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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) {
uint32_t CopyParamType = ParameterType;
int Bits = 0;
// If it is fixed type, we only need to increase the FixedParamNum, for
// the bit encode of fixed type is bit of zero, we do not need to change the
// ParamType.
if (Type == FixedType) {
++FixedParamNum;
return;
}
++FloatingPointParamNum;
for (int I = 0;
I < static_cast<int>(FloatingPointParamNum + FixedParamNum - 1); ++I) {
if (CopyParamType & XCOFF::TracebackTable::ParmTypeIsFloatingBit) {
// '10'b => floating point short parameter.
// '11'b => floating point long parameter.
CopyParamType <<= 2;
Bits += 2;
} else {
// '0'b => fixed parameter.
CopyParamType <<= 1;
++Bits;
}
}
assert(Type != FixedType && "FixedType should already be handled.");
if (Bits < 31)
ParameterType |= Type << (30 - Bits);
}
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