contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.cpp

   1 //===-- ARMConstantPoolValue.cpp - ARM constantpool value -----------------===//
   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 file implements the ARM specific constantpool value class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "ARMConstantPoolValue.h"
  15 #include "llvm/ADT/FoldingSet.h"
  16 #include "llvm/ADT/StringRef.h"
  17 #include "llvm/CodeGen/MachineBasicBlock.h"
  18 #include "llvm/IR/Constant.h"
  19 #include "llvm/IR/Constants.h"
  20 #include "llvm/IR/GlobalValue.h"
  21 #include "llvm/IR/Type.h"
  22 #include "llvm/Support/Casting.h"
  23 #include "llvm/Support/Compiler.h"
  24 #include "llvm/Support/ErrorHandling.h"
  25 #include "llvm/Support/raw_ostream.h"
  26
  27 using namespace llvm;
  28
  29 //===----------------------------------------------------------------------===//
  30 // ARMConstantPoolValue
  31 //===----------------------------------------------------------------------===//
  32
  33 ARMConstantPoolValue::ARMConstantPoolValue(Type *Ty, unsigned id,
  34                                            ARMCP::ARMCPKind kind,
  35                                            unsigned char PCAdj,
  36                                            ARMCP::ARMCPModifier modifier,
  37                                            bool addCurrentAddress)
  38   : MachineConstantPoolValue(Ty), LabelId(id), Kind(kind),
  39     PCAdjust(PCAdj), Modifier(modifier),
  40     AddCurrentAddress(addCurrentAddress) {}
  41
  42 ARMConstantPoolValue::ARMConstantPoolValue(LLVMContext &C, unsigned id,
  43                                            ARMCP::ARMCPKind kind,
  44                                            unsigned char PCAdj,
  45                                            ARMCP::ARMCPModifier modifier,
  46                                            bool addCurrentAddress)
  47   : MachineConstantPoolValue((Type*)Type::getInt32Ty(C)),
  48     LabelId(id), Kind(kind), PCAdjust(PCAdj), Modifier(modifier),
  49     AddCurrentAddress(addCurrentAddress) {}
  50
  51 ARMConstantPoolValue::~ARMConstantPoolValue() = default;
  52
  53 StringRef ARMConstantPoolValue::getModifierText() const {
  54   switch (Modifier) {
  55     // FIXME: Are these case sensitive? It'd be nice to lower-case all the
  56     // strings if that's legal.
  57   case ARMCP::no_modifier:
  58     return "none";
  59   case ARMCP::TLSGD:
  60     return "tlsgd";
  61   case ARMCP::GOT_PREL:
  62     return "GOT_PREL";
  63   case ARMCP::GOTTPOFF:
  64     return "gottpoff";
  65   case ARMCP::TPOFF:
  66     return "tpoff";
  67   case ARMCP::SBREL:
  68     return "SBREL";
  69   case ARMCP::SECREL:
  70     return "secrel32";
  71   }
  72   llvm_unreachable("Unknown modifier!");
  73 }
  74
  75 int ARMConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
  76                                                     unsigned Alignment) {
  77   llvm_unreachable("Shouldn't be calling this directly!");
  78 }
  79
  80 void
  81 ARMConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
  82   ID.AddInteger(LabelId);
  83   ID.AddInteger(PCAdjust);
  84 }
  85
  86 bool
  87 ARMConstantPoolValue::hasSameValue(ARMConstantPoolValue *ACPV) {
  88   if (ACPV->Kind == Kind &&
  89       ACPV->PCAdjust == PCAdjust &&
  90       ACPV->Modifier == Modifier &&
  91       ACPV->LabelId == LabelId &&
  92       ACPV->AddCurrentAddress == AddCurrentAddress) {
  93     // Two PC relative constpool entries containing the same GV address or
  94     // external symbols. FIXME: What about blockaddress?
  95     if (Kind == ARMCP::CPValue || Kind == ARMCP::CPExtSymbol)
  96       return true;
  97   }
  98   return false;
  99 }
 100
 101 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
 102 LLVM_DUMP_METHOD void ARMConstantPoolValue::dump() const {
 103   errs() << "  " << *this;
 104 }
 105 #endif
 106
 107 void ARMConstantPoolValue::print(raw_ostream &O) const {
 108   if (Modifier) O << "(" << getModifierText() << ")";
 109   if (PCAdjust != 0) {
 110     O << "-(LPC" << LabelId << "+" << (unsigned)PCAdjust;
 111     if (AddCurrentAddress) O << "-.";
 112     O << ")";
 113   }
 114 }
 115
 116 //===----------------------------------------------------------------------===//
 117 // ARMConstantPoolConstant
 118 //===----------------------------------------------------------------------===//
 119
 120 ARMConstantPoolConstant::ARMConstantPoolConstant(Type *Ty,
 121                                                  const Constant *C,
 122                                                  unsigned ID,
 123                                                  ARMCP::ARMCPKind Kind,
 124                                                  unsigned char PCAdj,
 125                                                  ARMCP::ARMCPModifier Modifier,
 126                                                  bool AddCurrentAddress)
 127   : ARMConstantPoolValue(Ty, ID, Kind, PCAdj, Modifier, AddCurrentAddress),
 128     CVal(C) {}
 129
 130 ARMConstantPoolConstant::ARMConstantPoolConstant(const Constant *C,
 131                                                  unsigned ID,
 132                                                  ARMCP::ARMCPKind Kind,
 133                                                  unsigned char PCAdj,
 134                                                  ARMCP::ARMCPModifier Modifier,
 135                                                  bool AddCurrentAddress)
 136   : ARMConstantPoolValue((Type*)C->getType(), ID, Kind, PCAdj, Modifier,
 137                          AddCurrentAddress),
 138     CVal(C) {}
 139
 140 ARMConstantPoolConstant::ARMConstantPoolConstant(const GlobalVariable *GV,
 141                                                  const Constant *C)
 142     : ARMConstantPoolValue((Type *)C->getType(), 0, ARMCP::CPPromotedGlobal, 0,
 143                            ARMCP::no_modifier, false),
 144       CVal(C), GVar(GV) {}
 145
 146 ARMConstantPoolConstant *
 147 ARMConstantPoolConstant::Create(const Constant *C, unsigned ID) {
 148   return new ARMConstantPoolConstant(C, ID, ARMCP::CPValue, 0,
 149                                      ARMCP::no_modifier, false);
 150 }
 151
 152 ARMConstantPoolConstant *
 153 ARMConstantPoolConstant::Create(const GlobalVariable *GVar,
 154                                 const Constant *Initializer) {
 155   return new ARMConstantPoolConstant(GVar, Initializer);
 156 }
 157
 158 ARMConstantPoolConstant *
 159 ARMConstantPoolConstant::Create(const GlobalValue *GV,
 160                                 ARMCP::ARMCPModifier Modifier) {
 161   return new ARMConstantPoolConstant((Type*)Type::getInt32Ty(GV->getContext()),
 162                                      GV, 0, ARMCP::CPValue, 0,
 163                                      Modifier, false);
 164 }
 165
 166 ARMConstantPoolConstant *
 167 ARMConstantPoolConstant::Create(const Constant *C, unsigned ID,
 168                                 ARMCP::ARMCPKind Kind, unsigned char PCAdj) {
 169   return new ARMConstantPoolConstant(C, ID, Kind, PCAdj,
 170                                      ARMCP::no_modifier, false);
 171 }
 172
 173 ARMConstantPoolConstant *
 174 ARMConstantPoolConstant::Create(const Constant *C, unsigned ID,
 175                                 ARMCP::ARMCPKind Kind, unsigned char PCAdj,
 176                                 ARMCP::ARMCPModifier Modifier,
 177                                 bool AddCurrentAddress) {
 178   return new ARMConstantPoolConstant(C, ID, Kind, PCAdj, Modifier,
 179                                      AddCurrentAddress);
 180 }
 181
 182 const GlobalValue *ARMConstantPoolConstant::getGV() const {
 183   return dyn_cast_or_null<GlobalValue>(CVal);
 184 }
 185
 186 const BlockAddress *ARMConstantPoolConstant::getBlockAddress() const {
 187   return dyn_cast_or_null<BlockAddress>(CVal);
 188 }
 189
 190 int ARMConstantPoolConstant::getExistingMachineCPValue(MachineConstantPool *CP,
 191                                                        unsigned Alignment) {
 192   return getExistingMachineCPValueImpl<ARMConstantPoolConstant>(CP, Alignment);
 193 }
 194
 195 bool ARMConstantPoolConstant::hasSameValue(ARMConstantPoolValue *ACPV) {
 196   const ARMConstantPoolConstant *ACPC = dyn_cast<ARMConstantPoolConstant>(ACPV);
 197   return ACPC && ACPC->CVal == CVal && ARMConstantPoolValue::hasSameValue(ACPV);
 198 }
 199
 200 void ARMConstantPoolConstant::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
 201   ID.AddPointer(CVal);
 202   ARMConstantPoolValue::addSelectionDAGCSEId(ID);
 203 }
 204
 205 void ARMConstantPoolConstant::print(raw_ostream &O) const {
 206   O << CVal->getName();
 207   ARMConstantPoolValue::print(O);
 208 }
 209
 210 //===----------------------------------------------------------------------===//
 211 // ARMConstantPoolSymbol
 212 //===----------------------------------------------------------------------===//
 213
 214 ARMConstantPoolSymbol::ARMConstantPoolSymbol(LLVMContext &C, StringRef s,
 215                                              unsigned id, unsigned char PCAdj,
 216                                              ARMCP::ARMCPModifier Modifier,
 217                                              bool AddCurrentAddress)
 218     : ARMConstantPoolValue(C, id, ARMCP::CPExtSymbol, PCAdj, Modifier,
 219                            AddCurrentAddress),
 220       S(s) {}
 221
 222 ARMConstantPoolSymbol *ARMConstantPoolSymbol::Create(LLVMContext &C,
 223                                                      StringRef s, unsigned ID,
 224                                                      unsigned char PCAdj) {
 225   return new ARMConstantPoolSymbol(C, s, ID, PCAdj, ARMCP::no_modifier, false);
 226 }
 227
 228 int ARMConstantPoolSymbol::getExistingMachineCPValue(MachineConstantPool *CP,
 229                                                      unsigned Alignment) {
 230   return getExistingMachineCPValueImpl<ARMConstantPoolSymbol>(CP, Alignment);
 231 }
 232
 233 bool ARMConstantPoolSymbol::hasSameValue(ARMConstantPoolValue *ACPV) {
 234   const ARMConstantPoolSymbol *ACPS = dyn_cast<ARMConstantPoolSymbol>(ACPV);
 235   return ACPS && ACPS->S == S && ARMConstantPoolValue::hasSameValue(ACPV);
 236 }
 237
 238 void ARMConstantPoolSymbol::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
 239   ID.AddString(S);
 240   ARMConstantPoolValue::addSelectionDAGCSEId(ID);
 241 }
 242
 243 void ARMConstantPoolSymbol::print(raw_ostream &O) const {
 244   O << S;
 245   ARMConstantPoolValue::print(O);
 246 }
 247
 248 //===----------------------------------------------------------------------===//
 249 // ARMConstantPoolMBB
 250 //===----------------------------------------------------------------------===//
 251
 252 ARMConstantPoolMBB::ARMConstantPoolMBB(LLVMContext &C,
 253                                        const MachineBasicBlock *mbb,
 254                                        unsigned id, unsigned char PCAdj,
 255                                        ARMCP::ARMCPModifier Modifier,
 256                                        bool AddCurrentAddress)
 257   : ARMConstantPoolValue(C, id, ARMCP::CPMachineBasicBlock, PCAdj,
 258                          Modifier, AddCurrentAddress),
 259     MBB(mbb) {}
 260
 261 ARMConstantPoolMBB *ARMConstantPoolMBB::Create(LLVMContext &C,
 262                                                const MachineBasicBlock *mbb,
 263                                                unsigned ID,
 264                                                unsigned char PCAdj) {
 265   return new ARMConstantPoolMBB(C, mbb, ID, PCAdj, ARMCP::no_modifier, false);
 266 }
 267
 268 int ARMConstantPoolMBB::getExistingMachineCPValue(MachineConstantPool *CP,
 269                                                   unsigned Alignment) {
 270   return getExistingMachineCPValueImpl<ARMConstantPoolMBB>(CP, Alignment);
 271 }
 272
 273 bool ARMConstantPoolMBB::hasSameValue(ARMConstantPoolValue *ACPV) {
 274   const ARMConstantPoolMBB *ACPMBB = dyn_cast<ARMConstantPoolMBB>(ACPV);
 275   return ACPMBB && ACPMBB->MBB == MBB &&
 276     ARMConstantPoolValue::hasSameValue(ACPV);
 277 }
 278
 279 void ARMConstantPoolMBB::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
 280   ID.AddPointer(MBB);
 281   ARMConstantPoolValue::addSelectionDAGCSEId(ID);
 282 }
 283
 284 void ARMConstantPoolMBB::print(raw_ostream &O) const {
 285   O << "BB#" << MBB->getNumber();
 286   ARMConstantPoolValue::print(O);
 287 }