1 //===-- ARMMCExpr.cpp - ARM specific MC expression classes ----------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "ARMMCExpr.h"
10 #include "llvm/MC/MCContext.h"
11 #include "llvm/MC/MCStreamer.h"
12 using namespace llvm;
13 
14 #define DEBUG_TYPE "armmcexpr"
15 
16 const ARMMCExpr*
17 ARMMCExpr::create(VariantKind Kind, const MCExpr *Expr,
18                        MCContext &Ctx) {
19   return new (Ctx) ARMMCExpr(Kind, Expr);
20 }
21 
22 void ARMMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
23   switch (Kind) {
24   default: llvm_unreachable("Invalid kind!");
25   case VK_ARM_HI16: OS << ":upper16:"; break;
26   case VK_ARM_LO16: OS << ":lower16:"; break;
27   }
28 
29   const MCExpr *Expr = getSubExpr();
30   if (Expr->getKind() != MCExpr::SymbolRef)
31     OS << '(';
32   Expr->print(OS, MAI);
33   if (Expr->getKind() != MCExpr::SymbolRef)
34     OS << ')';
35 }
36 
37 void ARMMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
38   Streamer.visitUsedExpr(*getSubExpr());
39 }
40