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
16using namespace llvm;
17
18SystemZConstantPoolValue::
19SystemZConstantPoolValue(const GlobalValue *gv,
20                         SystemZCP::SystemZCPModifier modifier)
21  : MachineConstantPoolValue(gv->getType()), GV(gv), Modifier(modifier) {}
22
23SystemZConstantPoolValue *
24SystemZConstantPoolValue::Create(const GlobalValue *GV,
25                                 SystemZCP::SystemZCPModifier Modifier) {
26  return new SystemZConstantPoolValue(GV, Modifier);
27}
28
29unsigned SystemZConstantPoolValue::getRelocationInfo() const {
30  switch (Modifier) {
31  case SystemZCP::NTPOFF:
32    // May require a relocation, but the relocations are always resolved
33    // by the static linker.
34    return 1;
35  }
36  llvm_unreachable("Unknown modifier");
37}
38
39int SystemZConstantPoolValue::
40getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
41  unsigned AlignMask = Alignment - 1;
42  const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
43  for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
44    if (Constants[I].isMachineConstantPoolEntry() &&
45        (Constants[I].getAlignment() & AlignMask) == 0) {
46      auto *ZCPV =
47        static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal);
48      if (ZCPV->GV == GV && ZCPV->Modifier == Modifier)
49        return I;
50    }
51  }
52  return -1;
53}
54
55void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
56  ID.AddPointer(GV);
57  ID.AddInteger(Modifier);
58}
59
60void SystemZConstantPoolValue::print(raw_ostream &O) const {
61  O << GV << "@" << int(Modifier);
62}
63