//===-- MipsMCExpr.cpp - Mips specific MC expression classes --------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "MipsMCExpr.h" #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCAssembler.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCObjectStreamer.h" using namespace llvm; #define DEBUG_TYPE "mipsmcexpr" bool MipsMCExpr::isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK, const MCBinaryExpr *BE) { switch (VK) { case MCSymbolRefExpr::VK_Mips_ABS_LO: case MCSymbolRefExpr::VK_Mips_ABS_HI: case MCSymbolRefExpr::VK_Mips_HIGHER: case MCSymbolRefExpr::VK_Mips_HIGHEST: break; default: return false; } // We support expressions of the form "(sym1 binop1 sym2) binop2 const", // where "binop2 const" is optional. if (isa<MCBinaryExpr>(BE->getLHS())) { if (!isa<MCConstantExpr>(BE->getRHS())) return false; BE = cast<MCBinaryExpr>(BE->getLHS()); } return (isa<MCSymbolRefExpr>(BE->getLHS()) && isa<MCSymbolRefExpr>(BE->getRHS())); } const MipsMCExpr* MipsMCExpr::Create(MCSymbolRefExpr::VariantKind VK, const MCExpr *Expr, MCContext &Ctx) { VariantKind Kind; switch (VK) { case MCSymbolRefExpr::VK_Mips_ABS_LO: Kind = VK_Mips_LO; break; case MCSymbolRefExpr::VK_Mips_ABS_HI: Kind = VK_Mips_HI; break; case MCSymbolRefExpr::VK_Mips_HIGHER: Kind = VK_Mips_HIGHER; break; case MCSymbolRefExpr::VK_Mips_HIGHEST: Kind = VK_Mips_HIGHEST; break; default: llvm_unreachable("Invalid kind!"); } return new (Ctx) MipsMCExpr(Kind, Expr); } void MipsMCExpr::PrintImpl(raw_ostream &OS) const { switch (Kind) { default: llvm_unreachable("Invalid kind!"); case VK_Mips_LO: OS << "%lo"; break; case VK_Mips_HI: OS << "%hi"; break; case VK_Mips_HIGHER: OS << "%higher"; break; case VK_Mips_HIGHEST: OS << "%highest"; break; } OS << '('; Expr->print(OS); OS << ')'; } bool MipsMCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout) const { return getSubExpr()->EvaluateAsRelocatable(Res, Layout); } void MipsMCExpr::visitUsedExpr(MCStreamer &Streamer) const { Streamer.visitUsedExpr(*getSubExpr()); }