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 #include "llvm/Support/Streams.h"
  19 #include "llvm/Support/raw_ostream.h"
  20 #include <ostream>
  21 using namespace llvm;
  22
  23 ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv, unsigned id,
  24                                            ARMCP::ARMCPKind k,
  25                                            unsigned char PCAdj,
  26                                            const char *Modif,
  27                                            bool AddCA)
  28   : MachineConstantPoolValue((const Type*)gv->getType()),
  29     GV(gv), S(NULL), LabelId(id), Kind(k), PCAdjust(PCAdj),
  30     Modifier(Modif), AddCurrentAddress(AddCA) {}
  31
  32 ARMConstantPoolValue::ARMConstantPoolValue(const char *s, unsigned id,
  33                                            ARMCP::ARMCPKind k,
  34                                            unsigned char PCAdj,
  35                                            const char *Modif,
  36                                            bool AddCA)
  37   : MachineConstantPoolValue((const Type*)Type::Int32Ty),
  38     GV(NULL), S(s), LabelId(id), Kind(k), PCAdjust(PCAdj),
  39     Modifier(Modif), AddCurrentAddress(AddCA) {}
  40
  41 ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv,
  42                                            ARMCP::ARMCPKind k,
  43                                            const char *Modif)
  44   : MachineConstantPoolValue((const Type*)Type::Int32Ty),
  45     GV(gv), S(NULL), LabelId(0), Kind(k), PCAdjust(0),
  46     Modifier(Modif) {}
  47
  48 int ARMConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
  49                                                     unsigned Alignment) {
  50   unsigned AlignMask = Alignment - 1;
  51   const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
  52   for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
  53     if (Constants[i].isMachineConstantPoolEntry() &&
  54         (Constants[i].getAlignment() & AlignMask) == 0) {
  55       ARMConstantPoolValue *CPV =
  56         (ARMConstantPoolValue *)Constants[i].Val.MachineCPVal;
  57       if (CPV->GV == GV &&
  58           CPV->S == S &&
  59           CPV->LabelId == LabelId &&
  60           CPV->Kind == Kind &&
  61           CPV->PCAdjust == PCAdjust)
  62         return i;
  63     }
  64   }
  65
  66   return -1;
  67 }
  68
  69 void
  70 ARMConstantPoolValue::AddSelectionDAGCSEId(FoldingSetNodeID &ID) {
  71   ID.AddPointer(GV);
  72   ID.AddPointer(S);
  73   ID.AddInteger(LabelId);
  74   ID.AddInteger((unsigned)Kind);
  75   ID.AddInteger(PCAdjust);
  76 }
  77
  78 void ARMConstantPoolValue::dump() const {
  79   cerr << "  " << *this;
  80 }
  81
  82 void ARMConstantPoolValue::print(std::ostream &O) const {
  83   raw_os_ostream RawOS(O);
  84   print(RawOS);
  85 }
  86
  87 void ARMConstantPoolValue::print(raw_ostream &O) const {
  88   if (GV)
  89     O << GV->getName();
  90   else
  91     O << S;
  92   if (isNonLazyPointer()) O << "$non_lazy_ptr";
  93   else if (isStub()) O << "$stub";
  94   if (Modifier) O << "(" << Modifier << ")";
  95   if (PCAdjust != 0) {
  96     O << "-(LPC" << LabelId << "+" << (unsigned)PCAdjust;
  97     if (AddCurrentAddress) O << "-.";
  98     O << ")";
  99   }
 100 }