//
// 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/Function.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
static char HexDigit(int V) {
/// 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;
- if (X.empty()) return X; // Empty names are uniqued by the caller.
+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.
- if (*I >= '0' && *I <= '9')
+ // Mangle the first letter specially, don't allow numbers unless the target
+ // explicitly allows them.
+ if (!SymbolsCanStartWithDigit && *I >= '0' && *I <= '9')
Result += MangleLetter(*I++);
for (std::string::const_iterator E = X.end(); I != E; ++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;
+ 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 (!NeedsQuotes)
- for (std::string::const_iterator E = X.end(); I != E; ++I)
- if (!isCharAcceptable(*I)) {
- NeedsQuotes = true;
- break;
- }
+ // 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 (!isCharAcceptable(*I)) {
+ NeedQuotes = 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);
- }
+ // In the common case, we don't need quotes. Handle this quickly.
+ if (!NeedQuotes) {
+ if (!NeedPrefix)
+ return X.substr(1); // Strip off the \001.
- // Otherwise, construct the string the expensive way.
- I = X.begin();
+ Result = Prefix + X;
+
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
+
+ return Result;
+ }
+
+ if (NeedPrefix)
+ Result = X.substr(0, I-X.begin());
- // If X does not start with (char)1, add the prefix.
- if (*I != 1)
- Result = Prefix;
+ // 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
- ++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 + '"';
+ Result += *I;
+ }
+
+ if (NeedPrefix) {
+ 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");
+
+ ManglerPrefixTy PrefixTy =
+ (GV->hasPrivateLinkage() || ForcePrivate) ? Mangler::Private :
+ GV->hasLinkerPrivateLinkage() ? Mangler::LinkerPrivate : Mangler::Default;
-std::string Mangler::getValueName(const Value *V) {
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
- return getValueName(GV);
+ 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;
+ // Must mangle the global into a unique ID.
+ return makeNameProper("__unnamed_" + utostr(ID) + Suffix, PrefixTy);
}
-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 (!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 {
- unsigned TypeUniqueID = getTypeID(GV->getType());
- Name = "l" + utostr(TypeUniqueID) + "_" + makeNameProper(GV->getName());
+/// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
+/// and the specified global variable's name. If the global variable doesn't
+/// have a name, this fills in a unique name for the global.
+void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
+ const GlobalValue *GV,
+ bool isImplicitlyPrivate) {
+
+ // If the global is anonymous or not led with \1, then add the appropriate
+ // prefix.
+ if (!GV->hasName() || GV->getName()[0] != '\1') {
+ if (GV->hasPrivateLinkage() || isImplicitlyPrivate)
+ OutName.append(PrivatePrefix, PrivatePrefix+strlen(PrivatePrefix));
+ else if (GV->hasLinkerPrivateLinkage())
+ OutName.append(LinkerPrivatePrefix,
+ LinkerPrivatePrefix+strlen(LinkerPrivatePrefix));;
+ OutName.append(Prefix, Prefix+strlen(Prefix));
}
- return Name;
-}
-
-void Mangler::InsertName(GlobalValue *GV,
- std::map<std::string, GlobalValue*> &Names) {
- if (!GV->hasName()) // We must mangle unnamed globals.
+ // If the global has a name, just append it now.
+ if (GV->hasName()) {
+ StringRef Name = GV->getName();
+
+ // Strip off the prefix marker if present.
+ if (Name[0] != '\1')
+ OutName.append(Name.begin(), Name.end());
+ else
+ OutName.append(Name.begin()+1, Name.end());
return;
-
- // 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);
- }
}
+
+ // If the global variable doesn't have a name, return a unique name for the
+ // global based on a numbering.
+
+ // 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.
+ raw_svector_ostream(OutName) << "__unnamed_" << ID;
}
-Mangler::Mangler(Module &M, const char *prefix)
- : Prefix(prefix), UseQuotes(false), Count(0), TypeCounter(0) {
- std::fill(AcceptableChars,
- AcceptableChars+sizeof(AcceptableChars)/sizeof(AcceptableChars[0]),
- 0);
+Mangler::Mangler(Module &M, const char *prefix, const char *privatePrefix,
+ const char *linkerPrivatePrefix)
+ : Prefix(prefix), PrivatePrefix(privatePrefix),
+ LinkerPrivatePrefix(linkerPrivatePrefix), UseQuotes(false),
+ SymbolsCanStartWithDigit(false), NextAnonGlobalID(1) {
+ std::fill(AcceptableChars, array_endof(AcceptableChars), 0);
// Letters and numbers are acceptable.
for (unsigned char X = 'a'; X <= 'z'; ++X)
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::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);
+ markCharAcceptable('@');
}
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