lib/Target/SystemZ/SystemZConstantPoolValue.cpp

   1 //===-- SystemZConstantPoolValue.cpp - SystemZ constant-pool 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 #include "SystemZConstantPoolValue.h"
  11 #include "llvm/ADT/FoldingSet.h"
  12 #include "llvm/IR/DerivedTypes.h"
  13 #include "llvm/IR/GlobalValue.h"
  14 #include "llvm/Support/raw_ostream.h"
  15
  16 using namespace llvm;
  17
  18 SystemZConstantPoolValue::
  19 SystemZConstantPoolValue(const GlobalValue *gv,
  20                          SystemZCP::SystemZCPModifier modifier)
  21   : MachineConstantPoolValue(gv->getType()), GV(gv), Modifier(modifier) {}
  22
  23 SystemZConstantPoolValue *
  24 SystemZConstantPoolValue::Create(const GlobalValue *GV,
  25                                  SystemZCP::SystemZCPModifier Modifier) {
  26   return new SystemZConstantPoolValue(GV, Modifier);
  27 }
  28
  29 int SystemZConstantPoolValue::
  30 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
  31   unsigned AlignMask = Alignment - 1;
  32   const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
  33   for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
  34     if (Constants[I].isMachineConstantPoolEntry() &&
  35         (Constants[I].getAlignment() & AlignMask) == 0) {
  36       auto *ZCPV =
  37         static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal);
  38       if (ZCPV->GV == GV && ZCPV->Modifier == Modifier)
  39         return I;
  40     }
  41   }
  42   return -1;
  43 }
  44
  45 void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
  46   ID.AddPointer(GV);
  47   ID.AddInteger(Modifier);
  48 }
  49
  50 void SystemZConstantPoolValue::print(raw_ostream &O) const {
  51   O << GV << "@" << int(Modifier);
  52 }