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 
16 using namespace llvm;
17 
print(raw_ostream & OS) const18 void MCValue::print(raw_ostream &OS) 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   OS << *getSymA();
30 
31   if (getSymB()) {
32     OS << " - ";
33     OS << *getSymB();
34   }
35 
36   if (getConstant())
37     OS << " + " << getConstant();
38 }
39 
40 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
dump() const41 void MCValue::dump() const {
42   print(dbgs());
43 }
44 #endif
45 
getAccessVariant() const46 MCSymbolRefExpr::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