}
static std::string MangleLetter(unsigned char C) {
- return std::string("_")+HexDigit(C >> 4) + HexDigit(C & 15) + "_";
+ char Result[] = { '_', HexDigit(C >> 4), HexDigit(C & 15), '_', 0 };
+ return Result;
}
/// makeNameProper - We don't want identifier names non-C-identifier characters
///
std::string Mangler::makeNameProper(const std::string &X, const char *Prefix) {
std::string Result;
-
- // If X does not start with (char)1, add the prefix.
- std::string::const_iterator I = X.begin();
- if (*I != 1)
- Result = Prefix;
- else
- ++I; // Skip over the marker.
+ if (X.empty()) return X; // Empty names are uniqued by the caller.
- // Mangle the first letter specially, don't allow numbers...
- if (*I >= '0' && *I <= '9')
- Result += MangleLetter(*I++);
-
- for (std::string::const_iterator E = X.end(); I != E; ++I)
- if ((*I < 'a' || *I > 'z') && (*I < 'A' || *I > 'Z') &&
- (*I < '0' || *I > '9') && *I != '_' && *I != '$')
- Result += MangleLetter(*I);
+ // If PreserveAsmNames is set, names with asm identifiers are not modified.
+ if (PreserveAsmNames && X[0] == 1)
+ return X;
+
+ if (!UseQuotes) {
+ // If X does not start with (char)1, add the prefix.
+ std::string::const_iterator I = X.begin();
+ if (*I != 1)
+ Result = Prefix;
+ else
+ ++I; // Skip over the marker.
+
+ // Mangle the first letter specially, don't allow numbers.
+ if (*I >= '0' && *I <= '9')
+ Result += MangleLetter(*I++);
+
+ for (std::string::const_iterator E = X.end(); I != E; ++I) {
+ if (!isCharAcceptable(*I))
+ Result += MangleLetter(*I);
+ else
+ Result += *I;
+ }
+ } else {
+ bool NeedsQuotes = false;
+
+ std::string::const_iterator I = X.begin();
+ if (*I == 1)
+ ++I; // Skip over the marker.
+
+ // If the first character is a number, we need quotes.
+ if (*I >= '0' && *I <= '9')
+ NeedsQuotes = true;
+
+ // Do an initial scan of the string, checking to see if we need quotes or
+ // to escape a '"' or not.
+ if (!NeedsQuotes)
+ for (std::string::const_iterator E = X.end(); I != E; ++I)
+ if (!isCharAcceptable(*I)) {
+ NeedsQuotes = true;
+ break;
+ }
+
+ // In the common case, we don't need quotes. Handle this quickly.
+ if (!NeedsQuotes) {
+ if (*X.begin() != 1)
+ return Prefix+X;
+ else
+ return X.substr(1);
+ }
+
+ // Otherwise, construct the string the expensive way.
+ I = X.begin();
+
+ // If X does not start with (char)1, add the prefix.
+ if (*I != 1)
+ Result = Prefix;
else
- Result += *I;
+ ++I; // Skip the marker if present.
+
+ for (std::string::const_iterator E = X.end(); I != E; ++I) {
+ if (*I == '"')
+ Result += "_QQ_";
+ else
+ Result += *I;
+ }
+ Result = '"' + Result + '"';
+ }
return Result;
}
// - Otherwise, mangling occurs if global collides with existing name.
if (isa<Function>(GV) && cast<Function>(GV)->getIntrinsicID()) {
Name = GV->getName(); // Is an intrinsic function
+ } else if (!GV->hasName()) {
+ // Must mangle the global into a unique ID.
+ unsigned TypeUniqueID = getTypeID(GV->getType());
+ static unsigned GlobalID = 0;
+ Name = "__unnamed_" + utostr(TypeUniqueID) + "_" + utostr(GlobalID++);
} else if (!MangledGlobals.count(GV)) {
Name = makeNameProper(GV->getName(), Prefix);
} else {
void Mangler::InsertName(GlobalValue *GV,
std::map<std::string, GlobalValue*> &Names) {
- if (!GV->hasName()) { // We must mangle unnamed globals.
- MangledGlobals.insert(GV);
+ if (!GV->hasName()) // We must mangle unnamed globals.
return;
- }
// Figure out if this is already used.
GlobalValue *&ExistingValue = Names[GV->getName()];
ExistingValue = GV;
} else {
// If GV is external but the existing one is static, mangle the existing one
- if (GV->hasExternalLinkage() && !ExistingValue->hasExternalLinkage()) {
+ if ((GV->hasExternalLinkage() || GV->hasDLLImportLinkage()) &&
+ !(ExistingValue->hasExternalLinkage() || ExistingValue->hasDLLImportLinkage())) {
MangledGlobals.insert(ExistingValue);
ExistingValue = GV;
+ } else if ((GV->hasExternalLinkage() ||
+ GV->hasDLLImportLinkage()) &&
+ (ExistingValue->hasExternalLinkage() ||
+ ExistingValue->hasDLLImportLinkage()) &&
+ GV->isExternal() &&
+ ExistingValue->isExternal()) {
+ // If the two globals both have external inkage, and are both external,
+ // don't mangle either of them, we just have some silly type mismatch.
} else {
// Otherwise, mangle GV
MangledGlobals.insert(GV);
Mangler::Mangler(Module &M, const char *prefix)
- : Prefix(prefix), Count(0), TypeCounter(0) {
+ : Prefix(prefix), UseQuotes(false), PreserveAsmNames(false),
+ Count(0), TypeCounter(0) {
+ std::fill(AcceptableChars,
+ AcceptableChars+sizeof(AcceptableChars)/sizeof(AcceptableChars[0]),
+ 0);
+
+ // Letters and numbers are acceptable.
+ for (unsigned char X = 'a'; X <= 'z'; ++X)
+ markCharAcceptable(X);
+ for (unsigned char X = 'A'; X <= 'Z'; ++X)
+ markCharAcceptable(X);
+ for (unsigned char X = '0'; X <= '9'; ++X)
+ markCharAcceptable(X);
+
+ // These chars are acceptable.
+ markCharAcceptable('_');
+ markCharAcceptable('$');
+ markCharAcceptable('.');
+
// Calculate which global values have names that will collide when we throw
// away type information.
std::map<std::string, GlobalValue*> Names;
for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
InsertName(I, Names);
}
+
+// Cause this file to be linked in when Support/Mangler.h is #included
+DEFINING_FILE_FOR(Mangler)
projects / oota-llvm.git / blobdiff