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Further MCize ARM constant pool values. This allows basic PIC references for

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object file emission.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118601 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-11-09 18:45:04 +00:00
parent e0ee08e367
commit 5df08d8f55
1 changed files with 83 additions and 67 deletions
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150
lib/Target/ARM/ARMAsmPrinter.cpp
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@ -227,73 +227,7 @@ namespace {
/// EmitMachineConstantPoolValue - Print a machine constantpool value to
/// the .s file.
virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
SmallString<128> Str;
raw_svector_ostream OS(Str);
if (ACPV->isLSDA()) {
OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
} else if (ACPV->isBlockAddress()) {
OS << *GetBlockAddressSymbol(ACPV->getBlockAddress());
} else if (ACPV->isGlobalValue()) {
const GlobalValue *GV = ACPV->getGV();
bool isIndirect = Subtarget->isTargetDarwin() &&
Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
if (!isIndirect)
OS << *Mang->getSymbol(GV);
else {
// FIXME: Remove this when Darwin transition to @GOT like syntax.
MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
OS << *Sym;
MachineModuleInfoMachO &MMIMachO =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
MachineModuleInfoImpl::StubValueTy &StubSym =
GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(Sym) :
MMIMachO.getGVStubEntry(Sym);
if (StubSym.getPointer() == 0)
StubSym = MachineModuleInfoImpl::
StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
}
} else {
assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
OS << *GetExternalSymbolSymbol(ACPV->getSymbol());
}
// Create an MCSymbol for the reference.
MCSymbol *MCSym = OutContext.GetOrCreateSymbol(OS.str());
const MCExpr *Expr = MCSymbolRefExpr::Create(MCSym, OutContext);
// FIXME: Model the whole expression an an MCExpr and we can get rid
// of this hasRawTextSupport() clause and just do an EmitValue().
if (OutStreamer.hasRawTextSupport()) {
if (ACPV->hasModifier()) OS << "(" << ACPV->getModifier() << ")";
if (ACPV->getPCAdjustment() != 0) {
OS << "-(" << MAI->getPrivateGlobalPrefix() << "PC"
<< getFunctionNumber() << "_" << ACPV->getLabelId()
<< "+" << (unsigned)ACPV->getPCAdjustment();
if (ACPV->mustAddCurrentAddress())
OS << "-.";
OS << ')';
}
const char *DataDirective = 0;
switch (Size) {
case 1: DataDirective = MAI->getData8bitsDirective(0); break;
case 2: DataDirective = MAI->getData16bitsDirective(0); break;
case 4: DataDirective = MAI->getData32bitsDirective(0); break;
default: assert(0 && "Unknown CPV size");
}
Twine Text(DataDirective, OS.str());
OutStreamer.EmitRawText(Text);
} else {
assert(!ACPV->hasModifier() && ACPV->getPCAdjustment() == 0 &&
"ARM binary streamer of non-trivial constant pool value!");
OutStreamer.EmitValue(Expr, Size);
}
}
virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
};
} // end of anonymous namespace
@ -669,6 +603,88 @@ static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
return Label;
}
void ARMAsmPrinter::
EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
SmallString<128> Str;
raw_svector_ostream OS(Str);
if (ACPV->isLSDA()) {
OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
} else if (ACPV->isBlockAddress()) {
OS << *GetBlockAddressSymbol(ACPV->getBlockAddress());
} else if (ACPV->isGlobalValue()) {
const GlobalValue *GV = ACPV->getGV();
bool isIndirect = Subtarget->isTargetDarwin() &&
Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
if (!isIndirect)
OS << *Mang->getSymbol(GV);
else {
// FIXME: Remove this when Darwin transition to @GOT like syntax.
MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
OS << *Sym;
MachineModuleInfoMachO &MMIMachO =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
MachineModuleInfoImpl::StubValueTy &StubSym =
GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(Sym) :
MMIMachO.getGVStubEntry(Sym);
if (StubSym.getPointer() == 0)
StubSym = MachineModuleInfoImpl::
StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
}
} else {
assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
OS << *GetExternalSymbolSymbol(ACPV->getSymbol());
}
// Create an MCSymbol for the reference.
MCSymbol *MCSym = OutContext.GetOrCreateSymbol(OS.str());
const MCExpr *Expr = MCSymbolRefExpr::Create(MCSym, OutContext);
// FIXME: Model the whole expression an an MCExpr and we can get rid
// of this hasRawTextSupport() clause and just do an EmitValue().
if (OutStreamer.hasRawTextSupport()) {
if (ACPV->hasModifier()) OS << "(" << ACPV->getModifier() << ")";
if (ACPV->getPCAdjustment() != 0) {
OS << "-(" << MAI->getPrivateGlobalPrefix() << "PC"
<< getFunctionNumber() << "_" << ACPV->getLabelId()
<< "+" << (unsigned)ACPV->getPCAdjustment();
if (ACPV->mustAddCurrentAddress())
OS << "-.";
OS << ')';
}
const char *DataDirective = 0;
switch (Size) {
case 1: DataDirective = MAI->getData8bitsDirective(0); break;
case 2: DataDirective = MAI->getData16bitsDirective(0); break;
case 4: DataDirective = MAI->getData32bitsDirective(0); break;
default: assert(0 && "Unknown CPV size");
}
Twine Text(DataDirective, OS.str());
OutStreamer.EmitRawText(Text);
} else {
assert(!ACPV->hasModifier() && !ACPV->mustAddCurrentAddress() &&
"ARM binary streamer of non-trivial constant pool value!");
if (ACPV->getPCAdjustment()) {
MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
getFunctionNumber(),
ACPV->getLabelId(),
OutContext);
const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
PCRelExpr =
MCBinaryExpr::CreateAdd(PCRelExpr,
MCConstantExpr::Create(ACPV->getPCAdjustment(),
OutContext),
OutContext);
Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
}
OutStreamer.EmitValue(Expr, Size);
}
}
void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
unsigned Opcode = MI->getOpcode();
int OpNum = 1;