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//===- ARMConstantPoolValue.cpp - ARM constantpool value --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the ARM specific constantpool value class.
//
//===----------------------------------------------------------------------===//
#include "ARMConstantPoolValue.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/Constant.h"
#include "llvm/Constants.h"
#include "llvm/GlobalValue.h"
#include "llvm/Type.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
using namespace llvm;
ARMConstantPoolValue::ARMConstantPoolValue(const Constant *cval, unsigned id,
ARMCP::ARMCPKind K,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modif,
bool AddCA)
: MachineConstantPoolValue((Type*)cval->getType()),
CVal(cval), S(NULL), LabelId(id), Kind(K), PCAdjust(PCAdj),
Modifier(Modif), AddCurrentAddress(AddCA) {}
ARMConstantPoolValue::ARMConstantPoolValue(LLVMContext &C,
const MachineBasicBlock *mbb,
unsigned id,
ARMCP::ARMCPKind K,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modif,
bool AddCA)
: MachineConstantPoolValue((Type*)Type::getInt8PtrTy(C)),
CVal(NULL), MBB(mbb), S(NULL), LabelId(id), Kind(K), PCAdjust(PCAdj),
Modifier(Modif), AddCurrentAddress(AddCA) {}
ARMConstantPoolValue::ARMConstantPoolValue(LLVMContext &C,
const char *s, unsigned id,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modif,
bool AddCA)
: MachineConstantPoolValue((Type*)Type::getInt32Ty(C)),
CVal(NULL), S(strdup(s)), LabelId(id), Kind(ARMCP::CPExtSymbol),
PCAdjust(PCAdj), Modifier(Modif), AddCurrentAddress(AddCA) {}
ARMConstantPoolValue::ARMConstantPoolValue(const GlobalValue *gv,
ARMCP::ARMCPModifier Modif)
: MachineConstantPoolValue((Type*)Type::getInt32Ty(gv->getContext())),
CVal(gv), S(NULL), LabelId(0), Kind(ARMCP::CPValue), PCAdjust(0),
Modifier(Modif), AddCurrentAddress(false) {}
const GlobalValue *ARMConstantPoolValue::getGV() const {
return dyn_cast_or_null<GlobalValue>(CVal);
}
const BlockAddress *ARMConstantPoolValue::getBlockAddress() const {
return dyn_cast_or_null<BlockAddress>(CVal);
}
const MachineBasicBlock *ARMConstantPoolValue::getMBB() const {
return MBB;
}
const char *ARMConstantPoolValue::getModifierText() const {
switch (Modifier) {
default: llvm_unreachable("Unknown modifier!");
// FIXME: Are these case sensitive? It'd be nice to lower-case all the
// strings if that's legal.
case ARMCP::no_modifier: return "none";
case ARMCP::TLSGD: return "tlsgd";
case ARMCP::GOT: return "GOT";
case ARMCP::GOTOFF: return "GOTOFF";
case ARMCP::GOTTPOFF: return "gottpoff";
case ARMCP::TPOFF: return "tpoff";
}
}
static bool CPV_streq(const char *S1, const char *S2) {
if (S1 == S2)
return true;
if (S1 && S2 && strcmp(S1, S2) == 0)
return true;
return false;
}
int ARMConstantPoolValue::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) {
ARMConstantPoolValue *CPV =
(ARMConstantPoolValue *)Constants[i].Val.MachineCPVal;
if (CPV->CVal == CVal &&
CPV->LabelId == LabelId &&
CPV->PCAdjust == PCAdjust &&
CPV_streq(CPV->S, S) &&
CPV->Modifier == Modifier)
return i;
}
}
return -1;
}
ARMConstantPoolValue::~ARMConstantPoolValue() {
free((void*)S);
}
void
ARMConstantPoolValue::addSelectionDAGCSEId(FoldingSetNodeID &ID) {
ID.AddPointer(CVal);
ID.AddPointer(S);
ID.AddInteger(LabelId);
ID.AddInteger(PCAdjust);
}
bool
ARMConstantPoolValue::hasSameValue(ARMConstantPoolValue *ACPV) {
if (ACPV->Kind == Kind &&
ACPV->CVal == CVal &&
ACPV->PCAdjust == PCAdjust &&
CPV_streq(ACPV->S, S) &&
ACPV->Modifier == Modifier) {
if (ACPV->LabelId == LabelId)
return true;
// Two PC relative constpool entries containing the same GV address or
// external symbols. FIXME: What about blockaddress?
if (Kind == ARMCP::CPValue || Kind == ARMCP::CPExtSymbol)
return true;
}
return false;
}
void ARMConstantPoolValue::dump() const {
errs() << " " << *this;
}
void ARMConstantPoolValue::print(raw_ostream &O) const {
if (CVal)
O << CVal->getName();
else if (MBB)
O << "";
else
O << S;
if (Modifier) O << "(" << getModifierText() << ")";
if (PCAdjust != 0) {
O << "-(LPC" << LabelId << "+" << (unsigned)PCAdjust;
if (AddCurrentAddress) O << "-.";
O << ")";
}
}
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