ARMMCExpr.cpp revision cd81d94322a39503e4a3e87b6ee03d4fcb3465fb 
1//===-- ARMMCExpr.cpp - ARM 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 "ARMMCExpr.h"
11#include "llvm/MC/MCAssembler.h"
12#include "llvm/MC/MCContext.h"
13using namespace llvm;
14
15#define DEBUG_TYPE "armmcexpr"
16
17const ARMMCExpr*
18ARMMCExpr::Create(VariantKind Kind, const MCExpr *Expr,
19                       MCContext &Ctx) {
20  return new (Ctx) ARMMCExpr(Kind, Expr);
21}
22
23void ARMMCExpr::PrintImpl(raw_ostream &OS) const {
24  switch (Kind) {
25  default: llvm_unreachable("Invalid kind!");
26  case VK_ARM_HI16: OS << ":upper16:"; break;
27  case VK_ARM_LO16: OS << ":lower16:"; break;
28  }
29
30  const MCExpr *Expr = getSubExpr();
31  if (Expr->getKind() != MCExpr::SymbolRef)
32    OS << '(';
33  Expr->print(OS);
34  if (Expr->getKind() != MCExpr::SymbolRef)
35    OS << ')';
36}
37
38bool
39ARMMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
40                                     const MCAsmLayout *Layout) const {
41  return false;
42}
43
44void ARMMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
45  Streamer.visitUsedExpr(*getSubExpr());
46}
47