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 unsigned 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 39 int SystemZConstantPoolValue:: 40 getExistingMachineCPValue(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 55 void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) { 56 ID.AddPointer(GV); 57 ID.AddInteger(Modifier); 58 } 59 60 void SystemZConstantPoolValue::print(raw_ostream &O) const { 61 O << GV << "@" << int(Modifier); 62 } 63
