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//===-- PPCMachineFunctionInfo.cpp - Private data used for PowerPC --------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "PPCMachineFunctionInfo.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/XCOFF.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
static cl::opt<bool> PPCDisableNonVolatileCR(
"ppc-disable-non-volatile-cr",
cl::desc("Disable the use of non-volatile CR register fields"),
cl::init(false), cl::Hidden);
void PPCFunctionInfo::anchor() {}
PPCFunctionInfo::PPCFunctionInfo(const MachineFunction &MF)
: DisableNonVolatileCR(PPCDisableNonVolatileCR) {}
MCSymbol *PPCFunctionInfo::getPICOffsetSymbol(MachineFunction &MF) const {
const DataLayout &DL = MF.getDataLayout();
return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
Twine(MF.getFunctionNumber()) +
"$poff");
}
MCSymbol *PPCFunctionInfo::getGlobalEPSymbol(MachineFunction &MF) const {
const DataLayout &DL = MF.getDataLayout();
return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
"func_gep" +
Twine(MF.getFunctionNumber()));
}
MCSymbol *PPCFunctionInfo::getLocalEPSymbol(MachineFunction &MF) const {
const DataLayout &DL = MF.getDataLayout();
return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
"func_lep" +
Twine(MF.getFunctionNumber()));
}
MCSymbol *PPCFunctionInfo::getTOCOffsetSymbol(MachineFunction &MF) const {
const DataLayout &DL = MF.getDataLayout();
return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
"func_toc" +
Twine(MF.getFunctionNumber()));
}
bool PPCFunctionInfo::isLiveInSExt(Register VReg) const {
for (const std::pair<Register, ISD::ArgFlagsTy> &LiveIn : LiveInAttrs)
if (LiveIn.first == VReg)
return LiveIn.second.isSExt();
return false;
}
bool PPCFunctionInfo::isLiveInZExt(Register VReg) const {
for (const std::pair<Register, ISD::ArgFlagsTy> &LiveIn : LiveInAttrs)
if (LiveIn.first == VReg)
return LiveIn.second.isZExt();
return false;
}
void PPCFunctionInfo::appendParameterType(ParamType Type) {
ParamtersType.push_back(Type);
switch (Type) {
case FixedType:
++FixedParmsNum;
return;
case ShortFloatingPoint:
case LongFloatingPoint:
++FloatingParmsNum;
return;
case VectorChar:
case VectorShort:
case VectorInt:
case VectorFloat:
++VectorParmsNum;
return;
}
llvm_unreachable("Error ParamType type.");
}
uint32_t PPCFunctionInfo::getVecExtParmsType() const {
uint32_t VectExtParamInfo = 0;
unsigned ShiftBits = 32 - XCOFF::TracebackTable::WidthOfParamType;
int Bits = 0;
if (!hasVectorParms())
return 0;
for (const auto &Elt : ParamtersType) {
switch (Elt) {
case VectorChar:
VectExtParamInfo <<= XCOFF::TracebackTable::WidthOfParamType;
VectExtParamInfo |=
XCOFF::TracebackTable::ParmTypeIsVectorCharBit >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
case VectorShort:
VectExtParamInfo <<= XCOFF::TracebackTable::WidthOfParamType;
VectExtParamInfo |=
XCOFF::TracebackTable::ParmTypeIsVectorShortBit >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
case VectorInt:
VectExtParamInfo <<= XCOFF::TracebackTable::WidthOfParamType;
VectExtParamInfo |=
XCOFF::TracebackTable::ParmTypeIsVectorIntBit >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
case VectorFloat:
VectExtParamInfo <<= XCOFF::TracebackTable::WidthOfParamType;
VectExtParamInfo |=
XCOFF::TracebackTable::ParmTypeIsVectorFloatBit >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
default:
break;
}
// There are only 32bits in the VectExtParamInfo.
if (Bits >= 32)
break;
}
return Bits < 32 ? VectExtParamInfo << (32 - Bits) : VectExtParamInfo;
}
uint32_t PPCFunctionInfo::getParmsType() const {
uint32_t ParamsTypeInfo = 0;
unsigned ShiftBits = 32 - XCOFF::TracebackTable::WidthOfParamType;
int Bits = 0;
for (const auto &Elt : ParamtersType) {
if (Bits > 31 || (Bits > 30 && (Elt != FixedType || hasVectorParms())))
break;
switch (Elt) {
case FixedType:
if (hasVectorParms()) {
//'00' ==> fixed parameter if HasVectorParms is true.
ParamsTypeInfo <<= XCOFF::TracebackTable::WidthOfParamType;
ParamsTypeInfo |=
XCOFF::TracebackTable::ParmTypeIsFixedBits >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
} else {
//'0' ==> fixed parameter if HasVectorParms is false.
ParamsTypeInfo <<= 1;
++Bits;
}
break;
case ShortFloatingPoint:
// '10'b => floating point short parameter.
ParamsTypeInfo <<= XCOFF::TracebackTable::WidthOfParamType;
ParamsTypeInfo |=
XCOFF::TracebackTable::ParmTypeIsFloatingBits >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
case LongFloatingPoint:
// '11'b => floating point long parameter.
ParamsTypeInfo <<= XCOFF::TracebackTable::WidthOfParamType;
ParamsTypeInfo |=
XCOFF::TracebackTable::ParmTypeIsDoubleBits >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
case VectorChar:
case VectorShort:
case VectorInt:
case VectorFloat:
// '01' ==> vector parameter
ParamsTypeInfo <<= XCOFF::TracebackTable::WidthOfParamType;
ParamsTypeInfo |=
XCOFF::TracebackTable::ParmTypeIsVectorBits >> ShiftBits;
Bits += XCOFF::TracebackTable::WidthOfParamType;
break;
}
}
return Bits < 32 ? ParamsTypeInfo << (32 - Bits) : ParamsTypeInfo;
}
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