//
// 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
///
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.
+
+ // If PreserveAsmNames is set, names with asm identifiers are not modified.
+ if (PreserveAsmNames && X[0] == 1)
+ return X;
- // 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 (!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 if (*I == '\n')
+ Result += "_NL_";
+ else
+ Result += *I;
+ }
+ Result = '"' + Result + '"';
+ }
return Result;
}
}
-std::string Mangler::getValueName(const GlobalValue *GV) {
+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())
// 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
+ 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 unsigned GlobalID = 0;
+ Name = "__unnamed_" + utostr(TypeUniqueID) + "_" + utostr(GlobalID++);
} else if (!MangledGlobals.count(GV)) {
- Name = makeNameProper(GV->getName(), Prefix);
+ Name = makeNameProper(GV->getName() + Suffix, Prefix);
} else {
unsigned TypeUniqueID = getTypeID(GV->getType());
Name = "l" + utostr(TypeUniqueID) + "_" + makeNameProper(GV->getName());
return Name;
}
-void Mangler::InsertName(GlobalValue *GV,
- std::map<std::string, GlobalValue*> &Names) {
- if (!GV->hasName()) { // We must mangle unnamed globals.
- MangledGlobals.insert(GV);
+static void InsertName(GlobalValue *GV, StringMap<GlobalValue*> &Names,
+ SmallPtrSet<const GlobalValue*, 16> &MangledGlobals) {
+ if (!GV->hasName()) // We must mangle unnamed globals.
return;
- }
// Figure out if this is already used.
- GlobalValue *&ExistingValue = Names[GV->getName()];
+ GlobalValue *&ExistingValue = Names[GV->getNameStart()];
if (!ExistingValue) {
ExistingValue = GV;
+ return;
+ }
+
+ // If GV is external but the existing one is static, mangle the existing one
+ 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->isDeclaration() &&
+ ExistingValue->isDeclaration()) {
+ // 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 {
- // 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);
- }
+ // Otherwise, mangle GV
+ MangledGlobals.insert(GV);
}
}
-Mangler::Mangler(Module &m, const char *prefix)
- : M(m), Prefix(prefix), TypeCounter(0), Count(0) {
+Mangler::Mangler(Module &M, const char *prefix)
+ : Prefix(prefix), UseQuotes(false), PreserveAsmNames(false),
+ Count(0), TypeCounter(0) {
+ std::fill(AcceptableChars, array_endof(AcceptableChars), 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;
+ StringMap<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);
+ InsertName(I, Names, MangledGlobals);
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
+ InsertName(I, Names, MangledGlobals);
}
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