//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Support/Mangler.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
using namespace llvm;
static char HexDigit(int V) {
}
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
/// in them, so mangle them as appropriate.
///
-std::string Mangler::makeNameProper(const std::string &X, const char *Prefix) {
- std::string Result;
+std::string Mangler::makeNameProper(const std::string &X,
+ ManglerPrefixTy PrefixTy) {
+ assert(!X.empty() && "Cannot mangle empty strings");
if (!UseQuotes) {
+ std::string Result;
+
// If X does not start with (char)1, add the prefix.
+ bool NeedPrefix = true;
std::string::const_iterator I = X.begin();
- if (*I != 1)
- Result = Prefix;
- else
+ if (*I == 1) {
+ NeedPrefix = false;
++I; // Skip over the marker.
+ }
- // Mangle the first letter specially, don't allow numbers...
+ // 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 != '$')
+ for (std::string::const_iterator E = X.end(); I != E; ++I) {
+ if (!isCharAcceptable(*I))
Result += MangleLetter(*I);
else
Result += *I;
- } else {
- bool NeedsQuotes = false;
-
- // If X does not start with (char)1, add the prefix.
- std::string::const_iterator I = X.begin();
- if (*I != 1)
- Result = Prefix;
- else
- ++I; // Skip over the marker.
-
- // If the first character is a number, we need quotes.
- if (*I >= '0' && *I <= '9')
- NeedsQuotes = true;
+ }
+
+ if (NeedPrefix) {
+ Result = Prefix + Result;
+
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
+ }
+
+ return Result;
+ }
+
+ bool NeedPrefix = true;
+ bool NeedQuotes = false;
+ std::string Result;
+ std::string::const_iterator I = X.begin();
+ if (*I == 1) {
+ NeedPrefix = false;
+ ++I; // Skip over the marker.
+ }
+
+ // If the first character is a number, we need quotes.
+ if (*I >= '0' && *I <= '9')
+ NeedQuotes = true;
+ // Do an initial scan of the string, checking to see if we need quotes or
+ // to escape a '"' or not.
+ if (!NeedQuotes)
for (std::string::const_iterator E = X.end(); I != E; ++I)
- if (*I == '"')
- Result += "_QQ_";
- else {
- if ((*I < 'a' || *I > 'z') && (*I < 'A' || *I > 'Z') &&
- (*I < '0' || *I > '9') && *I != '_' && *I != '$' && *I != '.')
- NeedsQuotes = true;
- Result += *I;
+ if (!isCharAcceptable(*I)) {
+ NeedQuotes = true;
+ break;
}
- if (NeedsQuotes)
- Result = '"' + Result + '"';
- }
- return Result;
-}
+
+ // In the common case, we don't need quotes. Handle this quickly.
+ if (!NeedQuotes) {
+ if (!NeedPrefix)
+ return X.substr(1); // Strip off the \001.
+
+ Result = Prefix + X;
-/// getTypeID - Return a unique ID for the specified LLVM type.
-///
-unsigned Mangler::getTypeID(const Type *Ty) {
- unsigned &E = TypeMap[Ty];
- if (E == 0) E = ++TypeCounter;
- return E;
-}
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
-std::string Mangler::getValueName(const Value *V) {
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
- return getValueName(GV);
-
- std::string &Name = Memo[V];
- if (!Name.empty())
- return Name; // Return the already-computed name for V.
-
- // Always mangle local names.
- Name = "ltmp_" + utostr(Count++) + "_" + utostr(getTypeID(V->getType()));
- return Name;
-}
+ return Result;
+ }
+ if (NeedPrefix)
+ 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 (*I == '"')
+ Result += "_QQ_";
+ else if (*I == '\n')
+ Result += "_NL_";
+ else
+ Result += *I;
+ }
+
+ if (NeedPrefix) {
+ Result = Prefix + Result;
-std::string Mangler::getValueName(const GlobalValue *GV) {
- // 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)->getIntrinsicID()) {
- Name = GV->getName(); // Is an intrinsic function
- } else if (!MangledGlobals.count(GV)) {
- Name = makeNameProper(GV->getName(), Prefix);
- } else {
- unsigned TypeUniqueID = getTypeID(GV->getType());
- Name = "l" + utostr(TypeUniqueID) + "_" + makeNameProper(GV->getName());
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
}
- return Name;
+ Result = '"' + Result + '"';
+ return Result;
}
-void Mangler::InsertName(GlobalValue *GV,
- std::map<std::string, GlobalValue*> &Names) {
- if (!GV->hasName()) { // We must mangle unnamed globals.
- MangledGlobals.insert(GV);
- return;
- }
+/// 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.
+///
+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");
- // Figure out if this is already used.
- GlobalValue *&ExistingValue = Names[GV->getName()];
- if (!ExistingValue) {
- ExistingValue = GV;
- } else {
- // If GV is external but the existing one is static, mangle the existing one
- if (GV->hasExternalLinkage() && !ExistingValue->hasExternalLinkage()) {
- MangledGlobals.insert(ExistingValue);
- ExistingValue = GV;
- } else {
- // Otherwise, mangle GV
- MangledGlobals.insert(GV);
- }
- }
+ ManglerPrefixTy PrefixTy =
+ (GV->hasPrivateLinkage() || ForcePrivate) ? Mangler::Private :
+ GV->hasLinkerPrivateLinkage() ? Mangler::LinkerPrivate : Mangler::Default;
+
+ if (GV->hasName())
+ return makeNameProper(GV->getNameStr() + Suffix, PrefixTy);
+
+ // 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++;
+
+ // 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,
+ const char *linkerPrivatePrefix)
+ : Prefix(prefix), PrivatePrefix(privatePrefix),
+ LinkerPrivatePrefix(linkerPrivatePrefix), UseQuotes(false),
+ NextAnonGlobalID(1) {
+ std::fill(AcceptableChars, array_endof(AcceptableChars), 0);
-Mangler::Mangler(Module &M, const char *prefix)
- : Prefix(prefix), UseQuotes(false), Count(0), TypeCounter(0) {
- // Calculate which global values have names that will collide when we throw
- // away type information.
- std::map<std::string, GlobalValue*> Names;
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- InsertName(I, Names);
- for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
- InsertName(I, Names);
+ // 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('.');
}
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