const SelectionDAG *G) {
    517   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
    518     if (N->getOperand(i).getNode()->hasOneUse())
    519       DumpNodes(N->getOperand(i).getNode(), indent+2, G);
    520     else
    521       dbgs() << "\n" << std::string(indent+2, ' ')
    522              << (void*)N->getOperand(i).getNode() << ": <multiple use>";
    523 
    524   dbgs() << '\n';
    525   dbgs().indent(indent);
    526   N->dump(G);
    527 }
    528 
    529 void SelectionDAG::dump() const {
    530   dbgs() << "SelectionDAG has " << AllNodes.size() << " nodes:";
    531 
    532   for (allnodes_const_iterator I = allnodes_begin(), E = allnodes_end();
    533        I != E; ++I) {
    534     const SDNode *N = I;
    535     if (!N->hasOneUse() && N != getRoot().getNode())
    536       DumpNodes(N, 2, this);
    537   }
    538 
    539   if (getRoot().getNode()) DumpNodes(getRoot().getNode(), 2, this);
    540   dbgs() << "\n\n";
    541 }
    542 
    543 void SDNode::printr(raw_ostream &OS, const SelectionDAG *G) const {
    544   print_types(OS, G);
    545   print_details(OS, G);
    546 }
    547 
    548 typedef SmallPtrSet<const SDNode *, 128> VisitedSDNodeSet;
    549 static void DumpNodesr(raw_ostream &OS, const SDNode *N, unsigned indent,
    550                        const SelectionDAG *G, VisitedSDNodeSet &once) {
    551   if (!once.insert(N))          // If we've been here before, return now.
    552     return;
    553 
    554   // Dump the current SDNode, but don't end the line yet.
    555   OS.indent(indent);
    556   N->printr(OS, G);
    557 
    558   // Having printed this SDNode, walk the children:
    559   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    560     const SDNode *child = N->getOperand(i).getNode();
    561 
    562     if (i) OS << ",";
    563     OS << " ";
    564 
    565     if (child->getNumOperands() == 0) {
    566       // This child has no grandchildren; print it inline right here.
    567       child->printr(OS, G);
    568       once.insert(child);
    569     } else {         // Just the address. FIXME: also print the child's opcode.
    570       OS << (const void*)child;
    571       if (unsigned RN = N->getOperand(i).getResNo())
    572         OS << ":" << RN;
    573     }
    574   }
    575 
    576   OS << "\n";
    577 
    578   // Dump children that have grandchildren on their own line(s).
    579   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    580     const SDNode *child = N->getOperand(i).getNode();
    581     DumpNodesr(OS, child, indent+2, G, once);
    582   }
    583 }
    584 
    585 void SDNode::dumpr() const {
    586   VisitedSDNodeSet once;
    587   DumpNodesr(dbgs(), this, 0, 0, once);
    588 }
    589 
    590 void SDNode::dumpr(const SelectionDAG *G) const {
    591   VisitedSDNodeSet once;
    592   DumpNodesr(dbgs(), this, 0, G, once);
    593 }
    594 
    595 static void printrWithDepthHelper(raw_ostream &OS, const SDNode *N,
    596                                   const SelectionDAG *G, unsigned depth,
    597                                   unsigned indent) {
    598   if (depth == 0)
    599     return;
    600 
    601   OS.indent(indent);
    602 
    603   N->print(OS, G);
    604 
    605   if (depth < 1)
    606     return;
    607 
    608   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    609     // Don't follow chain operands.
    610     if (N->getOperand(i).getValueType() == MVT::Other)
    611       continue;
    612     OS << '\n';
    613     printrWithDepthHelper(OS, N->getOperand(i).getNode(), G, depth-1, indent+2);
    614   }
    615 }
    616 
    617 void SDNode::printrWithDepth(raw_ostream &OS, const SelectionDAG *G,
    618                             unsigned depth) const {
    619   printrWithDepthHelper(OS, this, G, depth, 0);
    620 }
    621 
    622 void SDNode::printrFull(raw_ostream &OS, const SelectionDAG *G) const {
    623   // Don't print impossibly deep things.
    624   printrWithDepth(OS, G, 10);
    625 }
    626 
    627 void SDNode::dumprWithDepth(const SelectionDAG *G, unsigned depth) const {
    628   printrWithDepth(dbgs(), G, depth);
    629 }
    630 
    631 void SDNode::dumprFull(const SelectionDAG *G) const {
    632   // Don't print impossibly deep things.
    633   dumprWithDepth(G, 10);
    634 }
    635 
    636 void SDNode::print(raw_ostream &OS, const SelectionDAG *G) const {
    637   print_types(OS, G);
    638   for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
    639     if (i) OS << ", "; else OS << " ";
    640     OS << (void*)getOperand(i).getNode();
    641     if (unsigned RN = getOperand(i).getResNo())
    642       OS << ":" << RN;
    643   }
    644   print_details(OS, G);
    645 }
    646