100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
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//===-- PPCMachineFunctionInfo.cpp - Private data used for PowerPC --------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "PPCMachineFunctionInfo.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/BinaryFormat/XCOFF.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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static cl::opt<bool> PPCDisableNonVolatileCR(
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"ppc-disable-non-volatile-cr",
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cl::desc("Disable the use of non-volatile CR register fields"),
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cl::init(false), cl::Hidden);
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void PPCFunctionInfo::anchor() {}
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PPCFunctionInfo::PPCFunctionInfo(const MachineFunction &MF)
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: DisableNonVolatileCR(PPCDisableNonVolatileCR) {}
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MCSymbol *PPCFunctionInfo::getPICOffsetSymbol(MachineFunction &MF) const {
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const DataLayout &DL = MF.getDataLayout();
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return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
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Twine(MF.getFunctionNumber()) +
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"$poff");
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}
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MCSymbol *PPCFunctionInfo::getGlobalEPSymbol(MachineFunction &MF) const {
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const DataLayout &DL = MF.getDataLayout();
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return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
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"func_gep" +
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Twine(MF.getFunctionNumber()));
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}
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MCSymbol *PPCFunctionInfo::getLocalEPSymbol(MachineFunction &MF) const {
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const DataLayout &DL = MF.getDataLayout();
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return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
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"func_lep" +
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Twine(MF.getFunctionNumber()));
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}
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MCSymbol *PPCFunctionInfo::getTOCOffsetSymbol(MachineFunction &MF) const {
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const DataLayout &DL = MF.getDataLayout();
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return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
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"func_toc" +
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Twine(MF.getFunctionNumber()));
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}
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bool PPCFunctionInfo::isLiveInSExt(Register VReg) const {
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for (const std::pair<Register, ISD::ArgFlagsTy> &LiveIn : LiveInAttrs)
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if (LiveIn.first == VReg)
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return LiveIn.second.isSExt();
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return false;
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}
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bool PPCFunctionInfo::isLiveInZExt(Register VReg) const {
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for (const std::pair<Register, ISD::ArgFlagsTy> &LiveIn : LiveInAttrs)
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if (LiveIn.first == VReg)
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return LiveIn.second.isZExt();
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return false;
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}
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void PPCFunctionInfo::appendParameterType(ParamType Type) {
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uint32_t CopyParamType = ParameterType;
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int Bits = 0;
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// If it is fixed type, we only need to increase the FixedParamNum, for
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// the bit encode of fixed type is bit of zero, we do not need to change the
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// ParamType.
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if (Type == FixedType) {
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++FixedParamNum;
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return;
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}
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++FloatingPointParamNum;
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for (int I = 0;
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I < static_cast<int>(FloatingPointParamNum + FixedParamNum - 1); ++I) {
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if (CopyParamType & XCOFF::TracebackTable::ParmTypeIsFloatingBit) {
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// '10'b => floating point short parameter.
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// '11'b => floating point long parameter.
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CopyParamType <<= 2;
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Bits += 2;
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} else {
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// '0'b => fixed parameter.
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CopyParamType <<= 1;
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++Bits;
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}
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}
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assert(Type != FixedType && "FixedType should already be handled.");
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if (Bits < 31)
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ParameterType |= Type << (30 - Bits);
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}
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