ARMMCExpr.cpp

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//===-- ARMMCExpr.cpp - ARM specific MC expression classes ----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include "ARMMCExpr.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCStreamer.h"
using namespace llvm;
 
#define DEBUG_TYPE "armmcexpr"
 
const ARMMCExpr*
ARMMCExpr::create(VariantKind Kind, const MCExpr *Expr,
                       MCContext &Ctx) {
  return new (Ctx) ARMMCExpr(Kind, Expr);
}
 
void ARMMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
  switch (Kind) {
  default: llvm_unreachable("Invalid kind!");
  case VK_ARM_HI16: OS << ":upper16:"; break;
  case VK_ARM_LO16: OS << ":lower16:"; break;
  }
 
  const MCExpr *Expr = getSubExpr();
  if (Expr->getKind() != MCExpr::SymbolRef)
    OS << '(';
  Expr->print(OS, MAI);
  if (Expr->getKind() != MCExpr::SymbolRef)
    OS << ')';
}
 
void ARMMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
  Streamer.visitUsedExpr(*getSubExpr());
}