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1 //===-- HexagonMCExpr.cpp - Hexagon specific MC expression classes
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2 //----------===//
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3 //
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4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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5 // See https://llvm.org/LICENSE.txt for license information.
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6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "HexagonMCExpr.h"
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11 #include "llvm/BinaryFormat/ELF.h"
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12 #include "llvm/MC/MCContext.h"
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13 #include "llvm/MC/MCStreamer.h"
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14 #include "llvm/MC/MCSymbolELF.h"
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15 #include "llvm/MC/MCValue.h"
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236
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16 #include "llvm/Support/Casting.h"
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150
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17 #include "llvm/Support/raw_ostream.h"
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18
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19 using namespace llvm;
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20
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21 #define DEBUG_TYPE "hexagon-mcexpr"
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22
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23 HexagonMCExpr *HexagonMCExpr::create(MCExpr const *Expr, MCContext &Ctx) {
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24 return new (Ctx) HexagonMCExpr(Expr);
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25 }
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26
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27 bool HexagonMCExpr::evaluateAsRelocatableImpl(MCValue &Res,
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28 MCAsmLayout const *Layout,
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29 MCFixup const *Fixup) const {
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30 return Expr->evaluateAsRelocatable(Res, Layout, Fixup);
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31 }
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32
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33 void HexagonMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
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34 Streamer.visitUsedExpr(*Expr);
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35 }
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36
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37 MCFragment *llvm::HexagonMCExpr::findAssociatedFragment() const {
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38 return Expr->findAssociatedFragment();
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39 }
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40
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41 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
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42 switch (Expr->getKind()) {
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43 case MCExpr::Target:
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44 llvm_unreachable("Cannot handle nested target MCExpr");
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45 break;
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46 case MCExpr::Constant:
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47 break;
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48
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49 case MCExpr::Binary: {
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50 const MCBinaryExpr *be = cast<MCBinaryExpr>(Expr);
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51 fixELFSymbolsInTLSFixupsImpl(be->getLHS(), Asm);
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52 fixELFSymbolsInTLSFixupsImpl(be->getRHS(), Asm);
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53 break;
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54 }
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55 case MCExpr::SymbolRef: {
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56 const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(Expr);
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57 switch (symRef.getKind()) {
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58 default:
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59 return;
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60 case MCSymbolRefExpr::VK_Hexagon_GD_GOT:
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61 case MCSymbolRefExpr::VK_Hexagon_LD_GOT:
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62 case MCSymbolRefExpr::VK_Hexagon_GD_PLT:
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63 case MCSymbolRefExpr::VK_Hexagon_LD_PLT:
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64 case MCSymbolRefExpr::VK_Hexagon_IE:
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65 case MCSymbolRefExpr::VK_Hexagon_IE_GOT:
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66 case MCSymbolRefExpr::VK_TPREL:
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67 break;
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68 }
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69 cast<MCSymbolELF>(symRef.getSymbol()).setType(ELF::STT_TLS);
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70 break;
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71 }
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72 case MCExpr::Unary:
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73 fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
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74 break;
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75 }
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76 }
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77
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78 void HexagonMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
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79 auto expr = getExpr();
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80 fixELFSymbolsInTLSFixupsImpl(expr, Asm);
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81 }
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82
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83 MCExpr const *HexagonMCExpr::getExpr() const { return Expr; }
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84
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85 void HexagonMCExpr::setMustExtend(bool Val) {
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86 assert((!Val || !MustNotExtend) && "Extension contradiction");
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87 MustExtend = Val;
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88 }
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89
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90 bool HexagonMCExpr::mustExtend() const { return MustExtend; }
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91 void HexagonMCExpr::setMustNotExtend(bool Val) {
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92 assert((!Val || !MustExtend) && "Extension contradiction");
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93 MustNotExtend = Val;
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94 }
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95 bool HexagonMCExpr::mustNotExtend() const { return MustNotExtend; }
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96
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97 bool HexagonMCExpr::s27_2_reloc() const { return S27_2_reloc; }
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98 void HexagonMCExpr::setS27_2_reloc(bool Val) {
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99 S27_2_reloc = Val;
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100 }
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101
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102 HexagonMCExpr::HexagonMCExpr(MCExpr const *Expr)
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103 : Expr(Expr), MustNotExtend(false), MustExtend(false), S27_2_reloc(false),
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104 SignMismatch(false) {}
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105
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106 void HexagonMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
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107 Expr->print(OS, MAI);
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108 }
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109
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110 void HexagonMCExpr::setSignMismatch(bool Val) {
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111 SignMismatch = Val;
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112 }
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113
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114 bool HexagonMCExpr::signMismatch() const {
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115 return SignMismatch;
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116 }
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