#include "llvm/Support/Mangler.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
-#include "llvm/System/Atomic.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
/// makeNameProper - We don't want identifier names non-C-identifier characters
/// in them, so mangle them as appropriate.
///
-std::string Mangler::makeNameProper(const std::string &X, const char *Prefix,
- const char *PrivatePrefix) {
- if (X.empty()) return X; // Empty names are uniqued by the caller.
-
- // If PreserveAsmNames is set, names with asm identifiers are not modified.
- if (PreserveAsmNames && X[0] == 1)
- return X;
+std::string Mangler::makeNameProper(const std::string &X,
+ ManglerPrefixTy PrefixTy) {
+ assert(!X.empty() && "Cannot mangle empty strings");
if (!UseQuotes) {
std::string Result;
}
if (NeedPrefix) {
- if (Prefix)
- Result = Prefix + Result;
- if (PrivatePrefix)
+ Result = Prefix + Result;
+
+ if (PrefixTy == Mangler::Private)
Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
}
+
return Result;
}
// In the common case, we don't need quotes. Handle this quickly.
if (!NeedQuotes) {
- if (NeedPrefix) {
- if (Prefix)
- Result = Prefix + X;
- else
- Result = X;
- if (PrivatePrefix)
- Result = PrivatePrefix + Result;
- return Result;
- } else
- return X.substr(1);
+ if (!NeedPrefix)
+ return X.substr(1); // Strip off the \001.
+
+ Result = Prefix + X;
+
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
+
+ return Result;
}
+
+ Result = X.substr(0, I-X.begin());
// Otherwise, construct the string the expensive way.
for (std::string::const_iterator E = X.end(); I != E; ++I) {
}
if (NeedPrefix) {
- if (Prefix)
- Result = Prefix + X;
- else
- Result = X;
- if (PrivatePrefix)
+ Result = Prefix + Result;
+
+ if (PrefixTy == Mangler::Private)
Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
}
+
Result = '"' + Result + '"';
return Result;
}
-/// getTypeID - Return a unique ID for the specified LLVM type.
+/// getMangledName - Returns the mangled name of V, an LLVM Value,
+/// in the current module. If 'Suffix' is specified, the name ends with the
+/// specified suffix. If 'ForcePrivate' is specified, the label is specified
+/// to have a private label prefix.
///
-unsigned Mangler::getTypeID(const Type *Ty) {
- unsigned &E = TypeMap[Ty];
- if (E == 0) E = ++TypeCounter;
- return E;
-}
+std::string Mangler::getMangledName(const GlobalValue *GV, const char *Suffix,
+ bool ForcePrivate) {
+ assert((!isa<Function>(GV) || !cast<Function>(GV)->isIntrinsic()) &&
+ "Intrinsic functions cannot be mangled by Mangler");
-std::string Mangler::getValueName(const Value *V) {
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
- return getValueName(GV);
+ ManglerPrefixTy PrefixTy =
+ (GV->hasPrivateLinkage() || ForcePrivate) ? Mangler::Private :
+ GV->hasLinkerPrivateLinkage() ? Mangler::LinkerPrivate : Mangler::Default;
+
+ if (GV->hasName())
+ return makeNameProper(GV->getNameStr() + Suffix, PrefixTy);
- std::string &Name = Memo[V];
- if (!Name.empty())
- return Name; // Return the already-computed name for V.
+ // Get the ID for the global, assigning a new one if we haven't got one
+ // already.
+ unsigned &ID = AnonGlobalIDs[GV];
+ if (ID == 0) ID = NextAnonGlobalID++;
- // Always mangle local names.
- Name = "ltmp_" + utostr(Count++) + "_" + utostr(getTypeID(V->getType()));
- return Name;
-}
-
-
-std::string Mangler::getValueName(const GlobalValue *GV, const char * Suffix) {
- // Check to see whether we've already named V.
- std::string &Name = Memo[GV];
- if (!Name.empty())
- return Name; // Return the already-computed name for V.
-
- // Name mangling occurs as follows:
- // - If V is an intrinsic function, do not change name at all
- // - Otherwise, mangling occurs if global collides with existing name.
- if (isa<Function>(GV) && cast<Function>(GV)->isIntrinsic()) {
- Name = GV->getNameStart(); // Is an intrinsic function
- } else if (!GV->hasName()) {
- // Must mangle the global into a unique ID.
- unsigned TypeUniqueID = getTypeID(GV->getType());
- static int32_t GlobalID = 0;
-
- int32_t OldID = GlobalID;
- sys::AtomicIncrement32(&GlobalID);
-
- Name = "__unnamed_" + utostr(TypeUniqueID) + "_" + utostr(OldID);
- } else {
- if (GV->hasPrivateLinkage())
- Name = makeNameProper(GV->getName() + Suffix, Prefix, PrivatePrefix);
- else
- Name = makeNameProper(GV->getName() + Suffix, Prefix);
- }
-
- return Name;
+ // Must mangle the global into a unique ID.
+ return makeNameProper("__unnamed_" + utostr(ID) + Suffix, PrefixTy);
}
-Mangler::Mangler(Module &M, const char *prefix, const char *privatePrefix)
- : Prefix(prefix), PrivatePrefix (privatePrefix), UseQuotes(false),
- PreserveAsmNames(false), Count(0), TypeCounter(0) {
+Mangler::Mangler(Module &M, const char *prefix, const char *privatePrefix,
+ const char *linkerPrivatePrefix)
+ : Prefix(prefix), PrivatePrefix(privatePrefix),
+ LinkerPrivatePrefix(linkerPrivatePrefix), UseQuotes(false),
+ NextAnonGlobalID(1) {
std::fill(AcceptableChars, array_endof(AcceptableChars), 0);
// Letters and numbers are acceptable.
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