const MCSection *MCSymbol::AbsolutePseudoSection =
reinterpret_cast<const MCSection *>(1);
-/// ShouldQuoteIdentifier - Return true if the identifier \arg Str needs quotes
-/// for this assembler.
-static bool ShouldQuoteIdentifier(const StringRef &Str, const MCAsmInfo &MAI) {
- // If the assembler doesn't support quotes, never use them.
- if (!MAI.doesAllowQuotesInName())
+static bool isAcceptableChar(char C) {
+ if ((C < 'a' || C > 'z') &&
+ (C < 'A' || C > 'Z') &&
+ (C < '0' || C > '9') &&
+ C != '_' && C != '$' && C != '.' && C != '@')
return false;
+ return true;
+}
+
+static char HexDigit(int V) {
+ return V < 10 ? V+'0' : V+'A'-10;
+}
+
+static void MangleLetter(raw_ostream &OS, unsigned char C) {
+ OS << '_' << HexDigit(C >> 4) << HexDigit(C & 15) << '_';
+}
+
+/// NameNeedsEscaping - Return true if the identifier \arg Str needs quotes
+/// for this assembler.
+static bool NameNeedsEscaping(StringRef Str, const MCAsmInfo &MAI) {
+ assert(!Str.empty() && "Cannot create an empty MCSymbol");
- // If empty, we need quotes.
- if (Str.empty())
- return true;
-
- // If the first character is a number, we need quotes.
- if (Str[0] >= '0' && Str[0] <= '9')
+ // If the first character is a number and the target does not allow this, we
+ // need quotes.
+ if (!MAI.doesAllowNameToStartWithDigit() && Str[0] >= '0' && Str[0] <= '9')
return true;
// If any of the characters in the string is an unacceptable character, force
// quotes.
- for (unsigned i = 0, e = Str.size(); i != e; ++i) {
- char C = Str[i];
-
- if ((C < 'a' || C > 'z') &&
- (C < 'A' || C > 'Z') &&
- (C < '0' || C > '9') &&
- C != '_' && C != '$' && C != '.' && C != '@')
+ for (unsigned i = 0, e = Str.size(); i != e; ++i)
+ if (!isAcceptableChar(Str[i]))
return true;
- }
return false;
}
+static void PrintMangledName(raw_ostream &OS, StringRef Str,
+ const MCAsmInfo &MAI) {
+ // The first character is not allowed to be a number unless the target
+ // explicitly allows it.
+ if (!MAI.doesAllowNameToStartWithDigit() && Str[0] >= '0' && Str[0] <= '9') {
+ MangleLetter(OS, Str[0]);
+ Str = Str.substr(1);
+ }
+
+ for (unsigned i = 0, e = Str.size(); i != e; ++i) {
+ if (!isAcceptableChar(Str[i]))
+ MangleLetter(OS, Str[i]);
+ else
+ OS << Str[i];
+ }
+}
+
+/// PrintMangledQuotedName - On systems that support quoted symbols, we still
+/// have to escape some (obscure) characters like " and \n which would break the
+/// assembler's lexing.
+static void PrintMangledQuotedName(raw_ostream &OS, StringRef Str) {
+ OS << '"';
+
+ for (unsigned i = 0, e = Str.size(); i != e; ++i) {
+ if (Str[i] == '"')
+ OS << "_QQ_";
+ else if (Str[i] == '\n')
+ OS << "_NL_";
+ else
+ OS << Str[i];
+ }
+ OS << '"';
+}
+
+
void MCSymbol::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
- if (!MAI || ShouldQuoteIdentifier(getName(), *MAI))
- OS << '"' << getName() << '"';
- else
+ if (MAI == 0 || !NameNeedsEscaping(getName(), *MAI)) {
OS << getName();
+ return;
+ }
+
+ // On systems that do not allow quoted names, print with mangling.
+ if (!MAI->doesAllowQuotesInName())
+ return PrintMangledName(OS, getName(), *MAI);
+
+ // If the string contains a double quote or newline, we still have to mangle
+ // it.
+ if (getName().find('"') != std::string::npos ||
+ getName().find('\n') != std::string::npos)
+ return PrintMangledQuotedName(OS, getName());
+
+ OS << '"' << getName() << '"';
}
void MCSymbol::dump() const {