lib/MC/MCSymbol.cpp

   1 //===- lib/MC/MCSymbol.cpp - MCSymbol 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/MCSymbol.h"
  11 #include "llvm/MC/MCAsmInfo.h"
  12 #include "llvm/Support/raw_ostream.h"
  13 using namespace llvm;
  14
  15 // Sentinel value for the absolute pseudo section.
  16 const MCSection *MCSymbol::AbsolutePseudoSection =
  17   reinterpret_cast<const MCSection *>(1);
  18
  19 /// ShouldQuoteIdentifier - Return true if the identifier \arg Str needs quotes
  20 /// for this assembler.
  21 static bool ShouldQuoteIdentifier(const StringRef &Str, const MCAsmInfo &MAI) {
  22   // If the assembler doesn't support quotes, never use them.
  23   if (!MAI.doesAllowQuotesInName())
  24     return false;
  25
  26   // If empty, we need quotes.
  27   if (Str.empty())
  28     return true;
  29
  30   // If the first character is a number, we need quotes.
  31   if (Str[0] >= '0' && Str[0] <= '9')
  32     return true;
  33
  34   // If any of the characters in the string is an unacceptable character, force
  35   // quotes.
  36   for (unsigned i = 0, e = Str.size(); i != e; ++i) {
  37     char C = Str[i];
  38
  39     if ((C < 'a' || C > 'z') &&
  40         (C < 'A' || C > 'Z') &&
  41         (C < '0' || C > '9') &&
  42         C != '_' && C != '$' && C != '.' && C != '@')
  43       return true;
  44   }
  45   return false;
  46 }
  47
  48 void MCSymbol::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
  49   if (!MAI || ShouldQuoteIdentifier(getName(), *MAI))
  50     OS << '"' << getName() << '"';
  51   else
  52     OS << getName();
  53 }
  54
  55 void MCSymbol::dump() const {
  56   print(errs(), 0);
  57 }