[llvm-commits] [llvm] r81682 - in /llvm/trunk/lib: MC/MCSymbol.cpp VMCore/Mangler.cpp
Chris Lattner
sabre at nondot.org
Sun Sep 13 11:04:46 PDT 2009
Author: lattner
Date: Sun Sep 13 13:04:46 2009
New Revision: 81682
URL: http://llvm.org/viewvc/llvm-project?rev=81682&view=rev
Log:
Make the MC symbol printer and llvm::Mangler exactly agree on mangling
for systems that don't support quoting (PR4966).
Modified:
llvm/trunk/lib/MC/MCSymbol.cpp
llvm/trunk/lib/VMCore/Mangler.cpp
Modified: llvm/trunk/lib/MC/MCSymbol.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCSymbol.cpp?rev=81682&r1=81681&r2=81682&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCSymbol.cpp (original)
+++ llvm/trunk/lib/MC/MCSymbol.cpp Sun Sep 13 13:04:46 2009
@@ -16,16 +16,27 @@
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 != '$' && C != '.' && C != '@')
return false;
-
- // If empty, we need quotes.
- if (Str.empty())
- return true;
+ return true;
+}
+
+static char HexDigit(int V) {
+ return V < 10 ? V+'0' : V+'A'-10;
+}
+
+static void MangleLetter(raw_ostream &OS, unsigned char C) {
+ OS << '_' << HexDigit(C >> 4) << HexDigit(C & 15) << '_';
+}
+
+/// NameNeedsEscaping - Return true if the identifier \arg Str needs quotes
+/// for this assembler.
+static bool NameNeedsEscaping(const StringRef &Str, const MCAsmInfo &MAI) {
+ assert(!Str.empty() && "Cannot create an empty MCSymbol");
// If the first character is a number, we need quotes.
if (Str[0] >= '0' && Str[0] <= '9')
@@ -33,23 +44,42 @@
// If any of the characters in the string is an unacceptable character, force
// quotes.
- for (unsigned i = 0, e = Str.size(); i != e; ++i) {
- char C = Str[i];
-
- if ((C < 'a' || C > 'z') &&
- (C < 'A' || C > 'Z') &&
- (C < '0' || C > '9') &&
- C != '_' && C != '$' && 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) {
+ // The first character is not allowed to be a number.
+ if (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];
+ }
+}
+
+
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 darwin and other systems that allow quoted names, just do that.
+ if (MAI->doesAllowQuotesInName()) {
+ OS << '"' << getName() << '"';
+ return;
+ }
+
+ // Otherwise, we have to mangle the name.
+ PrintMangledName(OS, getName());
}
void MCSymbol::dump() const {
Modified: llvm/trunk/lib/VMCore/Mangler.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Mangler.cpp?rev=81682&r1=81681&r2=81682&view=diff
==============================================================================
--- llvm/trunk/lib/VMCore/Mangler.cpp (original)
+++ llvm/trunk/lib/VMCore/Mangler.cpp Sun Sep 13 13:04:46 2009
@@ -222,4 +222,5 @@
markCharAcceptable('_');
markCharAcceptable('$');
markCharAcceptable('.');
+ markCharAcceptable('@');
}
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