1 //===-- PPCMachineFunctionInfo.cpp - Private data used for PowerPC --------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "PPCMachineFunctionInfo.h"
10 #include "llvm/ADT/Twine.h"
11 #include "llvm/IR/DataLayout.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/Support/CommandLine.h"
14 
15 using namespace llvm;
16 static cl::opt<bool> PPCDisableNonVolatileCR(
17     "ppc-disable-non-volatile-cr",
18     cl::desc("Disable the use of non-volatile CR register fields"),
19     cl::init(false), cl::Hidden);
20 
anchor()21 void PPCFunctionInfo::anchor() {}
PPCFunctionInfo(const MachineFunction & MF)22 PPCFunctionInfo::PPCFunctionInfo(const MachineFunction &MF)
23     : DisableNonVolatileCR(PPCDisableNonVolatileCR) {}
24 
getPICOffsetSymbol(MachineFunction & MF) const25 MCSymbol *PPCFunctionInfo::getPICOffsetSymbol(MachineFunction &MF) const {
26   const DataLayout &DL = MF.getDataLayout();
27   return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
28                                            Twine(MF.getFunctionNumber()) +
29                                            "$poff");
30 }
31 
getGlobalEPSymbol(MachineFunction & MF) const32 MCSymbol *PPCFunctionInfo::getGlobalEPSymbol(MachineFunction &MF) const {
33   const DataLayout &DL = MF.getDataLayout();
34   return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
35                                            "func_gep" +
36                                            Twine(MF.getFunctionNumber()));
37 }
38 
getLocalEPSymbol(MachineFunction & MF) const39 MCSymbol *PPCFunctionInfo::getLocalEPSymbol(MachineFunction &MF) const {
40   const DataLayout &DL = MF.getDataLayout();
41   return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
42                                            "func_lep" +
43                                            Twine(MF.getFunctionNumber()));
44 }
45 
getTOCOffsetSymbol(MachineFunction & MF) const46 MCSymbol *PPCFunctionInfo::getTOCOffsetSymbol(MachineFunction &MF) const {
47   const DataLayout &DL = MF.getDataLayout();
48   return MF.getContext().getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
49                                            "func_toc" +
50                                            Twine(MF.getFunctionNumber()));
51 }
52 
isLiveInSExt(Register VReg) const53 bool PPCFunctionInfo::isLiveInSExt(Register VReg) const {
54   for (const std::pair<Register, ISD::ArgFlagsTy> &LiveIn : LiveInAttrs)
55     if (LiveIn.first == VReg)
56       return LiveIn.second.isSExt();
57   return false;
58 }
59 
isLiveInZExt(Register VReg) const60 bool PPCFunctionInfo::isLiveInZExt(Register VReg) const {
61   for (const std::pair<Register, ISD::ArgFlagsTy> &LiveIn : LiveInAttrs)
62     if (LiveIn.first == VReg)
63       return LiveIn.second.isZExt();
64   return false;
65 }
66