lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.cpp

   1 //===-- Nios2MCExpr.cpp - Nios2 specific MC expression classes ------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "Nios2.h"
  11
  12 #include "Nios2MCExpr.h"
  13 #include "llvm/MC/MCAsmInfo.h"
  14 #include "llvm/MC/MCAssembler.h"
  15 #include "llvm/MC/MCContext.h"
  16 #include "llvm/MC/MCObjectStreamer.h"
  17 #include "llvm/MC/MCSymbolELF.h"
  18
  19 using namespace llvm;
  20
  21 #define DEBUG_TYPE "nios2mcexpr"
  22
  23 const Nios2MCExpr *Nios2MCExpr::create(Nios2MCExpr::Nios2ExprKind Kind,
  24                                        const MCExpr *Expr, MCContext &Ctx) {
  25   return new (Ctx) Nios2MCExpr(Kind, Expr);
  26 }
  27
  28 const Nios2MCExpr *Nios2MCExpr::create(const MCSymbol *Symbol,
  29                                        Nios2MCExpr::Nios2ExprKind Kind,
  30                                        MCContext &Ctx) {
  31   const MCSymbolRefExpr *MCSym =
  32       MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_None, Ctx);
  33   return new (Ctx) Nios2MCExpr(Kind, MCSym);
  34 }
  35
  36 void Nios2MCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
  37
  38   switch (Kind) {
  39   case CEK_None:
  40   case CEK_Special:
  41     llvm_unreachable("CEK_None and CEK_Special are invalid");
  42     break;
  43   case CEK_ABS_HI:
  44     OS << "%hiadj";
  45     break;
  46   case CEK_ABS_LO:
  47     OS << "%lo";
  48     break;
  49   }
  50
  51   OS << '(';
  52   Expr->print(OS, MAI, true);
  53   OS << ')';
  54 }
  55
  56 bool Nios2MCExpr::evaluateAsRelocatableImpl(MCValue &Res,
  57                                             const MCAsmLayout *Layout,
  58                                             const MCFixup *Fixup) const {
  59   return getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup);
  60 }
  61
  62 void Nios2MCExpr::visitUsedExpr(MCStreamer &Streamer) const {
  63   Streamer.visitUsedExpr(*getSubExpr());
  64 }
  65
  66 void Nios2MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
  67   switch (getKind()) {
  68   case CEK_None:
  69   case CEK_Special:
  70     llvm_unreachable("CEK_None and CEK_Special are invalid");
  71     break;
  72   case CEK_ABS_HI:
  73   case CEK_ABS_LO:
  74     break;
  75   }
  76 }