lib/Target/Hexagon/MCTargetDesc/HexagonMCExpr.cpp

   1 //===-- HexagonMCExpr.cpp - Hexagon specific MC expression classes
   2 //----------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "HexagonMCExpr.h"
  11 #include "llvm/BinaryFormat/ELF.h"
  12 #include "llvm/MC/MCContext.h"
  13 #include "llvm/MC/MCStreamer.h"
  14 #include "llvm/MC/MCSymbolELF.h"
  15 #include "llvm/MC/MCValue.h"
  16 #include "llvm/Support/raw_ostream.h"
  17
  18 using namespace llvm;
  19
  20 #define DEBUG_TYPE "hexagon-mcexpr"
  21
  22 HexagonMCExpr *HexagonMCExpr::create(MCExpr const *Expr, MCContext &Ctx) {
  23   return new (Ctx) HexagonMCExpr(Expr);
  24 }
  25
  26 bool HexagonMCExpr::evaluateAsRelocatableImpl(MCValue &Res,
  27                                               MCAsmLayout const *Layout,
  28                                               MCFixup const *Fixup) const {
  29   return Expr->evaluateAsRelocatable(Res, Layout, Fixup);
  30 }
  31
  32 void HexagonMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
  33   Streamer.visitUsedExpr(*Expr);
  34 }
  35
  36 MCFragment *llvm::HexagonMCExpr::findAssociatedFragment() const {
  37   return Expr->findAssociatedFragment();
  38 }
  39
  40 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
  41   switch (Expr->getKind()) {
  42   case MCExpr::Target:
  43     llvm_unreachable("Cannot handle nested target MCExpr");
  44     break;
  45   case MCExpr::Constant:
  46     break;
  47
  48   case MCExpr::Binary: {
  49     const MCBinaryExpr *be = cast<MCBinaryExpr>(Expr);
  50     fixELFSymbolsInTLSFixupsImpl(be->getLHS(), Asm);
  51     fixELFSymbolsInTLSFixupsImpl(be->getRHS(), Asm);
  52     break;
  53   }
  54   case MCExpr::SymbolRef: {
  55     const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(Expr);
  56     switch (symRef.getKind()) {
  57     default:
  58       return;
  59     case MCSymbolRefExpr::VK_Hexagon_GD_GOT:
  60     case MCSymbolRefExpr::VK_Hexagon_LD_GOT:
  61     case MCSymbolRefExpr::VK_Hexagon_GD_PLT:
  62     case MCSymbolRefExpr::VK_Hexagon_LD_PLT:
  63     case MCSymbolRefExpr::VK_Hexagon_IE:
  64     case MCSymbolRefExpr::VK_Hexagon_IE_GOT:
  65     case MCSymbolRefExpr::VK_TPREL:
  66       break;
  67     }
  68     cast<MCSymbolELF>(symRef.getSymbol()).setType(ELF::STT_TLS);
  69     break;
  70   }
  71   case MCExpr::Unary:
  72     fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
  73     break;
  74   }
  75 }
  76
  77 void HexagonMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
  78   auto expr = getExpr();
  79   fixELFSymbolsInTLSFixupsImpl(expr, Asm);
  80 }
  81
  82 MCExpr const *HexagonMCExpr::getExpr() const { return Expr; }
  83
  84 void HexagonMCExpr::setMustExtend(bool Val) {
  85   assert((!Val || !MustNotExtend) && "Extension contradiction");
  86   MustExtend = Val;
  87 }
  88
  89 bool HexagonMCExpr::mustExtend() const { return MustExtend; }
  90 void HexagonMCExpr::setMustNotExtend(bool Val) {
  91   assert((!Val || !MustExtend) && "Extension contradiction");
  92   MustNotExtend = Val;
  93 }
  94 bool HexagonMCExpr::mustNotExtend() const { return MustNotExtend; }
  95
  96 bool HexagonMCExpr::s27_2_reloc() const { return S27_2_reloc; }
  97 void HexagonMCExpr::setS27_2_reloc(bool Val) {
  98   S27_2_reloc = Val;
  99 }
 100
 101 bool HexagonMCExpr::classof(MCExpr const *E) {
 102   return E->getKind() == MCExpr::Target;
 103 }
 104
 105 HexagonMCExpr::HexagonMCExpr(MCExpr const *Expr)
 106     : Expr(Expr), MustNotExtend(false), MustExtend(false), S27_2_reloc(false),
 107       SignMismatch(false) {}
 108
 109 void HexagonMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
 110   Expr->print(OS, MAI);
 111 }
 112
 113 void HexagonMCExpr::setSignMismatch(bool Val) {
 114   SignMismatch = Val;
 115 }
 116
 117 bool HexagonMCExpr::signMismatch() const {
 118   return SignMismatch;
 119 }