lib/MC/MCValue.cpp

   1 //===- lib/MC/MCValue.cpp - MCValue implementation ------------------------===//
   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 "llvm/MC/MCValue.h"
  10 #include "llvm/Config/llvm-config.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
  18 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)
  41 LLVM_DUMP_METHOD void MCValue::dump() const {
  42   print(dbgs());
  43 }
  44 #endif
  45
  46 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 }