reapply the mangler gutting patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93656 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 183 deletions

diff --git a/lib/VMCore/Mangler.cpp b/lib/VMCore/Mangler.cpp
index 9f6c960507..d68f12bd4f 100644
--- a/lib/VMCore/Mangler.cpp
+++ b/lib/VMCore/Mangler.cpp
@@ -7,180 +7,17 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// Unified name mangler for CWriter and assembly backends.
+// Unified name mangler for assembly backends.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Mangler.h"
-#include "llvm/Function.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
+#include "llvm/GlobalValue.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
-static char HexDigit(int V) {
-  return V < 10 ? V+'0' : V+'A'-10;
-}
-
-static void MangleLetter(SmallVectorImpl<char> &OutName, unsigned char C) {
-  OutName.push_back('_');
-  OutName.push_back(HexDigit(C >> 4));
-  OutName.push_back(HexDigit(C & 15));
-  OutName.push_back('_');
-}
-
-/// makeNameProper - We don't want identifier names non-C-identifier characters
-/// in them, so mangle them as appropriate.
-///
-/// FIXME: This is deprecated, new code should use getNameWithPrefix and use
-/// MCSymbol printing to handle quotes or not etc.
-///
-void Mangler::makeNameProper(SmallVectorImpl<char> &OutName,
-                             const Twine &TheName,
-                             ManglerPrefixTy PrefixTy) {
-  SmallString<256> TmpData;
-  StringRef X = TheName.toStringRef(TmpData);
-  assert(!X.empty() && "Cannot mangle empty strings");
-  
-  if (!UseQuotes) {
-    // If X does not start with (char)1, add the prefix.
-    StringRef::iterator I = X.begin();
-    if (*I == 1) {
-      ++I;  // Skip over the no-prefix marker.
-    } else {
-      if (PrefixTy == Mangler::Private)
-        OutName.append(PrivatePrefix, PrivatePrefix+strlen(PrivatePrefix));
-      else if (PrefixTy == Mangler::LinkerPrivate)
-        OutName.append(LinkerPrivatePrefix,
-                       LinkerPrivatePrefix+strlen(LinkerPrivatePrefix));
-      OutName.append(Prefix, Prefix+strlen(Prefix));
-    }
-    
-    // Mangle the first letter specially, don't allow numbers unless the target
-    // explicitly allows them.
-    if (!SymbolsCanStartWithDigit && *I >= '0' && *I <= '9')
-      MangleLetter(OutName, *I++);
-
-    for (StringRef::iterator E = X.end(); I != E; ++I) {
-      if (!isCharAcceptable(*I))
-        MangleLetter(OutName, *I);
-      else
-        OutName.push_back(*I);
-    }
-    return;
-  }
-
-  bool NeedPrefix = true;
-  bool NeedQuotes = false;
-  StringRef::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 (StringRef::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 (!NeedQuotes) {
-    if (!NeedPrefix) {
-      OutName.append(X.begin()+1, X.end());   // Strip off the \001.
-      return;
-    }
-
-    if (PrefixTy == Mangler::Private)
-      OutName.append(PrivatePrefix, PrivatePrefix+strlen(PrivatePrefix));
-    else if (PrefixTy == Mangler::LinkerPrivate)
-      OutName.append(LinkerPrivatePrefix,
-                     LinkerPrivatePrefix+strlen(LinkerPrivatePrefix));
-    
-    if (Prefix[0] == 0)
-      ; // Common noop, no prefix.
-    else if (Prefix[1] == 0)
-      OutName.push_back(Prefix[0]);  // Common, one character prefix.
-    else
-      OutName.append(Prefix, Prefix+strlen(Prefix)); // Arbitrary prefix.
-    OutName.append(X.begin(), X.end());
-    return;
-  }
-
-  // Add leading quote.
-  OutName.push_back('"');
-  
-  // Add prefixes unless disabled.
-  if (NeedPrefix) {
-    if (PrefixTy == Mangler::Private)
-      OutName.append(PrivatePrefix, PrivatePrefix+strlen(PrivatePrefix));
-    else if (PrefixTy == Mangler::LinkerPrivate)
-      OutName.append(LinkerPrivatePrefix,
-                     LinkerPrivatePrefix+strlen(LinkerPrivatePrefix));
-    OutName.append(Prefix, Prefix+strlen(Prefix));
-  }
-  
-  // Add the piece that we already scanned through.
-  OutName.append(X.begin()+!NeedPrefix, I);
-  
-  // Otherwise, construct the string the expensive way.
-  for (StringRef::iterator E = X.end(); I != E; ++I) {
-    if (*I == '"') {
-      const char *Quote = "_QQ_";
-      OutName.append(Quote, Quote+4);
-    } else if (*I == '\n') {
-      const char *Newline = "_NL_";
-      OutName.append(Newline, Newline+4);
-    } else
-      OutName.push_back(*I);
-  }
-
-  // Add trailing quote.
-  OutName.push_back('"');
-}
-
-/// 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.
-///
-/// FIXME: This is deprecated, new code should use getNameWithPrefix and use
-/// MCSymbol printing to handle quotes or not etc.
-///
-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;
-
-  SmallString<128> Result;
-  if (GV->hasName()) {
-    makeNameProper(Result, GV->getNameStr() + Suffix, PrefixTy);
-    return Result.str().str();
-  }
-  
-  // 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.
-  makeNameProper(Result, "__unnamed_" + utostr(ID) + Suffix, PrefixTy);
-  return Result.str().str();
-}
-
 /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
 /// and the specified name as the global variable name.  GVName must not be
 /// empty.
@@ -263,21 +100,5 @@ std::string Mangler::getNameWithPrefix(const GlobalValue *GV,
 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(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('.');
-  markCharAcceptable('@');
+    LinkerPrivatePrefix(linkerPrivatePrefix), NextAnonGlobalID(1) {
 }