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::TLSGD: 32 case SystemZCP::TLSLDM: 33 case SystemZCP::DTPOFF: 34 // May require a dynamic relocation. 35 return 2; 36 case SystemZCP::NTPOFF: 37 // May require a relocation, but the relocations are always resolved 38 // by the static linker. 39 return 1; 40 } 41 llvm_unreachable("Unknown modifier"); 42} 43 44int SystemZConstantPoolValue:: 45getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) { 46 unsigned AlignMask = Alignment - 1; 47 const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants(); 48 for (unsigned I = 0, E = Constants.size(); I != E; ++I) { 49 if (Constants[I].isMachineConstantPoolEntry() && 50 (Constants[I].getAlignment() & AlignMask) == 0) { 51 auto *ZCPV = 52 static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal); 53 if (ZCPV->GV == GV && ZCPV->Modifier == Modifier) 54 return I; 55 } 56 } 57 return -1; 58} 59 60void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) { 61 ID.AddPointer(GV); 62 ID.AddInteger(Modifier); 63} 64 65void SystemZConstantPoolValue::print(raw_ostream &O) const { 66 O << GV << "@" << int(Modifier); 67} 68