lib/Target/ARM/ARMConstantPoolValue.cpp

   1 //===- ARMConstantPoolValue.cpp - ARM constantpool value --------*- C++ -*-===//
   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/GlobalValue.h"
  17 #include "llvm/Type.h"
  18 using namespace llvm;
  19
  20 ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv, unsigned id,
  21                                            ARMCP::ARMCPKind k,
  22                                            unsigned char PCAdj,
  23                                            const char *Modif,
  24                                            bool AddCA)
  25   : MachineConstantPoolValue((const Type*)gv->getType()),
  26     GV(gv), S(NULL), LabelId(id), Kind(k), PCAdjust(PCAdj),
  27     Modifier(Modif), AddCurrentAddress(AddCA) {}
  28
  29 ARMConstantPoolValue::ARMConstantPoolValue(const char *s, unsigned id,
  30                                            ARMCP::ARMCPKind k,
  31                                            unsigned char PCAdj,
  32                                            const char *Modif,
  33                                            bool AddCA)
  34   : MachineConstantPoolValue((const Type*)Type::Int32Ty),
  35     GV(NULL), S(s), LabelId(id), Kind(k), PCAdjust(PCAdj),
  36     Modifier(Modif), AddCurrentAddress(AddCA) {}
  37
  38 ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv,
  39                                            ARMCP::ARMCPKind k,
  40                                            const char *Modif)
  41   : MachineConstantPoolValue((const Type*)Type::Int32Ty),
  42     GV(gv), S(NULL), LabelId(0), Kind(k), PCAdjust(0),
  43     Modifier(Modif) {}
  44
  45 int ARMConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
  46                                                     unsigned Alignment) {
  47   unsigned AlignMask = (1 << Alignment)-1;
  48   const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
  49   for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
  50     if (Constants[i].isMachineConstantPoolEntry() &&
  51         (Constants[i].Offset & AlignMask) == 0) {
  52       ARMConstantPoolValue *CPV =
  53         (ARMConstantPoolValue *)Constants[i].Val.MachineCPVal;
  54       if (CPV->GV == GV &&
  55           CPV->S == S &&
  56           CPV->LabelId == LabelId &&
  57           CPV->Kind == Kind &&
  58           CPV->PCAdjust == PCAdjust)
  59         return i;
  60     }
  61   }
  62
  63   return -1;
  64 }
  65
  66 void
  67 ARMConstantPoolValue::AddSelectionDAGCSEId(FoldingSetNodeID &ID) {
  68   ID.AddPointer(GV);
  69   ID.AddPointer(S);
  70   ID.AddInteger(LabelId);
  71   ID.AddInteger((unsigned)Kind);
  72   ID.AddInteger(PCAdjust);
  73 }
  74
  75 void ARMConstantPoolValue::print(std::ostream &O) const {
  76   if (GV)
  77     O << GV->getName();
  78   else
  79     O << S;
  80   if (isNonLazyPointer()) O << "$non_lazy_ptr";
  81   else if (isStub()) O << "$stub";
  82   if (Modifier) O << "(" << Modifier << ")";
  83   if (PCAdjust != 0) {
  84     O << "-(LPIC" << LabelId << "+"
  85       << (unsigned)PCAdjust;
  86     if (AddCurrentAddress)
  87       O << "-.";
  88     O << ")";
  89   }
  90 }