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/raw_ostream.h"
  19 #include <cstdlib>
  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(LLVMContext &C,
  32                                            const char *s, unsigned id,
  33                                            unsigned char PCAdj,
  34                                            const char *Modif,
  35                                            bool AddCA)
  36   : MachineConstantPoolValue((const Type*)Type::getInt32Ty(C)),
  37     GV(NULL), S(strdup(s)), LabelId(id), Kind(ARMCP::CPValue), PCAdjust(PCAdj),
  38     Modifier(Modif), AddCurrentAddress(AddCA) {}
  39
  40 ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv, const char *Modif)
  41   : MachineConstantPoolValue((const Type*)Type::getInt32Ty(gv->getContext())),
  42     GV(gv), S(NULL), LabelId(0), Kind(ARMCP::CPValue), PCAdjust(0),
  43     Modifier(Modif) {}
  44
  45 int ARMConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
  46                                                     unsigned Alignment) {
  47   unsigned AlignMask = 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].getAlignment() & 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->PCAdjust == PCAdjust)
  58         return i;
  59     }
  60   }
  61
  62   return -1;
  63 }
  64
  65 ARMConstantPoolValue::~ARMConstantPoolValue() {
  66   free((void*)S);
  67 }
  68
  69 void
  70 ARMConstantPoolValue::AddSelectionDAGCSEId(FoldingSetNodeID &ID) {
  71   ID.AddPointer(GV);
  72   ID.AddPointer(S);
  73   ID.AddInteger(LabelId);
  74   ID.AddInteger(PCAdjust);
  75 }
  76
  77 void ARMConstantPoolValue::dump() const {
  78   errs() << "  " << *this;
  79 }
  80
  81
  82 void ARMConstantPoolValue::print(raw_ostream &O) const {
  83   if (GV)
  84     O << GV->getName();
  85   else
  86     O << S;
  87   if (Modifier) O << "(" << Modifier << ")";
  88   if (PCAdjust != 0) {
  89     O << "-(LPC" << LabelId << "+" << (unsigned)PCAdjust;
  90     if (AddCurrentAddress) O << "-.";
  91     O << ")";
  92   }
  93 }