lib/Target/SystemZ/SystemZConstantPoolValue.cpp

   1 //===-- SystemZConstantPoolValue.cpp - SystemZ constant-pool value --------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "SystemZConstantPoolValue.h"
  10 #include "llvm/ADT/FoldingSet.h"
  11 #include "llvm/IR/DerivedTypes.h"
  12 #include "llvm/IR/GlobalValue.h"
  13 #include "llvm/Support/raw_ostream.h"
  14
  15 using namespace llvm;
  16
  17 SystemZConstantPoolValue::
  18 SystemZConstantPoolValue(const GlobalValue *gv,
  19                          SystemZCP::SystemZCPModifier modifier)
  20   : MachineConstantPoolValue(gv->getType()), GV(gv), Modifier(modifier) {}
  21
  22 SystemZConstantPoolValue *
  23 SystemZConstantPoolValue::Create(const GlobalValue *GV,
  24                                  SystemZCP::SystemZCPModifier Modifier) {
  25   return new SystemZConstantPoolValue(GV, Modifier);
  26 }
  27
  28 int SystemZConstantPoolValue::
  29 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
  30   unsigned AlignMask = Alignment - 1;
  31   const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
  32   for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
  33     if (Constants[I].isMachineConstantPoolEntry() &&
  34         (Constants[I].getAlignment() & AlignMask) == 0) {
  35       auto *ZCPV =
  36         static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal);
  37       if (ZCPV->GV == GV && ZCPV->Modifier == Modifier)
  38         return I;
  39     }
  40   }
  41   return -1;
  42 }
  43
  44 void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
  45   ID.AddPointer(GV);
  46   ID.AddInteger(Modifier);
  47 }
  48
  49 void SystemZConstantPoolValue::print(raw_ostream &O) const {
  50   O << GV << "@" << int(Modifier);
  51 }