1//===- lib/MC/MCValue.cpp - MCValue implementation ------------------------===//
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 "llvm/MC/MCValue.h"
11#include "llvm/MC/MCExpr.h"
12#include "llvm/Support/Debug.h"
13#include "llvm/Support/ErrorHandling.h"
14#include "llvm/Support/raw_ostream.h"
15
16using namespace llvm;
17
18void MCValue::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
19  if (isAbsolute()) {
20    OS << getConstant();
21    return;
22  }
23
24  // FIXME: prints as a number, which isn't ideal. But the meaning will be
25  // target-specific anyway.
26  if (getRefKind())
27    OS << ':' << getRefKind() <<  ':';
28
29  getSymA()->print(OS);
30
31  if (getSymB()) {
32    OS << " - ";
33    getSymB()->print(OS);
34  }
35
36  if (getConstant())
37    OS << " + " << getConstant();
38}
39
40#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
41void MCValue::dump() const {
42  print(dbgs(), nullptr);
43}
44#endif
45
46MCSymbolRefExpr::VariantKind MCValue::getAccessVariant() const {
47  const MCSymbolRefExpr *B = getSymB();
48  if (B) {
49    if (B->getKind() != MCSymbolRefExpr::VK_None)
50      llvm_unreachable("unsupported");
51  }
52
53  const MCSymbolRefExpr *A = getSymA();
54  if (!A)
55    return MCSymbolRefExpr::VK_None;
56
57  MCSymbolRefExpr::VariantKind Kind = A->getKind();
58  if (Kind == MCSymbolRefExpr::VK_WEAKREF)
59    return MCSymbolRefExpr::VK_None;
60  return Kind;
61}
62