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