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