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//===-- SystemZConstantPoolValue.cpp - SystemZ constant-pool value --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "SystemZConstantPoolValue.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
SystemZConstantPoolValue::
SystemZConstantPoolValue(const GlobalValue *gv,
SystemZCP::SystemZCPModifier modifier)
: MachineConstantPoolValue(gv->getType()), GV(gv), Modifier(modifier) {}
SystemZConstantPoolValue *
SystemZConstantPoolValue::Create(const GlobalValue *GV,
SystemZCP::SystemZCPModifier Modifier) {
return new SystemZConstantPoolValue(GV, Modifier);
}
unsigned SystemZConstantPoolValue::getRelocationInfo() const {
switch (Modifier) {
case SystemZCP::NTPOFF:
// May require a relocation, but the relocations are always resolved
// by the static linker.
return 1;
}
llvm_unreachable("Unknown modifier");
}
int SystemZConstantPoolValue::
getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
unsigned AlignMask = Alignment - 1;
const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
if (Constants[I].isMachineConstantPoolEntry() &&
(Constants[I].getAlignment() & AlignMask) == 0) {
SystemZConstantPoolValue *ZCPV =
static_cast<SystemZConstantPoolValue *>(Constants[I].Val.MachineCPVal);
if (ZCPV->GV == GV && ZCPV->Modifier == Modifier)
return I;
}
}
return -1;
}
void SystemZConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
ID.AddPointer(GV);
ID.AddInteger(Modifier);
}
void SystemZConstantPoolValue::print(raw_ostream &O) const {
O << GV << "@" << int(Modifier);
}
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