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*
create(VariantKind Kind,const MCExpr * Expr,MCContext & Ctx)17 ARMMCExpr::create(VariantKind Kind, const MCExpr *Expr,
18                        MCContext &Ctx) {
19   return new (Ctx) ARMMCExpr(Kind, Expr);
20 }
21 
printImpl(raw_ostream & OS,const MCAsmInfo * MAI) const22 void ARMMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
23   switch (Kind) {
24   default: llvm_unreachable("Invalid kind!");
25   case VK_ARM_HI16:
26     OS << ":upper16:";
27     break;
28   case VK_ARM_LO16:
29     OS << ":lower16:";
30     break;
31   case VK_ARM_HI_8_15:
32     OS << ":upper8_15:";
33     break;
34   case VK_ARM_HI_0_7:
35     OS << ":upper0_7:";
36     break;
37   case VK_ARM_LO_8_15:
38     OS << ":lower8_15:";
39     break;
40   case VK_ARM_LO_0_7:
41     OS << ":lower0_7:";
42     break;
43   }
44 
45   const MCExpr *Expr = getSubExpr();
46   if (Expr->getKind() != MCExpr::SymbolRef)
47     OS << '(';
48   Expr->print(OS, MAI);
49   if (Expr->getKind() != MCExpr::SymbolRef)
50     OS << ')';
51 }
52 
visitUsedExpr(MCStreamer & Streamer) const53 void ARMMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
54   Streamer.visitUsedExpr(*getSubExpr());
55 }
56