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09d6419647
An option is added for PowerPC to disable use of non-volatile CR register fields and avoid CR spilling in the prologue. Differential Revision: https://reviews.llvm.org/D69835
66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
//===-- 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/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(MachineFunction &MF)
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: DisableNonVolatileCR(PPCDisableNonVolatileCR), MF(MF) {}
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MCSymbol *PPCFunctionInfo::getPICOffsetSymbol() 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() 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() 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() 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(unsigned VReg) const {
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for (const std::pair<unsigned, 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(unsigned VReg) const {
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for (const std::pair<unsigned, 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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